Iskra WM1-6A User manual

User’s Manual
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Energy meters WM1x6A
Single-phase electrical energy meter
WM1-6A
Single-phase electrical energy meter
WM1M6A
December 2021 • Version 1.01

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User’s Manual
Single-phase electrical energy meter
WM1x6A
User and Installation manual

User’s Manual
iii
Security Advices and Warnings
Please read this chapter carefully and examine the equipment carefully for potential damages which might
arise during transport and to become familiar with it before continue to install, energize and work with a
single-phase energy meter WM1x6A.
This chapter deals with important information and warnings that should be considered for safe installation
and handling with a device in order to assure its correct use and continuous operation.
Everyone using the product should become familiar with the contents of chapter »Security Advices and
Warnings«.
If equipment is used in a manner not specified by the manufacturer, the protection provided by the
equipment may be impaired.
PLEASE NOTE
This booklet contains instructions for installation and use of single-phase energy meter WM1x6A.
Installation and use of a device also includes handling with dangerous currents and voltages
therefore should be installed, operated, serviced and maintained by qualified personnel only.
ISKRA Company assumes no responsibility in connection with installation and use of the product.
If there is any doubt regarding installation and use of the system in which the device is used for
measuring or supervision, please contact a person who is responsible for installation of such
system.
Before switchingthedevice ON
Check the following before switching on the device:
Nominal voltage.
Terminals integrity.
Protection fuse for voltage inputs (recommended maximal external fuse size is 65 A).
External switch or circuit breaker must be included in the installation for disconnection of the
devices’ power supply. It must be suitably located and properly marked for reliable
disconnection of the device when needed.
Proper connection and voltage level of I/O module.

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User’s Manual
Used symbols on devices’ housing
and labels
SYMBOL
EXPLANATION
DANGER
Indicates proximity of hazardous high voltage, which might result in serious injury
or death if not handled with care.
WARNING
Indicates situations where careful reading of this manual is required and following
requested steps to avoid potential injury is advised.
Compliance of the product with directive 2002/96/EC, as first priority, the
prevention of waste electrical and electronic equipment (WEEE), and in addition,
the reuse, recycling and other forms of recovery of such wastes so as to reduce the
disposal of waste. It also seeks to improve the environmental performance of all
operators involved in the life cycle of electrical and electronic equipment.
Compliance of the product with European CE directives.
Compliance of the product with UK Conformity Assessed (UKCA) directives.
Disposal
It is strongly recommended that electrical and electronic equipment (WEEE) is not deposit as municipal
waste. The manufacturer or provider shall take waste electrical and electronic equipment free of charge.
The complete procedure after lifetime should comply with the Directive 2002/96/EC about restriction
on the use of certain hazardous substances in electrical and electronic equipment.

BASIC DESCRIPTION AND OPERATION
User’s Manual
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Table of contents
1BASIC DESCRIPTION AND OPERATION 1
1.1 DESCRIPTION OF THE DEVICE 2
1.2 SINGLE-PHASE ENERGY METERS APPLICATION 3
1.3 MAIN FEATURES 3
2CONNECTION 4
2.1 MOUNTING 5
2.2 ELECTRICAL CONNECTION 6
3FIRST STEPS 9
3.1 DISPLAY OF DEVICE INFO 10
3.2 LCD USER INTERFACE 11
3.3 LIMITS 18
3.4 FREEZE COUNTERS 22
4SETTINGS 24
4.1 INTRODUCTION 25
4.2 MIQEN SOFTWARE 25
4.3 DEVICES MANAGEMENT 26
4.4 DEVICE SETTINGS 27
4.5 REAL-TIME MEASUREMENTS 29
4.6 DATA ANALYSIS 31
4.7 MY DEVICES 31
4.8 SOFTWARE UPGRADING 31
5MEASUREMENTS 32
5.1 INTRODUCTION 33
5.2 SELECTION OF AVAILABLE QUANTITIES 34
5.3 CALCULATION AND DISPLAY OF MEASUREMENTS 35
6TECHNICAL DATA 37
6.1 ACCURACY 38
6.2 MECHANICAL CHARACTERISTICS OF INPUT 38
6.3 ELECTRICAL CHARACTERISTICS OF INPUT 38
6.4 SAFETY AND AMBIENT CONDITIONS 41
6.5 EU DIRECTIVES CONFORMITY 42
6.6 DIMENSIONS 42
7ABBREVIATION/GLOSSARY 43
8APPENDICES 44
8.1 APPENDIX A: MODBUS COMMUNICATION PROTOCOL 44
8.2 APPENDIX B: M-BUS 57
8.3 APPENDIX C: EQUATIONS 59

BASIC DESCRIPTION AND OPERATION
User’s Manual
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1BASIC DESCRIPTION AND OPERATION
The following chapter presents basic information about a single-phase energy meter WM1x6A required
to understand its purpose, applicability and basic features connected to its operation.
In this chapter you will find:
1.1 DESCRIPTION OF THE DEVICE 2
1.2 SINGLE-PHASE ENERGY METERS APPLICATION 3
1.3 MAIN FEATURES 3

BASIC DESCRIPTION AND OPERATION
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User’s Manual
1.1 Description of the device
The single-phase energy meters WM1-6A, WM1M6A (MID certified) are intended for energy
measurements in single-phase electrical power network and can be used in residential, industrial and
utility applications. Meters measure energy directly in 2-wire networks according to the principle of fast
sampling of voltage and current signals. A built-in microprocessor calculates active/reactive/apparent
power and energy, current, voltage, frequency, power factor, power angle and frequency from the
measured signals. This smart meter can also perform basic harmonic analysis (THDU, THDI). This enables
quick overview of harmonic distortion either coming from a network or generated by the load.
Microprocessor also controls LCD, LED, IR communication and optional extensions.
Connecting terminals can be sealed up against non-authorised access with protection covers. They are
built to be fastened according to EN 60715 standard.
1.1.1 Appearance
Figure 1: Appearance of single-phase electric energy meter WM1x6A
1Current terminals –to load
2Information display
3IR COMM PORT –ON SIDE
4DIN-Rail fitting
5User button and LED indicator
(1000 imp/kWh)
6Current terminal –source
(max 65 A)
7AUX terminals (options):
-RS485
-M-BUS
-TARIFF INPUT
LCD
Number of digits: 8 (7+1)
Height of digits: 4.52 mm
LED
Colour: red
Pulse rate: 1000 imp/kWh
LED on: no load indication

BASIC DESCRIPTION AND OPERATION
User’s Manual
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1.2 Single-phase energy meters application
Energy meters have built-in optical (IR) communication port on the side as a standard. Special WM-USB
adapter (size 1 DIN module) can easily be attached to it. It can be used for direct communication with a
PC to change settings of devices without any communication installed. A built-in pulse output is
designed for sending data to the devices for checking and monitoring consumed energy.
Energy meters could also be connected with iHUB-L1 or Bicom by optical communication (IR).
Optional the meter can be equipped with the following communications:
RS485 serial communication with the MODBUS protocol,
M-BUS serial communication,
Communication modules enables data transmission and thus connection of the measuring places into
the network for the control and management with energy.
Instead of communication modules, there can be also tariff input (option).
Tariff input provides measurement of two tariffs for selected energy registers.
On the housing there are only two terminals, thus only one functional extension is possible (serial
communication, tariff input or M-bus).
1.3 Main features
Single-phase direct connected DIN-rail mounting meters up to maximum current (Imax) 65 A.
Basic current (Ib) 5 A.
MID approval (option for WM1M6A).
Class 1 for active energy according to EN 62053-21 and Baccording to EN 50470-3 .
Class 2 for reactive energy according to EN 62053-23.
Reference frequency 50 Hz and 60 Hz.
Bidirectional energy measurement (import/export).
Reference voltage 230 V ().
Voltage operating range (-20 % ... +15 %).
Pulse output according to EN 62053-31.
Tariff input (option).
RS485 serial communication (option).
M-BUS serial communication (option).
Display LCD 7+1 digit (100 Wh resolution).
Multifunctional front LED.
LED constant 1000 imp/kWh.
Built-in optical (IR) communication port.
Measurement of
opower (active, reactive, apparent),
oenergy (active/reactive/apparent).
oVoltage.
oCurrent.
oFrequency.
oPower factor.
oPower angle.
oActive tariff (option).
oTHD of voltage.
oTHD of current.
2-DIN rail width mounting according to EN 60715.
Sealable terminal cover.

CONNECTION
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User’s Manual
2CONNECTION
This chapter deals with the instructions for single-phase electrical energy meter WM1x6A connection.
Both the use and connection of the device includes handling with dangerous currents and voltages.
Connection shall therefore be performed ONLY by a qualified person using an appropriate equipment.
ISKRA, d.o.o. does not take any responsibility regarding the use and connection. If any doubt occurs
regarding connection and use in the system which device is intended for, please contact a person who
is responsible for such installations.
In this chapter you will find:
2.1 MOUNTING 5
2.2 ELECTRICAL CONNECTION 6