Iskra iMC7 0 Series User Manual
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Iskra iMC7 0 Series User Manual

Power monitoring device; power quality analyzer, network recorder, multifunction meter
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Power Monitoring Device iMC7x0
 Power Quality Analyzer iMC770
 Network Recorder iMC750
 Multifunction Meter iMC740
July 2021 • Version 1.00
User's Manual
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Summary of Contents for Iskra iMC7 0 Series

  • Page 1 Power Monitoring Device iMC7x0  Power Quality Analyzer iMC770  Network Recorder iMC750  Multifunction Meter iMC740 July 2021 • Version 1.00 User’s Manual...
  • Page 2 Basic description and operation Power Monitoring Device iMC7x0 User and Installation manual User’s Manual...
  • Page 3 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.
  • Page 4 Basic description and operation Used symbols on device's 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.

  • Page 5: Table Of Contents

    Basic description and operation Contents BASIC DESCRIPTION AND OPERATION NTRODUCTION ESCRIPTION OF THE DEVICE URPOSE AND USE OF THE DEVICES AIN FEATURES SUPPORTED OPTIONS AND FUNCTIONALITY CONNECTION NTRODUCTION OUNTING LECTRICAL CONNECTION ONNECTION OF INPUT OUTPUT MODULES YNCHRONIZATION FIRST STEPS EYBOARD NAVIGATION NSTALLATION WIZARD ISPLAY OF THE DEVICE INFO SETTINGS...

  • Page 6: Ntroduction

    Basic description and operation EN 50160 MC770) ONFORMITY OF VOLTAGE WITH STANDARD ONLY FOR I EN 50160 MC770) PARAMETERS SETTINGS ONLY FOR I ESET OPERATIONS ETTINGS AND MEMORY CARD MEASUREMENTS NTRODUCTION ELECTION OF AVAILABLE QUANTITIES XPLANATION OF BASIC CONCEPTS RESENT VALUES AX VALUES LARMS ILLING...

  • Page 7: Basic Description And Operation

    Basic description and operation The following chapter presents basic information about iMC7×0 Power Monitoring Device required to understand its purpose, applicability and basic features connected to its operation. Besides that, this chapter contains navigational tips, description of used symbols and other useful information for understandable navigation through this manual.
  • Page 8 Basic description and operation Introduction Regarding the options of a iMC7×0 Power Monitoring Device, different chapters should be considered since it might vary in functionality and design. More detailed description of device functions is given in chapter Main Features, supported options and functionality, page 12.

  • Page 9: Description Of The Device

    Basic description and operation Description of the device iMC7×0 Power Monitoring Device is a comprehensive device intended for permanent monitoring of power quality from its production (especially renewable), transmission, distribution to final consumers, who are most affected by insufficient quality of voltage. It is mostly applicable in medium and low voltage markets. Lack of information about supplied quality of voltage can lead to unexplained production problems and malfunction or even damage to equipment used in production process.

  • Page 10: Purpose And Use Of The Devices

    Basic description and operation Purpose and use of the devices iMC740 Multifunction Meter iMC740 Multifunction Meter is intended for monitoring and measuring electric quantities of three-phase electrical power distribution system. It is provided with 32 programmable alarms, up to four input or output modules and communication. With the RS232/RS485 or Ethernet/USB communication, the device can be set and measurements can be checked.
  • Page 11 Basic description and operation Power Quality indices as defined by EN 50160 table: Phenomena PQ Parameters Frequency variations Frequency distortion Voltage variations Voltage fluctuation Voltage unbalance Voltage changes Rapid voltage changes Flicker Voltage events Voltage dips Voltage interruptions Voltage swells Harmonics &...

  • Page 12: Main Features , Supported Options And Functionality

    Basic description and operation Main features, supported options and functionality iMC7×0 Power Monitoring Device is a perfect tool for monitoring and analysing medium or low voltage systems in power distribution and industrial segments. It can be used as a standalone PQ monitoring device for detection of local PQ deviations. For this purpose it is normally positioned at the point-of-common-coupling (PCC) of small and medium industrial and commercial energy consumers to monitor quality of delivered electric energy or at medium or low voltage feeders to monitor, detect...
  • Page 13 Basic description and operation alarm/watchdog outputs, pulse input/outputs, tariff inputs). o Multilingual support. o Universal or AC power supply. o 96 mm square panel mounting. o Extension unit with four configurable analogue outputs – EX104 (0.4 mA … 20 , 0 V …...
  • Page 14 Basic description and operation General hardware Features Default/Optional Default/Optional Default/Optional iMC740 iMC750 iMC770 General ● Class A measuring accuracy according to EN 61000-4-30 ● ● ● Current auto range up to 12.5 A ● ● ● 4 voltage and 3 current channels with 32 kHz sampling time ●/○...
  • Page 15 Basic description and operation General hardware Features Default / Optional Default / Optional Default / Optional iMC740 iMC750 iMC770 Input and output modules Input/output module 1 ○/○/○/○/○/○/○/○/○ ○/○/○/○/○/○/○/○/○ ○/○/○/○/○/○/○/○/○ 2×AO/2×AI/2×RO/2×PO/2×PI/2×TI/1×BO/2×DI/WO+RO Input/output module 2 ○/○/○/○/○/○/○/○/○ ○/○/○/○/○/○/○/○/○ ○/○/○/○/○/○/○/○/○ 2×AO/2×AI/2×RO/2×PO/2×PI/1×BO/2×DI/WO+RO/ COM2 ● Function is supported (default) ○...
  • Page 16 Basic description and operation General software Features Default / Default / Default/ optional optional optional iMC740 iMC750 iMC770 ● ● ● Setup wizard ● ● ● Wrong connection warning ● ● ● Custom screen settings (3 user defined screens on LCD) ●...

  • Page 17: Connection

    Both the use and connection of the device includes handling with dangerous currents and voltages. Connection shall therefore be performed ONLY a 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.

  • Page 18: Introduction

    Pluggable terminals for connection of inputs, aux. Power supply and I/O modules Short installation manual This document and settings software MiQen can also be found on our web page: https://www.iskra.eu/en/Iskra-Software/ CAUTION Please examine the equipment carefully for potential damages which might arise during transport! User’s Manual...
  • Page 19 Connection Before use Before use please check the following: Nominal voltage (U = 1000VAC; U = 600VAC), P-Pmax P-Nmax Supply voltage, Nominal frequency, Voltage ratio and phase sequence, Current transformer ratio and terminals integrity, Protection fuse for voltage inputs (recommended maximal external fuse size is 6 A) External switch or circuit-breaker must be included in the installation for disconnection of the device’s aux.

  • Page 20: Mounting

    Connection Mounting iMC7×0 Power Monitoring Device is intended only for panel mounting. Pluggable connection terminals allow easier installation and quick replacement should that be required. This device is not intended for usage as portable equipment and should be used only as a fixed panel mounted device.

  • Page 21: Electrical Connection

    Connection PLEASE NOTE Terminals for communication could be chosen (see picture below). Electrical connection Voltage inputs of a device can be connected directly to low-voltage network or via a voltage measuring transformer to a high-voltage network. Measuring current cables shall be attached as through-hole in current transformers or as detachable screw terminals (depends on the HW version of the device).
  • Page 22 Connection iMC7×0 Through-hole connection Terminal connection System/connection assignment assignment 1b (1W1b) Single-phase connection 3b (1W3b) Three-phase, three-wire connection with balanced load 3u (2W3u) Three-phase, three-wire connection with unbalanced load. User’s Manual...
  • Page 23 Connection System/ Through-hole connection Terminal connection connection assignment assignment 4b (1W4b) Three-phase, four wire connection with balanced load 4u (3W4) Three-phase, four wire connection with unbalanced load. PLEASE NOTE Additional GND terminal is added for better stability and accuracy. User’s Manual...

  • Page 24: Connection Of Input/Output Modules

    Connection Connection of input/output modules WARNING Check the module features that are specified on the label, before connecting module contacts. Wrong connection can cause damage or destruction of module and/or device. PLEASE NOTE Examples of connections are given for device with built in two input/output modules and RS232/RS485 communication.
  • Page 25 Connection 2 (terminal numbers 15-20) I/O module 1 and – input options Tariff input module with two tariff inputs for changeover between up to four tariffs. Digital input module with two digital inputs enables reception of impulse signals. Pulse input module enables reception of pulses from various counters (water, gas, heat, flow,etc.).
  • Page 26 Connection Memory Card iMC7×0 Power Monitoring Device is provided with a slot for a full size SD memory card, formatted to FAT16, that supports capacity up to 2 GB. CAUTION When memory slot is not used it should be covered with attached cover to avoid penetration of dust and small objects.
  • Page 27 Connection Communication connection Primary communication interface (COM1) type is normally specified when placing an order. Device can support several types of communication: - serial RS232/RS485 communication designed as a pluggable 5-pole screw terminal connector or DB9 connector, - Ethernet communication designed as standard RJ-45 terminal and USB communication designed as standard USB-B type terminal PLEASE NOTE When connecting serial communication please note that only RS232 or RS485 should be used...
  • Page 28 The driver is provided on the CD, enclosed in the original shipment package, or it can be downloaded from the ISKRA, d.o.o. web page www.iskra.eu. With this driver installed, USB is redirected to a serial port, which should be selected when using MiQen setting software.
  • Page 29 Connection Survey of communication connection table: Connector Terminals Position Data direction Description Not connected From Data transmission (Tx) Data reception (Rx) Not connected RS232 Grounding (  Not connected Do not connect! Do not connect! Not connected Not connected Do not connect! Do not connect! Not connected RS485...
  • Page 30 Connection Survey of secondary communication connection table: Connector Terminals Position Data direction Description Data From transmission (Tx) RS232 Screw terminal Grounding () Data reception (Rx) To/From Screw RS485 Do not connect! terminal To/From Survey of secondary communication connection for Analogue extender EX104 table: Connector Terminals...

  • Page 31: Real Time Synchronization

    Connection Real Time Synchronization Synchronized real-time clock (RTC) is an essential part of any Power Quality Monitoring Device (especially Class A) for proper chronological determination of various events. To distinct cause from consequence, to follow a certain event from its origin to manifestation in other parameters, it is very important that each and every event and recorded measurement on one instrument can be compared with events and measurements on other devices.

  • Page 32: First Steps

    First steps First steps Programming iMC7×0 Power Monitoring Device is very transparent and user friendly. Numerous settings are organized in groups according to their functionality. Programming iMC7×0 Power Monitoring Device can be performed using the keypad and display on the front panel. Due to representation of certain settings not all settings can be programmed this way.

  • Page 33: Keyboard Navigation

    First steps Keyboard navigation The "OK" key is used for confirming the settings, selecting and exiting the display. Direction keys are used for shifting between screens and menus. Navigation keypad and LCD enable basic device settings. During the operation some icons can be displayed in upper part of LCD.
  • Page 34 First steps Installation wizard menu may vary, depending on built in communication modules. In description below is marked which menu appears for specific option. PLEASE NOTE All settings that are performed through the Installation wizard can be subsequently changed by means of the Settings menu or via MiQen by means of communication or a Memory card. When entering installation wizard following display is shown: Installation Welcome to the...
  • Page 35 First steps Set secondary current of current transformer or the value of nominal current if connection is direct. Common energy counter resolution Define Common energy counter resolution as recommended in table below, where Individual counter resolution is at default value 10. Values of primary voltage and current determine proper Common energy counter resolution.

  • Page 36: Display Of The Device Info

    First steps Display of the device info A menu is divided into several submenus with data and information about device: Welcome screen Information Serial number, Hardware and Firmware version, date of calibration and operational time. Memory Internal memory storage availability. Memory information shows available memory since last official data transfer.

  • Page 37: Settings

    Settings Settings A setting structure, which is similar to a file structure in an explorer is displayed in the left part of the MiQen setting window. Available settings of that segment are displayed in the right part by clicking any of the stated parameters. In this chapter you will find detailed description of all iMC7×0 Power Monitoring Devices features and settings.

  • Page 38: Introduction

    (beep). MiQen software MiQen software is a tool for a complete programming and monitoring of ISKRA D.O.O. measuring instruments. Remote operation is possible by means of serial (RS485/RS232), USB or TCP/IP communication in connection with a PC. A user-...
  • Page 39 Depending on type of communication interface connect a device: Directly to a PC using RS232 cable Directly to a PC using RS232/USB or RS485/USB communication adapter To communnication adapter RS485/RS232 (suggested adapter is ISKRA MI485) Directly to a PC using USB cable Network connection using Ethernet cable...
  • Page 40 Settings Set Communication port parameters Under Communication port current communication parameters are displayed. To change those parameters click on button. A Communication port window opens with different communication interfaces. MiQen Communication port window Choose correct communication interface (Modbus, Ethernet or USB) and set correct communication parameters.

  • Page 41: Device Settings

    Settings Start communicating with a device Click on REFRESH button and device's information will be displayed. When devices are connected to a network and a certain device is required it is possible to browse a network for devices. For this purpose choose: scan the network when device is connected to a RS485 bus, browse ethernet devices when device is connected...
  • Page 42 Settings PLEASE NOTE When finished programming, changes should be confirmed by pressing Download settings button in MiQen menu bar ( ) or with a mouse right click menu. PLEASE NOTE When finished programming, all settings can be saved in a setting file (*.msf file). This way it is possible to archive settings in combination with a date.

  • Page 43: Real-Time Measurements

    Settings Real-time measurements Measurements can be seen ONLINE when device is connected to aux. power supply and is communicating with MiQen. When device is not connected it is possible to see OFFLINE measurements simulation. The latter is useful for presentations and visualisation of measurements without presence of actual device.

  • Page 44: Data Analysis

    Settings Different measuring data can be accessed by means of tabs (Measurements, Min/Max …) in the lower part of MiQen window. For further processing of the results of measurements, it is possible to set a recorder button) on active device that will record and save selected measurements to MS Excel .csv file format.

  • Page 45: Software Upgrading

    Settings Window for a choice of memory data to be analysed After data is read or imported recorded quantities can be monitored in a tabular or a graphical form. The events that triggered alarms can be analyzed or a report on supply voltage quality can be made.

  • Page 46: General Settings

    Settings General settings Main menu Settings Measurements General Settings Date & Time  Resets Connection SD card Communication Info Installation Security 12.04.2021 16:53:36 Energy Inputs/Outputs  Main menu General settings are essential for iMC7×0 Power Monitoring Device. They are divided into four additional sublevels (Connection, Communication, Display and Security).
  • Page 47 Settings Language Set language for display. When language is changed from or to Russian, characters of the password are changed too. For overview of character translation see chapter Password and language. Main menu  Settings  General  Language Currency Choose currency for evaluating energy cost (see chapter Energy).
  • Page 48 Settings Time synchronisation source Synchronized real-time clock (RTC) is an essential part of any analyzer for proper chronological determination of various events. To distinct cause from consequence, to follow a certain event from its origin to manifestation in other parameters it is very important that each and every event and recorded measurement on one device can be compared with events and measurements on other devices.
  • Page 49 Settings Time zone Set time cone in which device is mounted. Time zone influences internal time and time stamps. When UTC time is required, time zone 0 (GMT) should be chosen. Automatic S/W time If Yes is chosen, time will be automatically shifted to a winter or a summer time, regarding the time that is momentarily set.
  • Page 50 Settings Fixed window A fixed window is a mode that calculates average value over a fixed time period. Time constant can be set from 1 to 255 min. »Time into period« as displayed in MiQen actively shows the remaining time until the end of the period in which current MD and maximal MD from the last reset are calculated.
  • Page 51 Settings Sliding windows A mode of sliding windows enables multiple calculations of average in a period and thus more frequent refreshing of measuring results. Average value over a complete period is displayed. A running MD is updated every sub-period for average of previous sub-periods.
  • Page 52 Settings Max demand reset mode This setting defines a mode of resetting Max demand values. It can be set to: Manual User resets max demand value with keypad or setting software (see chapter Reset) Automatic Daily every day at 00:00, Weekly on Monday at 00:00, Monthly the first day in a month at 00:00, Yearly...
  • Page 53 Settings Starting voltage for SYNC (V) Device needs to synchronize its sampling with measuring signals period to accurately determine its frequency. For that purpose, input signal has to large enough to be distinguished from a noise. If all phase voltages are smaller than this (noise limit) setting, instrument uses current inputs for synchronization.
  • Page 54 Settings Displacement method: With this method, reactive power (energy) is calculated by multiplication of voltage samples and by 90° displaced current samples (see chapter Equations): Q = U × I|+90° With this method, reactive power (energy) represents only true reactive component of apparent power (energy).

  • Page 55: Connection

    Settings Connection Main menu Settings Measurements General Settings Date & Time  Resets Connection SD card Communication Info Installation Security 12.04.2021 16:53:36 Energy Inputs/Outputs  Main menu CAUTION Settings of connections shall reflect actual state otherwise measurements could not be valid. Connection mode When connection is selected, load connection and the supported measurements are defined (see chapter Selection of available quantities).
  • Page 56 Settings Used voltage and current range Setting of used voltage and current range is connected with all settings of alarms, analogue outputs and measurements recording. CAUTION In case of subsequent change of those ranges shall be alarm and analogue output settings correspondingly changed as well.
  • Page 57 Settings Voltage channel mapping For each voltage Measuring channel Ux, is possible to select connection terminal. Default value represents channel dedicated to this parameter as shown on the label. Default voltage channel mapping table: Measuring channel Default value Measuring channel U1 Terminal 2 Measuring channel U2 Terminal 5...

  • Page 58: Serial Communication

    Settings Serial communication Main menu Settings Measurements General Settings Date & Time  Resets Connection SD card Communication Info Installation Security 12.04.2021 16:53:36 Energy Inputs/Outputs  Main menu Serial Communication Communication parameters (only for main communication port COM1), which are important for the operation in RS485 network or connections with PC via RS232 communication.
  • Page 59 Settings Push Data Format When PUSH or MQTT (M2M, machine-to-machine) communication modes are used, data can be sent (pushed/published) to two different servers or MQTT brokers. Within this setting menu, all parameters relevant to used servers or MQTT brokers should be set, as well as the data type for sent data, time synchronization source, and server response time.

  • Page 60: Usb Communication

    Settings USB communication USB Communication There is no special setting for USB communication. For more detailed information how to handle device with USB communication use Help section in MiQen software. PLEASE NOTE Device supports only a single communication input (USB or Ethernet) at a time when using primary communication port COM1.

  • Page 61: Ethernet Communication

    Settings Ethernet communication Main menu  Settings  Communication  (all settings are not supported on keypad) Device Address Device Modbus address is important when user is trying to connect to device via MiQen software. Usable range of addresses is from 1 to 247. Default address number is 33.
  • Page 62 Settings When port 502 is used a remote application(s) can access device regardless the setting for Local Port in a device. This setting is applicable only when terminal access is required. Reserved TCP Port numbers table: Important port numbers Function 1 –...
  • Page 63 Settings Port 502 Is standardized port to communicate with the device via MODBUS/TCP communication protocol and is fixed. Communication via this port allows multiple connections to the device. Communication over this port does not block any other traffic. Port 33333 This UDP port is reserved for Discovery Service, a service run by MiQen software, to discover devices connected in to local Ethernet communication network.
  • Page 64 Settings PUSH communication settings When PUSH communication mode is used, data can be sent (pushed) to two different servers. Within this setting, all parameters relevant to used servers should be set, as well as data type for sent data, time synchronization source and server response time.

  • Page 65: Display

    Settings Display Main menu Settings Measurements General Settings Date & Time  Resets Connection SD card Communication Info Installation Security 12.04.2021 16:53:36 Energy Inputs/Outputs  Main menu Display settings A combination of setting of the contrast and back light defines visibility and legibility of a display.
  • Page 66 Settings Example: Desired result: Customized Customized Customized Combined customized screen 1 screen 2 screen 3 screen 4  1-3_TRMS P-P_avg P-P_avg THD-I1 UNBALANCE UNBALANCE PLEASE NOTE Customized screens defined here are selected in menu Main menu  Measurements  Present values  Custom Setting can be made only for 3 customized screens.

  • Page 67: Security

    (depending on a serial number of the device). The BP password is available in the user support department in ISKRA d.o.o., and is entered instead of the password PL1 or/and PL2. Do not forget to state the device serial number when contacting the personnel in ISKRA d.o.o.
  • Page 68 Settings The access to the device serial number via a keyboard Example: Main menu  Info  Password setting A password consists of four letters taken from the British alphabet from A to Z. When setting a password, only the letter being set is visible while others are hidden. A password of the first (PL1) and the second (PL2) level is entered, and time of automatic activation is set.

  • Page 69: Energy

    Settings Energy Main menu Settings Measurements General Settings Date & Time  Resets Connection SD card Communication Info Installation Security 12.04.2021 16:53:36 Energy Inputs/Outputs  Main menu WARNING Before modification, all energy counters should be read or if energy values are stored in recorders, recorder should be read with MiQen software or stored on Memory card to assure data consistency for the past.
  • Page 70 Settings Suggested Common energy counter resolutions table: Current 50 A 100 A 1000 A Voltage 110 V 100 mWh 1 Wh 10 Wh 10 Wh 100 Wh 230 V 1 Wh 1 Wh 10 Wh 100 Wh 1 kWh 1000 V 1 Wh 10 Wh 100 Wh...
  • Page 71 Settings Common energy cost exponent Setting enables resolving the cost display. On the basis of this and a counter divider constant, a basic calculation prefix for energy cost is defined. Common Tariff Price Exponent and energy price in tariffs Exponent and price represent energy price (active, reactive, common) in a tariff. The tariff price exponent is used for recording the price without decimal places.
  • Page 72 Settings Tariff clock Basic characteristics of a tariff clock: 4 tariffs (T1 to T4) Separate settings for 4 seasons a year Up to 4 time divisions per season in each Day program for tariff switching Any combination of valid days in a week or holidays for each program Combining of day groups Up to 20 settable dates for holidays Operation of internal tariff clock...
  • Page 73 Settings Example of season settings table: Season Season start day Season 1: 15.02 Season 2: 30.10 Season 3: − Season 4: 01.06 Date Active season 01.01. − 14.02. 2 (last in the year) 15.02. − 31.05. 01.06. − 29.10. 30.10. − 31.12. Days in a week and selected dates for holidays define time divisions for each daily group in a period for tariff switching.
  • Page 74 Settings Counter measured quantity For each of eight (8) counters different measured quantities can be selected. User can select from a range of predefined options referring to measured total energy or energy on single phase. Or can even select its own option by selecting appropriate quantity, quadrant, absolute or inverse function.

  • Page 75: I/O Modules

    Settings I/O Modules Main menu Settings Measurements General Settings Date & Time  Resets Connection SD card Communication Info Installation Security 12.04.2021 16:53:36 Energy Inputs/Outputs  Main menu I/O functionality is a powerful tool of iMC7×0 Power Monitoring Device. Using various I/O modules device can be used not only for monitoring main electrical quantities but also for monitoring process quantities (temperature, pressure, wind speed …) and for various control purposes.
  • Page 76 Settings An alarm output and a pulse output can also be selected with the keypad and display. When selecting settings of energy and quadrants for a certain counter, only preset selection is possible, while more demanding settings are accessible via communication.
  • Page 77 Settings Digital input module Module has no settings. General purpose is to collect digital signals from various devices, such as intrusion detection relay, different digital signals in transformer station, industry ... It is available in three different hardware versions. It can also be included in alarm function (see chapter Alarms). Tariff input module Module has no setting.
  • Page 78 Settings MiQen window for output signal definition For more information, see Help section in MiQen software. Pulse output module Pulse output is a solid state, opto-coupler open collector switch. Its main purpose is pulse output for selected energy counter, but can also be used as an alarm or general purpose digital output.
  • Page 79 Settings Status (Watchdog) and Relay output module Watchdog and relay module is a combination of two functionalities. One output is used for Watchdog functionality, the other acts as a Relay output module. The purpose of a Watchdog relay is to detect potential malfunction of device or auxiliary power supply failure.
  • Page 80 Settings Pulse Output of Energy counter A corresponding Energy counter (up to 8) can be defined to a digital output. A number of pulses per energy unit, pulse length, and a tariff set in which output is active are set. PLEASE NOTE Pulse parameters are defined by EN 62053−31 standard.
  • Page 81 Settings Alarm Output If Digital output is defined as an Alarm output, its activity (trigger) is connected to Alarm groups. Multiple alarm groups can be attached to it and different signal shapes can be defined. For more information on how to define alarm groups, see chapter Alarms.
  • Page 82 Settings General purpose digital output This functionality allows user to enable / disable digital output by software settings for example from SCADA system. For this operation MODBUS registers need to be accessed by means of software. By modifying appropriate MODBUS registers (from SCADA) digital output can be set or reset.
  • Page 83 Settings Communication modules There are two different communication modules that can be used as an independent secondary communication connection. communication module (RS232 or RS485) Communication module for Analogue extender EX104 Communication module for Analogue extender EX104 Module is preset for connection of up to 4 Analogue extender EX104 devices. It uses RS485 communication with fixed parameters to communicate with connected modules.

  • Page 84: Alarms

    Settings Alarms Alarms are used for alarming exceeded set values of measured quantities and quantities from different input modules. Alarms can also trigger different actions according to their settings: Visual (alarms cause special alarm LED to lit) Sound (alarms can cause sound signalisation) Relay switch (alarms can switch digital outputs on main and aux.
  • Page 85 Settings Alarm statistics reset This setting is only for resetting online alarms statistics displayed in MiQen software. Alarms statistics for showing graphical representation of frequency of alarms occurence Alarms group settings iMC7×0 Power Monitoring Device supports recording and storing of 32 alarms that are divided into 4 groups of 8 alarms.
  • Page 86 Settings Compare time delay This setting defines delay time (if required) between satisfying the alarm condition and alarm activation. If alarm condition is shorter then this setting alarm will not be triggered. This setting is used to rule out sporadic and very short duration triggers. Hysteresis This setting defines alarm deactivation hysteresis.
  • Page 87 Settings Parameter This setting defines a quantity that should be monitored. It is also possible to select process quantities from I/O modules. Value For chosen monitoring parameter an actual value or MD value should be set. Condition It is a combination of a logical operator “Higher than” or “Lower than” and a limit value of the condition.
  • Page 88 Settings Graphical presentation of alarms operation User’s Manual...

  • Page 89: Internal Memory

    Settings Internal memory Measurements, alarms, PQ reports (only for iMC770) and details can be stored in a built in memory of iMC7×0 Power Monitoring Device 8 MB flash. This amount of memory suffices for storing EN 50160 compliant PQ reports with details for more than 12 month.
  • Page 90 Settings Memory operation Memory functions in a cyclic mode in compliance with the FIFO method. This means that only the latest records are stored in the memory that will replace the oldest ones. A size of stored data or a storing period depends on selected partition size, a number of recorded quantities and a storage interval.
  • Page 91 Settings General purpose recorder settings General purpose recorder consists from 4 partitions (A, B, C and D). General purpose recorder does not include alarm recorder or PQ reports and details recorder. Separately, for each of four partitions, following settings can be set: Storage interval Storage interval sets a time interval for readings to be recorded.
  • Page 92 Settings Recorded quantities For each measurement, which is to be recorded it is possible to set a required quantity and its type within storage interval. Stored parameter settings Parameter Here monitoring quantity can be selected from a list of supported measurements. Besides primary electrical quantities also auxiliary quantities from input modules can be selected.
  • Page 93 Settings Average value represents calculated average value within selected storage interval. Actual value represents first momentary value within selected storage interval. Note that momentary value is not a single period value but an average (0.1 s to 5 s; see chapter General settings / Average interval). Minimum and Maximum (Period) values represent min.
  • Page 94 Settings Conformity of voltage with EN 50160 standard (only for iMC770) The EN 50160 standard deals with voltage characteristics of electricity supplied by public distribution systems. It specifies the limits or values of voltage characteristics in normal operation within public low or middle voltage system network. Following this definition the iMC770 Power Quality Analyzer is adapted for monitoring voltage characteristics of a distribution systems according to EN 50160 standard.
  • Page 95 Settings General PQ settings (only for iMC770) General PQ settings are basic parameters that influence other settings. Monitoring mode Monitoring mode can be set to:  EN50160: Monitoring according to EN 50160 enabled. Weekly reports are issued according to set parameters ...
  • Page 96 Settings Flicker calculation function Low voltage level for residential lamps can be either 230 V or 110 V. Function for detection of flicker differs regarding this voltage. Since actual low voltage level can be different as secondary voltage of used VT (nominal measuring voltage) this setting must be set to a voltage level, which is used to supply residential lamps.
  • Page 97 Settings PLEASE NOTE Regardless of this setting, readings will be always stored in recorder and available for analysis. Flagging only influences PQ reports as a whole. Flagged data can be included or excluded from a PQ report Sending Reports and Report Details When PUSH communication mode is active, reports about quality and report details for each parameter can be sent (pushed) to a predefined location inside local or wide area network.
  • Page 98 Settings EN 50160 parameters settings (only for iMC770) Power Quality indices as defined by EN 50160: Phenomena PQ Parameters Frequency variations Frequency distortion Voltage variations Voltage fluctuation Voltage unbalance Voltage changes Rapid voltage changes Flicker Voltage events Voltage dips Voltage interruptions Voltage swells Harmonics &...
  • Page 99 Settings Settings for power quality parameters are set with setting and monitoring software MiQen MiQen HELP description clearly marks PQ parameters, which are not required as a part of EN 50160 PQ report. Below figure shows settings for interharmonic values: Settings for 10 user defined interharmonic frequencies User’s Manual...
  • Page 100 Settings Reset operations During normal operation of a device different counter s values need to be reset from time to time. Reset energy counters (E1, E2, E3, E4) All or individual energy meters (counters) are reset. Main menu  Resets  Energy counters  All Energy counters / Energy counter E1/E2/E3/E4 Reset energy counters costs (E1, E2, E3, E4) All or individual energy costs are reset.
  • Page 101 Settings Synchronize MD Thermal mode In this mode, synchronization does not have any influence. Fixed interval/Sliding windows Synchronization sets time in a period or a sub-period for sliding windows to 0 (zero). If the interval is set to 2, 3, 4, 5, 6, 10, 12, 15, 20, 30 or 60 minutes, time in a period is set to such value that some intervals will be terminated at completed hour.
  • Page 102 Settings Settings and memory card iMC7×0 Power Monitoring Device is provided with a built in slot for a full size SD memory card that is used for measurements transfer from internal memory, device setting and software upgrading. The memory card shall be formatted with the FAT16 file system.
  • Page 103 Settings UPGRADE A file with upgrades is available for upload with the MiQen software. A file has a name of a corresponding device type designation and suffix FL2 (e.g. IMC7×0.FL2). AUTOMENU.TXT For faster and easier upgrading of the firmware there is »AUTOMENU.TXT« file in the root directory.
  • Page 104 Settings Handling memory card iMC7×0 Power Monitoring Device is on the front panel equipped with a slot for a Memory card. Slot is protected with a protection cover that can be simply removed before inserting the card. The protection cover shall be fixed back after work is done. CAUTION While memory card activity LED is blinking it should not be pulled out of the slot.
  • Page 105 Settings Save settings File of current device settings is stored in SETTING directory. File name consists of device serial number and MSF extension. In case of file already stored on memory card, the device warns if file should be overwritten. Load settings For loading settings, the files that correspond to the device type are displayed on LCD.
  • Page 106 Settings Firmware upgrading Before upgrading files on memory card are checked first, this can last some time (approx. 1 minute). When both versions are displayed, upgrade can be performed if the device software version is lower or equal to the version in a file. WARNING When upgrading firmware software remove memory card and do not interrupt power supply - the device could become inoperative!
  • Page 107 Measurements Measurements iMC7×0 Power Monitoring Device performs measurements with a constant sampling frequency 31 kHz. Measurement methods differ for normal operation quantities, where values are averaged and aggregated according to aggregation requirements of IEC 61000-4-30 standard (Class A) and voltage events where half-period values are evaluated again according to Class A standard.
  • Page 108 Measurements Introduction Online measurements Online measurements are available on display or can be monitored with setting and monitoring software MiQen. Readings on display are performed continuously with refresh time dependent on set average interval whereas rate of readings monitored with MiQen is fixed and refreshed approx.
  • Page 109 Measurements Online measurements in graphical form – phase diagram and daily total active power consumption histogram Online measurements in tabelaric form User’s Manual...
  • Page 110 Measurements Monthly energy consumption profile The monthly energy consumption profile measures a daily average of the active power for the last 32 days. PLEASE NOTE The measured values of the current day are stored even if the meter is switched off or not powered.
  • Page 111 Measurements Example of review Row display values: The active power (W) the filtered active power (W) with thermal function PtD, the energy of the current day (kWh), the energy of the previous day (kWh), the energy of the first, second, third, and fourth 7-days period (kWh), the energy value of the last 31 days (current day not included, kWh).
  • Page 112 Measurements Monthly energy consumption profile – MiQen software Monthly consumption profile of total active energy and active energy of all three phases are represented in the Energy Profile tab. User’s Manual...
  • Page 113 Measurements Yearly energy consumption profile The yearly energy consumption profile measures a monthly average of the active power for the last 24 months. PLEASE NOTE The measure values of the current month are stored even if the meter is switched off or not powered.
  • Page 114 Measurements Example of review Row display values: The active power (W) the filtered active power (W) with thermal function PtD, the energy of the current day (kWh), the energy of the previous day (kWh), the energy of the current month (kWh), the energy of the previous month (kWh), the energy of the current year (kWh), the energy of the previous year (kWh),...
  • Page 115 Measurements Yearly energy consumption profile – MiQen software Yearly consumption profile of total active energy and active energy of all three phases are represented in the Energy Profile tab. Interactive instrument Additional communication feature of a device allows interactive handling with a dislocated device as if it would be operational in front of user.
  • Page 116 Measurements Selection of available quantities Available online measuring quantities and their appearance can vary according to set type of power network and other settings such as; average interval, max. demand mode, reactive power calculation method … Complete selection of available online measuring quantities is shown in a table on the next page.
  • Page 117 Measurements Selection of available measurement quantities: Meas. type Measurement 3-phase 3-phase 1-phase comments 4-wire 3-wire Phase Voltage  1ph measurements 1-3_TRMS   AVG_TRMS   unbalance_neg (only for iMC770)   unbalance_zero  1ph DC component of phase voltages 1-3_DC Current ...
  • Page 118 Measurements Meas. type Measurement 3-phase 3-phase comments 4-wire 3-wire phase Phase Flickers (only for iMC770) measurements instantaneous flicker sensation measured  1ph with 150 samples / sec (original sampling is 1200 smpl/sec) 10 min statistical evaluation (128 classes of  1ph CPF) derived from 12 Pst acc.
  • Page 119 Measurements Meas. type Measurement 3-phase 3-phase 1-phase comments 4-wire 3-wire Maximum demand Maximum   1ph demand MD_I measurements    MD_P import    MD_P export    MD_Q    MD_Q    MD_S Min and max Min and max...
  • Page 120 Measurements Explanation of basic concepts Sample frequency A device measures all primary quantities with a constant sampling rate of 31 kHz (625 s/per at 50 Hz). Average interval Operation of iMC7×0 Power Monitoring Device depends on several Average intervals, which should all be well understood and set to a proper value. Average interval for measurements and display Due to readability of measurements from LCD and communication, an Average interval can be selected from a range of predefined values (from 0.1s to 5 s).
  • Page 121 Measurements Power and energy flow Figures below show a flow of active power, reactive power and energy for 4u connection. Display of energy flow direction can be adjusted to connection and operation requirements by changing the Energy flow direction settings. Explanation of energy flow direction User’s Manual...
  • Page 122 Measurements Calculation and display of measurements This chapter deals with capture, calculation and display of all supported quantities of measurement. Only the most important equations are described; however, all of them are shown in a chapter Equations with additional descriptions and explanations.
  • Page 123 Measurements Present values Main menu Measurements Measurements Present values Settings Min/Max values  Resets Alarms SD card Graphs time Info Graphs FFT Installation Power supply quality 12.04.2021 16:53:36 Demo cycling  Main menu PLEASE NOTE Display of present values depends on connection mode. Therefore display organisation slightly differs from one connection mode to another.
  • Page 124 Measurements Current Device measures: Real effective (rms) value of phase currents and neutral measured current (Inm), connected to current inputs Neutral calculated current (Inc), Neutral error current (Ie = |Inm – Inc|), Phase angle between Neutral voltage and Neutral Current (In), Average current (Ia) and a sum of all phase currents (It) Crest factor of phase currents (CRI1-3) ∑...
  • Page 125 Measurements Power factor and power angle Power angle (or displacement Power Factor) is calculated as quotient of active and apparent power for each phase separately (cos , cos , cos ) and total power angle (cos ). It represents angle between first (base) voltage harmonic and first (base) current harmonic for each individual phase.
  • Page 126 Measurements Frequency Network frequency is calculated from time periods of measured voltage. Device uses synchronisation method, which is highly immune to harmonic disturbances. Device always synchronises to a phase voltage U1. If signal on that phase is too low it (re)synchronises to next phase. If all phase voltages are low (e.g. short circuit) device synchronises to phase currents.
  • Page 127 Measurements Harmonic distortion Device calculates different harmonic distortion parameters: THD is calculated for phase currents, phase voltages and phase−to−phase voltages and is expressed as percent of high harmonic components regarding to fundamental harmonic TDD is calculated for phase currents K-factor is calculated for phase currents Device uses measuring technique of real effective (rms) value that assures exact measurements with the presence of high harmonics up to 63rd harmonic (see chapter Harmonics analysis).
  • Page 128 Measurements Customized screens Here 4 different customised screens are shown. First three screens show 3 different user defined values. Fourth screen displays 5 different values as a combination of 3 values of first screen and first 2 values of second screen. Main menu ...
  • Page 129 Measurements Screen 3: Dynamic MD values Maximal MD values MD active power P (positive) MD active power P (positive) P− MD active power P (negative) W φ MD active power P (negative) W MD reactive power Q−L var φ MD reactive power Q−L MD reactive power Q−C var φ...
  • Page 130 Measurements Min/Max values Main menu Measurements Measurements Present values Settings Min/Max values  Resets Alarms SD card Graphs time Info Graphs FFT Installation Power supply quality 12.04.2021 16:53:36 Demo cycling  Main menu All Min/Max values are displayed similar as Present values. Average interval for min.
  • Page 131 Measurements Tabelaric presentation of min. max. Values Graphical presentation of min. max. values In graphical presentation of min. and max. values relative values are depicted. Base value for relative representation is defined in general settings/Connection mode/used voltage, current range. For phase voltages and for phase-to-phase voltages the same value is used. User’s Manual...
  • Page 132 Measurements Alarms Main menu Measurements Measurements Present values Settings Min/Max values  Resets Alarms SD card Graphs time Info Graphs FFT Installation Power supply quality 12.04.2021 16:53:36 Demo cycling  Main menu Alarms are important feature for notifying exceeded user predefined values. Not only for visualisation and recording certain events with exact time stamp.
  • Page 133 Measurements Survey of alarms In a detailed survey alarms are collected in groups. A number of a group and alarm is stated in the first column, a measurement designation in the second, and a condition for alarm in the third one. Active alarm is marked. Main menu ...
  • Page 134 Measurements Billing Energy billing is an additional function for notifying the calculation of the difference of the energy in the previous month or this month. The value of the energy at the beginning of the previous month, the actual month, and the current value of energy can be observed. The values displayed start to be measured at the beginning of the month.
  • Page 135 Measurements Display of billing values on iMC7x0 To enter the Captured energy sub-menu press the OK button. To observe different energy values (actual month, previous month, actual period, and previous period) use up/down buttons. Moving between different values of selected month/period use left/right buttons. Press an OK button twice to return to the previous menu.
  • Page 136 Measurements Display of billing – MiQen software In a detailed survey, energy values are collected in columns. The difference of energy is stated in the first and second columns (Difference B-A, Difference C-B). A measurement designation in the third, fourth and fifth columns (Capture A, Capture B, and Capture C).
  • Page 137 Measurements Harmonic analysis Main menu Measurements Measurements Present values Settings Min/Max values  Resets Alarms SD card Graphs time Info Graphs FFT Installation Power supply quality 12.04.2021 16:53:36 Demo cycling  Main menu Harmonic analysis is an important part of PQ monitoring. Frequency converters, inverters, electronic motor drives, LED, halogen and other modern lamps.
  • Page 138 Measurements PLEASE NOTE Interharmonics are available only on communication. All of the listed harmonic parameters can be monitored online, stored in internal memory (not all at a time) and compared against alarm condition threshold limit. The latter is in combination with alarm relay output suitable for notification and/or automatic disconnection of compensation devices, when too much harmonics could threaten capacitors.
  • Page 139 Measurements More information about harmonic parameters, especially individual harmonic values, can be obtained when device is connected to communication and monitoring and setting software MiQen is used. Tabelaric presentation of phase voltage harmonic components Graphical presentation of phase voltage harmonic components User’s Manual...
  • Page 140 Measurements PLEASE NOTE According to standard IEC 61000-4-7 that defines methods for calculation of harmonic parameters, harmonic values and interharmonic values do not represent signal magnitude at exact harmonic frequency but weighted sum of cantered (harmonic) values and its sidebands. More information can be found in mentioned standard.
  • Page 141 Measurements PQ Analysis (only for iMC770) Main menu Measurements Measurements Present values Settings Min/Max values  Resets Alarms SD card Graphs time Info Graphs FFT Installation Power supply quality 12.04.2021 16:53:36 Demo cycling  Main menu PQ analysis is a core functionality of iMC770 Power Quality Analyzer. PQ (Power Quality) is a very common and well understood expression.
  • Page 142 Measurements For evaluation of voltage quality, device can store main characteristics in the internal memory. The reports are made on the basis of stored data. Data of the last 300 weeks and up to 170,000 variations of the measured quantities from the standard values are stored in the report, which enables detection of anomalies in the network.
  • Page 143 Measurements Online monitoring PQ parameters and over viewing reports is easier with MiQen. Tabelaric presentation of PQ parameters and overall compliance status for actual and previous monitoring period. For all parameters basic information is shown: Actual quality Actual quality is for some parameters expressed as a percentage of time, when parameters were inside limit lines and for others (events) is expressed as a number of events within monitored period.
  • Page 144 Measurements Required quality Required quality is limit for compliance with standard EN 50160 and is directly compared with actual quality. Result of comparison is actual status of compliance. More information about required quality limits can be found in standard EN 50160. PLEASE NOTE To make the complete quality report the aux.
  • Page 145 Measurements PQ records (only for iMC770) Even more detailed description about PQ can be obtained by accessing PQ reports with details about anomalies in internal memory. Structure and operation of internal memory and instructions on how to access data in internal memory is described in chapters Devices management and Internal memory).
  • Page 146 Measurements Main window is divided into two parts. Upper part holds information about recorded periodic PQ reports and lower part holds detailed information about each of upper reports. For each of monitored parameters it is possible to display anomaly report. This represents a complete list of accurately time stamped measurements that were outside PQ limit lines.
  • Page 147 Measurements In evaluation of PQ parameter details it is possible to show  all events,  non-flagged events. Multiphase events According to standard EN 50160 events (interruptions, dips, swells) should be multiphase aggregated. Multiphase aggregation is a method where events, which occur in all phases at a same time, are substituted with a single multiphase event since they were most likely triggered by a single anomaly in a network.
  • Page 148 Measurements Definition for multiphase dip and swell is: “Multiphase event starts when voltage on one or more phases crosses threshold line for event detection and ends when voltage on all phases is restored to normal value” Definition for multiphase interruption is: “Multiphase interruption starts when voltage on all three phases crosses threshold line for interruption detection and ends when voltage on at least one phase is restored to normal value”...
  • Page 149 Measurements Voltage event details are displayed in two ways. First as a list of all events with all details and second in a table according to UNIPEDE DISDIP specifications. Presentation of Dips and Interruptions in a list (only four events) and in a statistics table Remote display features The remote display is very useful for a quick overview of all measured parameters on the other devices connected via RS485 communication.
  • Page 150 Measurements The measurements of the remote device are refreshed twice per second. The keyboard navigation of measurements and settings are transferred to the remote device, so it is possible to work with the remote device as from its own keyboard. The exception are keys OK and left.
  • Page 151 Communication modes Communication modes iMC7×0 Power Monitoring Device supports two communication modes to suit all demands about connectivity and flexibility. Standard POLL communication mode is used for most user interaction purposes in combination with monitoring and setting software MiQen, SCADA systems and other MODBUS oriented data acquisition software.
  • Page 152 Communication modes POLL communication mode This is most commonly used communication mode. It services data-on-demand and is therefore suitable for direct connection of setting and / or supervising software to a single device or for a network connection of multiple devices, which requires setting up an appropriate communication infrastructure.
  • Page 153 Communication modes CAUTIONN Time synchronization with push system has the lowest priority. If any of other time synchronization sources is available (GPS, NTP, IRIG-B) they have priority to synchronize RTC. By using time synchronization with push functionality device does not meet requirements for Class A Measuring device and can be used only as a Class S measuring device.
  • Page 154 Communication modes MQTT communication mode (valid only for iMC750, iMC770) MQTT is a widely accepted transport protocol used in many IoT solutions. It provides a standard way to send measuring data and alarms from the instrument to the MQTT broker. MQTT client in iMC7xx is intended to publish the same payload as push protocol.
  • Page 155 Communication modes IP Port: TCP port of MQTT broker (usually 1883). MQTT QoS: MQTT Quality of service. QoS level description: QoS0: the message is sent at most once QoS1: the message is sent at least once QoS2: the message is sent exactly once Since the instrument is handling messages queue, recommended setting is QoS1.
  • Page 156 Communication modes WEB Interface A built-in WEB interface is intended to view settings and teal-time measurements without additional SW such as MiQen. Settings Page Web management settings page User’s Manual...
  • Page 157 Communication modes Measurements Page Web management measurements page Energy Counters Page Web management energy counters page User’s Manual...
  • Page 158 Communication modes Energy Profile Web management energy counters page User’s Manual...
  • Page 159 Communication modes Monthly energy consumption profile Web management monthly energy consumption profile page User’s Manual...
  • Page 160 Communication modes Daily energy consumption profile Web management daily energy consumption profile page User’s Manual...
  • Page 161 Communication modes 24 Hour Load Profile User’s Manual...
  • Page 162 Technical data Technical data In following chapter all technical data regarding operation of iMC7×0 Power Monitoring Device is presented. ACCURACY INPUTS CONNECTION COMMUNICATION I/O MODULES SAFETY OPERATING CONDITIONS DIMENSIONS ABBREVIATIONS User’s Manual...
  • Page 163 Technical data Accuracy Measured values Measuring Range Standard Accuracy class (Direct connection) iMC770 iMC740 & iMC750 1.8 kW – 18 kW (In = 5 A) IEC61557-12 Active power 0 kW– 1.8 kW (In = 1 A) IEC61557-12 Reactive power 0 kvar– 18 kvar IEC61557-12 Apparent power 0 kVA–...
  • Page 164 Technical data Measured values Measuring Range Standard Accuracy class (Direct connection) iMC770 iMC740 & iMC750 Power factor (PF −1(C)…0…+1(L) IEC61557-12 Voltage swells IEC61557-12 0.2, ±1 cyc 100 % – 120 % U IEC61000-4-30 Class A Volatge dips IEC61557-12 0.2, ±1 cyc 5 % –...
  • Page 165 Technical data Inputs Voltage input Number of channels Sampling rate 32 kHz Min. voltage for sync. trms Nominal value (U 500 V , 866 V Max. measured value (cont.) 600 V ; 1000 V Max. allowed value 1.2 × U permanently 2 ×...
  • Page 166 Technical data Connection Permitted conductor cross-sections Terminals Max. conductor cross-sections 2.5 mm with pin terminal Voltage inputs (4) 4 mm solid wire Current inputs (3) one conductor with  Ø 6 mm insulation 2.5 mm with pin terminal Supply (3) 4 mm solid wire 2.5 mm...
  • Page 167 Technical data Communication Ethernet RS232 RS485 Type of connection Network Direct Network Max. connection 30 m 1000 m length Screw terminals or Terminals RJ−45 USB - B DB9 connector Insulation In accordance with EN 61010−1:2010 standard Transfer mode Asynchronous MODBUS TCP / Protocol MODBUS RTU / DNP3 auto detect DNP3 auto detect...
  • Page 168 Technical data I/O modules Main module (1, 2) Digital input Purpose Tariff input, Pulse input, General module purpose digital input Tariff input No. of inputs per module Rated voltage 5 V... 48 V AC/DC * 110 ±20 % V AC/DC * 230 ±20 % V AC/DC * * Depends on a built in hardware Frequency range...
  • Page 169 Technical data Type Optocoupler open collector switch No. of outputs per module Purpose Pulse output Rated voltage 40 V AC/DC Max. switching current 30 mA (R = 8 Ω) ONmax Pulse length programmable (2 ms… 999 ms) Status Type Relay switch Number of outputs 1 x watchdog + 1 x relay output (Watchdog)
  • Page 170 Technical data Analogue input module DC current Nominal input range 1 –20 mA… 0 … 20 mA (±20 %) input resistance 20 Ω input accuracy 0.5 % of range temperature drift 0.01% / °C conversion resolution 16 bit (sigma-delta) internally referenced Analogue input mode Single-ended...
  • Page 171 Technical data Safety Safety protection class II In compliance with EN 61010−1 600 V, installation category II 300 V, installation category III Pollution degree 2 Uaux against SELV circuits - 3.51 kV AC Test voltage Other circuits to functional earth – 2.21 kV AC Directive on electromagnetic compatibility 2004/108/EC In compliance with EN 61326-1 for industrial environment In compliance with EN 60529: 1997/A1...
  • Page 172 Technical data Operating conditions Operating conditions which have been tested for proper operation of a device within specified accuracy are in accordance with requirements in standards IEC61557-12, IEC61326-1, IEC61000-4-30 and IEC61000-4-7. Ambient conditions Ambient temperature K55 temperature class Acc. to EN 61557-12 -10 °C …...
  • Page 173 Technical data Dimensions Dimensional drawing Construction Appearance Dimensions (through-hole connection assignment) All dimensions are in Dimensions (terminal connection assignment) Panel cut-out 96 mm × 96 mm x 96.5 mm Enclosure Dimensions (CT 101.5 mm) Mounting Panel mounting 144 × 144 mm Required mounting hole 92 ×...
  • Page 174 Technical data Connection table Function Terminals Comment CAT II 600V  AC current CAT III 300V Measuring input: CAT II 600V  AC voltage CAT III 300V +  (common) Module 1/2 + Inputs/outputs: +  (common) Module 3/4 + + / AC (L) CAT III 300V ...
  • Page 175 MODBUS/DNP3 Industrial protocol for data transmission Memory card Multimedia memory card. Type SD supported. MiQen Setting Software for ISKRA instruments PA total Power Angle calculated from total active and apparent power Angle between fundamental phase voltage and phase current phase...
  • Page 176 In this document main modbus registers are listed. For complete, latest, Modbus table please visit ISKRA web site. The memory reference for input and holding registers is 30000 and 40000 respectively. PLEASE NOTE For the latest and complete MODBUS table please visit ISKRA web page. User’s Manual...
  • Page 177 Appendix a: MODBUS communication protocol Register table for the actual measurements (1) MODBUS Parameter Register Type Start Actual time 30101 30104 T_Time Frequency 30105 30106 Voltage U 30107 30108 Voltage U 30109 30110 Voltage U 30111 30112 Average phase Voltage U 30113 30114 Phase to phase voltage U...
  • Page 178 Appendix a: MODBUS communication protocol Register table for the actual measurements (2) MODBUS Parameter Register Type Start Power Factor PF1 30166 30167 Power Factor PF2 30168 30169 Power Factor PF3 30170 30171 Total Power Factor PF 30164 30165 Power Angle U1−I1 30173 Power Angle U2−I2 30174...
  • Page 179 Appendix a: MODBUS communication protocol Register table for the actual measurements (3) MODBUS Parameter Register Type Start Max Demand Since Last RESET MD Real Power P (positive) 30542 30543 MD Real Power P (negative) 30548 30549 MD Reactive Power Q − L 30554 30555 MD Reactive Power Q −...
  • Page 180 Appendix a: MODBUS communication protocol Register table for the actual measurements (4) MODBUS Parameter Register Type Start Energy Actual counter is Energy Counter 1 Exponent 30401 calculated: Energy Counter 2 Exponent 30402 exponent Cnt.× 10 Energy Counter 3 Exponent 30403 Energy Counter 4 Exponent 30404 Counter E1...
  • Page 181 Appendix a: MODBUS communication protocol Register table for the actual measurements (5) MODBUS Parameter Register Type Start Flickers Flicker Pst1 30580 Flicker Pst2 30581 Flicker Pst3 30582 Flicker Plt1 30583 Flicker Plt2 30584 Flicker Plt3 30585 Flicker Pf5 - L1 30586 30587 Flicker Pf5 - L2...
  • Page 182 Appendix a: MODBUS communication protocol Register table for the actual measurements (6) MODBUS Parameter Register Type Start Line voltage harmonic data U12 Harmonic Data Base for % calculation 31385 31386 U12 1 Harmonic Abs % 31387 U12 1 Harmonic Phase Angle 31388 U12 Harmonics from 2 to 62 U12 63 Harmonic Abs %...
  • Page 183 Appendix a: MODBUS communication protocol Register table for the actual measurements (7) MODBUS Parameter Register Type Start Phase current harmonic data I1 Harmonic Data Base for % calculation 31769 31770 I1 1 Harmonic Abs % 31771 I1 1 Harmonic Phase Angle 31772 I1 Harmonics from 2 to 62 I1 63 Harmonic Abs %...
  • Page 184 32190 1. Interharmonic Abs % 32191 2. Interharmonic Abs % 32192 3. - 10 Interharmonic 32193 32200 All other MODBUS regiters are a subject to change. For the latest MODBUS register defenitions go to ISKRA web page www.iskra.eu User’s Manual...
  • Page 185 Appendix a: MODBUS communication protocol Register table for the basic settings Values / Pass. Register Content Type Ind Dependencies Level Connection No mode 40143 Mode 1b - Single Phase 3b - 3 phase 3 wire balanced 4b - 3 phase 4 wire balanced 3u - 3 phase 3 wire unbalanced...
  • Page 186 Appendix a: MODBUS communication protocol Data types decoding (1) Type Bit mask Description Unsigned Value (16 bit) Example: 12345 = 3039(16) Signed Value (16 bit) Example: -12345 = CFC7(16) Signed Long Value (32 bit) Example: 123456789 = 075B CD15(16) Short Unsigned float (16 bit) bits # 15…14 Decade Exponent(Unsigned 2 bit) bits # 13…00...
  • Page 187 Appendix a: MODBUS communication protocol Data types decoding (2) Type Bit mask Description Date (32 bit) bits # 31…24 Day of month 01 - 31 (BCD) bits # 23…16 Month of year 01 - 12 (BCD) bits # 15…00 Year (unsigned integer) 1998..4095 Example: 10, SEP 2000 = 1009 07D0(16) Unsigned Value (16 bit), 2 decimal places Example: 123.45 = 3039(16)
  • Page 188 DNP3 protocol enables point to point (for example device to PC) communication via RS232 communication and multi drop communication via RS485. Device automatically responses to MODBUS or DNP3 request. PLEASE NOTE For the latest and complete DNP3 table please visit ISKRA web page. User’s Manual...
  • Page 189 Appendix B: DNP3 communication Issue: E DNP 3.0 Date: 8 Jan 2013 Device Profile Document Device Name: Power Quality Analyzer Vendor Name: ISKRA d.o.o. Models Covered: iMC744 Highest DNP Level Supported: Device Function:  For Requests: 1 Master For Responses: 1 ...
  • Page 190 Appendix B: DNP3 communication Timeouts while waiting for:     Data Link Confirm: None Fixed at ____ Variable Configurable     Complete Appl. Fragment: None Fixed at ____ Variable Configurable     Application Confirm: None Fixed at ____ Variable...
  • Page 191 Appendix B: DNP3 communication Object Request Response Object Variation Function Qualifier Function Qualifier Description Number Number Codes (dec) Codes (hex) Codes (dec) Codes (hex) Device Attributes - software version 00, 17 Device Attributes – hardware version 00, 17 Device Attributes – user assigned ID 00, 17 Device Attributes –...
  • Page 192 Appendix B: DNP3 communication Object Request Response Object Variation Function Qualifier Function Qualifier Description Number Number Codes (dec) Codes (hex) Codes (dec) Codes (hex) 16-Bit Analog Input without flag 00, 01, 06 16-Bit Analog Input with flag 00, 01, 06 00, 01 16-Bit Analog Input without flag 00, 01, 06...
  • Page 193 Appendix B: DNP3 communication Points for object 30 (2) Power Factor Total (PFt) Data CAP/IND P. F. Phase 1 (PF1) Data -1 CAP 300% for -1 IND CAP/IND P. F. Phase 2 (PF2) Data -1 CAP 300% for -1 IND CAP/IND P.
  • Page 194 Appendix B: DNP3 communication Points for object 30 (3) Active Power Total (Pt) - (negative) Data Reactive Power Total (Qt) - L Data Reactive Power Total (Qt) - C Data Apparent Power Total (St) Data Data Data Data ENERGY Energy Counter 1 Data (32-bit value) MOD 20000 Energy Counter 2...
  • Page 195 Appendix B: DNP3 communication Object Request Response Object Variation Function Qualifier Function Qualifier Description Number Number Codes (dec) Codes (hex) Codes (dec) Codes (hex) 16-bit Analog output status 00, 01, 06 16-bit Analog output status 00, 01, 06 00, 01 Points for object 40 Data Analog output 1...
  • Page 196 Appendix C: Equations APPENDIX C: Equations Definitions of symbols Symbol Definition Average interval Phase voltage (U or U Phase-to-phase voltage (U or U Total number of samples in a period Sample number (0 ≤ n ≤ N) x, y Phase number (1, 2 or 3) Current sample n Phase voltage sample n Phase-to-phase voltage sample n...
  • Page 197 Appendix C: Equations Voltage Phase voltage ∑ = √ N − samples in averaging interval (up to 65 Hz) Phase-to-phase voltage ∑ − u − phase voltages (U = √ N − a number of samples in averaging interval 1 − √ 3 − 6β = √...
  • Page 198 Appendix C: Equations Power Active power by phases N − a number of periods i ∑(u n − index of sample in a period f − phase designation Total active power t − total power 1, 2, 3 − phase designation ( φ...
  • Page 199 Appendix C: Equations THD, TDD Current THD √ ∑ 100 − value of first harmonic THD ( % ) = n − number of harmonic Current TDD √ ∑ 100 TDD ( % ) = − value of max. load current (fixed, user defined value) n −...
  • Page 200 Appendix C: Equations Flickers = (P Pst − Short-term flicker intensity = (P Short-term flicker intensity is measured in 10 minute = (P periods. = (P − flicker levels that are exceeded by x% in a 10-minute period (e.g. P represents a flicker level that is exceeded by 0,0314P + 0,0525P...
  • Page 201 Appendix D: XML DATA FORMAT APPENDIX D: XML DATA FORMAT Explanation of XML data format All data, which is prepared to be sent at next time interval is combined into element <data>. It comprises of elements <value>, which contain all information regarding every single reading. Attributes of element <value>...
  • Page 202 Appendix D: XML DATA FORMAT Example of readings <data> package <data logId="033324218" app="ML" storeType="measurement" dataProvider="xml001" controlUnit="MC004475" part="B" datetimeUTC="2009-09-16 3:00:00" dst="60" tzone=" 60" tInterval="015"> <value ident="U1 " unit="V ">234,47</value> <value ident="U2 " unit="V ">234,87</value> <value ident="U3 " unit="V ">234,52</value> <value ident="I1 "...
  • Page 203 Published by Iskra, d.o.o. • Subject to change without notice • Version 1.00 July 2021 •EN K22.444.100 Published by Iskra, d.o.o. • Subject to change without notice • Version 1.00 julij 2021 • EN K22.444.100...

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