PowerLogic power-monitoring units

EM1000 series power meter

Technical data sheet

 Basic energy meters EM1000 series
Functions and characteristics

The EasyLogic EM1000 series energy meter offers all the basic energy measurement
capabilities required to monitor an electrical installation in a single 96 x 96 mm unit.
PB105460

Characterized by their rugged construction, compact size, and low installation costs,
these state-of-the-art meters are ideal for control panels, motor control centres, and
genset panels.

The EasyLogic EM1000 series energy meter is available in two different versions to
better fit specific applications:
EM1250 for 5 Amp CT Secondary, class 0.5 accuracy and RS 485 port on MODBUS RTU
EM1251 for 1 Amp CT Secondary, class 0.5 accuracy and RS 485 port on MODBUS RTU

Applications
• Energy billing.
• Load balancing and optimization.
• Sub-metering.
• Electrical load monitoring.
• Gensets, Test benches, and laboratories.

EM1000 power meter. Main characteristics

• Elegant single row, bright backlit LCD display
• Fast in-line view, Three parameters name and value at one glance
• Direct reading of primary values - No multiplication factor
PB105463

• Kilo, Mega, and Giga indications with autoscaling capability

• User selectable default display page and lock.
• Resettable energy counter in addition to a permanent counter for energy display
• Test Pulse LED, in front of meter, for testing the calibration of the meter.
• Healthy phase indicators

High Resolution
• RMS values: 4 digits for RMS values
• Energy values: 10+3

Auto-scrolling
EM1000/1200 Front panel parts • Allows you to monitor a group of parameters sequentially with out any manual key
operation.
A - Voltage Line Indicators (Green)
B - Back-lit LCD Display Secure settings
C - Keys • Unique password protection for the setup parameters.
D - Calibration LED (Red)
E - Units/Menu Items Smart line indicators
F - Values • Helps you to check the presence of input supply voltage (healthy phase).

Smart Diagnostic
• CT missing.
PB105462

• Communication Status Indication

• PT missing.

EM1000/1200 Rear panel parts

A - Input current terminals A1, A2, A3

Part numbers
B - RS 485 terminals for EM1250 and Energy meter Part number
EM1251 energy meters EM1250 class 0.5 accuracy, 5 Amp CT Secondary and RS 485 port METCOEM1250
C - Auxiliary supply (control power) 44 to
EM1251 class 0.5 accuracy, 1 Amp CT Secondary and RS 485 port METCOEM1251
277 V AC/DC
D - Input voltage terminals V1, V2, V3,
VN 80 to 480 V AC LL

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Basic energy meters EM1000 series
Functions and characteristics (cont.)

Selection guide EM1250 EM1251

General
Use on LV and HV systems b b
Power accuracy 0.5 % 0.5 %
Energy accuracy 0.5 % 0.5 %
Power factor accuracy 0.5 % 0.5 %
Instantaneous rms values
Active, apparent, and Per phase and total b b
reactive power
Active, apparent, and reactive energy b b
Power factor Per phase and average b b
Communication
RS 485 communication (2 terminals) 1 1
MODBUS RTU protocol b b
CT Secondary
1 Amp b
5 Amp b

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Basic energy meters EM1000 series
Functions and characteristics (cont.)

Electrical characteristics
Type of measurement True RMS
Measurement +/-0.5% of reading at Cos Ø=1 for EM1250 and EM1251
Active
accuracy* at
current +/-0.5% of reading at Cos Ø=1 for EM1250 and EM1251
Power Apparent
operating
+/- 1.0% of reading at Cos Ø=1 for EM1250 and EM1251
range: Reactive
For 5A +/- 0.5% of reading at Cos Ø=1 for EM1250 and EM1251
Power factor
Nominal CT:
0.25A to 6A. Class 0.5 as per IEC 62053-22 for EM1250 and EM1251
Active
For 1A
+/- 0.5% of reading for EM1250 and EM1251
nominal CT: Energy Apparent
0.15A to 1.2A Class 1.0 as per IEC 62053-24 for EM1250 and EM1251
Reactive
Note: * PF error limit is same as W error limit in %
Data update rate 1s
EasyLogic EM1250 meter Input-voltage Inputs V1, V2, V3, VN
characteristics
Measured voltage 80 to 480 VAC L-L without PTs
Up to 999 kV with external PTs
Permissable overload 600 VLL
Burden 0.2 VA per phase max.
Impedance VLL - 3 MΩ, VLN – 3 MΩ (with communication
Frequency 50/60 Hz+/-5%
Input-current CT ratings Primary 1A - 99.0KA for 1A meter
5 A- 99.0KA for 5A meter
Secondary 1A for EM1251
5A for EM1250
Measurement range 250mA to 6A with 0.5% accuracy for EM1250 .
Starting current 5mA
150mA to 1.2 A with 0.5% accuracy for EM1251 .
Starting current 1mA
Permissible overload 10A for EM1250 and 2A for EM1251
Burden <0.2 VA per phase
Impedance < 0.1 ohm
Auxiliary supply AC 44 to 277 V
DC 44 to 277 V
Burden 4 VA max.
EasyLogic EM1251 meter Mechanical characteristics
Weight Approx. 0.5Kg (shipping), 0.4Kg (without packing)
IP degree of protection Front: IP 51; Rear: IP 40
Dimensions Bezel: 96 x 96 mm
Depth: 80 mm behind bezel
Panel cutout: 92 x 92 mm
Environmental characteristics
Operating temperature -10°C to +60°C (14 to 140 °F)
Storage temperature -25°C to +70°C (-4 to 158 °)
Humidity rating 5 to 95 % RH non-condensing
Altitude 2000 m
Measurement Category III
Pollution degree 2
Protection class 2
Electromagnetic compatibility
Electrostatic discharge as per IEC 61000-4-2*
Immunity to Electromagnetic RF Fields as per IEC 61000-4-3*
Conducted Immunity as per IEC 61000-4-6*
Immunity to Magnetic Fields as per IEC 61000-4-8*
Immunity to voltage dips and interruptions as per IEC 61000-4-11*
Fast transient as per IEC 61000-4-4*
Immunity to surge waves as per IEC 61000-4-5*
Impulse voltage as per IEC 60060 - 1*

Conducted and radiated emissions CISPR22 Class A

Safety and standards
Construction Self extinguishable V0 plastic;
Double insulation at user accessible area
Spacing and isolation as per UL and IEC standards

*as per IEC61326-1

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 Power-monitoring units EM1000 series
Installation and connections

EM1000 series meter dimensions

PB105461

Single phase connection

PB105467

Connection representation only. Other types of connection are possible.

Refer to the EM1000 series Quick Start Guide for details.

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 Power-monitoring units EM1000 series
Installation and connections

2-phase 3-wire connection

PB105468

Connection representation only. Other types of connection are possible.

Refer to the EM1000 series Quick Start Guide for details.
3-phase 3-wire Delta connection
PB111264

Connection representation only. Other types of connection are possible.

Refer to the EM1000 series Quick Start Guide for details.

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 Power-monitoring units EM1000 series
Installation and connections

3-phase 3-wire Open Delta connection

PB105466

Connection representation only. Other types of connection are possible.

Refer to the EM1000 series Quick Start Guide for details.

3-phase 4-wire WYE connection

PB105464

Connection representation only. Other types of connection are possible.

Refer to the EM1000 series Quick Start Guide for details.

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Schneider Electric Industries SAS As standards, specifications and designs develop from time to time, please ask for confirmation
35 Rue Joseph Monier of the information given in this document.
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PLSED310034EN ART 837556 AUGUST 2012