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Summary of Contents for Iskra MT416
- Page 1 Programmable AC Voltage Transducer MT416 Programmable AC Current Transducer MT418 March 2019 • Version 2.00...
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Page 2: Table Of Contents
Table of contents Table of Contents 1. SECURITY ADVICE AND WARNINGS ________________________________________ 1 1.1 Welcome --------------------------------------------------------------------------------------------- 2 1.2 Introduction ----------------------------------------------------------------------------------------- 2 1.3 Health and safety ----------------------------------------------------------------------------------- 2 1.4 Safety warnings and instructions for use -------------------------------------------------------- 2 1.5 Warnings, information and notes regarding designation of the product ------------------- 3 2. - Page 3 Kazalo 6.12 Dimensions --------------------------------------------------------------------------------------- 28 7. APPENDIX A: MODBUS PROTOCOL _______________________________________ 29 7.1 Modbus communication protocol --------------------------------------------------------------- 30 8. APPENDIX B: CALCULATIONS & EQUATIONS ______________________________ 33 8.1 Calculations ---------------------------------------------------------------------------------------- 34 8.2 Equations ------------------------------------------------------------------------------------------- 34 User’s Manul...
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Page 5: Security Advice And Warnings
Security advice and warnings SECURITY ADVICE AND WARNINGS 1.1 Welcome --------------------------------------------------------------------------------------------- 2 1.2 Introduction ----------------------------------------------------------------------------------------- 2 1.3 Health and safety ----------------------------------------------------------------------------------- 2 1.4 Safety warnings and instructions for use -------------------------------------------------------- 2 1.5 Warnings, information and notes regarding designation of the product ------------------- 3 User’s Manual... -
Page 6: Welcome
MT416/418. Installation and use of devices also includes handling with dangerous currents and voltages and shall therefore be carried out by qualified persons. The Iskra MIS Company assumes no responsibility in connection with installation and use of the product. If... -
Page 7: Warnings, Information And Notes Regarding Designation Of The Product
Compliance of the product with European CE directives. Contents of consignment The consignment includes: − Programmable AC measuring transducer MT416/418 − Quick guide. User’s Manul... -
Page 8: Basic Description And Operation Of Programmable Ac Measuring Transducer
Basic description and operation of measuring transducer BASIC DESCRIPTION AND OPERATION OF PROGRAMMABLE AC MEASURING TRANSDUCER 2.1 Introduction ----------------------------------------------------------------------------------------- 5 2.2 Glossary --------------------------------------------------------------------------------------------- 5 2.3 Description of the product ------------------------------------------------------------------------ 6 2.4 Purpose and use of programmable AC measuring transducer ------------------------------- 6 User’s Manual... -
Page 9: Introduction
Basic description and operation of measuring transducer 2.1 Introduction MT416 and MT418 are programmable AC voltage / current transducers with minimal differences in functionality. Where there are some characteristic features that denote MT416 or MT418 symbol next to data. Subchapter Symbols next to the subchapters indicate accessibility of functions described. -
Page 10: Description Of The Product
VDC; 40 VAC – 276 VAC) or Transformer (110, 230 VAC), which should be chosen at placing the order. Voltage input (MT416) Voltage input is connected to measuring circuit through measuring voltage transformer (500k). Maximum value of input voltage is 600 V Current input (MT418) Current input is connected to measuring circuit through current transformer (0.01). -
Page 11: Purpose And Use Of Programmable Ac Measuring Transducer
2.4 Purpose and use of programmable AC measuring transducer Programmable AC Voltage transducer MT416 MT416 is intended for measuring and monitoring single-phase voltage or frequency. Voltage input is electrically insulated from the system by means of voltage transformer. It measures RMS voltage value by means of fast sampling of voltage signals, which makes instruments suitable for acquisition of transient events. -
Page 12: Connection
Connection CONNECTION 3.1 Introduction ----------------------------------------------------------------------------------------- 9 3.2 Mounting -------------------------------------------------------------------------------------------- 9 3.3 Electric connection --------------------------------------------------------------------------------- 9 3.4 Communication connection ---------------------------------------------------------------------- 10 3.5 Connection of auxiliary power supply ---------------------------------------------------------- 11 User’s Manual... -
Page 13: Introduction
Both the use and connection of the device includes handling with dangerous currents and voltages. Only a qualified person shall therefore perform connection. Iskra MIS 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 14: Communication Connection
USB connector is placed on the bottom of the MT416/418, behind removable cap. After installation it is not accessible any more. When connected, MT416/418 is powered by USB port. Connect a communication line by means of a corresponding terminal. Corresponding data are stated on the instrument label, regarding the selected communication. -
Page 15: Connection Of Auxiliary Power Supply
RS485 communication is intended for connection of devices to network where several instruments with RS485 communication are connected to a common communication interface. We recommend the use of Iskra MIS communication interfaces for best compatibility! Check the sticker on top of the instrument for correct connection of terminals. - Page 16 Connection Warning! For safety purposes it is important that both wires are firmly connected. They should be connected only to the designated terminals as shown on the label above as well as on the front foil. Function Connection I MT 418 AC current Measuring input:...
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Page 17: Settings
Settings SETTINGS 4.1 Introduction ---------------------------------------------------------------------------------------- 14 4.2 MiQen software ------------------------------------------------------------------------------------ 14 4.3 Setting procedure ---------------------------------------------------------------------------------- 15 4.4 General settings ----------------------------------------------------------------------------------- 15 Description and Location ......................15 Average interval ........................... 15 Maximum demand calculation (MD mode), (MT418) ..............16 4.5 Serial communication ----------------------------------------------------------------------------- 16 Communication parameters ...................... -
Page 18: Introduction
Settings 4.1 Introduction Instrument settings can be remotely modified with communication (COM1 and/or USB if available) and MiQen software when connected to a PC. 4.2 MiQen software MiQen is a software tool for complete monitoring of measuring instruments, connected to a PC via serial or USB communication. -
Page 19: Setting Procedure
Settings MiQen user interface Note You can download freeware MiQen (standard edition) from: www.iskra- mis.si 4.3 Setting procedure In order to modify instrument settings with MiQen, current parameters must be loaded first. Instrument settings can be acquired via a communication link (serial or USB) or can be loaded off-line from a file on a local disk. -
Page 20: Serial Communication
Settings Maximum demand calculation (MD mode), (MT418) The instrument provides maximum demand values from a thermal function demand values. A thermal function assures exponent thermal characteristic based on simulation of bimetal meters. Maximal values and time of their occurrence are stored in device. A time constant (t. c.) can be set from 1 to 255 minutes and is 6 −... -
Page 21: Security
(depending on a serial number of the meter). The BP password is available in the user support department in ISKRA MIS, and is entered instead of the password PL1 or/and PL2. Do not forget to state the meter serial meter when contacting the personnel in Iskra MIS. -
Page 22: Analogue Output
Settings 4.7 Analogue output Output is fully programmable and can be set to any of 6 ranges. Output parameter Set the measured parameter to be transformed onto the analogue output. Output range Defines analogue output full-scale ranges: DC current output DC voltage output 0 …... -
Page 23: Reset Maximal Md Values (Mt418)
Settings Example of settings with linear and bent characteristic: Average interval for analogue output Defines the average interval for measurements on the analogue output. Available settings are from 1 period (0.02 sec at 50Hz) up to 256 periods (5.12 sec at 50Hz). Reset maximal MD values (MT418), Current and stored MDs are reset. -
Page 24: Measurements
Measurements MEASUREMENTS 5.1 Introduction ---------------------------------------------------------------------------------------- 21 5.2 Explanation of basic concepts ------------------------------------------------------------------- 21 Sample factor − M ........................... 21 Average interval − M ........................21 5.3 Calculation and display of measurements ----------------------------------------------------- 21 5.4 Present values ------------------------------------------------------------------------------------- 21 Voltage ............................21 Current ............................ -
Page 25: Introduction
Measurements 5.1 Introduction In the following chapters the device’s operation is explained more in detail. 5.2 Explanation of basic concepts Sample factor − M A meter measures all primary quantities with the sample frequency of 6.991 kHz. The minimum of 107 samples must be in the calculation period. Based on these limitations (65Hz·107 samples) a sample factor is calculated. -
Page 26: Technical Data
Technical data TECHNICAL DATA 6.1 Applied standards --------------------------------------------------------------------------------- 23 6.2 Accuracy -------------------------------------------------------------------------------------------- 24 6.3 Inputs ----------------------------------------------------------------------------------------------- 25 Voltage input ............................. 25 Current input ............................. 25 Frequency ............................25 Power supply ............................. 25 6.4 Connection ----------------------------------------------------------------------------------------- 25 Permitted conductor cross-sections ....................25 6.5 Analogue output ----------------------------------------------------------------------------------- 26 General .............................. -
Page 27: Applied Standards
Technical data 6.1 Applied standards EN 61010-1: 2001, Safety requirements for electrical equipment for measurement, control and laboratory use Part 1: General requirements EN 60688:1992 Electrical measuring transducers for converting a.c. electrical quantities to analogue or digital signals EN 60688:1995 / A1: 1999 Electrical measuring transducers for converting a.c. electrical quantities to analogue or digital signals EN 60688:1995 / A2: 2001 Electrical measuring transducers for converting a.c. -
Page 28: Accuracy
0.5 (0.2) MT418 Maximum current 12 A 0.5 (0.2) MT418 Rms voltage U 62.5, 125, 250, 500 V 0.5 (0.2) MT416 Maximum voltage 600 V 0.5 (0.2) MT416 Frequency (f) − actual 50 / 60Hz 0.02 16 … 400 Hz Nominal frequency range 0.02... -
Page 29: Inputs
Technical data 6.3 Inputs Voltage input Nominal values 62.5, 125, 250, 500 V Rated voltage (U 500 V 1.2 × U permanently, 2 × U Max. allowed value Minimal measurement 10 mV sinusoidal Maximal measurement 600 V Input impedance 500 k Consumption /500k... -
Page 30: Analogue Output
Technical data 6.5 Analogue output General Linearization Linear, Quadratic No. of break points Output value limits + 120 % of nominal output Response time Input output < 100 ms Response time – Fast Input output < 50 ms Residual ripple <... -
Page 31: Electronic Features
Technical data 6.7 Electronic features Response time Input communication All calculations are averaged over an interval of between 8 to 256 periods. Preset interval is 64 periods, which is 1.28 second at 50 Hz. Average interval below 64 periods may result to unstable measurements, depended on measuring signal. -
Page 32: Reference Conditions
Technical data 6.11 Reference conditions 0 .. 45 °C Ambient temperature 93% r.h. Relative humidity 57.7…500V Voltage input 0.31…5A Current input 45…65Hz Frequency Waveform Sinus 6.12 Dimensions Construction Appearance Programmable AC measuring transducers MT416/418 User’s Manual... -
Page 33: Appendix A: Modbus Protocol
Appendix A: Modbus protocol APPENDIX A: MODBUS PROTOCOL 7.1 Modbus communication protocol --------------------------------------------------------------- 30 Modbus .............................. 30 VERSION1: ............................30 Register table for the actual measurements ..................30 VERSION2: ............................31 Register table for the actual measurements ..................31 Data types decoding .......................... 32 User’s Manual... -
Page 34: Modbus Communication Protocol
The memory reference for input and holding registers is 30000 and 40000 respectively. VERSION1: Register table for the actual measurements MODBUS Parameter Register Type Start Frequency 30105 30106 30107 30108 MT416 30126 30127 MT418 THD HARMONIC DATA U1 THD% 30182 MT416 I1 THD% 30188 MT418 Internal Temperature 30181... - Page 35 DEMAND VALUES DYNAMIC DEMAND VALUES 30175 30176 MT418 MAX DEMAND SINCE LAST RESET 30207 30208 MT418 All other MODBUS registers are a subject to change. For the latest MODBUS register definitions go to ISKRA MIS’s web page www.iskra-mis.si User’s Manul...
- Page 36 Appendix A: Modbus protocol Data types decoding 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 CD 15(16) Short Unsigned float (16 bit) bits # 15…14 Decade Exponent(Unsigned 2 bit) bits # 13…00...
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Page 37: Appendix B: Calculations & Equations
Appendix B: Calculations & Equations APPENDIX B: CALCULATIONS & EQUATIONS 8.1 Calculations ---------------------------------------------------------------------------------------- 34 Definitions of symbols........................34 8.2 Equations ------------------------------------------------------------------------------------------- 34 Voltage .............................. 34 Current .............................. 34 THD ..............................35 User’s Manual... -
Page 38: Calculations
Appendix B: Calculations & Equations 8.1 Calculations Definitions of symbols Symbol Definition Sample factor Average interval Phase voltage Total number of samples in a period Sample number (0 ≤ n ≤ N) Current sample n Phase voltage sample n 8.2 Equations Voltage ... - Page 39 Appendix B: Calculations & Equations Current THD − value of first harmonic n − number of harmonic Phase voltage THD − value of first harmonic n − number of harmonic User’s Manul...
- Page 40 Published by Iskra, d.o.o. • Subject to change without notice • Version 2.00 / March 2019 • GB K22.496.501...
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