Prometer 100

High-precision meter

User Manual
BGX501-943-R01

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 Copyright © 2014, SIHPL

Page 2 of 72 Prometer 100 User Manual BGX501-943-R01

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 Table of Contents
1 Important Safety Information ..................................................................................................... 5
2 Disclaimer .................................................................................................................................... 5
3 Introduction ................................................................................................................................. 5
3.1 Prometer 100 meters ..................................................................................................................................... 5
3.1.1 The Prometer 100 meter in an energy management system ......................................................... 6
4 Physical Features........................................................................................................................ 7
4.1 Power Supply, Auxiliary and Other Details ................................................................................................... 7
4.2 Front Panel of Prometer 100-R ..................................................................................................................... 9
4.3 Front Panel of Prometer 100-W .................................................................................................................. 10
4.4 Connections to the Prometer 100-R ............................................................................................................ 11
4.5 Connections to the Prometer 100-W ........................................................................................................... 13
4.6 Sealing Arrangement in Prometer 100 - R .................................................................................................. 14
4.6.1 Front Cover Sealing ...................................................................................................................... 14
4.6.2 Rear Sealing Arrangement ........................................................................................................... 14
4.7 Sealing Arrangement in Prometer 100 – W ................................................................................................ 15
4.8 Pulse Inputs and Outputs ............................................................................................................................ 15
5 Prometer 100 and M-Cubed BCS.............................................................................................. 16
5.1 M-Cubed BCS ............................................................................................................................................. 16
6 Using the Display ...................................................................................................................... 16
6.1 Auto Scroll ................................................................................................................................................... 16
6.2 Manual ......................................................................................................................................................... 18
6.3 Display Buttons ............................................................................................................................................ 19
6.4 Menu Example Screens .............................................................................................................................. 20
6.5 Events .......................................................................................................................................................... 34
7 Functions ................................................................................................................................... 35
7.1 Meter clock .................................................................................................................................................. 35
7.1.1 Time Set........................................................................................................................................ 35
7.1.2 Time Advance and Time Retard (Sliding adjustment) .................................................................. 35
7.1.3 Daylight saving time ...................................................................................................................... 35
7.1.4 External synchronisation ............................................................................................................... 35
7.2 Support for Different Types of Energy ......................................................................................................... 36
7.3 Instant values .............................................................................................................................................. 37
7.3.1 Overview ....................................................................................................................................... 37
7.3.2 Prefix for units in the display ......................................................................................................... 38
7.3.3 Harmonics measurement.............................................................................................................. 38
7.3.4 THD............................................................................................................................................... 38
7.4 Daily Energy Snapshot ................................................................................................................................ 38
7.5 Digital inputs and outputs ............................................................................................................................ 39
7.5.1 Inputs ............................................................................................................................................ 39

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 7.5.2 Outputs ......................................................................................................................................... 40
7.6 Communications and Security..................................................................................................................... 41
7.6.1 Communication speed .................................................................................................................. 41
7.6.2 Security ......................................................................................................................................... 41
7.7 Loggers ........................................................................................................................................................ 42
7.7.1 Overview ....................................................................................................................................... 42
7.7.2 Logging interval and total channels .............................................................................................. 43
7.7.3 Storage of logged values .............................................................................................................. 44
7.8 Alarms ......................................................................................................................................................... 45
7.8.1 Overview ....................................................................................................................................... 45
7.8.2 Indication....................................................................................................................................... 46
7.8.3 Display of events .......................................................................................................................... 46
7.9 Maximum demand ....................................................................................................................................... 47
7.10 Historical registers ....................................................................................................................................... 48
7.11 Time of use .................................................................................................................................................. 48
7.11.1 Day type ........................................................................................................................................ 49
7.11.2 Season .......................................................................................................................................... 49
7.11.3 Holiday dates ................................................................................................................................ 49
7.11.4 TOU registers................................................................................................................................ 49
7.12 Billing Cycle Support ................................................................................................................................... 49
7.12.1 Billing Cycle .................................................................................................................................. 49
7.12.2 History of Energy, Rate and MD Register .................................................................................... 49
7.12.3 History for the Cause of Billing Register ....................................................................................... 49
7.12.4 Cumulative Maximum Demand Registers .................................................................................... 50
7.13 Meter Reading ............................................................................................................................................. 50
7.14 Scaling Tariff................................................................................................................................................ 50
7.15 Transformer compensation ......................................................................................................................... 50
7.15.1 Overview ....................................................................................................................................... 50
7.15.2 Instrument transformer compensations ........................................................................................ 51
7.15.3 Power transformer losses ............................................................................................................. 51
7.16 Quality of Supply ......................................................................................................................................... 51
7.16.1 Voltage monitoring ........................................................................................................................ 51
Appendix A: Abbreviations ............................................................................................................ 52
Appendix B: Material Declaration .................................................................................................. 52
Appendix C: Communication Ports ............................................................................................... 53
Appendix D: How to Read Meters through Ethernet Port ............................................................ 55
Appendix E: Calculation Principles ............................................................................................... 61
Appendix F: Connection and General Details ............................................................................... 66
Appendix G: List of DLMS Parameters .......................................................................................... 68
Frequently Asked Questions (FAQs) ............................................................................................. 70

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 1 Important Safety Information
Installation, wiring, testing and service must be performed in accordance with all local and national electrical
codes.
• Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices.
• This equipment must only be installed and serviced by qualified electrical personnel.
• Turn off all power supplying this device and the equipment in which it is installed before working on the
device or equipment.
• Always use a properly rated voltage sensing device to confirm that all power is off.
• Do not perform Dielectric (Hi-Pot) or Megger testing on this device.
• Connect protective ground (earth) before turning on any power supplying this device.

Failure to comply with the above safety measures could cause serious injuries.
If the meter is used in a manner not specified by the manufacturer, the protection provided by
connections may be impaired. The manufacturer shall not be held responsible for failure to
comply with the instructions in this manual.

2 Disclaimer
This user manual covers all types of the Prometer 100 energy meter. Depending on the product offering based
on business proposal, some features or functionalities may or may not be available in the supplied version. It is
therefore recommended to refer the features or functionalities according to the business offered.
The details of complete software’s features are out of the scope for this document, please contact concern sales
representative for its details if required. Note that due to variations between computers and improvements in
software, the screen shots shown in this manual may vary slightly from the appearance of the software on your
system.

3 Introduction
This manual discusses the Prometer 100 meter features and provides the information needed to configure and
use the meter. The manual covers all versions of Prometer 100-R (rack-mount) and Prometer 100-W (wall-
mount) meters.
By the time you are ready to use this guide, your meter should be installed, most basic setup should have been
performed, and communications/basic operation should have been verified. If the unit is not yet installed and
operational, refer to the Installation Guide shipped with the meter.
This section provides an overview of Prometer 100 meters and summarizes many of their key features.

3.1 Prometer 100 meters

Prometer 100 meters provide revenue-accurate, true RMS measurements of voltage, current, power and
energy, and are complemented by extensive I/O capabilities, comprehensive logging, and advanced power
quality measurement and compliance verification functions. The meters come with an extensive selection of pre-
configured data screens and measurements, so you can use the meters as they are shipped from the factory or
customize them to fit your unique requirements.
You can integrate the meters with software such as M-Cubed or with other energy management, SCADA,
automation and billing systems, using multiple industry-standard communication channels and protocols.
Common meter applications
• Transmission and distribution metering
• Revenue and tariff metering
• Total harmonic distortion monitoring

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 • Load management
• System stability monitoring
• Energy pulsing and totalization
• CT/VT error compensation
• Transformer loss compensation

3.1.1 The Prometer 100 meter in an energy management system

You can use Prometer 100 meters as standalone devices, but their extensive capabilities are fully realized when
used with software as part of an energy management system (EMS). EMS gives energy suppliers, service
providers, and large industrial and commercial energy consumers the tools to meet all the challenges and
opportunities of the new energy environment. EMS uses real-time information and control to directly address a
broad range of requirements throughout the power delivery chain. This system offers an integrated solution to
managing new billing structures, distributed generation, energy purchasing, energy cost control, operational
efficiency, power quality and reliability.
Applications that include the meter typically require additional equipment. Display and analysis software tools
are almost always used to manage, interpret and distribute the data measured or logged by a meter. There are
usually a variety of tools used, and often these tools are connected using different communications standards
and protocols. In many cases, a meter must also provide control capabilities and device-level data sharing.
The meter can adapt to many situations. Advanced communications allow data to be shared simultaneously
across multiple networks, built-in I/O provides monitoring and control capabilities, and a variety of display and
analysis tools to help you get the most from your power system.

Industry
Standard
Mounting

Multiple
Graphical
Communication
Display
Channels

Prometer
100

Multiple Pulse
Scalability and
Input and
Modularity
Output

Wide range
Voltage and
Current supply

Figure 1: An Overview

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 4 Physical Features
Prometer 100 is configurable for HV 3-phase 3-wire, HV 3-phase 4-wire or LV 3-phase 4-wire and is suitable for
mounting in a panel or on a wall. Prometer 100 has self-powered and auxiliary-powered variants. The auxiliary-
powered variant also comes with dual auxiliary support so that you can put AC or DC voltage for main and
backup supply for powering up the meter. The auxiliary circuit is not intended to be connected to the secondary
of measurement VT. For example, the VT secondary supply of 63.5 V AC (phase to neutral voltage) or 110 V
AC (phase-to-phase voltage) needs to be supplied as a voltage input to the product. Similarly three CTs, namely
R/L1, Y/L2 and B/L3, need (as applicable) to be given as a current input to the product of 1A/ 5A from
secondary side.
Note:
• Only Prometer 100-W variants can be configured as LV 3-phase 4-wire.

4.1 Power Supply, Auxiliary and Other Details

Details for the power supply and measurement options are shown below:

Figure 2: Power Supply Options

Field Replaceable
No. of Aux power Battery
Variants Main supply Backup supply supply inputs Range of Aux supply (for meter reading
supported and viewing
display)

Self+Aux Aux. supply Measurement 60-240 V AC/DC ± 20%

One
power input voltage terminals or Optional
(Aux 2)
supply (Aux 2) (VT supply) 24-48 V DC ± 20%

Measurement
Self
voltage
power Not available Not available Not applicable Optional
terminals (VT
supply
supply)

Auxiliary Aux. supply Both as 60-240 V AC/DC ± 20%

Two (dual)
power input Aux 1 (optional) or Optional
(Aux. 1 & Aux. 2)
supply (Aux 2) one as 24-48 V DC ± 20%

Table 1: Different Power Supply and other Variants available in Prometer 100

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 • In case of auxiliary-powered and self-powered variants, meter will draw power from Aux 2 supply input.
In its absence it will shift to Aux 1 supply (in case of auxiliary-powered variant) and VT supply (in case
of self-powered variant).
• Do not connect voltage transformer (VT) to any of the Aux supply input terminal as a general practice. If
it is necessary to connect VT secondary to Aux input then make sure to connect it to the Aux1 supply
only in presence of Aux 2 so that burden on measurement VT secondary can be minimal.
• Connect your reliable auxiliary supply source like DC bank/AC lighting load/ Aux power transformer etc
to Aux 2 terminal only so that meter burden will be handled by it; or take your best judgment to connect
auxiliary supply source considering the rating and suitable operation of meter and best installation
practices followed.
• The field replaceable battery can be configured to support meter reading in absence of mains power
supply depending on the requirement. It only supplies sufficient power to the meter reading and display
circuitry and will not fully power-up the meter. Contact the concern sales representative or technical
team regarding this useful feature. The battery can be replaced in the field. Take care while inserting
the battery; make sure that the polarity and fitment are correct.
• Ensure that the correct auxiliary voltage rating is used with the meter. The wrong voltage rating could
cause damage to the meter. Therefore it is recommended to verify and crosscheck the rating-plate on
the actual product in use at the site.

Figure 3: Rating Plate of Prometer 100-W (To be verified with realistic information and updated as per latest
changes)

Figure 4: Rating Plate of Prometer 100-R (To be verified with realistic information and can show one of the
rating plates with Aux 1 supply, ‘MADE in UK’ & S. No. here shown in bold and in Wall-mount not bold so
we should use same font style in order to maintain consistency, and updated as per latest changes)

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 4.2 Front Panel of Prometer 100-R

Figure 5: Front View

The front cover is made of translucent plastic with a transparent window to view the display. The cover has two
top hinges which allow the front cover to swing-up, allowing access to the sealed button and field replaceable
battery. The cover is secured in position by a retaining screw and also has provision to seal it.

Figure 6: Front Cover Opened

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 4.3 Front Panel of Prometer 100-W

Figure 7: Front View

The front cover is made of translucent plastic with a transparent window to view the display. The top cover is
used to seal the MD (Maximum Demand) reset button and field replaceable battery. The extended terminal
block cover is secured in position by retaining screws and also has provision to seal it.

Figure 8: Top Cover Removed

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 4.4 Connections to the Prometer 100-R
The diagram shows the rear connector with its pin diagrams for the meter. There are different options that may
be provided as per the specification agreed with the customer at the time of order.

Connect R/L1 Y/L2 B/L3 N Dual AUX

P/+ Terminal N/- Terminal
Supply
CT IN A01 A02 A03 NC
AUX1 B8 B9
CT OUT A1 A2 A3 NC
AUX2 B5 B6
VT B1 B2 B3 B0

Digital Input/Output
8 Outputs and 4 configurable Inputs/Output
O/P 1 C0, C1 I/O 1 D3, D2
O/P 2 C1, C2 I/O 2 D9, D4
O/P 3 C4, C3 I/O 3 D7, D8
O/P 4 C4, C9 I/O 4 D5, D6
O/P 5 C7, C8
O/P 6 C7, C6
O/P 7 D0, D5
O/P 8 D0, D1

Figure 9: Rear Connector with Pin Details

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 Note: For 3-phase 3-wire CT/VT operated refer to figure A
For 3-phase 4-wire CT/VT operated refer to figure B
For 3-phase 3-wire and 3-phase 4-wire connections from B5 to D9 are the same.
For self-powered variant Aux.1 (B8 and B9) supply is not available.
Figure 10: Connection Diagram
Note: One side of the CT secondary wiring should be earthed according to local practice.
The recommended size of the CT, VT and Aux power supply cable is 2.5 sq mm with lugs type as ring (M3 type)
for CT and H type for Aux and VT terminals.
In case of Prometer 100-R the internal earthing cable between the meter and the rack should also be
connected, and for this an M4 size screw is used in the meter and in the rack. The same ring type connector as
used in the CT connection can also be used.
The internal earthing cable should be about 5-10 cm in length to allow for ease of fitting and access and not
fouling with sharp edges of rack etc. Finally a proper earthing cable from rack to earth should be put up by
installer. Other accessories or shipway kit is supplied based on the requirement like seals, communication cords
etc.

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 4.5 Connections to the Prometer 100-W
Connections to the Prometer 100-W are made on the meter terminal under the terminal cover.

Connect R/L1 Y/L2 B/L3 N Dual AUX

P/+ Terminal N/- Terminal
Supply
CT IN 1 4 7 NC
AUX 1 13 14
CT OUT 3 6 9 NC
AUX 2 15 16
VT 2 5 8 11

Digital Input/Output
8 Outputs and 4 configurable Inputs/Output
O/P 1 18, 19 I/O 1 32, 33
O/P 2 20, 21 I/O 2 34, 35
O/P 3 22, 23 I/O 3 36, 37
O/P 4 24, 25 I/O 4 38, 39
O/P 5 26, 27
O/P 6 28, 29
O/P 7 30, 31
Figure 11: Rear Connector with Pin Details

Current, Voltage and Auxiliary supply connections

Pulse Input/ Output connections

Figure 12: Connection Diagram

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 4.6 Sealing Arrangement in Prometer 100 - R

4.6.1 Front Cover Sealing

Transparent
Window
Translucent
Front
Cover

Right-hand side
Left-hand side Sealing & Locking point
Sealing & Locking point Locking Screw
& Sealing points

Figure 13: Front Cover Sealing Arrangement

The front cover can be sealed in the closed position. This will stop the front cover from being opened and
restrict unauthorised access to the MD Reset pushbutton and internal areas. There are also sealing points on
either side of the meter for securing it to a rack or frame. The sealing bore diameter is 2.0 mm and is suitable for
seals.

4.6.2 Rear Sealing Arrangement

When the meter is fitted into the rack, a cover can be fitted which conceals all the rear connectors. The figure
below show the sealing points for the rear cover. The figure shows the single rack example with an enlarged
detailed view of the sealing points.

Figure 14: Front and Rear Sealing Points – 11” Rack Installation

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 4.7 Sealing Arrangement in Prometer 100 – W
The meter incorporates sealing bars and screws with through-holes, through which traditional lead/wire seals
can be inserted. When utilized, these lead/wire seals can help prevent unauthorized personnel from gaining
access to meter internals or to button under the cover. The sealing provision in Prometer 100-W is as follows:
• The front cover can be sealed through the two sealing points under the terminal cover.
• The secondary terminal cover can be sealed through a sealing point.
• The extended terminal cover can be sealed through the two sealing points.
• The top cover can be sealed through the two sealing points.
• The 1107 optical communication port can be sealed using rotational seal.

Figure 15: Sealing Points

4.8 Pulse Inputs and Outputs

The product support multiple pulse inputs and outputs. A maximum of eight pulse outputs (for Prometer 100-R)
and seven pulse outputs (for Prometer 100-W); and four configurable pulse input/ output can be provided as per
the specification agreed at the time of order.
Two pulse outputs (3 and 4 in case of Prometer 100-R / 2 and 3 in case of Prometer 100-W, refer to Figure 10
and Figure 12 for details) are linked to two pulse output LEDs indication as available on front side of meter so
that user can have a visualisation sort of feature by physically seeing the LEDs. The pulse output 3 (in case of
Prometer 100-R) / 2 (in case of Prometer 100-W) is linked to pulse output LED 1 and the pulse output 4 (in case
of Prometer 100-R) / 3 (in case of Prometer 100-W) is linked to pulse output LED 2. The Pulse Output LEDs can
be configured through M-Cubed 100 either at factory or in field. One pulse input can be used for time
synchronization application.
Configurable pulse input/output rating: 24 to 240 V AC/DC. Isolation will be available for each individual
input/output.
Pulse output rating: 24 to 40 V DC or 48 to 240 V AC/DC @ 100 mA (Pulse outputs will have volt free contact).
The only one rating will be applicable for entire block (each containing four outputs) and so isolation available
will be for entire block. The outputs are of solid-state type and when the meter is turned off, they are open.

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 5 Prometer 100 and M-Cubed BCS
This section describes the various operations that can be performed using the M-Cubed BCS with Prometer 100
meter.

5.1 M-Cubed BCS

Figure 16: Prometer100 and M-Cubed BCS

M-Cubed stands for Modular Meter Management and is the name of Secure’s software suite for programming
meters, reading data and reporting from energy meters. M-Cubed has separate modules that can be configured
to suit particular applications and access rights required by individual users.
M-Cubed can be used for:
• Configuration
• Commissioning
• Meter Reading
• Data Viewing
The M-Cubed helpfile contains a detailed description of all these functions.

6 Using the Display

There are two types of display mode: Auto Scroll and Manual Mode. The two types of display modes and their
associated settings and parameters are discussed in this section. All single parameters, e.g. voltage, will be
displayed with their OBIS codes. A large selection of parameters (Auto + Manual) can be chosen for display.

6.1 Auto Scroll

Auto Scroll is the default mode. A large number of parameters can be chosen for this mode. The display time
out time can be configured in the field using M-Cubed or by the display keys. Once the display button is
pressed, the Auto Scroll mode will be interrupted and will switch to manual mode. If no button is pressed in
manual mode, the display will time out and revert to auto mode. The display will resume from the last displayed
parameter. The display LCD backlight is always on.
The Auto Display pages will look as shown below (details can be checked as agreed in purchase order):

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 Note:
‘T’ stands for Total (Fundamental with harmonics)
‘F’ stands for Fundamental
‘C’ stands for Current
‘MD’ stands for Maximum Demand

6.2 Manual
Display parameters are grouped in to a number of pages. Each page parameters can be individually selected. A
considerable number of parameters can be assigned in manual mode.
Display Groups
The display is arranged into groups for easier navigation.
• Fixed Display Page: Fixed default displays (not configured by tariff)
• User Configurable Pages: User selected parameters. Page name can also be configured. Up to 7 pages
can be configured.
• Favourite: These are selected from the user configurable pages and up to 20 parameters can be
selected in the field.
• Configuration: Configuration page for Metrological LED, Display time out, Delete Favourite page
displays, Reset Battery time, Meter Constant, MODBUS and language configuration.

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 6.3 Display Buttons
The meter has four user buttons. One button can be used for performing MD reset or for navigating through the
sealed button display sequence depending on the requirement and is behind a sealable door. The other three
buttons are used for navigating through the display and configuration menu options.

Figure 17: User Buttons

A page can be selected by pressing the enter button. A navigation screen will appear showing all the available
pages. The Up and Down buttons can then be used to choose a page. Press the Enter button to select your
choice.

Figure 18: Selecting a Page (instead of the word ‘Tamper’, ‘event’ can be used in the display menu)
Once you have selected a target page, you can then use the Up/Down buttons to scroll through that selected
page. Parameters are cyclically displayed in the selected page, i.e. after the last parameter in the list is
displayed, the display will return to the first in the list, and so on.
Press the Enter button to return to the immediate parent page.

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 6.4 Menu Example Screens
Fixed Display Page
Select the Fixed Display Page from the top line menu. The following screen will be displayed.

Figure 19: Fixed Display Page

The Fixed Display pages are shown below:

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 Refer to tariff for Multiplier value

Note:
‘I’ stands for Import
‘E’ stands for Export
‘T’ stands for Total (Fundamental with harmonics)
‘F’ stands for Fundamental
‘R’ stands for Right
‘L’ stands for Left
‘Cfg. IO’ stands for Configurable Input/Output

User Configurable Pages

Up to seven user configurable pages can be defined complete with page title e.g. Instant Parameters, see
Figure 20 below. The page title can have a maximum of 20 alphanumeric characters. The illustrations shown
below are indications of how the pages and their respective displays will be displayed. The final pages and their
corresponding displays are dependent on the specification of your purchase order.

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 Figure 20: User Configurable Pages

Instantaneous Parameters

Use the Up/Down buttons to scroll to the Instant Parameters page. The
selection will be highlighted.
Press the Enter button to open the page.
Use the Up/Down buttons to scroll within the page and view the various
screens.

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 Note:
‘D’ stands for degree
‘M’ stands for minutes

Energy Registers
In this example the user defined page has been configured to view the energy registers and an appropriate
page title has been chosen for easy identification. Always choose a user friendly and self-explanatory name for
your titles. We have used “Energy Register” for our title example.

Use the Up/Down buttons to scroll to the Energy Registers page. The
selection will be highlighted.
Press the Enter button to open the page.
Use the Up/Down buttons to scroll within the page and view the various
screens.

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 Demand Data
This page has been set up to capture demand values.

Use the Up/Down buttons to scroll to the Demand Data page. The
selection will be highlighted.
Press the Enter button to open the page.
Use the Up/Down buttons to scroll within the page and view the various
screens.

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 High Resolution Energy Register
This page has been set up to capture high resolution energy registers.

Use the Up/Down buttons to scroll to the High Resolution Energy

Registers page. The selection will be highlighted.
Press the Enter button to open the page.
Use the Up/Down buttons to scroll within the page and view the various
screens.

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 Previous IP data
This page has been set up to capture previous IP data.

Use the Up/Down buttons to scroll to the Previous IP Data registers

page. The selection will be highlighted.
Press the Enter button to open the page.
Use the Up/Down buttons to scroll within the page and view the various
screens.

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 Event Information
This page details tamper events and status. Events are discussed in section 6.5

Use the Up/Down buttons to scroll to the Tamper Information page. The
selection will be highlighted.
Press the Enter button to open the page.
Use the Up/Down buttons to scroll within the page and view the various
screens.

Miscellaneous
This page details miscellaneous displays.

Use the Up/Down buttons to scroll to the Miscellaneous information

page. The selection will be highlighted.
Press the Enter button to open the page.
Use the Up/Down buttons to scroll within the page and view the various
screens.

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 Scroll Lock
Locking of individual parameter page in user configurable pages (manual pages) –

Up

press and hold

the Up Key for
5 seconds

Figure 21: Locking the manual page parameter

The screen can be locked to show a desired parameter. To screen lock a parameter, select the parameter using
the menu buttons (this is applicable under user configurable pages only). Press the Up key for 5 seconds.
During this process the display will temporarily move to the next parameter, then after 5 seconds will display
your selection.
To unlock the screen (i.e. revert to auto scroll mode) press the Up key for 5 seconds.
Favourite Page
This page is used for your selection of display parameters.

press and hold

the Down Key
for 5 seconds

Down

Figure 22: Adding parameter to favourite page

To add a parameter, go to the page containing the parameter that you require. Once the required page is
selected press the down key for 5 seconds, the selected parameter will now be added to your favourite page.
When the favourite page is full, you will need to delete complete list in this page to make space for the new one,
so be sure before selecting parameters as maximum 20 parameters can be selected in favourite display page.
To delete the complete list of Favourite parameters, go to the configuration page and select ‘Del Fav
Parameters’.

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 Configuration Page

Figure 23: Front view showing metrological LEDs

The configuration pages are used to set-up and enable features such as the metrological LEDs, display timeout,
meter constant, reset battery time, MODBUS configuration and language on display. They are also used to
manage your favourite selections.
The configuration page is password protected which can be accessed only by users authorized to change the
above configurations.
At the password prompt enter the 6-digit password (default password is ‘000000’) using Up and Down buttons
Use the Down key to enter a digit at the cursor position and use the Up key to move the cursor to the right while
entering a digit. After completing the entry, press the Enter button to confirm. Correct password gives access to
the first screen of configuration page. An incorrect password will display ‘Incorrect Password’ message.

The Prometer 100 meter display can be set to different languages. The following languages are available:
• English
• Swedish
• German
• French
• Spanish
• Russian
• Arabic
The configuration page displays are shown below.

Use the Up/Down buttons to scroll to the Configuration page. The

selection will be highlighted.
Press the Enter button and enter the correct password using Up and
Down buttons to open the page.
Use the Up/Down buttons to scroll within the page and view the various
screens.

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 Display to be added

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 (Russian and Arabic language options are missing in the above display)
The following displays are self-explanatory and occur at the time of events such as configuration, file download
etc. and are included here for your reference only.

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 User Selectable Display Examples (displays to be updated)

Description HV (3-phase 4-wire) Display HV (3-phase 3-wire) Display

Phasor Diagram

Bar graph

Same for HV3 and HV4

MD Value

Same for HV3 and HV4

Battery Status

Greater than equal

to 30% Same for HV3 and HV4

Battery Status

Less than 30% &

Greater than equal Same for HV3 and HV4
to 20%

Battery Status

Less than 20%

Same for HV3 and HV4

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 Battery Remaining
Hours

Same for HV3 and HV4

6.5 Events
The Prometer 100 has a number of defined events that are stored in the meter’s event log when they occur and
restore. The events are arranged into different logical compartments with defined numbers of events logging. An
event is displayed with a description and a time stamp in M-Cubed. All the events will be displayed in following
categories in meter display as– voltage related, current related and events other than voltage & current related.
The events do not enforce any electrical value changes inside the meter such as running the meter on I max etc.
Events are logged if the condition for the detection of an event persists for a specified duration, known as the
persistence time. Events can have a different persistence time for occurrence and restoration as applicable. The
persistence time for an occurrence as well as for restoration is configurable at factory end for respective event
as applicable. However some events like power on/off, magnet will not have any restoration time because of the
nature and type of the event. Similarly some events can have the same condition of tamper detection as per the
nature and type of the event in a given circumstances.
The general events supported are as follows –
1. Phase-wise missing potential
2. Voltage unbalance
3. Invalid Voltage
4. Over Voltage
5. Under Voltage
6. Phase wise current circuit reversal
7. CT Miss
8. Current unbalance
9. Feeder Supply Fail
10. Power on/off
11. Front cover and ETBC Open detection in power on/off condition (applicable for Prometer 100-W)
There are other customised events like Neutral Disturbance (ND), Magnet immunity, CT open/ Bypass and
%THD for voltage and current are also supported in meter.

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 7 Functions
This section provides an overview of the functions available in Prometer 100. All functions in the meter can be
both configured and read in M-Cubed. In many cases, M-Cubed can also export data to a file or print out data.

7.1 Meter clock

The Prometer 100 has an integrated real-time clock for time-dependent functions. Information about time
adjustment and daylight saving time status is recorded with tags on the logged values (refer to the section
Loggers on page 42). Time set is also noted as an event in the event log; see the section Display of events (pg.
46).

7.1.1 Time Set

The meter’s date and time can be set to an absolute point in time. Instantaneous adjustment of the meter’s time
can influence logged values. For this reason, instantaneous adjustment of the meter clock is primarily intended
for use at initial configuration of the meter.

7.1.2 Time Advance and Time Retard (Sliding adjustment)

When the Prometer 100 is not being used for on-line application, the meter’s time can be advanced or retarded
using time advance or time retard commands with M-Cubed BCS. The meter time can be retarded or advanced
by t tc seconds spanned over N tc consecutive blocks of 15 minutes (t tc / N tc seconds for each block). The meter
automatically adjusts for any time correction during the load survey reading period. Once a meter gets and
accepts a time advance/retard command, it is not possible to do time adjustment for the next 7 days.

7.1.3 Daylight saving time

Prometer 100 offers the alternative of letting the meter clock follow daylight savings time. At a specified date,
the meter clock is adjusted forward, and at another, adjusted backward. Prometer 100 can store 15 years of
DST configuration.
Example: On 28 March the clock is to be adjusted forward, from 02:00 to 03:00. The adjustment back to
standard time is to occur on 31 October at 3:00 (daylight savings time) when the clock is to be set back to
02:00. The following is set in the meters: Begin March, 28, 02:00. End October, 31, 03:00 and the standard time
is to be adjusted by 60 minutes.

7.1.4 External synchronisation

The meter time can be adjusted by a pulse on one of the meter’s digital inputs. When a pulse is registered, the
clock is adjusted to the closest multiple of a specified synchronisation interval. If the synchronisation interval is,
for example, one minute and the time is 13:00:29, a pulse will adjust the clock to 13:00:00. If the time had
instead been 13:00:31, the clock would have been adjusted to 13:01:00.
Available synchronisation intervals are:

1, 2, 5, 10, 15, 20, 30, 45 and 60 minutes

12 and 24 hours
A digital input must be configured for clock synchronisation (refer to the section Digital inputs and outputs on
page 39).
Note: Meter will not sync the time if the time difference is more than the time adjustment limit configured in the
meter. By default, the time adjustment limit is set as 25 seconds. The time adjustment limit can be configured as
any value between 0 to 30 seconds.

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 7.2 Support for Different Types of Energy
Prometer 100 meter is used for feeder based applications where energy may flow in both the directions.
Prometer 100 is an Import Export type meter; its metering unit is capable of logging energy in both directions.

Active power export Active power import

(-) (+)

Reactive power

ϕ
import (+) II I
Capacitive
S
Q

Inductive

Reactive power III IV

export (-)

Quadrants Phase angle Current relative to voltage

I 0 to 90° Lagging
II 90 to 180° Leading
III -180 to -90° Lagging
IV -90 to 0° Leading

Prometer 100 supports different tariff structures and number of Energy types (refer to Table 2). Any combination
of energy types can be provided as per the specification agreed at the time of order.
The Energy Channel Registers are shown below:
Sr. TOD MD TOD Rate Daily Logger 1 Logger 2
Parameters Instantaneous Billing
No. / UMD Energy
Active Import Total
1
(Q1+Q4) Y Y Y Y Y Y Y
Active Export Total
2
(Q2+Q3) Y Y Y Y Y Y Y
Active Import
3 Fundamental
(Q1+Q4) Y Y Y Y Y Y Y
Active Export
4 Fundamental
(Q2+Q3) Y Y Y Y Y Y Y
Reactive Import while
5
Active Import – Q1 Y Y Y Y Y Y Y
Reactive Import while
6
Active Export – Q2 Y Y Y Y Y Y Y
Reactive Export while
7
Active Export – Q3 Y Y Y Y Y Y Y
Reactive Export while
8
Active Import – Q4 Y Y Y Y Y Y Y
Apparent – While
9 Active Import (See
Note 2) Y Y Y Y Y Y Y
Apparent – While
10 Active Export (See
Note 2) Y Y Y Y Y Y Y
Reactive Import
11
(Q1+Q2) Y Y Y Y Y Y Y
Reactive Export
12
(Q3+Q4) Y Y Y Y Y Y Y

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 Reactive Inductive
13
(Q1+Q3) Y Y Y Y Y Y Y
Reactive Capacitive
14
(Q2+Q4) Y Y Y Y Y Y Y
Net Active (Imp –
15 N N
Exp) * Y Y Y Y Y
Net Reactive
16 N N
(Q1+Q2-Q3-Q4) * Y Y Y Y Y
Active Import Total
17 N N
(Q1+Q4) - Phase 1 Y Y Y Y Y
Active Import Total
18 N N
(Q1+Q4) - Phase 2 Y Y Y Y Y
Active Import Total
19 N N
(Q1+Q4) - Phase 3 Y Y Y Y Y
Active Export Total
20 N N
(Q2+Q3) - Phase 1 Y Y Y Y Y
Active Export Total
21 N N
(Q2+Q3) - Phase 2 Y Y Y Y Y
Active Export Total
22 N N
(Q2+Q3) - Phase 3 Y Y Y Y Y
Table 2: Energy Channel Registers
The pre-defined energy channels can be configured for display, billing, TOD, MD, Load Survey and Daily
Energy in line with purchase order requirements at the time of order.
Notes:
1) All the bi-directional energy registers (* marked) will have sign indication (‘-‘sign will be available for
negative value and no sign for positive value).
2) In ‘Apparent’ and ‘Net Active’ energy calculation, ‘Active’ energy can be either ‘fundamental’ or ‘total’.
This can be configured through the tariff tool. Both energies need to be of same type.
3) Single phase measurements (17-22) are supported by the 4 wire configuration.

For energy types 1-16:

These registers are continuously increased depending on the selected energy.
Example: Main Energy Register kWh (I) will show the total imported active energy logged till date.
Recording of all supported energy types is possible but only those energy types are logged into the memory
which is specified by the tariff file. An individual register is provided for all selected energy types. These register
are called Main Energy Registers. Whenever an individual energy type is generated / consumed, its value is
updated in the corresponding main energy register. These registers cannot be reset.

7.3 Instant values

Besides energy, the Prometer 100 can also measure instant values. Instant values are constantly changing
values such as current, voltage, power and harmonics. The instant values are updated every second. The
formulas and definitions used to calculate the values are presented in Appendix E: Calculation Principles on
page 61.

7.3.1 Overview
This table provides an overview of the instant values that can be read on the meter. Readings can be viewed
with M-Cubed, on the display and with other software that has implemented Prometer 100’s communication
protocol. Most instant values can be logged; for more information, see section Loggers on page 42.
Instant value Available on 3-element meter Available on 2-element meter
Real Time Clock – Date and Time Yes Yes
Phase Voltage Yes (L1, L2, L3, Average) No
Line Voltage (L12, L23, L31, Average) Yes Yes
Line Current Yes (L1, L2, L3, Average) Yes (L1, L3, Average)
Active Current Yes (L1, L2, L3, Average) Yes (L1, L3, Average)
Reactive Current Yes (L1, L2, L3, Average) Yes (L1, L3, Average)
Voltage Phase angle (L12, L23, L31) Yes Yes

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 Current Phase angle Yes (L1, L2, L3) Yes (L1, L3)
Active power total Yes Yes
Active power per phase Yes No
Active power fundamental Yes Yes
Active power fundamental per phase Yes No
Reactive power total Yes Yes
Reactive power per phase Yes No
Apparent power total Yes Yes
Apparent power per phase Yes No
Power factor total Yes Yes
Power factor per phase Yes No
Frequency Yes Yes
Average THD voltage Yes Yes
THD voltage per phase Yes No
Average THD current Yes Yes
THD current per phase Yes No
Average THD power Yes Yes
THD power per phase Yes No

7.3.2 Prefix for units in the display

The presentation for units and the number of decimals depends on the magnitude of the value.

7.3.3 Harmonics measurement

Harmonics numbers 2 to 31 are measured for all currents and voltages. At a fundamental frequency of 50 Hz,
the second harmonic is 100 Hz, the third harmonic is 150 Hz, etc. Both the harmonics’ amplitude and phase
angle are measured and included in the calculation of power and energy, and their magnitude can be read via
the meter’s communication protocols. In M-Cubed, harmonic magnitude is presented with a diagram.
Voltage harmonics profile
Parameter Available on 3-element meter Available on 2-element meter
Real Time Clock – Date and Time Yes Yes
Voltage harmonics (2 to 31) – L1 Yes Yes
Voltage harmonics (2 to 31) – L2 Yes No
Voltage harmonics (2 to 31) – L3 Yes Yes

Current harmonics profile

Parameter Available on 3-element meter Available on 2-element meter
Real Time Clock – Date and Time Yes Yes
Current harmonics (2 to 31) – L1 Yes Yes
Current harmonics (2 to 31) – L2 Yes No
Current harmonics (2 to 31) – L3 Yes Yes

7.3.4 THD
THD stands for Total Harmonics Distortion and is a measurement of the amount of harmonics present in a
signal. Voltages and currents’ THD can be read via M-Cubed and on the display.

7.4 Daily Energy Snapshot

Energy Snapshot feature saves the value of a particular energy register at a particular time. Prometer 100
stores a snapshot of different energy registers (can be up to 28 energies) on a daily basis at predefined time as
selected from tariff configuration (generally it is set at midnight). Snap shots are generally stored for 45 days
and can be stored for a maximum of 100 days as configured at factory. The updating of Energy Snap shot
records is done in a rollover fashion, i.e. each day a new energy snapshot is stored in the memory and the
earliest record is deleted. So at any time a meter will have energy snapshot records for the last 45 days.

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 7.5 Digital inputs and outputs
The Prometer 100 has several inputs and outputs that can be configured to perform various tasks. Both inputs
and outputs are protected against overvoltages by varistors. They also have an isolated interface between the
electronics and the surroundings to ensure personal safety. For electrical data on the meter’s inputs and
outputs, see Appendix F: Connection and General Details (page 66).

7.5.1 Inputs
The inputs can be configured as follows:
• Not used
The input is not used.
• Finish historical period (To be verified that only ‘Finish Hist Period’ Input can be set to inverted
as in ConfigView S/W it allows none of the inputs to be set as inverted)
An incoming pulse will result in the present period ending and registers being copied to historical
registers. The meter registers pulses on positive or negative flanks, depending on if the input is set to
inverted or not. By setting limits for maximum and minimum pulse lengths, the meter can be limited as
to what it detects as a valid pulse. Pulses with lengths beyond the established limits are ignored. For a
pulse to finish historical period, it is also necessary that the Data communication be configured to allow
this. For more information, see the section Historical registers (pg.48).

VCC

GND

Pulse
length

Pulse length
(inverted input)

The figure shows pulse lengths when an input is inverted or non-inverted, respectively.
• Pulse input
To register pulses from pulse-producing units such as energy meters, pulse inputs are used. Incoming
pulses are accumulated in registers called external registers. There is an external register connected to
each input on the meter. For external registers, a factor is configured by which the number of incoming
pulses is multiplied. Prefixes and the number of decimals can also be configured for the registers.
Moreover, the registers can be configured with descriptive texts.
• Time synchronisation
When incoming pulses are received, the meter’s clock is synchronised at a specific interval For
available synchronisation intervals and more detailed information on time synchronisation, see the
section Meter clock (pg. 35).
• Rate input
Up to three digital inputs can be configured to control the active rate. Each input will correspond to a bit
and the significance is also defined for the digital input. A high level on the input will signify that the bit is
“1” while a low level will signify “0”. How the digital input levels are mapped to rates is defined in the
Time of use panel (pg.48).
7.5.1.1 Registration of pulses
A pulse must be at least 20 ms (for 50 Hz) and 16 ms (for 60 Hz) long to be guaranteed of being detected by the
meter. The maximum pulse width that the meter can handle is 300 ms.

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 7.5.2 Outputs
The outputs can be configured as follows:
• Not used
The output is not used.
• Energy Pulse output
The output is used to pulse an energy type that the meter is measuring. A multiplier is specified for the
output as pulses/unit and the pulse length is specified for all pulse outputs. The shortest possible pulse
length is 20 ms.

Pulse Gap

Maximum pulse frequency at outputs is limited so that the gap is at least as long as the pulse length.
• Long Pulse output
The output is used to generate long pulse whose length is between 2 to 15 seconds. By default, the
pulse length is set as 10 seconds. The long pulse output is used for the following functions:
o MD Register Change
On switching the MD registers, the output generates a long pulse.
o Rate Register Change
On switching the Rate registers, the output generates a long pulse.
o Billing Action
On performing billing action, the output generates a long pulse.
o DIP Start
At the start of a set demand integration period, the output will go active for the configured pulse
length before returning to the inactive state. See the section Maximum demand (pg. 47).
• Remote control
With this function, the output can be made active or inactive by sending commands to the meter via the
DLMS/PACT protocol. This function can be used to control anything that can be controlled with a digital
relay output. For this, it is also necessary that the Data communication be configured to enable remote
control.
• State Output
o MD Register
With this function, the output remains active or inactive for the time zones during which the
selected MD registers are activated.
o Rate Register
With this function, the output remains active or inactive for the time zones during which the
selected Rate registers are activated.
o Alarm output
When an output is set to function as an alarm output, one of the user-defined alarms can be
chosen to indicate at the output. When an alarm occurs, the output switches to active, and
when the alarm state ceases, the output returns to inactive. In the section Alarms (pg. 45), user-
defined alarms are described and how they can be configured.
Note that the outputs are inverted via firmware. If the meter loses its auxiliary power, the relay will open,
regardless of it is inverted or not.

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 7.5.2.1 Output states
An active output means a closed relay when the output is not inverted. When the output is inverted, the active
relay is open. The Prometer 100 outputs are of the solid-state type and when the meter is turned off, they are
open.
7.5.2.2 Meter variants

Inputs/Outputs Prometer 100-R Prometer 100-W

4 configurable input/output ● ●
8 outputs and 4 configurable input/output ●
7 outputs and 4 configurable input/output ●

7.6 Communications and Security

Prometer 100 meters have optical port, RS232, RS485 and Ethernet ports for communication.
Note:
The Prometer 100-W supports attachment of field replaceable communication modules for RS232 and RS485.
These modules are optional and can be procured separately.

Communication Default / Max Supported protocol Usage

channel supported Baud
rate
Optical port- IEC1107 300 / 19200 bps DLMS Local Meter Reading
Meter reading, online
RS485 (RJ-45 in & out) 9600 / 57600 bps DLMS, Modbus RTU monitoring, third party
interface
Remote meter reading
RS232 9600 / 57600 bps DLMS
through external modem
Meter reading, online
Modbus TCP (port no.: 502)
Ethernet port 10 / 100 Mbps monitoring, third party
DLMS TCP (port no.: 4059)
interface
Note: For more information on protocol support, see the document ‘Prometer 100 meter reading’.

7.6.1 Communication speed

The meter’s optical port always starts with a baud rate of 300 bps, regardless of what is configured, before
shifting over to the specified communication speed. This means that software (for example, M-Cubed) that
communicates with the meter via the optical port does not need to know the speed that the meter’s optical port
is set to. RS232 and RS485 communication ports differ in this respect. They start at the specified baud rate from
the beginning, which means that connected software must be aware of the speed to be able to communicate.
RS232 communication port can be set at a speed of between 9600 bps and 57600 bps, and RS485
communication port can be set at a speed of between 9600 bps and 57600 bps. The optical port can be set at a
speed of between 300 and 19200 bps.

7.6.2 Security
The meter has five authorisation levels that can limit access to the meter during communication via any of the
meter’s communication ports. Authorisation levels are password-protected.
Authorisation levels
1 Provides access to reading.
2 Provides access to everything in level 1 plus access to set the clock and
finish historical periods (also resets maximum demand values).

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 3 Provides access to everything in level 2 plus access to configure the
meter.
4 Provides access to everything in level 3 plus access to transfer new
firmware to the meter.
5 Provides access to everything in level 4 plus access to calibrate the
meter, reset registers and change certain security setting.
7.6.2.1 Limitation of total access attempts
The meter limits the total number of access attempts to six when incorrect passwords are entered. At the
seventh attempt, the meter blocks access whether the password is correct or not. The block is in effect until the
next hour shift. After that, new password attempts may be made.
7.6.2.2 Passwords
A password consists of up to 12 case insensitive alpha-numerical characters. The authorisation check may be
deactivated for a level by deleting the password. When connecting to the meter, access is granted to the highest
level that is lacking password regardless of the password given by the user.
If the setting ‘Require COP password compliance (min length 6)’ is activated, a new password is required to be
at least 6 characters. The setting can only be changed at access level 5.
7.6.2.3 Security settings
The following security settings modify what can be configured at what access level. The settings are of the type
active/not active, and can only be changed at access level 5.

 Permit measuring configuration only at level 5 If this setting is active, settings in the
measurement form can only be changed at
access level 5.
 Block configuration of transformer compensation If this setting is active, transformer compensation
cannot be changed at all.
 Block configuration of display sequence 4 If this setting is active, it is not possible to change
the content of display sequence 4, or change its
name or activation.
7.6.2.4 Access restriction for measurement configuration
Generally the meter allows to be reconfigured at access level 3. This function requires level 5 for measuring
configuration.

7.7 Loggers
The Prometer 100 has two identical, parallel and individually configurable loggers. That which is described in
this section applies both to logger 1 and logger 2.
7.7.1 Overview
A logger in a Prometer 100 can log values for instant quantities, energy registers and external registers. Some
quantities can be logged both by phase and as total values for all three phases, others only as total values. The
table provides an overview of quantities that can be logged. Certain instant values in the table are not available
in 2-element meters and thus cannot be logged; see the section Instant values (pg. 37). Logger Parameters can
be read as profile data and SIP wise.
Quantity Computation Method
Real Time Clock – Date and Time Instant
Active Import Total (Q1+Q4) Consumption
Active Export Total (Q2+Q3) Consumption
Active Import Fundamental (Q1+Q4) Consumption
Active Export Fundamental (Q2+Q3) Consumption
Reactive Import while Active Import – Q1 Consumption
Reactive Import while Active Export – Q2 Consumption

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 Reactive Export while Active Export – Q3 Consumption
Reactive Export while Active Import – Q4 Consumption
Apparent – While Active Import Consumption
Apparent – While Active Export Consumption
Reactive Import (Q1+Q2) Consumption
Reactive Export (Q3+Q4) Consumption
Reactive Inductive (Q1+Q3) Consumption
Reactive Capacitive (Q2+Q4) Consumption
Net Active (Imp – Exp)* Consumption
Net Reactive (Q1+Q2-Q3-Q4)* Consumption
Active Import Total (Q1+Q4) - Phase 1 Consumption
Active Import Total (Q1+Q4) - Phase 2 Consumption
Active Import Total (Q1+Q4) - Phase 3 Consumption
Active Export Total (Q2+Q3) - Phase 1 Consumption
Active Export Total (Q2+Q3) - Phase 2 Consumption
Active Export Total (Q2+Q3) - Phase 3 Consumption
Phase Voltage - Phase wise, Average 3 phase Min / Max / Avg / Instant
Line Voltage - Phase wise, Average 3 phase Min / Max / Avg / Instant
Line Current - Phase wise, Average 3 phase Min / Max / Avg / Instant
Active Power - Phase wise, Average 3 phase Min / Max / Avg / Instant
Reactive Power - Phase wise, Average 3 phase Min / Max / Avg / Instant
Apparent Power - Phase wise, Average 3 phase Min / Max / Avg / Instant
Power Factor - Phase wise, Average 3 phase Min / Max / Avg / Instant
THD Voltage (%) - Phase wise, Average 3 phase Min / Max / Avg / Instant
THD Current (%) - Phase wise, Average 3 phase Min / Max / Avg / Instant
THD Power (%) - Phase wise, Average 3 phase Min / Max / Avg / Instant
Frequency Min / Max / Avg / Instant
Voltage Angles Min / Max / Avg / Instant
Voltage Current Angles Min / Max / Avg / Instant
Voltage Harmonics - Phase wise, Average 3 phase (3rd,
Min / Max / Avg / Instant
5th, 7th, 9th, 11th, 13th and 15th)

Current Harmonics - Phase wise, Average 3 phase (3rd,

Min / Max / Avg / Instant
5th, 7th, 9th, 11th, 13th and 15th)

Pulse Input Counter (1 to 4) Instant

Status Flag (Time adjusted, Time disturbed, Alarm,
Parameter Changed, DST, Low / Missing Voltage, Battery Instant
and Power Loss)

Energy is logged as consumption. Instantaneous values can be logged as average, maximum, minimum and
instant value during the logging interval or as the instantaneous value at the end of the logging interval.
Maximums and minimums are detected based on 1 sec. interval snapshots, and average is calculated based on
1 sec. interval snapshots.
Notes:
• Maximum 50 parameters can be selected for each logger.
• Pulse input must be configured through ConfigView.
7.7.2 Logging interval and total channels
A logger can store data in 1 to 50 channels. The logging interval is common for all channels in a logger and it
can be configured from one minute up to one hour. A logger’s capacity is dependent on number of channels and
logging interval. For example, Prometer 100 meters can be configured to store 960 days of load profile data at
30 minutes SIP for 10 parameters. When the logger is full, the oldest values will be written over. The table
shows the capacity in number of days before the oldest value is written over.

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 Capacity in days
Number of logging channels

Logging
interval (min) 1 5 10 20 30 40 50
1 320 64 32 16 10 8 6
2 640 128 64 32 21 16 12
3 960 192 96 48 32 24 19
4 1000 256 128 64 42 32 25
5 1000 320 160 80 53 40 32
10 1000 640 320 160 106 80 64
15 1000 960 480 240 160 120 96
20 1000 1000 640 320 213 160 128
30 1000 1000 960 480 320 240 192
60 1000 1000 1000 960 640 480 384

Notes:
• Survey Integration Period (SIP) for Instantaneous parameters can be configured as 1, 2, 3, 4, 5, 10, 15,
20, 30 or 60 minutes.
• Survey Integration Period (SIP) for Energy parameters can be configured as 5, 10, 15, 20, 30 or 60
minutes.
• Maximum 1000 days can be configured

7.7.3 Storage of logged values

Logged values are saved with time stamps and flags that indicate events that have occurred during the logging
interval.
• The time stamp indicates the end-time. If the logging interval is configured to one hour, a value with the
time stamp 15:00 refers to the period 14:00 to 15:00.
• To indicate events or states during an interval, a logged value can be stored with one or more flags.
Event or state Name of flag Explanation
Time adjusted T During the past interval, the meter clock has been adjusted either instantaneous
or a sliding adjustment is in progress.
Time Disturbed D The past interval is incomplete. For example, an interval shortened by the meter
being without auxiliary power or if the logging memory has been reset. The first
value after the logging memory having been configured will thus always be
indicated with "Faulty value” (the logging memory is reset in conjunction with
reconfiguration).
Alarm A In conjunction with user-defined alarms being configured, it may be specified that
an alarm will also be indicated with logged values. When a user-defined alarm has
triggered during the past interval, this is indicated with the flag “Alarm”.
Parameter P The Prometer 100’s configuration, calibration or initiation has changed. Which of
changed these three the flag refers to can be seen in the event log.
Daylight savings S Daylight saving time has been in effect during the past interval.
time
Voltage V During the past interval all measuring voltages have been lost or missing.
loss/missing
Field B Estimated battery lifetime is up.
Replaceable
Battery (for meter
reading/ RTC
backup)
Power loss O During the past interval, the meter has been without auxiliary power.

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 For several of the flags, additional information can be viewed in the event log. A more exact time for events
is specified in the log.
Note: When power is calculated from logged energy values, the resulting values will be somewhat more precise
than when power is logged directly. This is because power is logged as an average value of instant values. The
instant values are read twice per second, while energy is accumulated continuously.

7.8 Alarms
The Prometer 100 is equipped with alarms to be able to indicate when measured quantities are over or under a
factory configured limit value. The meter enters the alarm state when the limit value is reached. An alarm is
generated only after the alarm state has continued for a configurable time (persistence time). Alarms are
configurable by the user and are therefore called user-defined alarms. The persistence time can be configured
to a maximum of 60 minutes.
Note: There are alarms and events that cannot be configured, but instead, are always active. Examples of such
alarms are indication that the clock has been changed or that an auxiliary power loss has occurred. For more
information, see the section Display of events (pg. 46).

7.8.1 Overview
For most user-defined alarms, the limit value is specified as a percentage of the nominal value, which is the
configured, nominal primary value (current, voltage or power). For 3-element meters, the limit value corresponds
to phase voltage, and for 2-element meters, phase to phase voltage. The following table provides an overview
of available alarms.

Alarm Description
Alarm can be configured for low voltage event. Occurred condition is treated as
Low voltage
alarm condition.
Alarm can be configured for high voltage event. Occurred condition is treated as
High voltage
alarm condition.
Alarm can be configured for voltage unbalance event. Occurred condition is
Voltage unbalance
treated as alarm condition.
Alarm can be configured for current unbalance event. Occurred condition is
Current unbalance
treated as alarm condition.
Alarm can be configured for voltage THD event. Occurred condition is treated as
High THD voltage
alarm condition.
Alarm can be configured for current THD event. Occurred condition is treated as
High THD current
alarm condition.

High THD power Average value of THD for all power phases exceeds the limit value.

Any phase voltage Alarm can be configured for PT miss event (any phase). Occurred condition (any
missing phase) is treated as alarm condition.
Frequency healthy Frequency is (< 49 Hz or >= 51 Hz) or (<59 Hz or >= 61 Hz)
Auxiliary power
Any auxiliary supply fails
supply fail
Low power factor System power factor is below limit value.
Low active power System active power is below limit value.
High active power System active power is above limit value.
nd st
Any phase voltage individual harmonics value (2 to 31 ) is above limit value.
nd st
Single harmonic Every 5 second meter will scan 2 to 31 harmonic values for one phase and in
high voltage next 5 sec meter will scan for next phase. Hence resolution of checking for each
phase is 15 second.

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 nd st
Any phase current individual harmonics value (2 to 31 ) is above limit value.
nd st
Single harmonic Every 5 second meter will scan 2 to 31 harmonic values for one phase and in
high current next 5 sec meter will scan for next phase. Hence resolution of checking for each
phase is 15 second.
Internal error / In case of internal failure like RTC fail (as per event logged), Memory fail (as per
Health Status event logged), Battery fail or System status.
Internal RTC In case of internal RTC battery fail (Simulated battery failure alarm shall be
battery fail provided)
Phase wise low
Phase voltages is beneath the nominal voltage - limit value
voltage
Phase wise high
Phase voltages is above the nominal voltage - limit value
voltage
Phase wise low
Phase wise power factor is below limit value.
power factor
Reverse energy Alarm can be configured for CT reverse event (any phase). Occurred condition
direction (any phase) is treated as alarm condition.
Note:
• Two LEDs are available for alarm information.
• Multiple alarms can be selected on single LED.
• Events selected only for alarm, shall not log event. For logging purpose event has to be selected in
event log section.

7.8.2 Indication
Alarms can be configured to indicate in one or more of the following ways:
• Alarm LED on meter front
• Changed digital output level
• Indication of a logged value with a flag
The alarm LED stops flashing and the digital output returns to inactive low after the alarm state passes.

7.8.3 Display of events

The events status can be viewed on the meter’s display if the tamper information displays are configured to be
included in one of the meter’s display sequences. A more detailed description of the meter's events can be
viewed in M-Cubed. Via M-Cubed, the event log can also be printed out or saved to a file.

Maximum Snapshot
number of
Sr.No Fixed Compartment Events
events per
compartment
1 Phase wise PT Miss
2 Over Voltage
3 Under Voltage Y
1 100
4 Voltage Unbalance

5 Phase wise CT Reversal

6 Phase wise CT Open (HT
2 Meter Only) 100 Y
7 CT Bypass (HT Open Only)
8 Current Unbalance
9 Power Fail / Power On-Off
3 100 N

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 10 Time Set Transactions
11 Profile Capture Period
4 Transaction for logger 1 100 Y
12 Profile Capture Period
Transaction for logger2
13 Neutral Disturbance
5 100 Y
14 Magnet Interference
15 Cover Open (In case of cover
open during power fail
6 duration, time stamp and 100 Y
snapshot will be logged at
power up time)
16 Device ID Change
17 Password Change
18 AES Key Change
19 Immediate Tariff Download
20 Feeder Supply Fail
21 7 Tamper Reset 100 N
22 Scaling Tariff Download
22 Remote control IO switch
transaction
23 Energy register reset
transaction
23 MD reset transaction
24 CT Miss
25 8 Invalid Phase Association 100 Y
26 Invalid Voltage
27 RTC Fail
9 100 N
28 Memory Fail
29 10 Phase wise Voltage THD (%) 100 Y
30 11 Phase wise Current THD (%) 100 Y

For snapshot refer to Appendix G

7.9 Maximum demand

Maximum Demand (MD) plays a crucial role in current scenario of electricity conditions. According to maximum
demand conditions it is easy to monitor variation in the load condition and trend of load according to the time
zone.
The Prometer 100 meter has the capability of logging Maximum Demand for all the selected energy types
(except Net Active and Net Reactive). The Maximum Demand is computed for a fixed block of time which is
called Demand Integration Period (DIP). DIP can be set to 5, 10, 15, 20, 30 or 60 minutes.
Maximum Demand registers are provided for each individual energy type. A separate register is available to
record the Maximum Demand during the entire day (i.e. 00-24 hours). This is known as the Universal Demand
Register. This is not configurable through the tariff.
The rules for logging Maximum Demand in these individual register may be set on the following basis:
As per Time Zone: In this case the individual MD registers are assigned to a specific time zone of a day. A
particular MD is active in the assigned Time Zone only. In such case the MD register are called TOD MD
register.
MD reset button: User can trigger the Maximum Demand by use of MD reset button provided under the front
cover of the meter.
Please note that the Maximum Demand in any MD register is for the current billing period and is always reset to
zero whenever a billing cycle is finished.

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 7.10 Historical registers
Historical registers are used by the Prometer 100 to store current register values at defined points so as to be
able to read them later. Stored in historical registers are all maximum demand values, TOU registers and
energy registers, with the exception of energy registers by phase. The historical registers are time stamped to
indicate when storage occurred. The Prometer 100 can store up to 15 historical registers.

Date and time

Energy registers Maximum demand

values

Time of use registers

7.10.1.1 Finish historical period

By finishing a historical period, the current registers values are stored in historical registers and the maximum
demand values are reset. When a period is finished, an event is stored in the meter’s event log. Periods can be
finished in various ways:

• Via meter push button

The period is finished when the meter’s MD Reset button is
pressed.
This requires that the historical registers are configured to permit
finish via the meter button.
• Via M-Cubed
The period is finished when a command is given from M-Cubed or
third-party software.
• At any configured billing
The period is finished when the meter clock reaches the
date
configured billing date

• Via digital input

The period ends when a pulse is received at a digital input on the
meter.

This requires both that the historical registers are configured to

permit ending via a digital input and that an input is configured for
this purpose.

7.10.1.2 Lock out time for finish historical period

The Lock out time prevents the user to create a new historical period within a configured time. It can be
configured from 1 hour to 40 days.

7.11 Time of use

Time of use is a function that enables energy to be divided up into various registers depending on the rate that
applied when the energy was measured. In the Prometer 100, tariff structure can be stored that switch rates at
predetermined times according to a configurable pattern. A tariff structure consists of seasons, day types and
holiday dates. The maximum number of rates is eight.
• Day types specify how rates change during a 24-hour day.
• Seasons specify the day types that apply during the days of the week, Monday to Sunday.
• Holiday dates specify the day type that applies on a certain date.
• Rate input can be used to control active rate depending on the state of digital input signals.

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 7.11.1 Day type
Prometer 100 supports up to 16 day types. A day type specifies which rate, from a maximum of eight, should
apply when during the day. A day can have up to 16 changing points. A day type can be connected to a day of
the week in a season or to a holiday date.

7.11.2 Season
A season refers to a period. During this period, the season defines the day types that will apply during the days
of the week. Prometer 100 supports up to 16 separate seasons. The seasons are arranged in a sequence
where one season replaces the previous at a predetermined date.

7.11.3 Holiday dates

Days that change rates according to a pattern that is not covered by linking day types to seasons are called
holiday dates. A holiday date specifies the day type that applies on a certain date. Holiday dates can be
configured to apply every year on the same date or for a single year. In the Prometer 100, up to 30 holiday
dates can be configured.

7.11.4 TOU registers

An energy register that is chosen to be divided into the rates is a TOU register. There are 14 TOU registers and
each TOU register has separate registers for eight rates.

7.12 Billing Cycle Support

The concept of energy metering essentially consists of billing cycles. Prometer 100 has an inbuilt support for
billing cycle.

7.12.1 Billing Cycle

The Prometer 100 provides following ways to perform a billing action. Performing a billing action finish current
billing cycle and starts a new billing cycle.
• According to billing dates specified in Tariff file. A billing action from a billing date is done at the start of
the day on the nominated date file
• At the time of Tariff activation i.e. whenever a new tariff is activated.(Downloading of new tariff having
change in energy channels, scaling and TOU)
• By pressing MD Reset button
• Authenticated command for MD Reset from M-Cubed.
Note: The lock out time prevents the user to perform a billing action within a configured time.

7.12.2 History of Energy, Rate and MD Register

Following values are stored in the meter memory each time a billing cycle completes i.e. a billing action is
performed.
1. Values of all main Energy Registers at the time of a billing action. This is maintained in a rollover
fashion which may have a maximum of 15 histories .i.e. all last 15 historical values will be available to
you.
2. Values of all Rate Registers. This is maintained in a rollover fashion which may have a maximum 15
histories .i.e. all last 15 historical values will be available to you.
3. Values for all MD Registers along with Date & Time of MD occurrence. This is also maintained in a
rollover fashion which may have a maximum 15 histories .i.e. all last 15 historical values will be
available to you.

7.12.3 History for the Cause of Billing Register

The cause of billing is available on display in the meter for last 15 billing actions along with date & time of billing.

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 7.12.4 Cumulative Maximum Demand Registers
A special register is also provided for energy type selected for maximum demand which stores cumulative
Maximum Demand for all MD register whenever a billing action takes place. Each time Billing Action takes
place, the cumulative register shall increase by the value of their source register.
The purpose of this register is to limit the scope of tampering with Maximum Demand by performing a billing
action repeatedly.

7.13 Meter Reading

The Prometer 100 uses DLMS for meter reading. In DLMS protocol the BCS is considered the client and the
meter is the server. On request by the BCS, the meter will send all its supported OBIS codes and expected
queries. All DLMS meters will communicate data only after ‘getting associated’ with the BCS client. Meter
reading is divided in to the following sessions:
Single parameter sessions
Profile sessions
1. Instantaneous profile reading
2. Midnight energy profile reading
3. Load survey profile reading
4. Log wise events profile reading

7.14 Scaling Tariff

The Prometer 100 Scaling Tariff supports CT / VT ratio adjustment, and CT-VT error compensation in the field.
The M-Cubed is used for preparing the scaling tariff. The existing meter configuration must first be opened and
read. The configuration can then be modified using the M-Cubed. The Prometer 100 does not require to be
switched off during the configuration mode and will only implement the new configuration when all the blocks
have been received and authenticated.
The Scaling Tariff contains the following sections:
1. Commissioning
2. Error Compensation
In a single scaling tariff, commissioning change and error compensation is treated & logged as three separate
transactions.
It is also possible to download a scaling tariff in meter using a suitable tool. Complete meter data will be washed
out by applying scaling tariff in meter.

7.15 Transformer compensation

Transformer compensation is a function for compensating for measurement errors in instrument transformers
and for losses in power transformers. The function enables the Prometer 100 to present measurement values
for which errors and losses have been compensated. The formulas used in the meter are presented in Appendix
E: Calculation Principles (pg. 61).
Changing the transformer compensation can be blocked by the security setting ‘Block configuration of
transformer compensation’. This setting can only be changed at access level 5.
7.15.1 Overview
The tables present an overview of the transformer compensations in Prometer 100.
Instrument transformer compensations
Name Value to be entered
Voltage error L1, L2, L3 Amplitude error as percent
Phase angle in minutes
Current error L1, L2, L3 Amplitude error as percent
Phase angle in minutes

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 Power transformer compensations
Name Value to be entered
Copper losses, Total values Active loss as percent of nominal power
Reactive loss as percent of nominal power
Iron losses, Total values Active loss as percent of nominal power
Reactive loss as percent of nominal power

7.15.2 Instrument transformer compensations

To compensate for errors in instrument transformers, their amplitude error in percent and phase angle error in
minutes are configured in the meter. One minute is equal to the angle 1˚/60. The errors can be specified
separately for all voltages and currents. When instrument transformer compensations are used, current and
voltage are affected, as well as all quantities that arise from these: power, energy, etc.
7.15.2.1 2-element meter

When voltage errors are compensated on a 2-element meter, this is done on phase to phase voltages L12, L23
and L31 instead of on phase voltages. Only L12 and L23 are included in the calculation of power and energy.
Compensation of L31 has no significance in this respect. In compensation of current errors for 2-element
meters, only L1 and L3 can be compensated for because they are the only currents measured.

7.15.3 Power transformer losses

Power transformer losses consist of copper and iron losses. They are expressed as percentages of nominal
power. One value is specified for active loss and one for reactive. When compensation of losses is configured,
power, energy, power factor, etc. are affected but not current and voltage.
When copper losses are added per phase, the resulting copper loss is the average of the value.
Calculating loss values
Based on the nominal total power and the measured loss value in watts, a loss value can be calculated as a
percentage of nominal power. It is the loss value that is configured in the meter. Nominal power is calculated
with configured nominal current and voltage.

Nominal power: Powernom = Current nom ⋅ Line voltagenom ⋅ 3

Loss value: Loss value = Loss / Powernom ⋅ 100

7.16 Quality of Supply

Power quality encompasses voltage monitoring and harmonics measurement. Harmonics measurement is
described in the section Instant values (pg. 37).

7.16.1 Voltage monitoring

Voltage monitoring monitors the following states: swells (overvoltage), sags (under voltage), unbalance and
interrupts. Monitoring is enabled by checking the check box and configuring limit values for the events. The
occurrence and restoration limits are expressed as percentages of configured nominal voltage.
Example: For an occurrence limit of 110% and a restoration limit of 90%, and the configured nominal primary
voltage of 10 kV, the limits attained are 9 kV and 11 kV.
These events are monitored phase wise every second. For 3-element meters, the average value for phase
voltage is monitored, and for 2-element meters, the average value for phase to phase voltage is monitored.
The states shorter than three seconds are registered by accumulating registers. If the states last longer than
three seconds, they are instead registered in the event log with time stamp and duration. The accumulating
counters and the event log can be read in M-Cubed.

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 State Duration Registered in Duration presented as
1s–3s Accumulating counter Duration not specified
3 s – 60 s Event log Duration of state
Event log as
Sags / Swells /
Low voltage (for Sag)
Interrupt / Unbalance Duration of state
> 60 s High voltage ( for Swell)
Feeder fail (for Interrupt)
Voltage unbalance (for unbalance)

Note: If voltage interrupt condition persists, then voltage sag and voltage unbalance conditions are not
monitored.

Appendix A: Abbreviations
The following are commonly occurring abbreviations used throughout this manual.

APS: Auxiliary Power Supply

BCS: Base Computer Software

DLMS: Device Language Message Specification

SCADA: Supervisory Control and Data Acquisition

MD: Maximum Demand

UMD: Universal Maximum Demand (0 to 24 hours)

Appendix B: Material Declaration

The material declaration for the Prometer 100-R is shown below:

Enclosure Rack Mild steel with Aluminium

Meter Enclosure Mild steel

Meter back plate Mild steel

Meter current and voltage terminals Brass with gold and silver plating

Handle Mild steel

Screws M3 for sealing meter with rack and M4 elsewhere

Front Cover PC (Polycarbonate)

Front hinged plate PC (Polycarbonate)

*Rack carries the female part of Essailec connector and meter carries the male part of Essailec connector with
all the back side communication ports in the form of RJ45 connector.

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 The material declaration for Prometer 100-W is shown below:

Enclosure PC FR (Polycarbonate Fire retardant)

Meter current and voltage terminals Brass with nickel plating

Sealing screws Brass with nickel plating

Appendix C: Communication Ports

The Prometer 100 can come as fitted with the following ports (see the variant supplied as per order):
1. Optical 1107 port
2. RS232/RS485 – Left Module
3. RS232/RS485 – Right Module
4. Ethernet

Optical Communication Port

In Prometer 100-R, the optical 1107 port is protected by a sliding cover. The 1107 optical port cover can be slid
upwards in the arrow direction to the open position. The cover has a captive design and cannot be removed and
lost. There is an optional sealing point. While in Prometer 100-W, the optical 1107 port is protected by a
rotational seal.

Sealing Points

Cover Closed Cover Open

Figure 24: Optical 1107 Port in Prometer 100-R

Figure 25: Optical 1107 Port in Prometer 100-W

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 Communication through the 1107 infrared optical communications port is performed through PC with suitable
communication cable. Care has to be taken to align the opto head so the IR transmitters and receivers are in
the best position to exchange signals. Usually this means attaching the opto head with the connecting wire
hanging straight down. Ambient visible light (daylight, incandescent or in particular fluorescent light) may disturb
the exchange of IR signals if strong enough and cause the communication to fail. To ensure reliable
communications, avoid strong ambient light positions when installing the Prometer 100.

RS232 Serial Communication Port

The RS232 communication port is used for connecting to communication equipment such as computers and
modems through a serial cable. The meter side connector is an RJ-45 type. The user should ensure that the
other side is fitted with a suitable connector before connecting an external device with the meter. See Figure 26
for pin description.

RS485 Serial Communication Port

The RS485 serial half duplex communication ports are intended to be used to connect the Prometer 100 to a
network for multi-drop communications. The RS485 network is looped through the input connector to the output
connector. See Figure 4 for pin description. If for example three meters needed to be “daisy chained”, then
simply connect the “RS485 Out” on the first meter to the “RS485 In” on the next meter and so on. The pin
connection for both ports is identical, so the same type of cable can be used through-out and is not polarity
conscious.

Ethernet Port

The Ethernet serial communication port is used for connecting directly to an internal Ethernet network. Each
meter needs to be provided with an IP addressed static to internal LAN for communicating the data over TCP/IP
network. See Figure 26 for pin description.

Figure 26: Pin Description for RJ-45 Ports

Note- Recommended cable to use with all the above mentioned ports (RJ-45) is CAT6 type and shall be
crimped with standard tools used in LAN connection to PC/ Laptop. The other end of the cable should be as
desired by customer for its intended application like connecting to Modem or PC or LAN switch etc. In general,
all the communication ports in meter are optically isolated with each other and can be configured by M-Cubed
for data settings, TCP/IP settings etc. as desired by user. The Ethernet cable is normally connected between
the meter and the main switch, although local IP installations may differ.

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 The Ethernet port has a 1-minute inactivity time-out period. If no activity is detected the Ethernet port will
disconnect after 1 minute.

Appendix D: How to Read Meters through Ethernet Port

This section discusses the reading a Prometer 100 meter through Ethernet port (TCP/IP connection).

Prerequisites:

Take static IP address, Subnet Mask and Gateway from network

M-Cubed (6.0.0.6)
Install the M-cubed on PC
Connect meter with PC using optical port or RS232 port

Configuring the static IP address, Subnet Mask and Gateway

Connect Prometer 100 meter with PC on optical port

Select connection media, protocol, comport and baud rate. Click OK.

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 Check successfully connected

Click Transaction and then click TCP/IP Configuration

Enter the IP address, Subnet Mask and Gateway information to be configured in meter.

Click OK

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 IP configured successfully.

You can verify on the meter display.

Go to the Fixed Display Page

Scroll down to view the Ethernet

configuration information

Reading the Prometer 100 Meter on the Ethernet port

Connect the meter with the LAN network using the LAN cable.
Confirm that the LAN cable is firmly connected to both the meter and PC Ethernet ports.

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 Click Connect and then select connection media as TCP/IP, communication type as DLMS. Select the
checkbox “Use TCP profile over Ethernet port.”

Enter the meter static IP information in Connection Address

Click OK.

Static IP is 172.16.13.5
Service port is 4059. It is fixed for DLMS

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 Meter connected successfully with the M-Cubed.

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 To read data, click Get All Data

Action completed successfully will be displayed.

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 Appendix E: Calculation Principles
(to be updated)

Current and Voltage

Current and voltage are first harmonic component (fundamental).

Calculated phase to phase voltage

Phase to phase voltage is calculated from the phase voltages’ fundamental vectors. This calculation is only
made in the 3-element meter; in the 2-element meter, the phase to phase voltage is measured.

U 121 = (U 112 + U 212 − 2 ⋅ U 11 ⋅ U 21 ⋅ cos(U 11 p − U 21 p)

Calculated I2
In the 2-element meter, I2 is not measured but is calculated for monitoring purposes. It is calculated from the
current’s fundamental vectors.

I 21 Current I2’s fundamental harmonic.

I 21 = ( I11 + I 31 ⋅ cos( I11 p − I 31 p )) 2 + ( I 3 ⋅ sin( I11 p − I 31 p )) 2

Voltage unbalance
Class A
The basic measurement of voltage harmonics, for class A, is defined in IEC 61000-4-7 class I. That standard
shall be used to determine a 10/12-cycle gapless harmonic subgroup measurement, denoted U isg,h in IEC
61000-4-7.

Power

Harmonic component power

The calculations below are for active power, the calculations for reactive are identical except for that cos-
functions are replaced with sin-functions.

P1n Active power in L1 is calculated for harmonic component n.

Pn Total active power is calculated for harmonic component n.

ϕn Phase angle between harmonic component

U1n and
I1n

3-element meter:

P1n = U 1n ⋅ I1n ⋅ cos(ϕ n )

2-element meter:
For 2-element meters, only the total power is calculated in each harmonic component.

ϕ1n Phase angle between harmonic component U12 n and I1n

ϕ 2n Phase angle between harmonic component U 32 n and I 3n
Pn = U 12 n ⋅ I1n ⋅ cos(ϕ1n ) + U 32 n ⋅ I 3n cos(ϕ 2 n )

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 Active and reactive power
Active and reactive power is calculated as the sum of harmonic component power up to 31st harmonic. The
calculation is made with plus and minus signs, where negative power represents export direction and positive
represents import direction.
P Total active power
P1 Active power in L1
Q Total reactive power

Q1 Reactive power in L1

P = P1 + P 2 + P3
Q = Q1 + Q 2 + Q3
For 2-element meters, two elements are added instead of three.

Apparent power
S Total apparent power

S1 Apparent power in L1

S = P2 + Q2

S1 = P12 + Q12

Energy
Energy is calculated by integrating power (P, Q and S) over time.
Definition of quadrants
The term phase angle is described under its own heading below.
Quadrant I: phase angle 1–90°
Quadrant II: phase angle 90–180°
Quadrant III: phase angle -180–(-90)°
Quadrant IV: phase angle (-90)–0°

Active energy
Active energy is calculated for import and export. The direction is controlled by the sign for active power
(+ import, – export).
Active energy import: quadrant I and IV
Active energy export: quadrant II and III

Reactive energy
Reactive energy is calculated for four quadrants. The quadrant is controlled by the sign for active and reactive
power (e.g., active power >= 0 and reactive power >= 0 corresponding to quadrant I).
Reactive energy import: quadrant I and II
Active energy export: quadrant III and IV

Reactive energy inductive: quadrant I and III

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 Reactive energy capacitive: quadrant II and IV

Apparent energy
Apparent energy is calculated for import and export. The direction is controlled by the sign for active power;
apparent energy is registered for the direction that the active energy has during the same period.
Apparent energy import: quadrant I and IV
Apparent energy export: quadrant II and III

Power Factor
pf ( L1) = P1 / S1

pf (Tot ) = P / S
The power factor is calculated without signs and is thus always positive.

Phase angle
ϕ ( L1) = U 1 p − I1 p
Phase angle for an element is calculated from the fundamental phase angles.

ϕ (Tot ) = arctan( P1 fund / Q1 fund )

Total phase angle is calculated from fundamental power.
Phase angle values specified between –180 ° and 180°.

THD
Total harmonic distortion

I 22 + I 32 + ...I n2
THDeur = ⋅ 100%
I 12 + I 22 + ...I n2−1

Where I 1 … I n are the current’s harmonic components. The calculation is made in the same ways for current
and voltage.

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 Transformer Compensations

Instrument transformer compensations

Instrument transformer compensations are specified as error in percent for amplitude, and as error in minutes
(one-sixtieth of a degree) for phase angle. These errors can be specified separately for all voltages and
currents.
AmpErr Amplitude error as percent

PhaseErr Phase angle error in minutes

u meas Measured voltage

u Compensated voltage

Amplitude compensation
u = u meas /(1 + AmpErr )

Phase angle compensation

up = up meas − PhaseErr
In 3-element meters, phase voltages are compensated and in 2-element meters, phase to phase voltages. The
same calculation is used for all currents and voltages.

Power transformer losses

Power transformer losses consist of copper and iron losses. They are expressed as percentages of nominal
power. One value is specified for active loss and one for reactive.

Iron loss
FeLoss Active iron loss as percent of nominal power.

P1meas Measured power.

P1 Compensated power.
Nom Nominal power per phase

P1 = P1meas + FeLoss ⋅ Nom

Copper loss
CuLoss Active copper loss as percent of nominal power.
i Phase current.

inom Nominal current.

P1 = P1meas + (i / inom ) 2 ⋅ CuLoss ⋅ Nom

Corresponding calculations made for active and reactive power.

Definition of phase order

Correct phase order (123) corresponds to phase position:
U1 p Phase position for U1

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 U 1p = 0°
U 2 p = −120°
U 3 p = 120°
The same system is represented graphically below. The vectors rotate in an anti-clockwise direction.

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 Appendix F: Connection and General Details

Electrical
Connection type Common product for HV3/HV4/LV4 applications
Wiring configuration 3-phase 3-wire, 3-phase 4-wire
57.7/100 V to 69.3/120 V (configurable) for HV3 & HV4
Voltage range (L-N/L-L)
240/415 V for LV4 (applicable for Prometer 100-W only)
I b : 1-5 A (configurable)
Current range
I max : maximum 10 A (configurable)
Accuracy Class 0.2s and 0.5s
Mains frequency 50/60 Hz ± 5%
If power drawn from Aux supply –
<0.1 VA /phase (for voltage and current circuit)
<10 VA (burden on Aux supply)
Burden
If power drawn from VT (i.e. self powered) –
<0.1 VA /phase (for voltage and current circuit)
<6 VA /phase (burden on VT supply)
STOC 10 times I max for 1 second
Compliance
IEC62052-11, IEC62053-22, IEC62053-23, IEC62056-52, IEC61010-1,
Standards
IEC61010-2-030, CE, MID (EN50470-1, EN50470-3)
Mechanical
Prometer 100-R
428 x 133 x 260 mm approx. (meter with 19” rack)
Dimensions (L X W X D)
299 x 133 x 260 mm approx. (meter with 11” rack)
Translucent polycarbonate cover (with clear transparent window for display)
Enclosure
and overall mild steel body
Sealable screws on the front and back fascia of meter, sealing provision for
Sealing
optical port and MD reset button
Meter – 3.8 kg approx. (± 1 kg)
Weight 11” rack – 2.1 kg (± 0.1 kg)
19” rack – 3.3 kg (± 0.1 kg)
Ingress Protection (IP) IP53 on front fascia and IP20 on back side
Prometer 100-W
Dimensions (L X W X D) 300 x 200 x 100 mm (± 5 mm)
Enclosure Plastic material (type Polycarbonate)
Sealing Sealable base and cover
Weight 2.5 kg approx. (± 0.5 kg)
Ingress Protection (IP) IP53 and IP54 with panel mounting kit over the front fascia

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 Environmental
0 0
-10 C to + 60 C (operating)
0 0
-25 C to + 70 C (limit range of operation)
Temperature 0 0
-40 C to + 80 C (storage)
0 0
-20 C to + 70 C (display operating range)
Humidity 95% non-condensing
Pollution degree Type 2
Over voltage category III

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 Appendix G: List of DLMS Parameters

List of Profile Parameters (DLMS)

Section : Event Log 1 to 9 Snapshot Profile
Sr.No Profile Parameter
1 Instantaneous Real Time Clock – Date and Time
2 Instantaneous Cumulative Energy – Active Import
3 Instantaneous Cumulative Energy – Active Export
4 Instantaneous Voltage – VRN for 3Ф4W / VRY for 3Ф3W
5 Instantaneous Voltage – VYN for 3Ф4W
6 Instantaneous Voltage – VBN for 3Ф4W / VBY for 3Ф3W
7 Instantaneous Line Current – IR
8 Instantaneous Line Current – IY
9 Instantaneous Line Current – IB
10 Instantaneous Active Current – IR
11 Instantaneous Active Current – IY
12 Instantaneous Active Current – IB
13 Instantaneous Power Factor – R phase
14 Instantaneous Power Factor – Y phase
15 Instantaneous Power Factor – B phase
16 Instantaneous Voltage angle – Angle between R and Y phase
17 Instantaneous Voltage angle – Angle between Y and B phase
18 Instantaneous Voltage angle – Angle between B and R phase

List of Profile Parameters (DLMS)

Section : Event Log 10 Snapshot Profile
Sr.No Profile Parameter
1 Instantaneous Real Time Clock – Date and Time
2 Instantaneous Cumulative Energy – Active Import
3 Instantaneous Cumulative Energy – Active Export
4 Instantaneous Voltage THD % - Phase 1
5 Instantaneous 3rd Harmonic Voltage - Phase 1
6 Instantaneous 5th Harmonic Voltage - Phase 1
7 Instantaneous 7th Harmonic Voltage - Phase 1
8 Instantaneous 9th Harmonic Voltage - Phase 1
9 Instantaneous Voltage THD % - Phase 2
10 Instantaneous 3rd Harmonic Voltage - Phase 2
11 Instantaneous 5th Harmonic Voltage - Phase 2
12 Instantaneous 7th Harmonic Voltage - Phase 2
13 Instantaneous 9th Harmonic Voltage - Phase 2
14 Instantaneous Voltage THD % - Phase 3
15 Instantaneous 3rd Harmonic Voltage - Phase 3
16 Instantaneous 5th Harmonic Voltage - Phase 3
17 Instantaneous 7th Harmonic Voltage - Phase 3
18 Instantaneous 9th Harmonic Voltage - Phase 3

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 List of Profile Parameters (DLMS)
Section : Event Log 11 Snapshot Profile
Sr.No Profile Parameter
1 Instantaneous Real Time Clock – Date and Time
2 Instantaneous Cumulative Energy – Active Import
3 Instantaneous Cumulative Energy – Active Export
4 Instantaneous Current THD % - Phase 1
5 Instantaneous 3rd Harmonic Current - Phase 1
6 Instantaneous 5th Harmonic Current - Phase 1
7 Instantaneous 7th Harmonic Current - Phase 1
8 Instantaneous 9th Harmonic Current - Phase 1
9 Instantaneous Current THD % - Phase 2
10 Instantaneous 3rd Harmonic Current - Phase 2
11 Instantaneous 5th Harmonic Current - Phase 2
12 Instantaneous 7th Harmonic Current - Phase 2
13 Instantaneous 9th Harmonic Current - Phase 2
14 Instantaneous Current THD % - Phase 3
15 Instantaneous 3rd Harmonic Current - Phase 3
16 Instantaneous 5th Harmonic Current - Phase 3
17 Instantaneous 7th Harmonic Current - Phase 3
18 Instantaneous 9th Harmonic Current - Phase 3

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 Frequently Asked Questions (FAQs)
The message ‘Not configured’ is shown on the Prometer 100 display.
The message ‘Not configured’ is displayed when the parameters are not configured in the meter.
For e.g, Bar Graph of Energy parameter for the logger will be available on meter display if user configures
logger energy in meter. Similarly Rate Registers and Demand Registers will be available if user configures TOU
energy in meter.

Is it possible to have different IDs for the two RS485 communication modules attached to the meter?
For DLMS, different IDs can be used for both the RS485 communication modules. While for Modbus, same IDs
will be used for both the RS485 communication modules.

st
Are the harmonics data up to 31 order available on meter display?
st
The voltage and current harmonics data up to 31 order is not available on meter display and can be accessed
using M-Cubed 100 and via the communication protocol.

Which information is not available on the Prometer 100’s display for 3-phase 3-wire?
On configuring Phase 2 displays for 3-phase 3-wire, the Phase 2 parameters such as energy, voltage, current,
Power, P.F, harmonics, L1-L2 voltage phase angle, L2-L3 voltage phase angle and current symmetry data will
be displayed as “……..”.

Which events are not applicable for 3-phase 3-wire?

Phase 2 current reversal, Phase 2 current miss, CT open, CT bypass, neutral disturbance and invalid phase
association are not applicable for 3-phase 3-wire.

Will the existing meter data reset on changing configuration?

The existing meter data will be reset on configuring/changing existing energy channels, logger parameters or
scaling information in meter.

What happens if a new successive adjustment is made when one is already underway?
The current adjustment will be stopped and the new begun.

When summer time starts, the clock jumps one hour. What happens if the user sets the meter to a DST
time within that hour?
The meter will ignore the new time because that hour “does not exist”.

Is logger’s data affected by daylight saving time change? What data is affected by daylight saving time
change?
No, the logger’s data will not be affected by the daylight saving time change as the loggers, events and daily
energy snapshot are logged as per base time. The daylight saving time is applicable only for TOU rate registers,
TOU demand data and billing data.

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 Can user set meter clock via Modbus communication protocol?
Time set transaction as per base time or DST time will be provided via DLMS communication protocol.
Only time synchronization as per base time or DST time will be provided via Modbus communication protocol.
Meter will reject the time sync request if it is above time adjustment limit.

What is the maximum time adjustment limit and how it works?

Time synchronization as per base time or DST time will be provided via Modbus communication protocol only.
Meter will not sync the time if the time difference is more than the time adjustment limit configured in the meter.
By default, the time adjustment limit is set as 25 seconds. The time adjustment limit can be configured as any
value between 0 to 30 seconds using ConfigView.
So, if user wants to change the meter time out of time adjustment limit then time set transaction has to be
performed via DLMS communication protocol.

How the logged values affected by the daylight saving time change?
Logged values during daylight saving time are labelled with the flag “Yes”. “Yes” means that the DST offset is
applied in the meter.

What are the possible consequences of adjusting forward the meter clock?
If the clock is adjusted forward over one or more interval limits, there will be empty spaces filled by zero value in
the logging memory.

What are the possible consequences of adjusting backward the meter clock?
It the clock is adjusted backward over one or more interval limits, one or more values will exist with the duplicate
day and same time stamps. Empty spaces will be filled by zero value in duplicate day. In the worst event, this
can result in data read from the meter not matching the expected period. Previous integration period and rising
demand data will be reset.

What are the possible consequences of adjusting backward or forward the meter clock within time
adjustment limit?
Integration period will be compressed for forward time sync and stretched for backward time sync. Data will be
logged as per integration period.

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 Cewe Instrument AB
Box 11006,
SE 611 29 Nyköping
Sweden
t: +46 155 775 00
f: +46 155 775 97
UK contact details
t: +44 (0) 1962 840048
f: +44 (0) 1962 841046

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