PowerLogic™ EM7230 / EM7280 / EM7290

User Guide
HRB32898-EN07
05/2017
Safety Information

Important Information
Read these instructions carefully and look at the equipment to become
familiar with the device before trying to install, operate, service or maintain it.
The following special messages may appear throughout this manual or on
the equipment to warn of potential hazards or to call attention to information
that clarifies or simplifies a procedure.
The addition of either symbol to a “Danger” or “Warning” safety label indicates that
an electrical hazard exists which will result in personal injury if the instructions are
not followed.

This is the safety alert symbol. It is used to alert you to potential personal injury
hazards. Obey all safety messages that follow this symbol to avoid possible injury
or death.

DANGER indicates a hazardous situation which, if not avoided, will result in

death or serious injury.

WARNING indicates a hazardous situation which, if not avoided, could result in

death or serious injury.

CAUTION indicates a hazardous situation which, if not avoided, could result in

minor or moderate injury.

NOTICE is used to address practices not related to physical injury.

Please note
Electrical equipment should be installed, operated, serviced and maintained only by
qualified personnel. No responsibility is assumed by Schneider Electric for any
consequences arising out of the use of this material.

A qualified person is one who has skills and knowledge related to the construction,
installation, and operation of electrical equipment and has received safety training
to recognize and avoid the hazards involved.
HRB32898-EN07 PowerLogic™ EM7230 / EM7280 / EM7290
05/2017 Table of Contents

Table of Contents
Chapter 1: Introduction Smart Demand Controller Hardware ................................................................................ 7
Smart Demand Controller Parts and Accessories ......................................................... 8
Box Contents ................................................................................................................. 8

Chapter 2: Safety Before You Begin ............................................................................................................. 9

Precautions

Chapter 3: Technical Technical Specification ................................................................................................... 10

Specification

Chapter 4: Operation Operating the Display ..................................................................................................... 14

How the Buttons Work .................................................................................................... 15
Changing Values ......................................................................................................... 15
Icons ............................................................................................................................ 16
LED indicators ............................................................................................................. 16
Menu Overview ............................................................................................................... 17
Setting Up the Smart Demand Controller ....................................................................... 18
Smart Demand Controller Configurations ................................................................... 18
Smart Demand Controller Basic Setup ........................................................................... 25
Setting Up CT Options ................................................................................................ 25
Setting Up PT (VT) Options ........................................................................................ 26
Setting Up the Starting Current and System Configuration ......................................... 27
Setting Up the PF Standard ........................................................................................ 28
Setting Up the PF Lock ............................................................................................... 28
.................................................................................................................................... 29
Smart Demand Controller Password Setup ................................................................ 30
Smart Demand Controller - Demand Setup .................................................................... 30
Setting Up Demand ........................................................................................................ 31
Smart Demand Controller Communication Setup .......................................................... 34
Setting Up Communications ........................................................................................ 35
Smart Demand Controller HMI Setup ............................................................................. 35
Setting Up the HMI ...................................................................................................... 36
Smart Demand Controller Clock Setup .......................................................................... 37
Setting Up the Clock ................................................................................................... 38
Smart Demand Controller - Auto Reset .......................................................................... 39
Setting Up Auto Reset ................................................................................................. 40
Time Of Use (TOU) ........................................................................................................ 40
Smart Demand Controller - TOU ................................................................................. 41
TOU Setting and Configuration ................................................................................... 41
Setting Up TOU ........................................................................................................... 43
SnapShot ........................................................................................................................ 45
Smart Demand Controller - SnapShot ........................................................................ 45
Viewing SnapShot Page ............................................................................................. 45
Setting Up SnapShot ................................................................................................... 46
Rate Counter .................................................................................................................. 46
Smart Demand Controller - Rate ................................................................................. 46
Viewing Rate Page ...................................................................................................... 47
Setting Up Rate ........................................................................................................... 48
Smart Demand Controller Diagnostics ........................................................................... 49
Diagnostics .................................................................................................................. 49
Smart Demand Controller Reset .................................................................................... 49
Reset ........................................................................................................................... 50

Chapter 5: Metering Smart Demand Controller Characteristics ...................................................................... 52

MODBUS RS-485 ....................................................................................................... 53
Digital Inputs ............................................................................................................... 54
Relay Outputs ............................................................................................................. 54
Minimum/Maximum Values for Real-Time Readings ..................................................... 54

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PowerLogic™ EM7230 / EM7280 / EM7290 HRB32898-EN07
Table of Contents 05/2017

Minimum/Maximum Profile ..............................................................................................54

Demand Readings ..........................................................................................................55
Demand Calculation Methods .....................................................................................55
Predicted Demand .......................................................................................................56
Max Demand ...............................................................................................................56
Demand Profiles ..........................................................................................................57
Power Cycle Modes .....................................................................................................57
Control Power interruptions .........................................................................................58
Timer Offset .................................................................................................................58
Integrator .....................................................................................................................58
Energy Readings ............................................................................................................58
Quadrant Based VARh ...................................................................................................59
Preset Energy Values .....................................................................................................59
Timers .............................................................................................................................60
Previous (Old) Readings .................................................................................................60
Harmonics .......................................................................................................................60
THD .............................................................................................................................60
Individual Harmonic .....................................................................................................60
Time Of Use (TOU) .........................................................................................................61
Installation .......................................................................................................................62
Mechanical Installation ................................................................................................62
Mounting ......................................................................................................................63

Chapter 6: Maintenance and Password Recovery ........................................................................................................64

Troubleshooting Smart Demand Controller Memory .................................................................................64
Identifying the Firmware Version, Model, and Serial Number .........................................64
Firmware Upgrade ..........................................................................................................64
Troubleshooting ..............................................................................................................65
Heartbeat/Communication LED ...................................................................................65
Getting Technical Support ..............................................................................................67
Register List ....................................................................................................................67

Chapter 7: CAL LED Setting up the CAL LED ..................................................................................................68

Configuring the CAL LED for energy pulsing using ION Setup .......................................68
Configuring the CAL LED using the front panel ..............................................................69

Appendix A: Communication Communications Capabilities ..........................................................................................71

Wiring Daisy-Chaining Devices to the Smart Demand Controller ..............................................71

Appendix B: Power Factor Power Factor Register Format ........................................................................................72

Register Format

Appendix C: Command Command Interface ........................................................................................................73

Interface Using the Protected Command Interface ........................................................................74
Using the Unprotected Command Interface ....................................................................75
Terms ..............................................................................................................................76
Abbreviations ..................................................................................................................78

Index .........................................................................................................................................80

6 © 2017 Schneider Electric. All Rights Reserved.

HRB32898-EN07 PowerLogic™ EM7230 / EM7280 / EM7290
05/2017 Introduction

Chapter 1—Introduction

EM7230 / EM7280 / EM7290 is a smart demand controller. It replaces over 20 individual

transducers and meters for comprehensive load management in 3-phase commercial and
industrial applications.

Table 1–1: EM7230 / EM7280 / EM7290 Model Information

Model Class Communication

EM7230 Class 1.0 RS-485
EM7280 Class 0.5S RS-485
EM7290 Class 0.2 RS-485

Smart Demand Controller Hardware

Figure 1– 1 Parts of the smart demand controller (rear view)

1 2

3
L N

7
4ZW2

(< 100V )
1A/5A NOM; 5mA - 6A

5 4

1. Control Output Relays

2. Voltage Inputs
3. Auxiliary Power Supply
4. Current Inputs
5. RS-485 Port
6. Digital Inputs
7. Retainer Clips

© 2017 Schneider Electric. All Rights Reserved. 7

PowerLogic™ EM7230 / EM7280 / EM7290 HRB32898-EN07
Introduction 05/2017

Smart Demand Controller Parts and Accessories

Table 1– 2 Smart demand controller Models

Description Model Number

Smart demand controller with Integrated Display PowerLogic™ EM7230 / EM7280 / EM7290

Box Contents
1. Smart demand controller (1)
2. Installation Guide (1)
3. Test Certificate (TC) (1)
4. Accessories and Spares

•Pluggable Blocks (5 types, one piece each)

•Retainer Clips (2) and
•Current Terminals Screws (3 spare)

8 © 2017 Schneider Electric. All Rights Reserved.

HRB32898-EN07 PowerLogic™ EM7230 / EM7280 / EM7290
05/2017 Safety Precautions

Chapter 2—Safety Precautions

Before You Begin

This section contains important safety precautions that must be followed before
attempting to install, service, or maintain electrical equipment. Carefully read and follow
the safety precautions outlined below.

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

• Apply appropriate personal protective equipment (PPE) and follow safe electrical
work practices. See NFPA 70E in the USA or applicable local standards.
• Only qualified electrical workers should install this equipment. Such work should be
performed only after reading this entire set of instructions.
• If the equipment is not used in a manner specified by the manufacturer, the protection
provided by the equipment may be impaired.
• NEVER work alone.
• Do not use this device for critical control or protection applications where human or
equipment safety relies on the operation of the control circuit.
• Before performing visual inspections, tests, or maintenance on this equipment,
disconnect all sources of electric power. Assume that all circuits are live until they
have been completely de-energized, tested, and tagged. Pay particular attention to
the design of the power system. Consider all sources of power, including the
possibility of backfeeding.
• Turn off all power supplying this device before working on it.
• Always use a properly rated voltage sensing device to confirm that all power is off.
• Do not exceed the device’s ratings for maximum limits.
• Before closing all covers and doors, carefully inspect the work area for tools and
objects that may have been left inside the equipment.
• When removing or installing panels, do not allow them to extend into the energized
bus.
• The successful operation of this equipment depends upon proper handling,
installation, and operation. Neglecting fundamental installation requirements may
lead to personal injury as well as damage to electrical equipment or other property.
• NEVER bypass external fusing.
• NEVER short the secondary of a PT or VT.
• NEVER open circuit a CT; use the shorting block to short circuit the leads of the CT
before removing the connection from the power meter.
• Before performing Dielectric (Hi-Pot) or Megger testing on any equipment in which the
power meter is installed, disconnect all input and output wires to the power meter.
High voltage testing may damage electronic components contained in the demand
controller.
• This equipment should be installed in a suitable electrical enclosure.
• Always use grounded external CTs for current inputs.
• All external CT’s and PT’s should have reinforced insulation.

Failure to follow these instructions will result in death or serious injury.

1. Turn off all power supplying this device before working on it.
2. Always use a properly rated voltage sensing device to confirm that all power is off.

© 2017 Schneider Electric. All Rights Reserved. 9

HRB32898-EN07 PowerLogic™ EM7230 / EM7280 / EM7290
05/2017 Technical Specification

Chapter 3—Technical Specification

Technical Specification
Table 3 –1: Models and Features
General EM7230 EM7280 EM7290
Current accuracy (50 mA to 6 A) ± 1.0% ± 0.5% ± 0.5%
Voltage accuracy (110 or 415/480 Vac LL nominal) ± 1.0% ± 0.5% ± 0.5%
Energy and Power accuracy ± 1.0% ± 0.5% ± 0.2%
Instantaneous rms values
Current (Average, Phases and neutral (calc))   
Voltage (Average, Ph-Ph, Ph-N)   
Frequency   
Unbalance (voltage and current)   
Percentage Load (I%)   
Phase angle   
Power values (total and phase-wise)
Real   
Reactive   
Apparent   
Power Factor (Average)   
Energy Values
Signed real and reactive energy and apparent energy   
Previous Energy Values
Signed real and reactive energy and apparent energy   
Timers
Run hrs, On hrs, Interruptions   
Previous Timers
Run hrs, On hrs, Interruptions   
Demand Values
Current, signed active, signed reactive, and apparent
power (present, last, predictive, and max.) max. date   
and time
Demand Period   
Demand Method   
DM Ctrl Parameter   
Pr.dm Interval   
Essential Load   
Dm Profile L0   
Dm Profile Step   
Demand UL   
Demand LL   
DM control   
Trip Status
Shed, restore, dm > UL, pd dm > UL   
Demand Profile
19 levels (kVA or kW or I)   
Power Quality Measurements
Total Harmonic Distortion (current, voltage)   
Individual Harmonic (upto 31st level)   
Time of Use
TOU   
Data Recording
Min/Max (four levels)   

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PowerLogic™ EM7230 / EM7280 / EM7290 HRB32898-EN07
Technical Specification 05/2017

Demand   
Display and I/O
Backlight LCD display   
Digital I/P   
Clock
Real Time Clock (RTC)   
Communication
RS-485 port   
Modbus protocol   
Snapshot
Date   
Time   
Rate Counter
Rate 1, Rate 2   

Table 3 –2: Technical Specifications

Description Specifications
Sensing/Measurement True RMS, one second update time, four quadrant power and energy
Parameter EM7230 EM7280 EM7290
Class 1.0 Class 0.5S Class 0.2
as per as per as per
Active Energy
IEC 62052-11 and IEC 62052-11 and IEC 62052-11 and
IEC 62053-21 IEC 62053-22 (1) IEC 62053-22 (1)(2)
Class 2.0 Class 2.0 Class 2.0
as per as per as per
Reactive Energy
IEC 62052-11 and IEC 62052-11 and IEC 62052-11 and
Accuracy IEC 62053-23 IEC 62053-23 IEC 62053-23
Active Power ± 1.0 % ± 0.5 % ± 0.2 %
Reactive Power ± 2.0 % ± 2.0 % ± 2.0 %
Apparent Power ± 1.0 % ± 0.5 % ± 0.2 %
Current and Voltage ± 1.0 % ± 0.5 % ± 0.5 %
Frequency ± 0.1 %
(1)
For 1A nominal CT, accuracy is applicable with an additional error of ± 1 % from 50 mA to 150 mA
and ± 3 % from 10 mA to 50 mA
(2)
Class 0.2S accuracy is applicable in 3P4W configuration with 5A CT nominal at 50Hz, tested in
accordance with the test methods and error limits given as per IEC 62052-11 and IEC 62053-22.
Auxiliary supply (control AC: 90-277 V L-N ±10%
power) DC: 125-250 V ± 20%
Voltage and current input < 0.2 VA per phase
Burden
Auxiliary supply (control power): Max 10 VA at 240 Vac; Max 4.5 W at 300 Vdc
Monochrome Graphics LCD
Display: every 1 second
Display
Demand update: every 15 seconds
Harmonic (%) update: every 5 seconds
Resolution 128x128 pixels
Voltage inputs (V1, V2, V3, VN)
Input Voltage 110/480 Vac LL nominal (range: 63.5-277 Vac LN; 110-480 Vac LL)
Measurement Voltage range : 90V to 480V LL max 277V LN
Current inputs (I1, I2, I3);
Input current 5A Nominal current: 50 mA to 6 A (Starting current: 5 mA)
1A Nominal current: 10 mA to 1.2 A (Starting current: 5 mA)
Frequency 50 /60 Hz ± 5%
Overload 10 A max continuous, 50 A @ 10 sec/hr, 500 A @ 1sec/hr
Operating temp: −10 °C to 60 °C (14 °F to 140 °F)
Environmental Storage temp: −25 °C to 70 °C (−13 °F to 158 °F)
Humidity 5% to 95% non-condensing
Measurement category: CAT III
Safety Pollution Degree 2
Double insulation at user-accessible area

11 © 2017 Schneider Electric. All Rights Reserved.

HRB32898-EN07 PowerLogic™ EM7230 / EM7280 / EM7290
05/2017 Technical Specification

RS-485 serial channel connection

Communication Industry standard Modbus RTU protocol
Baud rate support: Minimum: 4800; Maximum: 38400; Default: 19200
Front display: IP 51
IP Degree of Protection
Meter body: IP 30 (except connectors)
Product Weight 380 g (approx.)
Dimensions W x H x D
[protrusion from 96 x 96 x 71.7 mm (depth of meter from housing mounting flange) [12.6 mm]
cabinet]
Certifications:
as per IEC/UL 61010-1 Edition-3
4ZW2

Standards and Standards:

Certifications Emission: CISPR11 Class A; Fast Transient: IEC 61000-4-4**
Surge withstand: IEC 61000-4-5**
ESD: IEC 61000-4- 2**
Radiated Susceptibility: IEC61000-4-3**
Conducted susceptibility: IEC61000-4-6**
Voltage dips and interruptions: IEC61000-4-11**
Voltage Ratings: ON 18.5 to 36 Vdc ; OFF 0 to 4 Vdc
Input Resistance: 110 k Ohms
Status Digital Inputs
Maximum Frequency: 2 Hz, 50% duty cycle
Response Time: 10 milliseconds
Nominal Voltage: 24 Vdc
Whetting Output
Allowable Load: 8 mA
Control Output Relays CAT II, 240 Vac/3 A; 24 Vdc/2 A
Altitude 2000 m
Not suitable for wet locations
Indoor use only
NOTE:
**As per IEC 61326-1.

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PowerLogic™ EM7230 / EM7280 / EM7290 HRB32898-EN07
Technical Specification 05/2017

13 © 2017 Schneider Electric. All Rights Reserved.

HRB32898-EN07 PowerLogic™ EM7230 / EM7280 / EM7290
05/2017 Operation

Chapter 4—Operation

Operating the Display

The smart demand controller is equipped with a large, back-lit LCD display. It is designed
to display up to six lines of information plus a row of menu options.

Figure 4–1: Parts of the Smart Demand Controller

Screen Title

Edit

1. Wrench Icon (Maintenance) - or,

Heartbeat Icon -

2. Screen title
3. Product Model Number
4. CAL LED (Orange)
5. Communication LED (Green)
6. Menu selection buttons
7. Navigation and menu selections
8. Data Area
9. Cursor

© 2017 Schneider Electric. All Rights Reserved. 14

PowerLogic™ EM7230 / EM7280 / EM7290 HRB32898-EN07
Operation 05/2017

How the Buttons Work

Four buttons are located below the LCD display. The menu options determine the
button’s functions.

Table 4–1: Button Symbols

Navigation
Return to the previous screen. For setup screens:
> • If setup changes are made, a confirmation screen is displayed.
• If editing a value, exits edit mode and restores previous value.

> Move cursor down / go to the next item in the list.

>
> Move cursor up / go to the previous level.

Move the cursor one character to the left.

>

Move cursor one character to the right / go to the next level.

+ Increment active character; toggle list selection On.

- Decrement active character; toggle list selection Off.

Edit Select parameter or item to edit.

Select Select/deselect item for association.

OK Enter change to a parameter.

Yes Accept.

No Reject.

Reset Reset selected item.

• To differentiate between menu items and parameters, menu items are placed in
brackets. For example, “[Phase]” denotes a phase menu item, and “Phase” denotes a
phase parameter.
• Each time you read “press” in this manual, press and release the appropriate button
beneath a menu item. For example, if you are asked to “Press [Phase],” you would
press and release the button below the phase menu item.

Changing Values
When you enter a setup screen, the cursor points to the first setup item or parameter on
the screen. Press▼ and ▲ to move to the item or parameter you wish to edit. Press
[Edit] to select a parameter. The value to be edited is displayed in the edit field, with the
active digit of the setup value.

To change a text value:

• Press  to enter the selected value for the active digit and move to the next digit to
the right. At the maximum number of digits, the  takes you back to the first digit.
• Press + to increment and - to decrement the active digit through the numerals 0-9, the
letters A-Z, the “.” or any other possible selections.

15 © 2017 Schneider Electric. All Rights Reserved.

HRB32898-EN07 PowerLogic™ EM7230 / EM7280 / EM7290
05/2017 Operation

To change a numerical value:

• Press  to enter the selected value for the active digit and move to the next digit to
the left. At the maximum number of digits, the  takes you back to the first digit.
• Press + to increment the active digit through the numerals 0-9, and ".", "+", and "-".

To select a value from a list:

• Press + to scroll up and - to scroll down through the list of available selections.
• Press [OK] to enter the selected value.

Icons
The icons flash to indicate the smart demand controller LCD is operational.

• Wrench Icon( )—The smart demand controller requires maintenance.

• Heartbeat Icon( )—The smart demand controller LCD is operational.

LED indicators
The meter has two LED indicators on the front panel.

Figure 4–2: LED indicators

4 CAL LED (orange)

5 Heartbeat / communications LED (green)

Heartbeat / communications LED

The (green) heartbeat / communications LED blinks at a slow, steady rate to indicate the
meter is operational. The LED flashes at a variable, faster rate when the meter is
communicating over a Modbus serial communications port.

You cannot configure this LED for other purposes.

NOTE: A heartbeat LED that remains lit and does not blink (or flash) indicates a possible
hardware problem. Please contact Technical Support.

CAL LED modes

The (orange) CAL LED can be configured for energy pulsing.

When configured for energy pulsing, this LED flashes at a rate proportional to the amount
of energy consumed. This is typically used to verify the meter’s accuracy.

Related topics
• See “Setting up the CAL LED” on page 68 for details on using the front panel to switch
the LED mode for energy pulsing applications.
• See “Configuring the CAL LED for energy pulsing using ION Setup” on page 68 for
details on using ION Setup to switch the LED mode for energy pulsing applications.

© 2017 Schneider Electric. All Rights Reserved. 16

PowerLogic™ EM7230 / EM7280 / EM7290 HRB32898-EN07
Operation 05/2017

Menu Overview
Menu items are displayed below the horizontal line at the bottom of the screen.Figure 4–3
below shows the menu items of the smart demand controller menu hierarchy. Selecting a
Level 1 menu item takes you to the Level 2 menu items. Some Level 2 items have Level 3
items. The navigation buttons work consistently across all menu levels. Press  to scroll
through all menu items on a level.

Figure 4–3: Menu Tree

VAF PWR E

VAF Phase F
Level I
I VLL VLN VAF Phase F

PWR Phase PF
Level II
W VAR VA

Wh VARh VAh PF Ah VLL VLN F

Level III

Timer Dm Dm.ctl
- Cycle

Runh ONh Intr

- To go to previous level
Wdm VARdm VAdm Idm
- To go to next level
VAdm Mx DT Idm Mx DT
- To go to next item in the
list

Wdm Mx DT VARdm Mx DT

Trip Ctrl Cnt

DmPrf THD Harm

L0 L1 L2 L3 L4 L5 L6 L7 L8 L9

Ithd Vthd

DI TOU Max

T1 T2 T3 T4 T5 T6 T7 T8

Pg1 Pg2 MxDm

VLL VLN Wtot VARtot VAdm Idm

VLN Date Time F Date Time VARtot Date Time PF Date Time VARdm Date Time Idm Date Time

VLL Date Time I Date Time Wtot Date Time VAtot Date Time Wdm Date Time VAdm Date Time

Min Unbal Phasor

VLL VLN Wtot VARtot VAtot PF Wdm VARdm VAdm Idm

VLN Date Time F Date Time VARtot Date Time PF Date Time VARdm Date Time Idm Date Time

VLL Date Time I Date Time Wtot Date Time VAtot Date Time Wdm Date Time VAdm Date Time

Unbal %Load

V-I V

Clock Snap Rate

Snap SnpDT

Rate1 Rate2

OldE O.Tmr O.Md

Wh VARh VAh PF Ah VLL VLN F

Runh ONh Intr

Wdt VARdt VAdt Idt

Maint

Reset Setup Diag

17 © 2017 Schneider Electric. All Rights Reserved.

HRB32898-EN07 PowerLogic™ EM7230 / EM7280 / EM7290
05/2017 Operation

Setting Up the Smart Demand Controller

The smart demand controller ships with many default values already set up. To change
values, navigate to the appropriate screen and enter new values. Use the instructions in
the following sections to change values. New values are automatically saved when you
exit the screen and accept the confirmation request.

NOTE: On power up, the meter opens to the same menu page that was last accessed.

Smart Demand Controller Configurations

The smart demand controller supports several power system configurations.

Table 4–2: Wire Sizes and Torque

Wire Strip Screwdriver
Connector Wire Size Torque
Length Type

Auxiliary Power*,
Voltage Inputs* 18-12 0.82-3.31 M3 (Flat
0.28 in. 7 mm
and Control Output AWG mm2 Screwdriver)
Relays*

18-12 0.82-3.31
Current Inputs** ------- ------- PH1 (Cross-slotted)
AWG mm2 4.4-5.3 in lb 0.5-0.6 N.m

22-14 0.33-2.08 M2 (Flat

Digital Inputs* 0.24 in. 6 mm
AWG mm2 Screwdriver)

22-12 0.33-3.31 M3 (Flat

RS-485 0.24 in. 6 mm
AWG mm2 Screwdriver)

*Wire ferrules recommended. Wire ferrule determines stripping length

**Current inputs (CTs) must have U or Ring terminal connections U-Lug Ring-Lug
3.68 ± 0.08
[.14 ± .003] 3.68 ± 0.08 DIA
[.145 ± .003]

6.35 / [.250] MAX 6.35 / [.250] MAX

NOTICE
DAMAGE TO THE DEVICE

•Use only the specified tool for tightening and loosening the screw

•Do not over-torque the screw above the specified range

•The external peripherals must be interfaced to the appropriate connectors in line with the mentioned specifications

Failure to follow these instructions can result in equipment damage

© 2017 Schneider Electric. All Rights Reserved. 18

PowerLogic™ EM7230 / EM7280 / EM7290 HRB32898-EN07
Operation 05/2017

RS-485
CONTROL OUTPUTS (CAT II) VOLTAGE INPUT DIGITAL INPUTS
9$  9 $ 63.5-277 VLN 90$; Whetting
C
9
3G'0 !8/
 '0 ! 8/ 5(6725( 110-480 VLL AUX SUPPLY

+] ', ', &  -
12 1& & 12 1& & 1& 12 & 9     +
9 9 9 91 120 Ω
+]9$
             9:
C

/ 1 - D0 (-)
+ D1 (+)
 


     
I  I  I  I  I  I 

CURRENT INPUTS
$$120P$$9
   
' ' 6+/' *1'
 9

RS-485
D1 = Rx+ , Tx+
D0 = Rx- , Tx- Modbus
0 V* RS-485

NOTE: *Connect both the wires from the second twisted pair on the terminating end to
ensure all the wires are connected.

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

• NEVER bypass external fusing.
• NEVER short the secondary of a PT.
• NEVER open circuit a CT; use the shorting block to short circuit the leads of the CT
before removing the connection from the demand controller.
• Always use grounded external CTs for current inputs.
• Do not use this device for critical control or protection applications where human or
equipment safety relies on the operation of the control circuit.
• Do not open the demand controller.
• Use appropriate fuse for the control output relays.

Failure to follow these instructions will result in death or serious injury.

19 © 2017 Schneider Electric. All Rights Reserved.

HRB32898-EN07 PowerLogic™ EM7230 / EM7280 / EM7290
05/2017 Operation

Figure 4–4: Wiring Diagram Symbols

Symbol Description

Voltage disconnect switch

Fuse

Ground

S1

Current transformer

S2

Potential or voltage transformer

A 500 mA fuses/circuit breaker #

B Shorting block #

C PT primary fuses and

disconnect switch #

Note: # Not supplied

© 2017 Schneider Electric. All Rights Reserved. 20

PowerLogic™ EM7230 / EM7280 / EM7290 HRB32898-EN07
Operation 05/2017

Figure 4–5: 3PH4W (STAR) 3CT 3PT

I I I
I 1+ I 1- I 2+ I 2- I 3+ I 3-

A
B

ac
C

Figure 4–6: 3PH3W (Delta) 2CT 3PT

I I I
I 1+ I 1- I 2+ I 2- I 3+ I 3-

A
B
ac

Figure 4–7: 3PH3W (Open Delta) 2CT 2PT

I I I
I 1+ I 1- I 2+ I 2- I 3+ I 3-

A
B
ac
ac

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HRB32898-EN07 PowerLogic™ EM7230 / EM7280 / EM7290
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Figure 4–8: 2PH3W 2CT 2PT

I I I
I 1+ I 1- I 2+ I 2- I 3+ I 3-

A B

ac
C

Figure 4–9: 1PH2W 1CT

A B
ac

NOTE:

Clearly label the device’s disconnect circuit mechanism and install it within easy reach of
the operator.
L N

AC: 90-277 V L-N ± 10%

DC: 125-250 V ± 20%

If using a control power transformer, fuse both primary and secondary sides of the
transformer. The fuses / circuit breakers must be rated for the installation voltage and
sized for the available fault current. Fuse for neutral terminal is required if the source
neutral connection is not grounded.

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Figure 4–10: Control Output Relays

CONTROL OUTPUTS (CAT II)

9$  9 $
3G'0 !8/
 '0 ! 8/ 5(6725(
12 1& & 12 1& & 1& 12 &

        

* SQ
~* SQ
~* SQ
~

To Load To incomer To Load and

CB Trip CB Trip incomer CB
coil coil Re-closing
coil

LOAD FULL RESTORE

SHED SHUT DOWN
SQ = Spark Quencher

~ = ac 240v (or 110v)

CONTROL OUTPUTS (CAT II)

9$  9 $
3G'0 !8/
 '0 ! 8/ 5(6725(
12 1& & 12 1& & 1& 12 &

        

~
* * SQ
*

Annunciation To incomer Annunciation

Lamp (Red) CB Trip Lamp (Green)
coil

LOAD FULL RESTORE

SHED SHUT DOWN

NO C NO C

*
24V
dc * SQ
24V
dc
Normal
Off Load ~ Normal
ON Load

Auxiliary control
contactor

Annunciation To Circuit NO C NC
Lamp breaker coil

Relay Schematic Diagram

Note:

The Control Output Relays diagram is for illustration purpose only, configuration may change based on the field condition.

It is recommended to connect spark quencher of appropriate rating across relay terminals.

* The overcurrent protective device must be rated for the short-circuit current at the connection point.

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Figure 4–11: Status Digital Input Connections

DI1 DI2 -/C + DI1 DI2 -/C +
Whetting voltage
40 42 57 56 40 42 57 56

18-36 Vdc

18-36 Vdc

Wiring with External Voltage Wiring with Whetting Voltage

© 2017 Schneider Electric. All Rights Reserved. 24

PowerLogic™ EM7230 / EM7280 / EM7290 HRB32898-EN07
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Smart Demand Controller Basic Setup

To begin smart demand controller basic setup:

1. Scroll to [Maint] in the menu list.

2. Press [Maint].
3. Press [Setup].
4. Enter your setup password.
NOTE: The default password is 0000. See “” on page 29 for information on changing
passwords.
5. Press [Meter].The Basic Setup screen appears.

Use the directions in the following sections to set up basic smart demand controller
values.

Setting Up CT Options
The CT Primary and Secondary are set in Amps (A).

To set up CTs:

1. Press ▼ to select CT Primary (A),

then press [Edit].
2. Press + to increment the active
digit through the numerals 0-9.
3. Press  to enter the selected
value for the active digit and move
to the next digit to the left.
4. Continue until all values are
selected, then press [OK] to enter
the CT Primary.
5. Press ▼ to select CT Secondary
(A), then press [Edit].
6. Press + and - to scroll through a
list of CT Secondary options.
NOTE: CT Secondary options are
5A or 1A. See “Technical
Specification” on page 10 for
accuracy level.
7. Press [OK] to select the CT
Secondary.

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HRB32898-EN07 PowerLogic™ EM7230 / EM7280 / EM7290
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Setting Up PT (VT) Options

The PT Primary and Secondary are set in Volts (V).

To set up PTs:

1. Press ▼ to select PT Primary,

then press [Edit].
2. Press + to increment the active
digit through the numerals 0-9.
3. Press  to enter the selected
value for the active digit and move
to the next digit to the left.
4. Continue until all values are
selected, then press [OK] to enter
the PT Primary.
5. Press ▼ to select PT Secondary,
then press [Edit].
6. Press + to increment the active
digit through the numerals 0-9.
7. Press [OK] to select the CT
Secondary.

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Setting Up the Starting Current and System Configuration

To set up the system configuration and start current:

1. Press ▼ to select Start

Current, then press [Edit].
2. Press + to increment the active
digit through the numerals 0-9.
3. Press  to enter the selected
value for the active digit and
move to the next digit to the left.
4. Continue until all values are
selected, then press [OK] to
enter the Start Current.
5. Press ▲to select system
configuration, then press [Edit].
6. Press + and - to scroll between
Star, Delta, 2-phase and Single
phase.
7. Press [OK] to select the system
configuration.

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Setting Up the PF Standard

To set up the PF Standard:
1. Press ▼ to select PF
Standard, then press [Edit].
2. Press + and - to scroll between
IEC and IEEE.
3. Press [OK] to select the PF
Standard.

The smart demand controller enables the user to select a VA calculation method between
3d (default) and arithmetic through setup. The VA calculation methods are explained in
the following table.

Table 4–3: VA calculation method

VA function display
Formula Other Names Suited applications
in setup

U, Apparent, Vectors
3d (default) Best All round

Arithmetic Good under low

Arth
unbalance

Setting Up the PF Lock

Internationally, capacitive loading is permitted, to varying extents, in tariff metering. This is
done by locking the accumulation of selected energy parameters, while the load power is
capacitive. The EM72xx smart demand controller handles this situation with power factor
(PF) lock.

In Main>Setup, PF Lock = 0 by default. The different levels and their effects are
explained below. The levels can be changed using the partial-setup procedure.

The locking levels and their effects are:

0 = No lock.
1 = kVARh is locked.
2 = kVARh and kVAh are locked.
3 = kVARh, kVAh and DM (kVA) are locked.

If the smart demand controller is not connected with tariff related measurements, then a
lock level of 0 is recommended. In tariff related applications, the local electricity supply
authority will provide the current regulations.

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With reference to the four quadrant polarities, the effect of locking on each of the above
parameters is,

• kVARh is accumulated only for quadrant Q1 and Q3.

• KVAh: kVA is clamped to kW (whereas normally kVA > kW) while the system is in Q4
or Q2, for accumulating kVAh.
• kVA demand (DM): The locked kVA as above is used for demand computation while
in Q4. Note that Q2 is not processed here, since demand computation is already
locked for reverse flow (Q2 and Q3) whether D.PAR is kW or kVA. This lock is not
meaningful, when the D.PAR is kW.
NOTE:

Locking has no effect on the computation or display of instantaneous parameters. It

affects only the computation and display of integrated parameters. Q2 and Q3 energy
parameters are also available by default as the product works for both IE modes.

For PF lock, navigate Main>Setup>PF Lock. If the Locking Level is re-programmed, the
smart demand controller will re-compute kVARh and kVAh according to the new locking
level. In the smart demand controller, adding or removing lock level 3 will take 1 to 30
minutes (d.Prd) for demand to approach its new locked value, and should not be done
during critical demand peaks. Maximum demand (MD) is not re-adjusted.

To set up the PF Lock:

1. Press ▼ to select PF Lock,

then press [Edit].
2. Press + and - to scroll between
VARh, VARh+VAh, VARh+VAh
+VAdm and None.
3. Press [OK] to select the PF
Lock.

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Smart Demand Controller Password Setup

The password to setup and reset are configurable. Passwords must use four numeric
characters. The characters are from the US ASCII character set and are not translated or
affected by language selection.

To set up a password:

1. Scroll to [Maint] in the menu list.

2. Press [Maint].
3. Press [Setup].
4. Enter your setup password.
NOTE: The default password is
0000.
5. Press ▼ and ▲ to scroll
through the options in the
Passwords screen.
6. Press [Edit] to select a
password.
7. Press + to increment the active
digit through the numerals 0-9.
8. Press  to enter the selected
value for the active digit and
move to the next digit to the left.
9. Continue until all values are
selected, then press [OK] to set
the password.

Smart Demand Controller - Demand Setup

To begin smart demand controller demand setup:

1. Scroll to [Maint] in the menu list.

2. Press [Maint].
3. Press [Setup].
4. Enter your setup password.
NOTE: The default password is 0000.See “” on page 29 for information on changing
passwords.
5. Scroll to [Dm].

Use the directions in the following sections to set up smart demand controller demand
values.

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Setting Up Demand
To set up the demand:

1. Press ▼ and ▲ to scroll

between the Demand options.
2. Press [Edit] to select a period.
3. Press + to increment the active
digit through the numerals 0-9.
4. Press [OK] to select the
Demand Period.
5. Press ▼ to select Demand
Method, then press [Edit].
6. Press + and - to scroll through a
list of supported demand
methods.
7. Press [OK] to select the
demand method.
8. Press ▼ to select Demand
Control Parameter, then press
[Edit].
9. Press + and - to scroll through
the list of demand control
parameters.
10. Press [OK] to select the
demand control parameter.
11. Press ▼ to select Profile
Demand Interval, then press
[Edit].
12. Press + to increment the active
value.
13. Press [OK] to select the profile
demand interval.

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14. Press ▼ to select Essential

Load, then press [Edit].
15. Press + to increment the active
digit through the numerals 0-9.
16. Press  to enter the selected
number for the active digit and
move to the next digit to the left.
17. Continue until all values are
selected, then press [OK] to
enter the Essential load.
18. Press ▼ to select Demand
Profile L0, then press [Edit].
19. Press + to increment the active
digit through the numerals 0-9.
20. Press  to enter the selected
number for the active digit and
move to the next digit to the left.
21. Continue until all values are
selected, then press [OK] to
enter the Demand Profile L0.
22. Press ▼to select Demand
Profile Step, then press [Edit].
23. Press + to increment the active
digit through the numerals 0-9.
24. Press  to enter the selected
number for the active digit and
move to the next digit to the left.
25. Press [OK] to select the
Demand Profile Step.
26. Press ▼ to select Demand UL,
then press [Edit].
27. Press + to increment the active
digit through the numerals 0-9.
28. Press  to enter the selected
number for the active digit and
move to the next digit to the left.
29. Press [OK] to select the
demand UL.
30. Press ▼ to select Demand LL,
then press [Edit].
31. Press + to increment the active
digit through the numerals 0-9.
32. Press  to enter the selected
number for the active digit and
move to the next digit to the left.
33. Press [OK] to select the
demand LL.

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34. Press ▲ to return to the

previous screen.
NOTE: If existing associations
will be lost by making the new
selection, a confirmation screen
appears.
— Press [Yes] to accept the
changes and return to the
previous screen.
— Press [No] to keep the
existing configuration and
return to the previous
screen.

NOTE:
• In front display, if you change the CT PT ratio and sys configuration, then the entire
demand upper limit and lower limit values will change according to the full scale value
and also, these parameters values will change; Essential load, Profile L0 value, Profile
Step, Upper limit, and Lower limit.
— If you change the demand control parameter (for example, from VA to A), then
ensure to edit these parameters: Essential load,Profile L0 value, Profile Step,
Upper limit, and Lower limit.
— Press OK to reach the maximum value of the above parameters.
• In communication, while writing through communication ensure the below listed
parameter values must be within the specified range.
Parameter Description Range

Essential load allows for critical loads like

Numerically Controlled Machines, which
cannot be included in the load shedding
exercise. The Demand Controller ensures 0 to 99% of Lower
that this Essential Load will be allowed to run Limit value of
Essential Load
with minimum interference. Typically, EsLD Demand
should be below 10% of Upper Limit.
Programming a high value will unnecessarily
advance the load Shed action to protect the
large Essential Load.
Level 0 is the Demand Profile mid band with
levels L1 to L9 above and L - 1 to L - 9 below,
separated by the step size.
Profile L0 value When changing the demand values in Dm 10% to 99% of Full
scale value
setup, the demand page values will not reset
if you change the Profile L0 value, and Profile
Step.
Profile Step sets the spacing of the profile 1% to 5% of Profile
Profile Step L0 value
levels.

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Parameter Description Range

When the load peaks are more than twice the

Upper Limit (UL), then the Demand Control
Trip Point will be slightly above the UL due to
the 15 Second Demand Control cycle. UL
should be set around
Upper limit 90% of contract Demand to start with. The UL 1 to 100% of Full
scale value)
setting is used only for Demand Profile
generation.
The Min-Max value depends upon the CT
and PT ratio. The maximum value of Energy
UL can be set up to 649 MW/MVA/MVAR.
Demand Control Lower Limit (LL) should be
set roughly to 90% of UL. This determines
the point for restoration of loads.
Lower limit 10 to 99% of Upper
NOTE: The closer LL is to UL, the more frequent will be limit value
the load shedding cycles, but the loads shed are likely to
be smaller. This suits plants comprising several small
loads. If on the other hand you have a few large loads,
increase the spacing of LL below UL suitably.

• Power Full scale value = (PT Primary x CT Primary x Sys Config) / 1.732
• Amps Full scale value = CT Primary
NOTE: When a user changes the Demand Upper Limit (UL) and Lower Limit (LL) values
in Demand setup or TOU setup page the change will take effect at the end of immediate
Dm Interval Period (DIP) of that hour (or) the following tariff, in case of TOU based Dm
Control. This will happen in sequence of whichever is earlier.

Smart Demand Controller Communication Setup

To begin smart demand controller communication setup:

1. Scroll to [Maint] in the menu list.

2. Press [Maint].
3. Press [Setup].
4. Enter your setup password.
NOTE: The default password is 0000. See “” on page 29 for information on changing
passwords.
5. Press [Comm]. The Communication Setup screen appears.

Use the directions in the following sections to set up smart demand controller
communications values.

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PowerLogic™ EM7230 / EM7280 / EM7290 HRB32898-EN07
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Setting Up Communications
To set up communications:

1. Press ▼ to select Baud Rate,

then press [Edit].
2. Press + and - to scroll through
the Baud Rate options.
3. Press [OK] to set the Baud rate.
4. Press ▼ to select Parity, then
press [Edit].
5. Press + and - to scroll through
the Parity options.
6. Press [OK] to set the Parity.
7. Press ▲ to select Address,
then press [Edit].
8. Press + to increment the active
digit through the numerals 0-9.
9. Press  to enter the selected
number for the active digit and
move to the next digit to the left.
10. Press [OK] to set the Address.

Smart Demand Controller HMI Setup

To begin smart demand controller HMI setup:

1. Scroll to [Maint] in the menu list.

2. Press [Maint].
3. Press [Setup].
4. Enter your setup password.
NOTE: The default password is 0000. See “” on page 29 for information on changing
passwords.
5. Press [HMI]. The HMI Setup screen appears.

Use the directions in the following sections to set up smart demand controller HMI values.

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Setting Up the HMI

To set up the HMI:

1. Press [HMI]. The HMI screen

appears.
2. Press [Edit] to select Contrast.
3. Press + to increment the active
digit through the numerals 0-9.
NOTE: The contrast values
range between 1 and 9.
4. Press  to enter the selected
value for the active digit and
move to the next digit to the left.
5. Press [OK] to set the contrast.
6. Press ▼to select Backlight
Timeout, then press [Edit].
7. Press + to increment the active
digit through the numerals 0-9.
NOTE: The backlight timeout
values range between 0 and 60
minutes. 0 disables the timeout.
8. Press  to enter the selected
value for the active digit and
move to the next digit to the left.
9. Continue until all values are
selected, then press [OK] to set
the backlight timeout.
10. Press ▲ to return to the
previous screen.
NOTE: If existing associations
will be lost by making the new
selection, a confirmation screen
appears.
— Press [Yes] to accept the
changes and return to the
previous screen.
— Press [No] to keep the
existing configuration and
return to the previous
screen.

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Smart Demand Controller Clock Setup

To begin smart demand controller clock setup:

1. Scroll to [Maint] in the menu list.

2. Press [Maint].
3. Press [Setup].
4. Enter your setup password.
NOTE: The default password is 0000. See “” on page 29 for information on changing
passwords.
5. Press [Clock]. The Clock setup screen appears.

Use the directions in the following sections to set up smart demand controller clock
values.

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Setting Up the Clock

The smart demand controller stores all date and time stamps in GMT.
To set up the clock:

1. Press [Edit] to select the date.

2. Press + to increment the active
digit for the first character of the
date.
3. Press  to enter the selected
character and move to the
character to the left.
4. Continue until all values are
selected, then press [OK] to set
the date.
NOTE: If existing associations
will be lost by making the new
selection, a confirmation screen
appears.
— Press [Yes] to accept the
changes and return to the
previous screen.
— Press [No] to keep the
existing configuration and
return to the previous
screen.
5. Press ▼to select Time, then
press [Edit].
6. Press + to increment the active
digit for the first character of the
date.
7. Press  to enter the selected
character and move to the
character to the left.
8. Continue until all values are
selected, then press [OK] to set
the time.
NOTE: If existing associations
will be lost by making the new
selection, a confirmation screen
appears.
— Press [Yes] to accept the
changes and return to the
previous screen.
— Press [No] to keep the
existing configuration and
return to the previous
screen.
9. Press ▲ to return to the
previous screen.

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PowerLogic™ EM7230 / EM7280 / EM7290 HRB32898-EN07
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Smart Demand Controller - Auto Reset

Auto reset feature enables the user to reset or clear the INTEG (accumulated values) and
Max demand to zero on a pre-programmed date and month. The existing values are
stored in the OLD register and the new values are accumulated in the INTEG.

To begin smart demand controller Auto Reset:

1. Scroll to [Maint] in the menu list.

2. Press [Maint].
3. Press [Setup].
4. Enter your setup password.
NOTE: The default password is 0000. See “” on page 29 for information on changing
passwords.
5. Press [A. Rst]. The Auto Reset screen appears.

Use the directions in the following sections to reset the smart demand controller Auto
Reset values.

39 © 2017 Schneider Electric. All Rights Reserved.

HRB32898-EN07 PowerLogic™ EM7230 / EM7280 / EM7290
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Setting Up Auto Reset

The smart demand controller resets.
To set up the auto reset:

1. Press [Edit] to select the date.

2. Press + to increment the active
digit for the first character of the
date.
3. Press  to enter the selected
character and move to the
character to the left.
4. Continue until all values are
selected, then press [OK] to set
the date.
NOTE: Repeat the above steps
from step 1 to step 4 to auto
reset the other date and month
values.
5. Press ▲ to return to the
previous screen.
NOTE: The date and month
order should be set as per the
month ascending order. For
example, the order must be set
as 12/Jan, 12/Feb; do not set
as 12/Feb, 12/Jan.
NOTE: The meter allows Auto
Reset of all INTEG parameters
along with Max Demand, Relay
Counters, Accumulated Energy,
Quadrant Reactive Energy
(VARh), and Rate Counters
values at the specified date and
month.

Time Of Use (TOU)

TOU Demand Upper & Lower settings can be set through front panel keys. TOU schedule
configuration can be done only through ION setup.

The time of use (TOU) is a structure where the energy consumption (kVAh, kWh, kVARh)
at different time intervals (user-programmable) can be stored in separate registers. TOU
is very useful where the power tariff changes with time of consumption.

TOU helps the power utility company to optimize the consumption, throughout the day
and night. Due to higher rates at peak hours and lower rates at off peak hours the
consumers will try to reschedule their processes to off peak hours to reduce the power
costs. This in turn helps the utility to reduce the overload at peak hours and the wastage
of power during the off peak hours.

NOTE: Use ION E setup to configure the software. You can download the software from
www.schneider-electric.com.

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Smart Demand Controller - TOU

To begin smart demand controller Time of Use (TOU):

1. Scroll to [Maint] in the menu list.

2. Press [Maint].
3. Press [Setup].
4. Enter your setup password.
NOTE: The default password is 0000. See “” on page 29 for information on changing
passwords.
5. Press [TOU]. The TOU DM Setup screen appears.

Use the directions in the following sections to reset the smart demand controller TOU
values.

TOU Setting and Configuration

Table 4–4: Yearly Settings
Year (12 months) January to December ( 1 to 12)

No of Seasons (6) Season1/Season2/Season3/Season4/Season5/Season6 (start date)

Weekday / Weekday schedule & Weekday schedule & Weekday schedule &
weekend Tariff configuration Tariff configuration Tariff configuration

Sub DM DM Sub DM DM Sub DM DM

Time Time Time
Integ UL LL Integ UL LL Integ UL LL

Slot1 start time

Slot2 start time

Slot3 start time

Slot4 start time

Slot5 start time

Slot6 start time

Slot7 start time

Slot8 start time

Table 4–5: Season Settings

Number of Seasons 1 to 6 INT16U

Season1 start date and time Date and Time Date Time Format

Season2 start date and time Date and Time Date Time Format

Season3 start date and time Date and Time Date Time Format

Season4 start date and time Date and Time Date Time Format

Season5 start date and time Date and Time Date Time Format

Season6 start date and time Date and Time Date Time Format

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Table 4–6: Weekend Settings

Weekend Settings Day Remarks

Can configure any day as

Weekend1 in Season1 1 to 7
weekend

Can configure any day as

Weekend2 in Season1 1 to 7
weekend

Can configure any day as

Weekend3 in Season1 1 to 7
weekend

Can configure any day as

Weekend1 in Season2 1 to 7
weekend

Can configure any day as

Weekend2 in Season2 1 to 7
weekend

Can configure any day as

Weekend3 in Season2 1 to 7
weekend

Can configure any day as

Weekend1 in Season3 1 to 7
weekend

Can configure any day as

Weekend2 in Season3 1 to 7
weekend

Can configure any day as

Weekend3 in Season3 1 to 7
weekend

Can configure any day as

Weekend1 in Season4 1 to 7
weekend

Can configure any day as

Weekend2 in Season4 1 to 7
weekend

Can configure any day as

Weekend3 in Season4 1 to 7
weekend

Can configure any day as

Weekend1 in Season5 1 to 7
weekend

Can configure any day as

Weekend2 in Season5 1 to 7
weekend

Can configure any day as

Weekend3 in Season5 1 to 7
weekend

Can configure any day as

Weekend1 in Season6 1 to 7
weekend

Can configure any day as

Weekend2 in Season6 1 to 7
weekend

Can configure any day as

Weekend3 in Season6 1 to 7
weekend

Table 4–7: Holiday Configuration

Public Holiday configuration

Holiday 1 to 16 Month and Day

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PowerLogic™ EM7230 / EM7280 / EM7290 HRB32898-EN07
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Setting Up TOU
The smart demand controller Time of Use (TOU).

To set up the TOU:

1. Press [S1] to select the TOU slot.

2. Press [WD] to set the Weekday slot.
3. Press ▼to select weekday slot, then
press [Edit].
4. Press + to increment the active digit
through the numerals 0-9.
5. Press  to enter the selected
character and move to the character
to the left.
6. Continue until all values are selected,
then press [OK] to set the slot.
NOTE: Repeat the above steps from
step 3 to step 6 to set the other WD
values.
7. Press ▲ to return to the previous
screen.
NOTE: If existing associations will be
lost by making the new selection, a
confirmation screen appears.
— Press [Yes] to accept the changes
and return to the previous screen.
— Press [No] to keep the existing
configuration and return to the
previous screen.
8. Press [No] to keep the existing
configuration and return to the
previous screen.
Press [WE] to set the Weekend slot.
9. Press ▼to select weekend slot, then
press [Edit].
10. Press + to increment the active digit
through the numerals 0-9.
11. Press  to enter the selected
character and move to the character
to the left.
12. Continue until all values are selected,
then press [OK] to set the slot.
NOTE: Repeat the above steps from
step 9 to step 12 to set the other
values of WD.
13. Press ▲ to return to the previous
screen.

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NOTE: If existing associations

will be lost by making the new
selection, a confirmation screen
appears.
— Press [Yes] to accept the
changes and return to the
previous screen.
— Press [No] to keep the
existing configuration and
return to the previous
screen.
14. Press [HD] to set the Holiday
slot.
15. Press ▼to select holiday slot,
then press [Edit].
16. Press + to increment the active
digit through the numerals 0-9.
17. Press  to enter the selected
character and move to the
character to the left.
18. Continue until all values are
selected, then press [OK] to set
the slot.
NOTE: Repeat the above steps
from step 15 to step 18 to set
the other values of WD.
19. Press ▲ to return to the
previous screen.
NOTE: If existing associations
will be lost by making the new
selection, a confirmation screen
appears.
— Press [Yes] to accept the
changes and return to the
previous screen.
— Press [No] to keep the
existing configuration and
return to the previous
screen.

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SnapShot
The meter supports recording of instantaneous values through snap shot using HMI. This
page enables capturing values of Voltage Average, Current Average, Power Total, and
Energy Delivered. The time of recording is defined by the time set for the snap shot
feature. This can be set using HMI or communication. Snapshot feature is aligned with the
RTC of the meter.

NOTE: In certain conditions where the time is skipped due to RTC behaviour, the
recording of that respective day will be skipped and successive days records will be
available.

Smart Demand Controller - SnapShot

To begin smart demand controller SnapShot:

1. Scroll to [Maint] in the menu list.

2. Press [Maint].
3. Press [Setup].
4. Enter your setup password.
NOTE: The default password is 0000. See “” on page 29 for information on changing
passwords.
5. Press [Snap]. The SnapShot Setup screen appears.

Use the directions in the following sections to reset the smart demand controller snapshot
time.

Viewing SnapShot Page

The smart demand controller SnapShot.

To view SnapShot page:

1. Press  to navigate to Snap.

2. Press Snap to view parameter
values. Snap page displays
below parameters:
— Voltage Average
— Current Average
— Power Total
— Energy Delivered
3. Press SnpDT to view SnapShot
date and time.

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Setting Up SnapShot
The smart demand controller SnapShot.

To set up the SnapShot:

1. Press [Edit] to select the

SnapShot time.
2. Press + to increment the active
digit through the numerals 0-9.
3. Press  to enter the selected
character and move to the
character to the left.
4. Continue until all values are
selected, then press [OK] to set
the time.
— Press [Yes] to accept the
changes and return to the
previous screen.
— Press [No] to keep the
existing configuration and
return to the previous
screen.

Rate Counter
Rate counters enable tracking of CO2 emissions based on the Energy Delivered /
Received. A predefined calculation can determine the CO2 Emission and Energy Cost for
each customer. This feature enables two Rate Settings.

Smart Demand Controller - Rate

To begin smart demand controller Rate:

1. Scroll to [Maint] in the menu list.

2. Press [Maint].
3. Press [Setup].
4. Enter your setup password.
NOTE: The default password is 0000. See “” on page 29 for information on changing
passwords.
5. Press [Rate]. The Rate Setup screen appears.

Use the directions in the following sections to reset the smart demand controller Rate
parameters.

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Viewing Rate Page

The smart demand controller Rate.

To view rate

page:

1. Press  to navigate to Rate.

2. Press Rate1 to view rate1
parameter values.
3. Press Rate2 to view rate2
parameter values.

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Setting Up Rate
The smart demand controller Rate.

To set up the Rate:

1. Press [Edit] to select Rate1. Or

press ▼to select Rate 2 and
press [Edit].
2. Press ▼to select Channel and
press [Edit].
3. Press + and - to scroll through
the Channel parameters.
— None
— Active Del
— Active Rec
— Active Del + Rec
— Reactive Del
— Reactive Rec
— Reactive Del + Rec
— Apparent Del
— Apparent Rec
— Apparent Del + Rec
4. Press [OK] to set the required
parameter.
5. Press ▲ to return to the
previous screen.
6. Press ▼to select Factor per
(k_h) and press [Edit].
— Configurable from 0.000 to
9999.999.
7. Press + to increment the active
digit through the numerals 0-9.
8. Press  to enter the selected
character and move to the
character to the left.
9. Continue until all values are
selected, then press [OK] to set
the parameter value.
10. Press ▲ to return to the
previous screen.
— Press [Yes] to accept the
changes and return to the
previous screen.
— Press [No] to keep the
existing configuration and
return to the previous
screen.
NOTE: Label can be configured
only through ION Setup.

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Smart Demand Controller Diagnostics

Diagnostics
To check the smart demand controller diagnostics.

1. Scroll to [Maint] in the menu list.

2. Press [Maint].
3. Press [Diag], the Diagnostics
screen appears.
4. Press ▲to return to the
previous screen.
NOTE: Interruptions display the number of
supply outages. This indicates the number of
auxiliary supply interruptions. The fail date
and time display the last time an interruption
occurred.

Smart Demand Controller Reset

To begin smart demand controller reset setup:

1. Scroll to [Maint] in the menu list.

2. Press [Maint].
3. Press [Reset].
4. Enter your setup password. The default password is 0000.
5. The Resets screen appears.

Meter values can be re-initialized using the reset function. Use the directions in the
following sections to set up smart demand controller reset values.

Resets
Resets include smart demand controller re-initialization, as well as resets of all values for
the following items:
• Energy - Clears all values for Energy, Quadrant VARh, and Rate Counters
• Max Demand - Clears all values for Max Demand and Relay Counters
• Max Min - Clears all values for Max Min
• TOU - Clears all values for TOU
• DM Profile - Clears all values for DM Profile
• DM Sync - Clears all values for Demand

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Reset
To re-initialize the smart demand
controller:

1. Press [Select] to select Energy.

2. A confirmation screen appears.
— Press [Yes] to reset the
energy.
— Press [No] to return to the
previous screen.
3. Press ▼to select Max
Demand, then press [Select].
4. A confirmation screen appears.
— Press [Yes] to reset the
maximum demand.
— Press [No] to return to the
previous screen.
5. Press ▼to select Max Min,
then press [Select].
6. A confirmation screen appears.
— Press [Yes] to reset the
maximum minimum.
— Press [No] to return to the
previous screen.
7. Press ▼to select TOU, then
press [Select].
8. A confirmation screen appears.
— Press [Yes] to reset the
TOU.
— Press [No] to return to the
previous screen.
9. Press ▼to select DM Profile,
then press [Select].
10. A confirmation screen appears.
— Press [Yes] to reset the DM
profile.
— Press [No] to return to the
previous screen.
11. Press ▼to select DM Sync,
then press [Select].
12. A confirmation screen appears.
— Press [Yes] to reset the DM
sync.
— Press [No] to return to the
previous screen.

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Chapter 5—Metering

Smart Demand Controller Characteristics

The smart demand controller offers comprehensive power and energy monitoring at the
feeders and individual loads.The smart demand controller replaces over 20 individual
transducers and meters for comprehensive load management in 3-phase commercial and
industrial applications.

Table 5–1: Smart Demand Controller Characteristics

Instantaneous rms Values
Current Per phase, neutral or ground, average of 3 phases
Voltage Average of 3 phases, L-L and L-N
Frequency System Frequency
Active power Total and per phase (signed)
Reactive power Total and per phase (signed)
power Total and per phase
True Power Factor Total and per phase 0.000 to 1 (signed, four quadrant)
Energy Values (Forward, Reverse, F+R, F-R) and Previous (Old) Energy Readings
Active energy
Reactive energy
energy
PF Average
Amp Hour
VLL Average
VLN Average
Frequency Average
Timers
Run Hours Load ON hours
On Hours Voltage ON hours
Interruptions Voltage interruptions
Demand Values
Active, reactive, power Present, Last, Predictive Demand values
Current Present, Last, Predictive Demand values
Spare Load
Time Remaining
Maximum Demand Values
Maximum demand active power Total
Maximum demand power Total
Maximum demand reactive power Total
Maximum demand current Average
Maximum demand current occurrence For all the maximum demand parameters
date and time
Demand Control
Trip Status Indicates the trip status (Shed, Restore, Dm > UL, PdDm > UL)
Demand Profile
Demand Profiles 19 levels of demand profiles on selected parameters (W / VA / Amps)
Power-Quality Values
Total harmonic distortion (THD) Current THD
Voltage VLN THD (if SYS configuration is Star/2ph/1ph)
Voltage VLL THD (if SYS configuration is Delta)
Individual Harmonic Current THD
(Upto 31st level) Voltage VLN THD (if SYS configuration is Star/2ph/1ph)
Voltage VLL THD (if SYS configuration is Delta)

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Table 5–1: Smart Demand Controller Characteristics

Reset (Password protected)
Energy values
Maximum demand current and power values
Minimum and maximum values
TOU page values
Demand Profile values
Demand Sync (for clearing demand values)
Minimum and Maximum Values (4 levels) with time stamp
Current avg
Voltage line to line avg
Voltage Line to neutral
Active power total
Reactive power total
Power total
Power factor
Frequency
Other Parameters
Unbalance Displays Voltage and Current
% Load Phase wise and Average
Phase angle Phase angles between voltage and current
Phase angle between voltage and voltage
Clock Real time clock (RTC)
Local or Remote Setup
Distribution system Type STAR, DELTA, 2-Phase and Single Phase
Current transformers rating Primary 5 to 32,767 A
Secondary 5 A, 1 A
Voltage transformers rating Primary 100 to 999,000 VLL max
Secondary 50 to 480 VLL
Demand calculation interval (period) 1 to 30 minutes
Diagnostics
Control Power interruptions
Control Power Last Fail Date and Time

MODBUS RS-485
Table 5–2: Modbus RS-485 Specifications
Functions
RS-485 link 2-wire
Communication protocol MODBUS RTU
Settings
Communication address 1 to 247
Baud rate (communication speed) 4800, 9600, 19200, 38400 baud
Parity none, even, odd

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Digital Inputs
Table 5–3: Digital Inputs Status
Digital input status 2 digital inputs, Display Status is indicated ON or OFF

Relay Outputs
The meter provides 3 output relays with change-over contacts for demand control. While
the relays are in use, you may find the meter:

a.) wired to a local annunciator panel

b.) extended to remote annunciators, or

c.) used for automatic tripping via control contactors wired to a circuit breaker

Table 5–4: Relay Counters and Description

Counter
Relay Counter Status Description
Increment
Restore Off -> ON No Indicates that loads may now be restored. Additional
load allowed, is shown by SprLD (+ve).
On -> Off Yes
DM > UL Off -> On Yes When the actual (present) load crosses the set Upper
Limit.
On -> Off No
PdDM > UL Off -> On Yes Indicates that demand is predicted to exceed Upper
On -> Off No Limit (UL) within programmed Prediction Interval (PdIN).
Load Shedding by the amount shown by SprLD (-ve) is
necessary to keep demand within the programmed
Upper Limit (UL). Alternatively, transfer excess load to
an in-house generator. The Prediction Interval (PdIN)
provides valuable advance notice for this operation.
Shed NA NA Indicates that load shedding is required. This indications
occurs only on HMI.

You can also use ION Setup for configuring Relay Counters on your meter. For additional
information refer to Ion Setup Configuration Guide available on www.schneider-
electric.com.

Minimum/Maximum Values for Real-Time Readings

When any one-second real-time reading reaches its highest or lowest value, the smart
demand controller saves the values in its nonvolatile memory. These values are called
the minimum and maximum (min/max) values.

From the smart demand controller display you can:

• View all min/max values since the last reset and the reset date and time. See Table 5–
1 for a list of the minimum and maximum values stored in the demand controller.
• Reset min/max values.

All running min/max values are arithmetic minimum and maximum values. For example,
the minimum phase A–B voltage is the lowest value in the range 0 to 99 kV that has
occurred since the min/max values were last reset.

Minimum/Maximum Profile
The min/max profile records the high and low values for VA, W, VAR, PF, VLL,VLN, I, F,
and Demand (VA, W, VAR, I). The min and max values levels are from L1 to L4. The
trend of the one second RMS value of the appropriate parameter is examined for

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maximum (peaks) and minima’s (troughs). Lead/Lag and Import/Export polarity is

ignored, even if you have not ordered the IE Option. This allows you to make easy
magnitude comparisons. For the F profile, the average frequency over 20 cycles is used.

When the values are high, it is possible that there will be minima’s recorded when the
values were low. Therefore, it is possible that the L4(max) reading is less than that of the
L4(min) reading. Once the profile is cleared, the profile starts with all zeros. Normally L1
(max) and L1(min) are the first to receive the entries. The other values continue to get
recorded as and when the trend shows maximum and minima’s. The L2(max), L4(max),
L4(min), L3(min), and L1(min) values show zero until sufficient highs and lows have been
detected. A minimum of one hour is required for all the maximum and minimum of the
profile to receive entries. The smart demand controller forces a minimum gap of 15
minutes between any maximum or minimum of the same parameter, to prevent sudden
filling up of noise in the profile. Since the internal resolution of the profile is greater than
that of the display, two maximum events or two minimum events will appear when the
values are steady. However, the later event replaces the earlier one.

Figure 5–12: Minimum/Maximum

Demand Readings
The smart demand controller provides a variety of demand readings. Table 5–5 lists the
available demand readings and their reportable ranges.

Table 5–5: Demand Readings

Demand Readings
Demand Current, Average (VA, W,VAR, Amps)
Present
Last
Predicted
Peak
Spare Load
Time Remaining

Demand Calculation Methods

Demand power is the energy accumulated during a specified period divided by the length
of that period. How the smart demand controller performs this calculation depends on the
method you select. To be compatible with electric utility billing practices, the smart
demand controller provides Block Interval Demand power calculations.

The default demand calculation is set to a User & RTC Block with a 15 minute interval.

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Block Interval Demand

In the block interval demand method, you select a “block” of time that the demand
controller uses for the demand calculation. You choose how the demand controller
handles that block of time (interval). Two different modes are possible:

• Auto (Sliding) Block. Select an interval from 1 to 30 minutes (in 1-minute

increments). The value is updated every 15 seconds irrespective of demand period
programmed.The demand controller displays the demand value for the last completed
interval.
• User & RTC (Fixed) Block. Select an interval from 1 to 30 minutes (in 1-minute
increments). The demand controller calculates and updates the demand at the end of
each interval.

Figure 4-7 illustrates the two ways to calculate demand controller using the block method.
For illustration purposes, the interval is set to 15 minutes.

Figure 5–13: Block Interval Demand Examples

Predicted Demand
The smart demand controller calculates predicted demand for the end of the present
interval for kW / kVA / Amp demand. This prediction takes into account the energy
consumption thus far within the present (partial) interval and the present rate of
consumption. The prediction is updated every second.

Max Demand
In nonvolatile memory, the smart demand controller maintains a running maximum of
power and current demand values, called “Max Demand” The Max is the highest /
average for each of these readings: Wdm, VARdm, VAdm & Idm, since the last reset. The

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smart demand controller stores the date and time when the max demand occurred, as
well as the max demand during the last incremental energy interval.

You can view the old max demand values from the demand controller display, and old
max demand occurrence date and time with respect to W, VAR, VA and I. To view the old
demand values, select O.Md.

To reset Max Demand values from the demand controller display, navigate through Maint
> Reset > Password > Max Demand.

To reset all demand values from the demand controller display, navigate through Maint >
Reset > Password > Demand sync.

You should reset max demand after changes to basic demand controller setup, such as
CT ratio or power system configuration.

Demand Profiles
The demand profile provides the cumulative frequency histogram of demand values. The
profile generates nine levels above and below the programmed level 0, at the spacing
programmed by the step size in the setup menu.

At every demand interval (choices 1 to 30 minutes), the highest demand value in the
interval is compared with the 19 Levels. A count of levels, where the demand value has
exceeded, is maintained against each level. Thus, the total count of demands compared
is also maintained.

Table 5–6: Demand Profile

Level Demand kVA / kW / Amps Cumulative Counts
L9 1750 0
L8 1700 0
: : :
L3 1450 0
L2 1400 3
L1 1350 16
L0 1300 35
L-1 1250 39
L-2 1200 73
L-3 1150 127
: : :
L-8 900 1352
L-9 850 1379
Total 1440

Power Cycle Modes

The smart demand controller has different power cycle modes.
• Auto Mode: In Auto mode, demand values are updated and remain constant for any
number of subsequent demand periods.
• User/RTC mode: In User and RTC mode, demand values are updated appropriately
and fall back to zero at the end of the particular demand period. For next demand
period cycle, the demand accumulations start afresh.
NOTE: The demand values update when the load is fluctuating.

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Control Power interruptions

The control power interruptions during and between Demand Interval Period (DIP) under
Auto, User and RTC modes are described below with illustrations:
Use case description Expected behaviour
• Inject measurement signals.
• Switch OFF the meter before the period completion.
• Switch ON with in the period completion. • Present demand and predicted demand
continues from previous values.
• Last demand continues to be the same at
the instance of meter restart.

UUT = OFF

• Inject measurement signals.

• Switch OFF the meter in the current DIP.
• Switch ON the meter in the next DIP. • Present demand and predicted values start
from afresh in the new cycle.
DIP • Last demand continues to be the same at
the instance of meter restart.

UUT = OFF

• Inject measurement signals.

• Switch off the meter before the DIP completion.
• Skip a Demand Interval period.
• Switch on the meter in the next demand interval period. • Present demand, Last Dmd and predicted
demand are all set to Zero.
DIP

UUT = OFF

• User mode behavior is similar to RTC mode, but during every power interruption, the
Dm values start afresh irrespective of between and outside the DIP.
• In Auto mode, Dm values drop off to, or will reach zero.
• The Dm values update appropriately when the load is fluctuating.

Timer Offset
Timer offset is caused when user does a Demand sync operation during the running DIP.
In order to sync the TR with the RTC, user has to:

1. Make changes in Dm setup page.

2. Select Dm control.
3. Save the settings.
4. Go back to the original Dm settings.

Integrator
An Integrator is a register in which all the integrated (energy and time) parameters like
VAh, Wh, VARh, Ah, PF(avg), Vavg., Favg. Run Hours, maximum demand (PF) etc are
accumulated or stored.

Energy Readings
The smart demand controller calculates and stores accumulated energy values for real,
reactive, and energy.

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You can view accumulated energy from the display. The resolution of the energy value
automatically changes from kVAh to GVAh.

Energy values can be reported over communication as 32-bit float and 64-bit signed
integers. The units for 32-bit float integers are kWh, kVARh, or kVAh and for 64-bit signed
integers are Wh, VARh, or VAh.

The smart demand controller distinguishes the direction of power flow (kW). It integrates
energy parameters kVAh, kWh, kVARh, Ah, PFavg, VLLavg, VLNavg, Favg during the
forward and reverse flow of energy, where Energy parameters readings accurately
reflects the billing.

Import-Export energy parameters are available.

Quadrant Based VARh

The meter provides a 4-quadrant based accurate reactive energy metering. These are
available using Modbus communication.

90

VARh 2 VARh 1
Quadrant 2 Quadrant 1

180 0

VARh 3 VARh 4
Quadrant 3 Quadrant 4

270

Preset Energy Values

The smart demand controller provides preset energy feature. This feature helps in
inputting previous energy values in case of a meter replacement or panel change. Preset
energy value cannot be set more than over flow energy value, that is 99999GWh.The
preset energy values include:

• Delivered / Import / Forward

• Received / Export / Reverse
• Forward + Reverse
• Forward - Reverse

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Timers
RUN hours: Indicates the period the load has been ON and has run. This counter
accumulates as long as the load is ON.

On hours: The period for which the smart demand controller (supply) is ON.

INTR: Number of supply outages, means the number of load outages. The meter displays
forward and reverse interruption counts based on the direction of current flow.

Previous (Old) Readings

The smart demand controller has previous (old) data register, where the last cleared
energy and timer values are stored. The energy and timer values in the integrator are
transferred to the previous (old) register when the reset energy is cleared (manually/due
to overflow).

Thus, the previous (old) energy values are not lost even after the integrator is cleared and
can be viewed with the previous (old) parameter. Remember that the previous (old)
values will be overwritten, when the INTG is cleared next time.

Harmonics

THD
Total Harmonic Distortion (THD) is a quick measure of the total distortion present in a
waveform and is the ratio of harmonic content to the fundamental. It provides a general
indication of the “quality” of a waveform. THD is calculated for both voltage and current.
The smart demand controller uses the following equation to calculate THD:

HC
THD = X 100%
H1
where,

HC (Harmonic Content) = H²2 + H²3 + H²4 +...

H1 = Fundamental Content

Individual Harmonic
The smart demand controller gives the power quality measurement parameters. The
power quality parameters measured are individual harmonic distortion% for V1 V2 V3 /
V12 V23 V31, I1, I2, and I3 waveforms.

Harmonics: Percentage of each harmonic divided by fundamental harmonics

Vh
Vh = X 100%
V1
where,

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Vh = Harmonic Voltage

V1 = Fundamental Voltage

The device measures harmonic distortion from 2nd to 31st level.

Time Of Use (TOU)

TOU Demand Upper & Lower settings can be set through front panel keys. TOU schedule
configuration can be done only through ION setup. See “Time Of Use (TOU)” on page 40
for more information on TOU and TOU setting and configuration.

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Installation

Mechanical Installation
The smart demand controllers are panel-mounted and have reliable, rear-mounted
pluggable connectors.The 92 x 92 mm (3.62 x 3.62 in.) cut-out and 96 x 96 mm (3.78 x
3.78 in.) bezel dimensions adhere to IEC 61554.

The diagram below displays the various dimensions of mechanical installations.

Figure 5–14: Mechanical dimensions

12.6 mm 71.7 mm

90
96.00 mm

107.4 mm
96.6 mm
°
°

90
96.00 mm
<5.75 mm

Figure 5–15: Recommended Panel Cut-Out

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Mounting
The smart demand controllers are panel mountable.

The cut-out should be punched with the proper tool and should be free from burrs. The
following figure explains the mounting of the smart demand controller.

Figure 5–16: Mounting

+ 0.8
92.0 -m0.0
m

- 0.0
92.0 mm
+ 0.8
< 6.4
(< 0.25)

ICK
CL
ICK
CL

K
AC
CL

K
AC
CL

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Chapter 6—Maintenance and Troubleshooting

Chapter 6 — Maintenance and Troubleshooting

Password Recovery
Alarms

Visit www.schneider-electric.co.in for support and assistance with lost passwords or other
technical problems with the meter.

Make sure you include your meter’s model, serial number and firmware version in your
email or have it readily available if calling Technical Support.

Smart Demand Controller Memory

The smart demand controller uses its nonvolatile memory to retain all data and metering
configuration values. Under the operating temperature range specified for the smart
demand controller, this nonvolatile memory has an expected life of at least 45 years.

NOTE: Life expectancy is a function of operating conditions and does not constitute any
expressed or implied warranty.

Identifying the Firmware Version, Model, and Serial Number

1. Scroll to [Maint] in the menu
list.
2. Press [Maint] to view the
model, firmware (OS)
version, serial number, and
other smart demand
controller information.
3. Press to return to the ▲
maintenance screen.

Firmware Upgrade
The smart demand controller supports the downloading of new firmware and language
files over the communications link. This requires the free DLF3000 software, which is
available at www.schneider-electric.com. The DLF3000 offers an extensive Help file with
information on operating the software. The most recent firmware and language files are
also available on the website.

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PowerLogic™ EM7230 / EM7280 / EM7290 HRB32898-EN07
Maintenance and Troubleshooting 05/2017

Troubleshooting
The information in Table 6–1 on page 66 describes potential problems and their possible
causes. It also describes checks you can perform or possible solutions for each. After
referring to this table, if you cannot resolve the problem, contact your local Schneider
Electric sales representative for assistance.

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

• Apply appropriate personal protective equipment (PPE) and follow safe electrical
practices. For example, in the United States, see NFPA 70E.
• This equipment must be installed and serviced only by qualified personnel.
• Turn off all power supplying this equipment before working on or inside.
• Always use a properly rated voltage sensing device to confirm that all power is off.
• Carefully inspect the work area for tools and objects that may have been left inside
the equipment.
• Use caution while removing or installing panels so that they do not extend into the
energized bus; avoid handling the panels, which could cause personal injury.

Failure to follow these instructions will result in death or serious injury.

Heartbeat/Communication LED
The heartbeat/communication LED helps to troubleshoot the smart demand controller.
The heartbeat/communication LED works as follows:

• Normal operation — the LED flashes at a steady rate during normal operation.
• Communications — the LED flash rate changes as the communications port
transmits and receives data. If the LED flash rate does not change when data is sent
from the host computer, the smart demand controller is not receiving requests from
the host computer.
• Hardware — if the heartbeat LED remains lit and does not flash On and Off, there is a
hardware problem. First check for the display at top left side corner icon for flash On
and Off, perform a hard reset of the smart demand controller (turn Off power to the
smart demand controller, then restore power to the smart demand controller). If the
heartbeat LED remains lit, contact your local sales representative.
• Control power and display — if the heartbeat LED flashes, but the display is blank,
the display may not be functioning properly or may have timed out (see “Smart
Demand Controller Clock Setup” on page 37). If the control power is available to the
meter, and still the display is blank and the LED is not lit, then contact your local sales
representative.

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HRB32898-EN07 PowerLogic™ EM7230 / EM7280 / EM7290
05/2017 Maintenance and Troubleshooting

Table 6–1: Troubleshooting

Potential Problem Possible Cause Possible Solution

Go to [Maint] > [Diag]. Event messages
The maintenance (wrench) When the maintenance (wrench) icon
display to indicate the reason the icon is
icon is illuminated on the is illuminated, it indicates an event
illuminated. Note these event messages and
smart demand controller has occurred which may require
call the Technical Support or contact your
display. attention.
local sales representative for assistance.
Verify that the smart demand controller line
The display is blank after The smart demand controller may not and terminals are receiving the necessary
applying control power to be receiving the necessary power. power.
the smart demand
The display may have timed out. Verify that the heartbeat LED is blinking.
controller.
Press a button to see if the display timed out.
Check that the correct values have been
entered for smart demand controller setup
parameters (CT and VT ratings, Nominal
Incorrect setup values.
Frequency, and so on). See “Setting Up the
Smart Demand Controller” on page 18 for
setup instructions.
The data being displayed is
Check smart demand controller voltage input
inaccurate or not what you
Incorrect voltage inputs. terminals L (8, 9, 10, 11) to verify that
expect.
adequate voltage is present.
Check that all CTs and VTs are connected
correctly (proper polarity is observed) and that
Smart demand controller is wired
they are energized. Check shorting terminals.
improperly.
See the recommended torque in the “Wire
Sizes and Torque” on page 18 section.
Check to see that the smart demand
Smart demand controller address is controller is correctly addressed. See “Setting
incorrect. Up Communications” on page 35 for
instructions.
Verify that the baud rate of the smart demand
controller matches the baud rate of all other
Smart demand controller baud rate is
devices on its communications link. See
incorrect.
Cannot communicate with “Setting Up Communications” on page 35 for
smart demand controller instructions.
from a remote personal Verify the smart demand controller
computer. Communications lines are improperly communications connections. Refer to the
connected. “Communications Capabilities” on page 71
section for instructions.
Check to see that a multipoint
communications terminator is properly
Communications lines are improperly
installed. See the“Communications
terminated.
Capabilities” on page 71 section for
instructions.
Verify the smart demand controller digital
Digital input lines are improperly input connections. Refer to the “Smart
connected. Demand Controller Configurations” on
Digital Inputs not reading. page 18 section for instructions.
Voltage levels at the Digital input Check the voltage for the digital input, as
connector side is not in the range. mentioned in the specification.
Check the load conditions to ensure it is in the
Whetting output voltage Whetting output lines are improperly
specified limits as mentioned in the
low. connected.
specification.
Verify the control output relay connections.
Refer to the “Smart Demand Controller
Control output relays are improperly Configurations” on page 18 section in the
Power demand controlling
terminated. installation manual for instructions.
fail.
Check the settings for the limits of demand in
Incorrect setup values.
the setup page.

The smart demand controller does not contain any user-serviceable parts. If the smart
demand controller requires service, contact your local sales representative. Do not open
the smart demand controller. Opening the smart demand controller voids the warranty.

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PowerLogic™ EM7230 / EM7280 / EM7290 HRB32898-EN07
Maintenance and Troubleshooting 05/2017

Getting Technical Support

Please refer to the Technical Support Contacts provided in the smart demand controller
shipping carton for a list of support phone numbers by country, or go to
www.schneider-electric.com select your country > Support, then navigate to support for
contact information by country.

Register List
To download the latest version of the EM72xx Register List.xlsx, go to www.schneider-
electric.co.in. For information on using the register list to configure the smart demand
controller with the command interface, see Appendix D “Command Interface” on page 73.

67 © 2017 Schneider Electric. All Rights Reserved.

HRB32898-EN07 PowerLogic™ EM7230 / EM7280 / EM7290
05/2017 CAL LED

Chapter 7—CAL LED

Chapter 7 — Maintenance and Troubleshooting

Setting up the CAL LED

Alarms

The LED setup screen allows you to configure the CAL LED for energy pulsing
application.

CAL LED settings menu tree

Maint Reset Meter

Setup Comm
Diag I/O LED
PWD
Dm
HMI
Clock
A.Rst

1. Navigate to Maint > Setup.

2. Enter the setup password (default is “0000”), then press OK.
3. Navigate to I/O > LED.
4. Press Edit.
5. Press + or - to modify the parameter as required, then press OK.
LED setup parameter

Parameter Values Description

Off disables the LED.
Mode Off, Energy
Energy sets the LED for energy pulsing.

6. Press to exit. Press Yes to save your changes.

Configuring the CAL LED for energy pulsing using ION Setup
You can use the ION Setup to configure your meter’s LED for energy pulsing.

1. Start ION Setup.

2. Connect to your meter
3. Navigate to I/O configuration > Energy Pulsing.
4. Select the LED to configure and click Edit. The setup screen is displayed.
5. Enter a descriptive name for the LED Label.
6. Configure the other setup parameters as required.
7. Click Send to save your changes.

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05/2017 CAL LED

Energy pulsing LED setup parameters available through ION Setup

Parameter Values Description

Off disables the LED.
Mode Off, Energy
Energy sets the LED for energy pulsing.
When configured for energy pulsing, this
defines how many pulses are sent to the LED
Pulse Wt. (p/k_h) 1 to 9999999
for every 1 kWh, 1 kVARh or 1kVAh of
accumulated energy.
Active Energy Delivered
Active Energy Received
Active Energy Del+Rec
Reactive Energy Delivered
Select which accumulated energy channel to
Channel Reactive Energy Received
monitor and use for energy pulsing.
Reactive Energy Del+Rec
Apparent Energy Delivered
Apparent Energy Received
Apparent Energy Del+Rec

Configuring the CAL LED using the front panel

You can use the front panel display to configure your meter’s LED for energy pulsing
application.

CAL LED settings menu tree

Maint Reset Meter

Setup Comm
Diag I/O LED
PWD
Dm
HMI
Clock
A.Rst

1. Navigate to Maint > Setup.

2. Enter the setup password (default is “0”), then press OK.
3. Navigate to I/O > LED.
4. Move the cursor to point to the parameter you want to modify, then press Edit.
CAL LED parameters available through the front panel

Parameter Values Description

Disabled turns off the LED completely.
Mode Disabled, Energy
Energy sets the LED for energy pulsing.

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05/2017 CAL LED

CAL LED parameters available through the front panel (continued)

Parameter Values Description

Active Del
Active Rec
Active Del + Rec
Reactive Del
Select which accumulated energy channel to monitor and
Parameter Reactive Rec
use for energy pulsing.
Reactive Del + Rec
Apparent Del
Apparent Rec
Apparent Del + Rec
When configured for energy pulsing, this setting defines
Pulse Wt. (p/k_h) 1 to 9999999 how many pulses are sent to the LED for every 1 kWh,
1 kVARh or 1kVAh accumulated energy.

5. Press or to modify the parameter as required, then press OK.

6. Press to exit. Press Yes to save your changes.

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05/2017 Communication Wiring

Appendix A—Communication Wiring

Communications Capabilities

Table A–1: RS-485 Communications Distances

Maximum Communication Distances
Baud Rate 1 to 32 Devices
Feet Meters
4800 9,000 2,744
9600 8,000 2,438
19200 6,000 1,829
38400 2,500 762
NOTE: Distances listed should be used as a guide only and cannot be
guaranteed for non-PowerLogic devices. Refer to the master device’s
documentation for any additional distance limitations.

Daisy-Chaining Devices to the Smart Demand Controller

The RS-485 slave port allows the smart demand controller to be connected in a daisy
chain with up to 31, 2-wire devices. In this document, communications link refers to a
chain of devices that are connected by a communications cable.

Figure B–1: Daisy-chaining 2-wire devices

• If the smart demand controller is the last device on the daisy chain, terminate it with
the terminator provided.
• See Table B–1 for the maximum daisy-chain communications distances for 2-wire
devices.
The terminal’s voltage and current ratings are compliant with the requirements of the EIA
RS-485 communications standard

HAZARD OF ELECTRIC SHOCK

• Shield conductors may be energized if not properly connected.
• Shield wire should be installed per the device’s installation instructions and grounded
at one end only.

Failure to follow these instructions will result in death or serious injury.

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05/2017 Power Factor Register Format

Appendix B—Power Factor Register Format

Power Factor Register Format

Each power factor (PF) value occupies one floating point register. The smart demand
controller display and ION software interpret the register format in all reporting or data
entry fields according to the Power (active, reactive, and apparent) Coordinate System
Chart. The Power (active, reactive, and apparent) Coordinate System Chart uses the
power factor register value to provide information on leading or lagging power factor and
current, as well as energy delivered or received.

• Power Factor (PF): The ratio of Active (W) power to Apparent (kVA) power (i.e.
kW/kVA).
• True Power Factor: Includes harmonic content.
• Leading PF: Active and Reactive power flowing in opposite directions.
• Lagging PF: Active and Reactive power flowing in the same directions.

The Power (active, reactive, and apparent) Coordinate System chart quadrants are based
on Active and Reactive power from the point of view of a utility. Whether or not a
connected facility or substation is consuming or providing energy, it is assumed that the
utility considers it the load.

Table B–1: PF (power factor) standards

Quadrant IEC IEEE
Quadrant 1 + -
Quadrant 2 - +
Quadrant 3 - -
Quadrant 4 + +

To determine power factor:

1. Get the register value.

2. Use the register value to determine in which quadrant the system is operating.
NOTE: The Quadrant determines lead/lag for power factor and current.
3. Use the register value to determine the flow of Active power:
a. a positive value indicates Energy Delivered.
b. a negative value indicates Energy Received.
4. Use the register value to determine power factor:
a. if the register value is within -1 to + 1, the register value is the power factor value.
b. if the register value is not within -1 to +1, the power factor value is derived
differently for Energy Delivered/Forward and Energy Received/Reverse systems:

For example:

• Register value = 0.999: Apparent power is in Quadrant 1, current (I) is lagging, and
energy is delivered by the utility to the customer with a lagging power factor of 0.999.
• Register value = -0.986: Apparent power is in Quadrant 3, current (I) is leading, and
energy is received by the utility from the customer with a lagging power factor of
0.986.

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05/2017 Command Interface

Appendix C—Command Interface

Command Interface
The command interface allows you to configure the power meter by sending specific
commands using Modbus protocol. Reference the online Modbus register list for meter
commands, results, and data types. For information on accessing the register list, see
“Register List” on page 67.

Table C–1: Command Interface

Protected Command Interface Unprotected Command Interface

Command Block Register # Register #
A Command 5000 5250

B Semaphore 5001 5251 (Ignored)

C Parameters 5002 - 5124 5252 - 5374

Meter Results Register # Register #

D Status 5125 5375

E Result 5126 5376

F Data 5127 - 5249 5377- 5499

A. In the Command register, enter a meter command.

B. In the Semaphore register, when using the protected command interface, enter the
semaphore you are given (see “Using the Protected Command Interface” on
page 74). The semaphore register is not used with the unprotected command
interface (see “Using the Unprotected Command Interface” on page 75).
C. In the Parameters register, enter all parameters for a meter command.
D. The Status register displays 0 when the power meter receives a command. Once the
command is completed, the status register displays the same value as the command
register.
E. The Result register indicates if the command was successful, and if not, what error
may have occurred.
F. The Data register displays the executed parameters of a successful command and
the invalid parameters based on data type of an unsuccessful command.

There are two command interfaces, protected and unprotected, described in the following
sections.

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05/2017 Command Interface

Using the Protected Command Interface

To issue a meter command using the protected command interface, you must have a
command semaphore.

To get a semaphore, read the semaphore Modbus register (see the “Command Interface”
section of the online “Register List” on page 67). The power meter will return a 0 or a
nonzero number.

• If 0 is returned, someone else owns the semaphore. You must wait for the semaphore
to be available before sending a command.
• If a nonzero number is returned, you now own the semaphore. The semaphore is
provided once until it is released or has been inactive for approximately 4 minutes.
Once you have the semaphore, subsequent reads of the semaphore register will
return 0 until you release the semaphore or it times out.

To send a meter command using the protected command interface:

1. Read the semaphore register and record the meter response. This is your semaphore.
2. Build the packet to be written to the command block.
3. Write the packet as a Modbus block write (enter the command number, semaphore,
and parameters at the same time).
Table C–1: Protected Command Block Example
Command Block Register #
Command 2039
Semaphore 5
Parameters 1

4. Monitor the meter response registers for validity and completion.

Table C–1: Protected Meter Response Example
Meter Response Register #
Status 2039
Result 0
Data 1

5. Write the semaphore back to the semaphore register to release it for another master
to use.

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05/2017 Command Interface

Using the Unprotected Command Interface

The unprotected command interface allows you to issue a broadcast command to multiple
meters at once. The unprotected command interface ignores the semaphore register.

Although some applications require the unprotected command interface, it is

recommended that you use the protected command interface whenever possible.

To send a meter command using the unprotected command interface:

1. Build the packet to be written to the command block.

2. Write the packet as a Modbus block write (enter the command number, any number
as the semaphore, and the parameters at the same time).
Table C–1: Unprotected Command Block Example
Command Block Register #
Command 2039
Semaphore ___
Parameters 1

3. Monitor the meter response registers for validity and completion.

Table C–1: Unprotected Meter Response Example
Meter Response Register #
Status 2039
Result 0
Data 1

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HRB32898-EN07 PowerLogic™ EM7230 / EM7280 / EM7290
05/2017 Glossary

Glossary

Terms

accumulated energy—energy accumulates as either delivered to the customer or

received from the customer.
active alarm—an alarm that has been set up to trigger the execution of a task or
notification when certain conditions are met. An icon in the upper-right corner of the
power meter indicates that an alarm is active (!).
ASCII—American Standard Code for Information Interchange
baud rate—specifies how fast data is transmitted across a network port.
block interval demand—demand calculation method for a block of time; includes sliding
block, fixed block, or rolling block method.
communications link—a chain of devices connected by a communications cable to a
communications port.
current transformer (CT)—current transformer for current inputs.
demand—average value of a quantity, such as power, over a specified interval of time.
device address—used to identify a device on the Modbus communications link; defines
where the power meter resides in the power monitoring system.
energy delivered—the utility delivers energy to the facility; energy in.
energy received—the utility receives energy from the facility; the customer provides
power to the utility; energy out.
event—the occurrence of an alarm condition, such as Undervoltage Phase A, configured
in the power meter.
firmware—operating system within the power meter.
fixed block—a demand calculation method using an interval selected from 1 to 60
minutes (in 1-minute increments). The power meter calculates and updates the demand
at the end of each interval.
frequency—number of cycles in one second.
GMT—Greenwich Mean Time
lagging current (I)—current is lagging voltage up to 180°.
leading current (I)—current is leading voltage up to 180°.
lagging power factor (PF) —active and reactive power flowing in the same directions.
leading power factor (PF) —active and reactive power flowing in opposite directions.
line-to-line voltages—measurement of the rms line-to-line voltages of the circuit.
line-to-neutral voltages—measurement of the rms line-to-neutral voltages of the circuit.
maximum value—highest value recorded of the instantaneous quantity such as Phase
A Current, Phase A Voltage, etc., since the last reset of the minimums and maximums.
minimum value—lowest value recorded of the instantaneous quantity such as Phase A
Current, Phase A Voltage, etc., since the last reset of the minimums and maximums.
nominal—typical or average.
parity—refers to binary numbers sent over the communications link. An extra bit is
added so that the number of ones in the binary number is either even or odd, depending
on your configuration. Used to detect errors in the transmission of data.
partial interval demand—equal to energy accumulated thus far in the interval divided
by the length of the complete interval.

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Glossary 05/2017

max demand current—highest demand current measured in amperes since the last
reset of demand.
max demand real power—highest demand real power measured since the last reset of
demand.
max demand—highest demand measured since the last reset of demand.
phase currents (rms)—measurement in amperes of the rms current for each of the
three phases of the circuit.
phase rotation—refers to the order in which the instantaneous values of the voltages or
currents of the system reach their maximum positive values. Two phase rotations are
possible: A-B-C or A-C-B.
potential transformer (PT)—also known as a voltage transformer (VT).
power factor (PF)—power factor is the degree to which voltage and current to a load are
out of phase. Total power factor is the difference between the total power your utility
delivers and the portion of total power that does useful work. True power factor is the
ratio of real power to apparent power using the complete harmonic content of real and
apparent power. Calculated by dividing watts by volt amperes. Displacement power
factor is the cosine of the angle between the fundamental components of current and
voltage, which represents the time lag between fundamental voltage and current.
real power—calculation of the real power (3-phase total and per-phase real power
calculated) to obtain kilowatts.
rms—root mean square. Power meters are true rms sensing devices.
sliding block—an interval selected from 1 to 60 minutes (in 1-minute increments). If the
interval is between 1 and 15 minutes, the demand calculation updates every 15 seconds.
If the interval is between 16 and 60 minutes, the demand calculation updates every 60
seconds. The power meter displays the demand value for the last completed interval.
spare load— Spare load values indicate the excess or remaining load:
+ve Spare load: Additional available load
-ve Spare Load: Required amount of load shedding to stay below upper limit
thermal demand—demand calculation based on thermal response.
Total Harmonic Distortion (THD)—indicates the degree to which the voltage or current
signal is distorted in a circuit.
total power factor—see power factor.
voltage transformer (VT)—also known as a potential transformer (PT).

77 © 2017 Schneider Electric. All Rights Reserved.

HRB32898-EN07 PowerLogic™ EM7230 / EM7280 / EM7290
05/2017 Glossary

Abbreviations
A—Ampere
Ah—Ampere-hours
Amps—Amperes
CPT—Control Power Transformer
CT—Current Transformer
D In—Digital Input
D Out—Digital Output
DMD—Demand
DO—Drop Out
F—Frequency
Favg—Frequency average
GMT—Greenwich Mean Time
GVAh—Gigavolt ampere hour
Hz—Hertz
I—Current
I/O—Input/Output
Imax—Current maximum demand
kVA—Kilovolt-Ampere
kVAh—Kilovolt-Ampere hour
kVAD—Kilovolt-Ampere demand
kVAR—Kilovolt-Ampere reactive
kVARD—Kilovolt-Ampere reactive demand
kVARH—Kilovolt-Ampere reactive hour
kW—Kilowatt
kWD—Kilowatt demand
kWH—Kilowatthours
kWmax—Kilowatt maximum demand
Mag—Magnitude
Maint—Maintenance
Min—Minimum
MnMx—Minimum and maximum values
MSec—Milliseconds
MVAh—Megavolt ampere hour
MVARh—Megavolt ampere reactive hour
MWh—Megawatt hour
OS—Operating System (firmware version)
Pd—Real power demand
PF—Power factor
PF (avg)—Power factor average
PM—Power meter
Prim—Primary
PT—Potential Transformer (also known as VT–Voltage Transformer)
PU—Pick Up
Pulse—Pulse output mode

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PowerLogic™ EM7230 / EM7280 / EM7290 HRB32898-EN07
Glossary 05/2017

Pwr—Power
RS—Firmware reset system version
SN—Power meter serial number
Sec—Secondary
THD—Total Harmonic Distortion
U—Voltage line to line
V—Volts
Vavg—Voltage average
VT—Voltage Transformer (also known as PT–Potential Transformer)
VAR—Volt ampere reactive
Vmax—Maximum voltage
Vmin—Minimum voltage

79 © 2017 Schneider Electric. All Rights Reserved.

HRB32898-EN07 PowerLogic™ EM7230 / EM7280 / EM7290
05/2017 Index

accessories 8
Index basic setup 25
box contents 8
characteristics 52
clock setup 37, 39, 41, 45, 46, 49
communication setup 34
B demand setup 30
block interval demand method 56 firmware 8
hardware 7
C HMI setup 35
command interface 73 memory 64
protected 74 reset 49
unprotected 75 predicted demand calculation 56
communications
setup 35 R
readings
D demand 55
demand real-time readings 7, 52
predicted 56 min/max values 54
setup 30 reset
demand power calculation 55 single 49
demand readings 55 Resets 49
peak demand 56 rolling block 56
predicted demand 56 RS-485 53
display
menu overview 17 S
operating 14 semaphore 74
setup
E communications 35
energy readings 58, 59 CT 25, 26
demand 30, 31
F passwords 30
firmware 8 sliding block 56
fixed block 56
T
H technical support 67
HMI troubleshooting 65
setup 35
W
L wiring
LED troubleshooting 66
communication 16
communications 65
heartbeat 16, 65

M
memory
power meter memory 64
menu 17
metered values
demand readings 55
energy readings 58, 59
min/max
real-time readings 54

P
password
default 25
recovery 64
power factor 55, 72
register format 72
power meter

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PowerLogic™ EM7230 / EM7280 / EM7290 HRB32898-EN07
Index 05/2017

81 © 2017 Schneider Electric. All Rights Reserved.

 PowerLogic and Schneider Electric are trademarks or registered trademarks of Schneider
Electric in France, the USA and other countries. Other trademarks are the property of their
respective owners.

• This product must be installed, connected and used in compliance with prevailing standards
and/or installation regulations.

• If this product is used in a manner not specified by the manufacturer, the protection provided by
the product may be impaired.
Schneider Electric India Pvt. Ltd.
12A, Attibele Industrial Area, • The safety of any system incorporating this product is the responsibility of the
Neralur (PO), assembler/installer of the system.
Bangalore - 562107 India
As standards, specifications and designs change from time to time, always ask for confirmation
email: customercare.in@schneider-electric.com of the information given in this publication.
Toll Free Help desk Numbers:
1800 425 4272, 1800 103 0011 HRB32898-EN07 05/2017
www.schneider-electric.co.in © 2017 Schneider Electric. All Rights Reserved.