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BASIC DESCRIPTION AND OPERATION
The following chapter presents basic information about a MC784 Advanced Power Quality Analyser 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.
Regarding the options of the MC784 Advanced Power Quality Analyser, 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.
The MC784 Advanced Power Quality Analyser is available in housing for panel mounting. Specifications of
housing and panel cut out for housing is specified in chapter
Dimensions|displayasbutton=true;topic=Dimensions
Introduction
Regarding the type of a Measuring centre different chapters should be considered since the types differ in
functionality and design. More detailed description of device functions is given in chapter
Reset|displayasbutton=true;topic=Main Features, supported options and functionality. Al types of measuring
centres are available in DIN or ANSI housing. Devices in DIN housing are marked as types MXxxx, devices in
ANSI housing are marked as types UMXxxx. Specifications of housing and panel cut out for both housings are
specified in chapter Dimensions|displayasbutton=true;topic=Dimensions.
Contents
Contents and size of a packaging box can slightly vary depending on type of consignment.
Single device shipment or a very small quantity of devices is shipped in a larger cardboard box, which offers
better physical protection during transport.
This type of contents contains::





Measuring instrument
Fixation screws
Pluggable terminals for connection of inputs, aux. Power supply and I/O modules
CD with full version of this document, installation of setting software MiQen, required drivers for -USB
(if device is equipped witd USB communication)
Short installation manual
When larger amount of devices is sent they are shipped in a smaller cardboard box for saving space and thus
reducing shipment costs. This type of contents contains:




Measuring instrument
Fixation screws
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 http://www.iskra.eu/.
CAUTION
Please examine the equipment carefully for potential damages which might arise during transport!
Description of The MC784 Advanced Power Quality Analyser
Description of the Quality Analyser
MC774 Quality Analyser 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. Therefore, this device can be used for
utility purposes (evaluation against standards) as well as for industial purposes (e.g. for monitoring supplied
power quality).
Appearance
1-Graphical LCD
2-Navigation keyboard
3-A slot with a cover for
memory card
4-General operation LED
indicators (card/com./alarm)
5-I/O status LED indicators
Graphical LCD
A graphical LCD with back light is used for high resolution of displayed measuring quantities and for a display of
selected functions when setting the device.
Navigation keyboard
The "OK" key is used for confirming the settings, selecting and exiting the display. Direction keys are used for
shifting between screens and menus.
A slot with a cover Memory card
A Quality Analyser is provided with a slot for a full size MMC or SD card that is used for data transfer from the
internal memory, device setting and software upgrading. A slot protection cover for the card prevents
penetration of humidity and dust into device.
LED indicators
There are two types of LED indicators positioned on the front panel. General operation LED indicators and I/O
status LED indicators.
General operation LED indicators warns of a certain state of the device. A left (red) indicator indicates the card
activity and that it should not be pulled out. A middle (green) one is blinking when transmitting MC data via
communication. A right (red) one is blinking when the condition for the alarm is fulfilled.
I/O state LED indicators are in operation when additional Modules A and/or B are built in and they have
functionality of Digital input or Relay output. They are indicating the state of a single I/O. Red LED is lit when:


Relay output is activated
Signal is present on Digital input
Abbreviation/Glossary
Abbreviations are explained within the text where they appear the first time. Most common abbreviations and
expressions are explained in the following table:
Term
Explanation
RMS
Root Mean Square value
Flash
Type of a memory module that keeps its content in case of power
supply failure
Ethernet
IEEE 802.3 data layer protocol
MODBUS / DNP3
Industrial protocol for data transmission
Memory card
Multimedia memory card. Type MMC and SD supported.
MiQen
Setting Software for Iskra instruments
PA total
Power Angle calculated from total active and apparent power
PAphase
Angle between fundamental phase voltage and phase current
PFphase
Power factor, calculated from apparent and active power (affected by
harmonics)
THD (U, I)
Total harmonic distortion
MD
Max. Demand; Measurement of average values in time interval
FFT graphs
Graphical display of presence of harmonics
Harmonic voltage − harmonic
Sine voltage with frequency equal to integer multiple of basic
frequency
InterHarmonic voltage −
interharmonic
Sine voltage with frequency NOT equal to integer multiple of basic
frequency
Flicker
Voltage fluctuation causes changes of luminous intensity of lamps,
which causes the so-called flicker
RTC
Real Time Clock
Sample factor
Defines a number of periods for measuring calculation on the basis of
measured frequency
Mp − Average interval
Defines frequency of refreshing displayed measurements
Hysteresis [%]
Percentage specifies increase or decrease of a measurement from a
certain limit after exceeding it.
IRIG-B
Serial Inter-range instrumentation group time code
GPS
Satellite navigation and time synchronisation system
PO
Pulse output module
TI
Tariff input module
RO
Relay output module
BO
Bistable alarm output module
AO
Analogue output module
DI
Digital input module
PI
Pulse input module
AI
Analogue input module
WO
Status (watchdog) module – for supervision of proper operation
List of common abbreviations and expressions
Description of the MC7X0
A measuring centre is used for measuring, analyzing and monitoring three phase electrical power network.
Using the latest technologies and numerical methods we have reached high accuracy over a wide measuring
range of voltage, current and integrated quantities.
Appearance
The device figure can differ from yours depending on the type.
1 - Graphical LCD
2 - Navigation keyboard
3 - A slot with a cover for memory
card
4 - LED indicators
Graphical LCD
A graphical LCD with back light is used for high resolution of displayed measuring quantities and for a display of
selected functions when setting the device.
Navigation keyboard
The "OK" key is used for confirming the settings, selecting and exiting the display. Direction keys are used for
shifting between screens and menus.
A slot with a cover for MMC or SD Memory card
The device is provided with a slot for a full size MMC or SD card that is used for data transfer from the internal
memory, device setting and software upgrading. A slot protection cover for the card prevents penetration of
humidity and dust into device.
LED indicators
LED indicators warn of a certain state of the device. A left (red) indicator indicates the card activity and that it
should not be pulled out. A middle (green) one is blinking when transmitting MC data via communication. A
right (red) one is blinking when the condition for the alarm is fulfilled.
Description of the MC3x0
A measuring centre is used for measuring, analysing and monitoring three phase electrical power network.
Using the latest technologies and numerical methods we have reached high accuracy over a wide measuring
range of current and integrated quantities.
Appearance
The meter figure can differ from yours depending on the type.
1 − Graphical LCD
2 − Navigation keyboard
3 − LED indicators
Graphical LCD
A graphical LCD with back light is used for high resolution of displayed measuring quantities and for a display of
selected functions when setting the device.
Navigation keyboard
The "OK" key is used for confirming the settings, selecting and exiting the display. Direction keys are used for
shifting between screens and menus.
LED indicators
LED indicators warn of a certain state of the instrument. A left (red) one is blinking as pulse output. A right (red)
one is blinking when the condition for the alarm is fulfilled.
Description of the MT440
Measuring transducer is intended for measuring, analyzing and monitoring single-phase or three-phase
electrical power network. It measures RMS value by means of fast sampling of voltage and current signals,
which makes instrument suitable for acquisition of transient events. A built-in microcontroller calculates
measurements (voltage, current, frequency, energy, power, power factor, THD phase angles, etc.) from the
measured signals.
Appearance
Measuring transducer can differ from yours depending on the type and functionality.
1 – Communication ports
2 – I/O modules
3 – Auxiliary supply
4 – Voltage inputs
5 – Current inputs
6 – Power ON LED
Communication ports and LED indicators
Serial communication can be connected by using screw-in connector (RS232 or RS485). USB can be connected
through USB-mini type connector at the bottom of transducer.
LED indicator is intended for POWER ON signaling (red LED).
WARNING!
USB communication port is provided with only BASIC insulation and can ONLY be used unconnected to aux.
supply AND power inputs!
I/O modules
Four I/O module slots are intended for various I/O modules, which should be chosen at placing the order.
Analog outputs, fast analog outputs, relay outputs (alarm, pulse, general-purpose digital outputs) and solidstate relay outputs (alarm, pulse, general-purpose digital outputs).
Universal auxiliary supply
Auxiliary supply is connected by two screw-in connectors. For safety purposes it is important that all wires are
firmly fastened. Auxiliary supply is wide range (24 VDC – 300 VDC; 40 VAC – 276 VAC).
Voltage inputs
. Maximum
value of input voltage is 600 VL-N (1000 VL-L).
Current inputs
allowed thermal value of input current is 15A (cont.).
Description of the MT5X0
Measuring transducer is intended for measuring, analyzing and monitoring single-phase or three-phase
electrical power network. It measures RMS value by means of fast sampling of voltage and current signals,
which makes instrument suitable for acquisition of transient events. A built-in microcontroller calculates
measurements (voltage, current, frequency, energy, power, power factor, THD phase angles, etc.) from the
measured signals.
Appearance
Measuring transducer can differ from yours depending on the type and functionality.
1 – Communication ports
and LED indicators
2 – I/O modules
3 – Auxiliary supply
4 – Voltage inputs
5 – Current inputs
Communication ports and LED indicators
Under the sliding, semitransparent cover are connectors for various communication types, which should be
chosen at placing the order. Serial communication can be connected through DB9 connector (RS232 or RS485)
or screw-in connector (RS485 only). Ethernet communication can be connected through standard RJ-45 type
connector. USB can be connected through USB-B type connector. There is also additional communication port
(RS485), which is intended for Remote display connection (RJ-11 type connector).
Two LED indicators are intended for POWER ON signaling (red LED) and COMMUNICATION IN PROGRESS
signaling (green LED blinking).
I/O modules
Four I/O module slots are intended for various I/O modules, which should be chosen at placing the order. Tariff
inputs, digital inputs, digital outputs, analogue inputs, analogue outputs, pulse inputs, pulse outputs alarm
outputs, and additional (COM2) communication port.
Auxiliary supply
Auxiliary supply is connected through three screw-in connectors. For safety purposes it is important that all
three wires (Line, Neutral and Earth) are firmly connected. Auxiliary supply can be either LOW (19 VDC – 70
VDC; 48 VAC – 77 VAC) or HIGH (70 VDC – 300 VDC; 80 VAC – 276 VAC), which should be chosen at placing the
order.
Voltage inputs
Each voltage input is connected to measuring circuit through in
value of input voltage is 600 VL-N (1000 VL-L).
Current inputs
allowed thermal value of input current is 15A (cont.).
Purpose and use of the device
MC784 Advanced Power Quality Analyser performs measurements in compliance with regulatory requested
standard EN 61000-4-30 and evaluates recorded parameters for analysis according to parameters defined in
European supply quality standard EN 50160:2011.
Moreover device stores measurements and quality reports in internal memory for further analysis over
recorded measurements. From multiple devices installed on different locations, user can gain the overall
picture of system behaviour. This can be achieved with regard to its accurate internal real time clock and wide
range of synchronization sources support, which assure accurate, time-stamped measurements from
dislocated units.
All required measurements, weekly PQ reports and alarms can also be stored locally in an internal memory.
Stored data can be then transferred to a memory card or accessed through communication for post analysis.
The internal memory capacity enables storing of more than 170,000 variations of the measurements from the
standard values, which enables finding eventual reasons for the problems in network. Limits and required
quality in a monitored period can be defined for each monitored characteristic. The following characteristics
are measured and recorded:
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 & THD
THD
Harmonics
Inter-harmonics
Signalling voltage
Purpose and use of measuring transducer
The instrument is used for monitoring and measuring electric quantities of three-phase electrical power
distribution system. The meter is provided with 32 program adjustable alarms, up to four different modules
and communication. With the RS232/RS485 and USB communication, the meter can be set and measurements
can be checked. The meter also functions as an energy counter (up to four energy counters), with the
additional function of cost management by tariffs.
Supported measurements
Basic measurements
Voltage U1, U2, U3 and U~
Current I1, I2, I3, In, It and Ia
Active power P1, P2, P3, and Pt
Reactive power Q1, Q2, Q3, and Qt
Phase
Apparent power S1, S2, S3, and St
Power factor PF1, PF2, PF3 and PF~
Power angle φ1, φ2, φ3 and φ~
THD of phase voltage Uf1, Uf2 and Uf3
THD of power angle I1, I2 and I3
Phase-to-phase voltage U12, U23, U31
Phase-to-phase
Average phase-to-phase voltage Uff
Phase-to-phase angle φ12, φ23, φ31
THD of phase−to−phase voltage
Counter 1
Counter 2
Energy
Counter 3
Counter 4
Active tariff
Other measurements
Phase current I1, I2, I3
Active power P (Positive)
MD values
Active power P (Negative)
Reactive power Q − L
Reactive power Q − C
Apparent power S
Other measurements
Measurements
Frequency
Internal temperature
Purpose and use of different types of MC7X0
Multifunction meter MC740 / UMC740
The device is used 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. The device also functions as an energy counter, with the additional function of cost management by
tariffs. A tariff input or a tariff clock can be set. At tariff clock setting, four seasons and four day groups as well
as energy cost for each period and a day group (16 different cost periods) are available. Additionally, 20 places
are available for setting holidays. As an energy counter it can record energy in all four quadrants in four tariffs.
Network recorder MC750 / UMC750
The device is used for monitoring, measuring and recording measurements of electric quantities of electrical
power distribution system. Up to 64 measurements and up to 32 alarms are recorded in the internal memory.
The memory is separated into four sections for measurements (A, B, C and D) and one section for recording
alarms. The memory division is defined by the user via communication or a memory card.
Network analyzer MC760 / UMC760
The device is used for permanent analysis of electricity supply quality in compliance with the EN 50160
standard. A partition in the internal memory is reserved for storing reports for a period of the last seven years.
The internal memory capacity enables storing of more than 170,000 variations of the measurements from the
standard values, which enables finding eventual reasons for the problems in network. Limits and required
quality in a monitored period can be defined for each monitored characteristic. The following characteristics
are measured and recorded:
-Frequency variations
-Voltage variations
-Voltage unbalances
-Voltage dips
-Voltage interruptions
-Rapid voltage changes
-Flickers Pst & Plt
-Temporary over voltages
-THD's
-Harmonics
Purpose and use of different types of MC3X0
Energy meter MC320
The instrument is used for monitoring and measuring electric quantities of electrical power system. As the
energy counter, instrument records energy in all four quadrants in four tariffs. Two different modules that are
optionally built in two module places in the meter are available for controlling measurements. Available is one
input and one output module.
Multifunction meter MC330
The instrument is used for monitoring and measuring electric quantities of three-phase electrical power
distribution system. The meter is provided with 16 program adjustable alarms, Configuration can have one
input, one output modules and communication module (RS232 or RS485 or USB). With the communication
meter can be set and measurements can be checked. The meter also functions as an energy counter with
tariffs. As an energy counter it can record energy in all four quadrants in four tariffs. Different modules that are
optionally built in two module places in the meter are available for controlling measurements. Available is one
input and one output module.
Recorder MC350
The instrument is used for monitoring and measuring electric quantities of electrical power system. It includes
all functionality of MC330 and as addition it has 8Mb of flash memory built in. So it's additional functionality is
that it measures and stores selected measured quantities and alarms in to recorder, where they are available
for further analysis. At tariff clock setting, four seasons and four day groups are available. Additionally, 20
places are available for setting holidays. As an energy counter it can record energy in all four quadrants in four
tariffs.
Purpose and use of different types of measuring transducer
Multifunction transducer MT540 / UMT540
The instrument is used for monitoring and measuring electric quantities of three-phase electrical power
distribution system. The meter is provided with 32 program adjustable alarms, up to four input or output
modules and communication. With the RS232/RS485, Ethernet or USB communication, the meter can be set
and measurements can be checked. The meter also functions as an energy counter, with the additional
function of cost management by tariffs. A tariff input or a tariff clock can be set. At tariff clock setting, four
seasons and four day groups as well as energy cost for each period and a day group (16 different cost periods)
are available. Additionally, the instrument can store up to 20 holidays. As an energy counter it can record
energy in four tariffs in all four quadrants of the load power diagram.
Network recorder MT550 / UMT550
The instrument is used for monitoring, measuring and recording measurements of electric quantities of
electrical power distribution system. The (U)MT550 measure all parameters like (U)MT540 and up to 32
measurements and up to 32 alarms could be recorded in the internal memory. The memory is separated into
two sections for measurements (A and B) and one section for recording alarms. The memory division is defined
by the user via communication.
Network analyzer MT560 / UMT560
The instrument measure all parameters like (U)MT550 and is used also for permanent analysis of electricity
supply quality in compliance with the SIST EN 50160 standard. A partition in the internal memory is reserved
for storing reports for a period of the last seven years. The internal memory capacity enables storing of more
than 170,000 variations of the measurements from the standard values, which enables finding eventual
reasons for the problems in network. Limits and required quality in a monitored period can be defined for each
monitored characteristic. The following characteristics are measured and recorded:
-Frequency variations
-Voltage variations
-Voltage unbalances
-Voltage dips
-Voltage interruptions
-Rapid voltage changes
-Flickers Pst & Plt
-Temporary overvoltages
-THD's
-Harmonics
Remote display RD500
Remote display is very useful for a quick look-up to all measured parameters or to set up the (U)MT5xx
measuring transducers without the PC. A graphical display with the resolution of 128x64 enables graphical
representation of signals and parameters. With five select buttons it is possible to browse through the userfriendly menu.
Main Features, supported options and functionality
MC784 Advanced Power Quality Analyser 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 and record possible disturbances caused by
(unauthorized) operation of consumers.
User can select different hardware modules that can be implemented in device. Wide range of variants can
cover practically every user’s requirements.
MC784 Advanced Power Quality Analyser is a compact, user friendly and cost effective device that offers
various features to suit most of the requirements for a demanding power system management:













PQ analysis in compliance with EN 50160 with automatic report generation
High accuracy in compliance with Class A (0.1%) EN61000-4-30
Measurements of instantaneous values of more than 140 quantities including harmonics, flicker,
power line signalling voltage, unbalance…
Four quadrant energy measurement with class 0.2S for active energy, 8 programmable counters, up to
four tariffs, tariff clock…
Recording all measured parameters including all voltage and current harmonics up to 65 th, 32
adjustable alarms, anomalies and quality reports in the internal memory
Automatic range selection of 4 current and 4 voltage channels (max. 12.5 A and 1000 Vrms) with
32 kHz sampling rate
MODBUS and DNP3 communication protocols
Support for effective sub metering applications (comprehensive counters settings, tariff and cost
management)
Support for GPS, IRIG-B (modulated and digital) and NTP real time synchronisation
Up to 20 inputs and outputs
Multilingual support
User-friendly setting and evaluation software, MiQen
CE certification
General hardware Features
Default / Optional
General
Class A measuring accuracy according to EN 61000-4-30
Voltage auto range up to 1000Vp-pRMS
Current auto range up to 12.5 A
4 voltage and 4 current channels with 32 us sampling time
Universal power supply type High or type Low
Two independent communication ports (see data below)
Support for GPS, IRIG-B and NTP real time synchronisation
Up to 20 additional inputs and outputs (see data below)
Internal flash memory (8MB)
Real time clock (RTC)
standard 144 mm DIN square panel mounting
Front panel
Graphical LCD display with back light
LED indicator (card/com./alarm)
I/O status LED indicator
SD memory card slot for data transfer
Control keys on front panel (5 keys)
Communication
COM1: Ethernet +USB / USB / Serial (RS232/485)
COM2: Serial (RS232/ RS485 on slot C if other synchronisation modes are in use)
●
○
− Function is supported (default)
− Optional (to be specified with an order)
General hardware Features
Default / Optional
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 / 2×TI / 1×BO / 2×DI / WO+RO
Auxiliary input / output module A
I/O A
(1-8) DI / RO
Auxiliary input / output module B
I/O B
(1-8) DI / RO
Synchronisation module C
○/○/○/○/○/○/○/○/○
○/○/○/○/○/○/○/○/○
○/○
○/○
I/O C
GPS + 1pps / IRIG-B / COM2
●
○
Function is supported (default)
Optional (to be specified with an order)
PO
TI
RO
BO
AO
DI
PI
AI
WO
Pulse output module
Tariff input module
Relay output module
Bistable relay output module
Analogue output module
Digital input module
Pulse input module
Analogue input module – U, I or R (PT100/1000)
Status (watchdog) module – for supervision of proper operation
General software Features
Setup wizard
Wrong connection warning
Custom screen settings (3 user defined screens on LCD)
●/●/●
Default / optional
●
●
●
●
●
●
●
●/○
○
●/●/○
○
●
●
●
●
●
●
●
●
●/○/○
●
Demonstration screen cycling
Programmable refresh time
MODBUS and DNP3 communication protocols
Tariff clock
MD calculation (TF, FW, SW)
Wide frequency measurement range 16 – 400 Hz
Programmable alarms (32 alarms)
Alarms recording
Measurements recording (128 quantities)
Measurements graphs (time / FFT)
Evaluation of voltage quality in compliance with EN 50160
Real time clock synchronisation (GPS/IRIG-B/NTP)
●
●
●
●
●
●
●
●
●
●
●
●
Type differences MC7X0
Different types differ on functionality and equipment as shown in the following table.
User can select different hardware modules that can be implemented in device. By selection of right device and
module combination practically every user’s demand can be cowered.
Differences in hardware
MC740
MC750
MC760
UMC740
UMC750
UMC760
Graphical LCD display



Back light of LCD display



LED indicator (card/com./alarm)
//
//
//
Slot for card



Control keys on front panel (5)



Internal flash memory

8Mb
8Mb
Real time clock (RTC)



/
/
/
Feature
Communication interface
RS232 and RS485 or Ethernet/USB
I/O 1
AO/AI/AL/PO/PI/TI/DO/DI/WD


I/O 2
AO/AI/AL//PO/PI/TI/DO/DI/-



I/O 3
AO/AI/AL/COM2/COMEX/PO/PI/TI/DO/DI/WD



I/O 4
AO/AI/AL/COM2/COMEX/PO/PI/TI/DO/DI/-


Automatic current range



AC or universal supply
/
/
/
 - serial
 - option
 - not supported


Software functions
Basic
Functions
MC750
MC760
UMC740
UMC750
UMC760
Setup wizard



Wrong connection warning



Custom screens (3)



Demonstration screen cycling



Programmable refresh time









//
//
//
Programmable alarms (32)



Alarms recording



Measurements recording



/
/
/



MODBUS and DNP3 protocols
Tariff clock
MD calculation (TF, FW, SW)
Additional
MC740
Measurements graphs (time/FFT)
Evaluation of voltage quality in
compliance with EN 50160
 - serial
 - not supported
Supported measurements
Energy
Phase-to-phase
Phase
Basic measurements
MC740
MC750
MC760
UMC740
UMC750
UMC760
Voltage U1, U2, U3 and U~



Current I1, I2, I3, In, It and Ia



Active power P1, P2, P3, and Pt



Reactive power Q1, Q2, Q3, and Qt



Apparent power S1, S2, S3, and St



Power factor PF1, PF2, PF3 and PF~



Power angle φ1, φ2, φ3 and φ~



THD of phase voltage Uf1, Uf2 and Uf3



THD of power angle I1, I2 and I3



Phase-to-phase voltage U12, U23, U31



Average phase-to-phase voltage Uff



Phase-to-phase angle φ12, φ23, φ31



Voltage unbalance Uu



THD of phase-to-phase voltage



Counter 1



Counter 2



Counter 3



Counter 4



Total



Active tariff



Cost by counters



Total cost



 - serial
 - not supported
Supported measurements
MD values
Min / Max
Other measurements
MC740
MC750
MC760
UMC740
UMC750
UMC760
Voltage U1, U2, U3



Phase-to-phase voltage U12, U23, U31



Phase current I1, I2, I3



Active power P1, P2, P3, P



Apparent power S1, S2, S3, S



Frequency f



Internal temperature



Phase current I1, I2, I3



Active power P (Positive)



Active power P (Negative)



Reactive power Q − L



Measurement
Reactive power Q − C



Apparent power S



Frequency



Internal temperature



Date & Time



Time graphs
(I1, I2, I3,U1, U2, U3, U12, U23 and U31)



FFT graphs
(I1, I2, I3,U1, U2, U3, U12, U23 and U31)



Phase voltage harmonics



Phase-to-phase voltage harmonics



Current harmonics



Flicker (Pst, Plt, Pi, Pim)



Analysis in compliance with
EN 50160



 - serial
Harmonics up to
 - not supported
63rd
Flicker Pi and Pim on display only.
Type differences MC3X0
Different types differ on functionality and equipment as shown in the following table.
Differences in hardware
Feature
MC320
MC330
MC350
Graphical LCD display
●
●
●
Back light of LCD display
●
●
●
●/×
●/●
●/●
●
●
●
LED indicator (pulse/alarm)
Control keys on front panel (5)
Communication interface RS232 or RS485 or
USB
○
●
○
Module 1
(2S0/2RO)
○/×
○/○
●/○
Module 2
(2TI/2DI)
○/×
○/○
●/○
Automatic voltage range
○
○
●
Automatic current range
●
●
●
●/○
●/○
○/●
Real time clock (RTC) with tariff clock
×
×
●
8MB flash memory for recorder and alarm
×
×
●
AC or universal supply
● – serial
○ – option
× − not supported
Software functions
Basi
c
Functions
Setup wizard
MC320
MC330
MC350
●
●
●
Additional
Wrong connection warning
●
●
●
Custom screens (3)
×
●
●
Demonstration screen cycling
●
●
●
Programmable refresh time
●
●
●
MODBUS and DNP3 protocol
MD calculation (TF)
Programmable alarms (16)
●
×
●
●
●
●
×
●
●
● – serial
× − not supported
Supported measurements
Energy
Phase-to-phase
Phase
Basic measurements
MC320
MC330
MC350
Voltage U1, U2, U3 and U~
×
●
●
Current I1, I2, I3, In, It and I~
×
●
●
Active power P1, P2, P3, and Pt
×
●
●
Reactive power Q1, Q2, Q3, and Qt
×
●
●
Apparent power S1, S2, S3, and St
×
●
●
Power factor PF1, PF2, PF3 and PF
×
●
●
Power angle φ1, φ2, φ3 and φ
×
●
●
THD of phase voltage U1, U2 and U3
×
●
●
THD of power angle I1, I2 and I3
×
●
●
Phase-to-phase voltage U12, U23, U31
×
●
●
Average phase-to-phase voltage Uff
×
●
●
Phase-to-phase angle φ12, φ23, φ31
×
●
●
THD of phase−to−phase voltage
×
●
●
Counter 1
●
●
●
Counter 2
●
●
●
Counter 3
●
●
●
Counter 4
●
●
●
Total
●
●
●
Active tariff
●
●
●
● – serial
MD values
Other measurements
× − not supporte
MC320
MC330
MC350
Phase current I1, I2, I3
×
●
●
Active power P (Positive)
×
●
●
Active power P (Negative)
×
●
●
Reactive power Q − L
×
●
●
Reactive power Q − C
×
●
●
Apparent power S
×
●
●
● – serial (thermal function)
× − not supported
Other measurements
MC320
MC330
MC350
Frequency
×
●
●
Internal temperature
●
●
●
● – serial
× − not supported
Type differences MT5X0
Different types differ on functionality and equipment as shown in the following table.
Differences in hardware
Feature
MT540
UMT540
MT550 UMT550
MT560 UMT560
RD500
Internal flash memory
×
8Mb
8Mb
×
Real time clock (RTC) with battery
●
●
●
×
●/○/○
●/○/○
●/○/○
RS485
Communication interface
RS232 and RS485 / Ethernet / USB
I/O
1
AO/AI/AL/COM2/PO/PI/TI/DO/DI ○/○/○/×/○/○/○/○/○
○/○/○/×/○/○/○/○/○
○/○/○/×/○/○/○/○/○
×
I/O
2
AO/AI/AL/COM2/PO/PI/TI/DO/DI ○/○/○/×/○/○/○/○/○
○/○/○/×/○/○/○/○/○
○/○/○/×/○/○/○/○/○
×
I/O
3
AO/AI/AL/COM2/PO/PI/TI/DO/DI ○/○/○/×/○/○/×/○/○
○/○/○/×/○/○/×/○/○
○/○/○/×/○/○/×/○/○
×
I/O
4
AO/AI/AL/COM2/PO/PI/TI/DO/DI ○/○/○/○/○/○/×/○/○
○/○/○/○/○/○/×/○/○
○/○/○/○/○/○/×/○/○
×
Automatic voltage / current range
●/●
●/●
●/●
×/×
Universal power supply LO / HI
○/○
○/○
○/○
×
Universal power supply
×
×
×
●
Graphical LCD display
×
×
×
●
LED indicator: Power/Comm./Alarm
●/●/×
●/●/×
●/●/×
×/●/●
Control keys on front panel (5)
×
×
×
●
● – serial
○ – option
× − not supported
AO-analogue out, AI-analogue in, AL-alarm/digital out, PO -pulse out, PI-pulse in, TI-tariff in, DOdigital out, DI-digital in, COM2-additional communication port
Software functions
Basic
Functions
MT540
MT550
MT560
UMT540
UMT550
UMT560
RD500
MODBUS and DNP3 protocols
●
●
●
×
Tariff clock
●
●
●
×
MD calculation (TF, FW, SW)
●/●/●
●/●/●
●/●/●
×/×/×
Programmable alarms (32)
●
●
●
×
Alarms recording
×
●
●
×
Remote
Measurements recording
×
●
●
×
Measurements graphs (time/FFT)
●/●*
●/●*
●/●
×/×
Evaluation of voltage quality in
compliance with EN 50160
×
×
●
×
Setup wizard
×
×
×
●
Wrong connection warning
×
×
×
●
Custom screens (3)
×
×
×
●
Demonstration screen cycling
×
×
×
●
Programmable refresh time
×
×
×
●
● – serial
× − not supported
* (U)MT540 & (U)MT550 support harmonic analysis up to 31st harmonic, (U)MT560 up to 63rd
Supported measurements
Energy
Phase-to-phase
Phase
Basic measurements
MT540
MT550
MT560
UMT540
UMT550
UMT560
Voltage U1, U2, U3 and U~
●
●
●
Current I1, I2, I3, In, It and Ia
●
●
●
Active power P1, P2, P3, and Pt
●
●
●
Reactive power Q1, Q2, Q3, and Qt
●
●
●
Apparent power S1, S2, S3, and St
●
●
●
Power factor PF1, PF2, PF3 and PF~
●
●
●
Power angle φ1, φ2, φ3 and φ~
●
●
●
THD of phase voltage Uf1, Uf2 and Uf3
●
●
●
THD of power angle I1, I2 and I3
●
●
●
Phase-to-phase voltage U12, U23, U31
●
●
●
Average phase-to-phase voltage Uff
●
●
●
Phase-to-phase angle φ12, φ23, φ31
●
●
●
Voltage unbalance Uu
●
●
●
THD of phase−to−phase voltage
●
●
●
Counter 1
●
●
●
Counter 2
●
●
●
Counter 3
●
●
●
Counter 4
●
●
●
Total
●
●
●
Active tariff
●
●
●
Cost by counters
●
●
●
Total cost
●
●
●
● – serial
× − not supported
MD values
Min / Max
Other measurements
MT540
MT550
MT560
UMT540
UMT550
UMT560
Voltage U1, U2, U3
●
●
●
Phase-to-phase voltage U12, U23, U31
●
●
●
Phase current I1, I2, I3
●
●
●
Active power P1, P2, P3, P
●
●
●
Apparent power S1, S2, S3, S
●
●
●
Frequency f
●
●
●
Internal temperature
●
●
●
Phase current I1, I2, I3
●
●
●
Active power P (Positive)
●
●
●
Active power P (Negative)
●
●
●
Reactive power Q − L
●
●
●
Reactive power Q − C
●
●
●
Apparent power S
●
●
●
● – serial
× − not supported
Measurement
Other measurements
MT540
MT550
MT560
UMT540
UMT550
UMT560
Frequency
●
●
●
Internal temperature
●
●
●
Date & Time
●
●
●
Time graphs (I1, I2, I3,U1, U2, U3, U12, U23 and
U31)
●
●
●
FFT graphs (I1, I2, I3,U1, U2, U3, U12, U23 and
U31)
●
●
●
Phase voltage harmonics
●*
●*
●
Phase−to−phase voltage harmonics
●*
●*
●
Current harmonics
●*
●*
●
Analysis in compliance with
SIST EN 50160
×
×
●
● – serial
× − not supported
*Harmonics up to 63 r d