Iskra MT440 User Manual
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Iskra MT440 User Manual

Multifunction transducer
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Multifunction Transducer MT440

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Summary of Contents for Iskra MT440

  • Page 1 User’s Manual Multifunction Transducer MT440...

  • Page 3: Table Of Contents

    Table of contents  Table of Contents     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  ...
  • Page 4 Table of contents      TECHNICAL DATA_______________________________________________________ 32   6.1 Applied standards --------------------------------------------------------------------------------- 33   6.2 Accuracy -------------------------------------------------------------------------------------------- 34   6.3 Inputs ----------------------------------------------------------------------------------------------- 35   6.4 Connection ----------------------------------------------------------------------------------------- 35   6.5 I/O modules ---------------------------------------------------------------------------------------- 36   6.6 Communication ------------------------------------------------------------------------------------ 37   6.7 Electronic features -------------------------------------------------------------------------------- 37  ...

  • 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

    Installation and use of a device also includes handling with dangerous currents and voltages and shall be therefore carried out by qualified persons. The Iskra MIS 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 instrument is used for measuring or supervision, please contact a person who is responsible for installation of such system.

  • 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: − Measuring transducer MT440, − label for I/O functionality description, − quick guide. User’s Manual ...

  • Page 8: Basic Description And Operation Of Measuring Transducer

    Basic description and operation of measuring transducer BASIC DESCRIPTION AND OPERATION OF MEASURING TRANSDUCER   2.1 Introduction ----------------------------------------------------------------------------------------- 5   2.2 Glossary --------------------------------------------------------------------------------------------- 6   2.3 Description of the product ------------------------------------------------------------------------ 6   2.4 Purpose and use of measuring transducer ------------------------------------------------------ 7 4  User’s Manual...

  • Page 9: Introduction

    Basic description and operation of measuring transducer 2.1 Introduction Description of symbols In different chapters or tables different symbols may appear in User’s Manual. According to the position of symbols, they have different meaning. Subchapter Symbols next to the subchapters indicate accessibility of functions described. Accessibility of functions is indicated with the following symbols: −...

  • Page 10: Glossary

    Explanation Root Mean Square value MODBUS Industrial protocol for data transmission MiQen Software for Iskra MIS 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 11 Basic description and operation of measuring transducer 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).

  • Page 12: Purpose And Use Of Measuring Transducer

    Basic description and operation of measuring transducer 2.4 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.

  • Page 13: Connection

    Connection CONNECTION   3.1 Introduction ---------------------------------------------------------------------------------------- 10   3.2 Mounting ------------------------------------------------------------------------------------------- 10   3.3 Electric connection -------------------------------------------------------------------------------- 10   3.4 Connection of input/output modules ------------------------------------------------------------ 12   3.5 Communication connection ---------------------------------------------------------------------- 12   3.6 Connection of auxiliary power supply ---------------------------------------------------------- 14 User’s Manual ...

  • Page 14: Introduction

    (connection mode, current and voltage transformers ratio …). 3.2 Mounting MT440 measuring transducer is designed for DIN rail mounting. It should be mounted on a 35 mm DIN rail by means of two plastic fasteners. Before installation fasteners should be in open position (pulled).
  • Page 15 Connection System/ connection Terminal assignment Connection 1b (1W) Single-phase connection Connection 3b (1W3) Three-phase – three-wire connection with balanced load Connection 3u (2W3) Three-phase – three-wire connection with unbalanced load Connection 4b (1W4) Three-phase – four-wire connection with balanced load Connection 4u (3W4) Three-phase –...

  • Page 16: Connection Of Input/Output Modules

    (Example of analog output module as I/O module 1) 3.5 Communication connection MT440 is equipped with one standard (COM1) serial (RS232 or RS485) communication port and one service communication port (USB). Warning! USB communication port is provided with only BASIC insulation and can ONLY be used unconnected to aux.
  • Page 17 Type mini B connector. Note When MT440 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. It is also provided on the CD, enclosed in the original shipment package, or can be downloaded from the Iskra MIS web page www.iskra-mis.si.

  • Page 18: Connection Of Auxiliary Power Supply

    Connection putting to store, mounting the unit on the DIN rail or the unit operates without USB cover the warranty is void. Also unit returned back without USB cover or with clear indications that it was stored or operated without USB cover on the USB port it will be treated as out of the warranty. Survey of communication connections Connector Terminals...

  • Page 19: Settings

    Settings SETTINGS   4.1 Introduction ---------------------------------------------------------------------------------------- 15   4.2 MiQen software ------------------------------------------------------------------------------------ 16   4.3 Setting procedure ---------------------------------------------------------------------------------- 17   4.4 General settings ----------------------------------------------------------------------------------- 17   Description and Location ......................... 17   Average interval ..........................18   Temperature unit ..........................18  ...

  • Page 20: Introduction

    − Standard edition, freeware edition which supports all software functionality except data analysis. For MT440 only standard edition applies since measurement recording and analysis is with MT440 not supported. Devices management Select the instrument in a favorite’s line. Use the network explorer to set and explore the devices network.

  • Page 21: Setting Procedure

    Settings 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 22: Average Interval

    Settings Average interval The averaging interval defines the refresh rate of measurements on communication and remote display. Temperature unit Choose a unit for temperature display. Maximum demand calculation (MD mode) The instrument provides maximum demand values using thermal function. A thermal function assures exponent thermal characteristic based on simulation of bimetal meters.

  • Page 23: Connection

    Settings Reactive power and energy calculation Two different principles of reactive power and energy calculation are used: Standard method: With this method a reactive power and energy are calculated based on assumption that all power (energy) that is not active is reactive. –...

  • Page 24: Communication

    (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 25: Energy

    Settings 4.8 Energy Warning! After modification of energy parameters, the energy meters must be reset otherwise all further energy measurements could be incorrect. Active tariff When active tariff is set, one of the tariffs (up to four) is defined as active. Common energy exponent Common energy exponent defines minimal energy that can be displayed on the energy counter.
  • Page 26 Settings Output parameter Set the measured parameter to be transformed onto the analog output. Output range Defines analog output full-scale ranges: DC current output DC voltage output -1 … 0 … 1 mA -1 … 0 … 1 V -5 … 0 … 5 mA -10 ...

  • Page 27: Fast Analog Output Module

    Settings Output range Defines the shape and up to 5 break points of an analog output. For intrinsic-error for analog outputs with bent or linear zoom characteristic multiply accuracy class with correction factor (c). Correction factor c (the highest value applies): Linear characteristic Bent characteristic ≤...
  • Page 28 Settings Pulse output functionality A corresponding energy counter (up to 4) can be assigned to a pulse output. A number of pulses per energy unit, pulse length, and a tariff in which output is active are set. Warning! Pulse parameters are defined by SIST EN 62053−31 standard. In sub- chapter Calculation of recommended pulse parameters below a simplified rule is described to assist you in setting the pulse output parameters.

  • Page 29: Alarms

    Alarms are used for alarming exceeded set values of the measured quantities. Alarms setting MT440 supports setting up to 16 alarms in two alarm groups. Alarms can be set for any of measured parameters by setting condition and a limit value.

  • Page 30: Measurements

    Measurements MEASUREMENTS   5.1 Introduction ---------------------------------------------------------------------------------------- 27   5.2 Supported measurements ------------------------------------------------------------------------- 27   5.3 Available connections ---------------------------------------------------------------------------- 27   Survey of supported measurements regarding connection mode ............27   5.4 Explanation of basic concepts ------------------------------------------------------------------- 29   Sample factor − M ..........................

  • Page 31: Introduction

    Measurements 5.1 Introduction In the following chapters the device operation is explained more in detail. 5.2 Supported measurements Selection of supported measurements is changed with the connection settings. All supported measurements could be read via communication (MiQen). 5.3 Available connections Different electric connections are described more in detail in chapter Electric connection on page 10.
  • Page 32 Measurements Basic measurements Designat. Unit Apparent power S ● × × ● ● Apparent power S × × × ○ ● Apparent power S × × × ○ ● Total apparent power S ● ● ● ○ ● Power factor PF PF1/ePF1 ●...

  • Page 33: Explanation Of Basic Concepts

    Measurements Note 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. 5.4 Explanation of basic concepts Sample factor −...

  • Page 34: Calculation And Display Of Measurements

    Measurements 5.5 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 chapter Equations on page 53 with additional descriptions and explanations. Note Calculation and display of measurements depend on used connection.

  • Page 35: Power Factor And Power Angle

    Measurements 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 Equations on page 53. Power factor and power angle Power factor is calculated as quotient of active and apparent power for each phase separately (cosϕ...

  • Page 36: Technical Data

    Technical data TECHNICAL DATA   6.1 Applied standards --------------------------------------------------------------------------------- 33   6.2 Accuracy -------------------------------------------------------------------------------------------- 34   6.3 Inputs ----------------------------------------------------------------------------------------------- 35   Voltage input............................35   Current input ............................35   Frequency ............................... 35   Power supply ............................35   6.4 Connection ----------------------------------------------------------------------------------------- 35  ...

  • Page 37: 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 38: Accuracy

    Technical data 6.2 Accuracy Total accuracy (measurements and analog output) according to IEC/EN 60 688 is presented as percentage of range except when it is stated as an absolute value. Measured values Range Accuracy class Rms current (I , Iavg, I Auto (1, 5, 10 A) 0.3 (0.2)* Maximum current...

  • Page 39: Inputs

    Technical data 6.3 Inputs Voltage input Nominal range values 62.5, 125, 250, 500 V Nominal voltage(U 500 V Minimal measurement 2 V sinusoidal Frequency range 50/60, 400 Hz Max. measured value (cont.) 600 V ; 1000 V Max. allowed value 2 × U ;...

  • Page 40: I/O Modules

    Technical data 6.5 I/O modules Electromechanical relay Purpose alarm, pulse, general purpose digital output module output Type Electromechanical Relay switch Rated voltage 48 V AC/DC (+40% max) Max. switching current 1000 mA Contact resistance ≤ 100 mΩ (100 mA, 24V) Pulse Max.

  • Page 41: Communication

    Technical data 6.6 Communication Type RS232 RS485 Type of connection Direct Network Direct Max. connection length 1000 m ≤ 32 Number of bus stations − − Terminals Screw terminals USB-mini basic isolation Insulation Protection class I, 3.3 kV 1 min ACRMS only! Transfer mode Asynchronous...

  • Page 42: Mechanical

    Technical data 6.9 Mechanical Dimensions W100 × H75× D105 mm Max. conductor cross section for 2,5 mm2 with pin terminal terminals 4 mm2 solid wire Vibration withstand 7g, 3 … 100 Hz, 1 oct/min 10 cycles in each of three axes Shock withstand 300g, 8ms pulse 6 shocks in each of three axes...
  • Page 43 Technical data Connection table Function Connection AC current Measuring input: AC voltage I/O 1 I/O 2 Inputs / outputs: I/O 3 I/O 4 + / AC (L) Auxiliary power supply: – / AC (N) Rx / A RS232 / Communication: GND / NC RS485 Tx / B User’s Manual ...

  • Page 44: Appendix A: Modbus Protocol

    Appendix A: Modbus protocol APPENDIX A: MODBUS PROTOCOL   7.1 Modbus communication protocol --------------------------------------------------------------- 41   Modbus ..............................41   VERSION1: ............................41   Register table for the actual measurements ................... 41   Register table for the normalized actual measurements ................ 43   VERSION2: ............................

  • Page 45: Modbus Communication Protocol

    Appendix A: Modbus protocol 7.1 Modbus communication protocol Modbus is enabled via RS232 and RS485 or USB. The response is the same type as the request. Two versions of MODBUS register tables are available: − VERSION 1: Compatibility with advanced family of transducers (MT500) −...
  • Page 46 Appendix A: Modbus protocol MODBUS Parameter Register Type Start Reactive Power Total (Qt) 30148 30149 Reactive Power Phase L1 (Q1) 30150 30151 Reactive Power Phase L2 (Q2) 30152 30153 Reactive Power Phase L3 (Q3) 30154 30155 Apparent Power Total (St) 30156 30157 Apparent Power Phase L1 (S1) 30158 30159 Apparent Power Phase L2 (S2)
  • Page 47 Appendix A: Modbus protocol MODBUS Parameter Register Start Type DEMAND VALUES DYNAMIC DEMAND VALUES Time Into Period (minutes) 30501 30502 30503 30504 30505 30506 30507 Apparent Power Total (St) 30508 30509 Active Power Total (Pt) - (positive) 30510 30511 Active Power Total (Pt) - (negative) 30512 30513 Reactive Power Total (Qt) - L...
  • Page 48 Appendix A: Modbus protocol MODBUS 100% Parameter value Register Type Reactive Power Phase L3 (Q3) 30822 Reactive Power Total (Qt) 30823 Apparent Power Phase L1 (S1) 30824 Apparent Power Phase L2 (S2) 30825 Apparent Power Phase L3 (S3) 30826 Apparent Power Total (St) 30827 Power Factor Phase 1 (PF1) 30828...
  • Page 49 Appendix A: Modbus protocol MODBUS 100% Parameter value Register Type DYNAMIC DEMAND VALUES Active Power Total (Pt) - (positive) 30862 Active Power Total (Pt) - (negative) 30863 Reactive Power Total (Qt) - L 30864 Reactive Power Total (Qt) - C 30865 Apparent Power Total (St) 30866 30867 30868...
  • Page 50 Appendix A: Modbus protocol MODBUS Parameter Register Type Start Reactive Power Total (Qt) 30098 30099 Reactive Power Phase L1 (Q1) 30100 30101 Reactive Power Phase L2 (Q2) 30102 30103 Reactive Power Phase L3 (Q3) 30104 30105 Apparent Power Total (St) 30106 30107 Apparent Power Phase L1 (S1) 30108 30109 Apparent Power Phase L2 (S2)
  • Page 51 Appendix A: Modbus protocol MODBUS Parameter Register Start Type DEMAND VALUES DYNAMIC DEMAND VALUES Time Into Period (minutes) 30174 30175 30176 30177 30178 30179 30180 Apparent Power Total (St) 30181 30182 Active Power Total (Pt) - (positive) 30183 30184 Active Power Total (Pt) - (negative) 30185 30186 Reactive Power Total (Qt) - L...
  • Page 52 Power Factor Total (PFt) 30831 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 100% values calculations for normalized measurements Un = (R40147 / R40146) * R30015 * R40149...
  • Page 53 Appendix A: Modbus protocol MODBUS Parameter Values / Dependencies Register Type Calibration voltage 30015 Calibration current 30017 Register table for the basic settings Register Content Type Ind Values / Dependencies Level 40143 Connection Mode No mode 1b - Single Phase 3b - 3 phase 3 wire balanced 4b - 3 phase 4 wire balanced...
  • Page 54 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...

  • Page 55: Appendix B: Calculations & Equations

    Appendix B: Calculations & equations APPENDIX B: CALCULATIONS & EQUATIONS   8.1 Calculations ---------------------------------------------------------------------------------------- 52   Definitions of symbols .......................... 52   8.2 Equations ------------------------------------------------------------------------------------------- 53   Voltage ..............................53   Current ..............................53   Power ..............................54   THD ............................... 55   Energy..............................55 User’s Manual ...

  • Page 56: Calculations

    Appendix B: Calculations & equations 8.1 Calculations Definitions of symbols Symbol Definition Sample factor 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 57: Equations

    Appendix B: Calculations & equations 8.2 Equations Voltage ∑ Phase voltage N − 128 samples in one period (up to 65 Hz) N − 128 samples in M periods (above 65 Hz) Example: 400 Hz → N = 7 ∑ − Phase-to-phase voltage − phase voltages (U N −...
  • Page 58 Appendix B: Calculations & equations Power Active power by phases ∑ N − a number of samples in a period ⋅ × n − sample number (0 ≤ n ≤ N) f − phase designation Total active power t − total power 1, 2, 3 − phase designation ϕ...
  • Page 59 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 ∑ Phase-to-phase voltage THD − value of first harmonic ⋅ n −...
  • Page 60 Iskra MIS, d. d. Ljubljanska cesta 24a SI-4000 Kranj, Slovenia Phone: 04 237 21 12 Fax: 04 237 21 29 E-mail: info@iskra-mis.si www.iskra-mis.si Printed in Slovenia • Subject to change without notice • Version 1.01 / Sep. 2011 • GB K 22.496.500...

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