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Summary of Contents for Iskra iMT440
- Page 1 CONTENTSiMT440 MEASURING TRANSDUCER Multifunction Transducer iMT440 July 2021• Version 1.00 User's Manual SR100 Supervision Relay...
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Page 3: Table Of Contents
CONTENTS Contents iMT440 MEASURING TRANSDUCER ................1 SECURITY ADVICE AND WARNINGS ................2 Warnings, information and notes regarding designation of the product ........ 3 Before switching the device on ....................3 Device switch-of Warning ......................4 Disposal ............................. 4 BASIC DESCRIPTION AND OPERATION ................5 Contents ............................ - Page 4 THD − Total harmonic distortion ....................34 TEHNICAL DATA ......................35 Accuracy ..........................35 Inputs ............................36 Connection ..........................36 I/O modules ..........................37 Communication ........................38 Electronic features ........................38 Safety features ........................38 Mechanical ..........................39 User's Manual iMT440 Measuring transducer...
- Page 5 Contents Environmental conditions ....................... 39 Dimensions ..........................39 Connection table ........................40 APPENDICES .........................41 Appendix A ..........................41 Appendix B ..........................50 User's Manual iMT440 Measuring transducer...
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Page 7: Imt440 Measuring Transducer
MEASURING TRANSDUCER iMT440 MEASURING TRANSDUCER User's Manual iMT440 Measuring transducer... -
Page 8: Security Advice And Warnings
PLEASE NOTE ISKRA d.o.o. assumes no responsibility in connection with installation. This booklet contains instructions for installation and use of measuring instrument. Installation and use of a device also includes handling with dangerous currents and voltages therefore should be installed, operated, serviced and maintained by qualified persons only. 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 9: Warnings, Information And Notes Regarding Designation Of The Product
Proper connection and voltage level of I/O modules. Important: A current transformer secondary should be short circuited before connecting the device. WARNING A current transformer secondary should be short circuited before connecting the transducer. User's Manual iMT440 Measuring transducer... -
Page 10: Device Switch-Of Warning
The complete procedure after lifetime should comply with the Directive 2002/96/EC about restriction on the use of certain hazardous substances in electrical and electronic equipment. User's Manual iMT440 Measuring transducer... -
Page 11: Basic Description And Operation
Fixation screws Short installation manual This document and settings software MiQen can also be found on our web page www.iskra.eu. CAUTION Please examine the equipment carefully for potential damages which might arise during transport! Description Measuring transducer is intended for measuring, analysing and monitoring single-phase or three-phase electrical power network. - Page 12 USB-mini type connector at the bottom of transducer. LED indicator is intended for POWER ON signalling (red LED). WARNING USB communication port is provided with only BASIC insulation and can ONLY be used unconnected to aux. supply AND power inputs! User's Manual iMT440 Measuring transducer...
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Page 13: Abbreviation/Glossary
Explanation Root Mean Square value MODBUS Industrial protocol for data transmission MiQen Setting Software for ISKRA d.o.o. instruments Alternating voltage PA total Angle calculated from total active and apparent power PA1, PA2, PA3 Angle between fundamental phase voltage and phase current... -
Page 14: Purpose And Use Of Different Type Of Measuring Transducer
Multifunctional transducer is intended for measuring and monitoring single-phase or three-phase electrical power network. iMT440 measures true RMS value by means of fast sampling of voltage and current signals, which makes instruments 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. - Page 15 Active power P (Negative) ● Reactive power Q − L ● Reactive power Q − C ● Apparent power S ● Other measurements Measurement Frequency ● Internal temperature ● ● – serial × − not supported User's Manual iMT440 Measuring transducer...
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Page 16: Connection
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 17: Mounting
(aux. supply and measuring input terminals), transducer MUST BE ISOLATED OR DISCONNECTED from hazardous live voltage. PLEASE NOTE For proper connection wire diameters and other wiring requirements see chapter Connection. Multifunctional transducer iMT440 System/connection Terminal assignment Connection 1b (1W) Single phase connection User's Manual iMT440 Measuring transducer... - Page 18 Connection 3u (2W3u) Three phase, three wire connection with unbalanced load Connection 4b (1W4b) Three phase, four wire connection with balanced load Connection 4u (3W4u) Three phase, four wire connection with unbalanced load User's Manual iMT440 Measuring transducer...
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Page 19: Connection Of Input/Output Modules
Note on the next page. Instrument will establish USB connection with PC approx. 3 seconds after physical connection to USB port. More detailed information about communication is given in chapter Communication. COM1 serial communication port (RS232) COM1 serial communication port (RS485) User's Manual iMT440 Measuring transducer... -
Page 20: Rs232
RS485 RS485 communication is intended for connection of multiple devices to a network where devices with RS485 communication are connected to a common communication interface. We suggest using one of the ISKRA d.o.o. communication interfaces! For proper operation it is necessary to assure the corresponding connection of individual terminals (see table: Survey of communication connection). -
Page 21: Survey Of Communication Connection
When iMT4xx is connected to a PC through USB communication for the first time, a user is prompted to install a driver. The driver is automatically installed during MiQen software installation. MiQen software can be downloaded on ISKRA d.o.o. website (www.iskra.eu/download/software). With driver installed, USB is redirected to a serial port, which should be selected when using MiQen software. -
Page 22: Settings
PC. 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) or USB communication (depending on device equipment). A user-friendly interface consists of six segments: Connection, Settings, Measurements, Analysis, My devices and Upgrades. -
Page 23: Setting Procedure
Upgrades In Upgrades section latest software, both for MiQen and ISKRA d.o.o. measuring devices can be found. The latest version should always be used to assure full functionality. Manual or automatic checking for upgrades is available. - Page 24 With this method a reactive power and energy are calculated based on assumption that all power (energy) that is not active is reactive. – P This means also that all higher harmonics will be measured as reactive power (energy). Delayed current method User's Manual iMT440 Measuring transducer...
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Page 25: Connection
If this setting is set to REVERSED it has the same influence as if CT’s would be reversely connected. All power readings will also change its sign. This setting is useful to correct wrong CT connections. User's Manual iMT440 Measuring transducer... -
Page 26: Communication
2400 to 115200 Parity none data bits stop bits Modbus table Modbus is enabled via RS232/RS485 or USB. The response is the same type as the request. See chapter Appendix A - Modbus communication protocol. User's Manual iMT440 Measuring transducer... -
Page 27: Usb Communication
>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 28: Password Locks Time >Min)
The counter divider additionally defines precision of a certain counter, according to settings of common energy exponent. An example for 12.345kWh of consumed active energy: Common energy exponent Counter divider Example of result, displayed 12.345 kWh 12.3 kWh 0.01 MWh User's Manual iMT440 Measuring transducer... -
Page 29: Inputs And Outputs
-1 … 0 … 1 mA -1 … 0 … 1 V -5 … 0 … 5 mA -10 ... 0 ... 10 mA -10 … 0 … 10 V -20 ... 0 ... 20 mA User's Manual iMT440 Measuring transducer... -
Page 30: Fast Analogue Output Module
The only difference is its faster response time (≤ 60 ms), and consequential higher ripple. For a proper behavior of fast analogue output module (fast response), average interval shall be set to minimum (1 period). User's Manual iMT440 Measuring transducer... -
Page 31: Relay Output Module
4 - OFF Module 2 (if installed) 40725 3 - ON 4 - OFF Module 3 (if installed) 40728 3 - ON 4 - OFF Module 4 (if installed) 40731 3 - ON 4 - OFF User's Manual iMT440 Measuring transducer... -
Page 32: Alarms
Alarms are used for alarming exceeded set values of the measured quantities. Alarms setting iMT440 supports setting up to 32 alarms in four alarm groups. Alarms can be set for any of measured parameters by setting condition and a limit value. -
Page 33: Measurements
Press the System symbol to observe the measurements of total energy. Press the L1, L2, or L3 symbols to observe the consumption profile of energy of the first, second, or third phase (see picture below, the symbols are surrounded by red). User's Manual iMT440 Measuring transducer... -
Page 34: Available Connections
Connection 4u (3W4u) – Three phase, four wire connection with unbalanced load PLEASE NOTE Measurements support depends on connection mode and device type. Calculated measurements (for example voltages U1 and U2 when 3-phase, 4-wire connection with a balanced load is used) are only informative. User's Manual iMT440 Measuring transducer... -
Page 35: Survey Of Supported Measurements Regarding Connection Mode
● ● ● THD of phase current I2 %THD × ○ ● ○ ● THD of phase current I3 %THD × ○ ● ○ ● ● – supported ○ – calculated × − not supported User's Manual iMT440 Measuring transducer... - Page 36 For 3b and 3u connection mode, only phase to phase voltages are measured. Because of that factor √3 is applied to calculation of quality considering nominal phase voltage. For 4u connection mode measurements support is same as for 1b. User's Manual iMT440 Measuring transducer...
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Page 37: Explanation Of Basic Concepts
Appendix B – Equations with additional descriptions and explanations. PLEASE NOTE Calculation and display of measurements depend on the connection used. For more detailed information see chapter Survey of supported measurements. User's Manual iMT440 Measuring transducer... -
Page 38: Present Values
Q = U × I| +90° With this method, reactive power (energy) represents only true reactive component of apparent power (energy). All measurements are seen via communication. For more detailed information about calculation see chapter Appendix B - Equations. User's Manual iMT440 Measuring transducer... -
Page 39: Power Factor And Power Angle
There are two different methods of calculating reactive energy. See chapter Reactive power and energy calculation. Additional information, how to set and define a counter quantity is explained in chapter ENERGY. User's Manual iMT440 Measuring transducer... -
Page 40: Md Values
Instrument uses measuring technique of true RMS values that assures exact measurements with the presence of high harmonics up to 31st harmonic. Harmonic analysis Power monitoring device iMT440 measures harmonics up to 31 and evaluates the following harmonic parameters: ... -
Page 41: Tehnical Data
I = 20 % … 200 % I 5…500 V 0…400 % Active power 1250 Reactive power 2500 [W/var/VA] [W/var/VA] Apparent power = 1 A = 5 A Active energy Class 1 (EN 62053-21) Reactive energy Class 2 (EN 62053-23) User's Manual iMT440 Measuring transducer... -
Page 42: Inputs
2.5 mm with pin terminal 4 mm solid wire Supply (2) 2.5 mm with pin terminal 4 mm solid wire Modules & Com (8 + 3) 2.5 mm with pin terminal 4 mm solid wire User's Manual iMT440 Measuring transducer... -
Page 43: I/O Modules
–100 … 0 … 100 % output -1 … 0 … 1 V Range 5 -10 … 0 … 10 V Range 6 Other ranges possible by MiQen software Burden current 20 mA External resistance / 20 mA outN User's Manual iMT440 Measuring transducer... -
Page 44: Communication
UAUXU, I inputs: 3320 VACrms U, I inI/O,COM: 3320 VACrms U inI in: 3320 VACrms Directive on electromagnetic compatibility 2014/30/EU Acc. to EN 61326-1 Enclosure material PC/ABS Flammability Acc. to UL 94 V-0 Weight 370 g User's Manual iMT440 Measuring transducer... -
Page 45: Mechanical
-10 … 0 … 45 … 55 °C Acc. to IEC/EN 60 688 Operating temperature -30 to +70 °C Storage temperature -40 to +70 °C 93% r.h. Average annual humidity 2000 m Altitude Dimensions User's Manual iMT440 Measuring transducer... -
Page 46: Connection Table
+ I/O 3 + I/O 4 + / AC (L) Auxiliary power supply – / AC (N) Rx / A Communication RS232 / RS485 GND / NC Tx / B User's Manual iMT440 Measuring transducer... -
Page 47: Appendices
30135 Iavg 30136 30137 Σ I 30138 30139 Active Power Total (Pt) 30140 30141 Active Power Phase L1 (P1) 30142 30143 Active Power Phase L2 (P2) 30144 30145 Active Power Phase L3 (P3) 30146 30147 User's Manual iMT440 Measuring transducer... - Page 48 Energy Counter 4 Exponent 30404 Actual counter value is calculated: Exponent Current Active Tariff 30405 Counter * 10 Energy Counter 1 30406 30407 Energy Counter 2 30408 30409 Energy Counter 3 30410 30411 Energy Counter 4 30412 30413 User's Manual iMT440 Measuring transducer...
- Page 49 Active Power Phase L1 (P1) 30816 Active Power Phase L2 (P2) 30817 Active Power Phase L3 (P3) 30818 Active Power Total (Pt) 30819 Reactive Power Phase L1 (Q1) 30820 Reactive Power Phase L2 (Q2) 30821 User's Manual iMT440 Measuring transducer...
- Page 50 Active Power Total (Pt) - (positive) 30854 Active Power Total (Pt) - (negative) 30855 Reactive Power Total (Qt) - L 30856 Reactive Power Total (Qt) - C 30857 Apparent Power Total (St) 30858 30859 30860 30861 User's Manual iMT440 Measuring transducer...
- Page 51 30085 Iavg 30086 30087 Σ I 30088 30089 Active Power Total (Pt) 30090 30091 Active Power Phase L1 (P1) 30092 30093 Active Power Phase L2 (P2) 30094 30095 Active Power Phase L3 (P3) 30096 30097 User's Manual iMT440 Measuring transducer...
- Page 52 Energy Counter 4 Exponent 30040 Actual counter value is Exponent calculated: Counter * 10 Current Active Tariff 30133 Energy Counter 1 30134 30135 Energy Counter 2 30136 30137 Energy Counter 3 30138 30139 Energy Counter 4 30140 30141 User's Manual iMT440 Measuring transducer...
- Page 53 Active Power Phase L1 (P1) 30816 Active Power Phase L2 (P2) 30817 Active Power Phase L3 (P3) 30818 Active Power Total (Pt) 30819 Reactive Power Phase L1 (Q1) 30820 Reactive Power Phase L2 (Q2) 30821 User's Manual iMT440 Measuring transducer...
- Page 54 Power Factor Total (PFt) 30831 All other MODBUS registers are a subject to change. For the latest MODBUS register definitions go to ISKRA d.o.o.’s web page www.iskra.eu. 100% values calculations for normalized measurements Un = (R40147 / R40146) * R30015 * R40149...
- Page 55 Text: 6 characters (2 characters for 16 bit register) T_Str8 Text: 8 characters (2 characters for 16 bit register) T_Str16 Text: 16 characters (2 characters for 16 bit register) T_Str40 Text: 40 characters (2 characters for 16 bit register) User's Manual iMT440 Measuring transducer...
- Page 56 N − 128 samples in more periods (above 65 Hz) Phase current ∑ = √ N − 128 samples in a period (up to 65 Hz) N − 128 samples in more periods (above 65 Hz) User's Manual iMT440 Measuring transducer...
- Page 57 − total active power φ = [−180°, 179,99°] − total apparent power 3 phase power factor - total active power - total apparent power Power factor by phases - phase active power - phase apparent power User's Manual iMT440 Measuring transducer...
- Page 58 − value of first harmonic 100 THD ( % ) = n − number of harmonic Energy Tarif price exponent Pricein tariff = Price × 10 Total exponent of tariff price and energy price in all tariffs User's Manual iMT440 Measuring transducer...
- Page 59 Published by Iskra, d.o.o. • Subject to change without notice • Version 1.00 July 2021 • EN K22.496.900...
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