user manual selec mfm374
Contents
1. CONVERTER Suggested Terminating resistor 120 ohm 4 watt E C3 CI C3 C3 C3 C3 HAHA i 14 selec Online Page Description There are 4 dedicated keys labelled as VI VAF Use these 4 keys to read meter parameters Simply press these keys to read the parameters Press VI V button the first screen shows v L N Voltage V1 V2 V3 of all three phases nmn 3 c2 C2 Note LED s of the corresponding parameters display will glow automatically Press VI V button the second screen shows y v L L voltage V 1 2 V 2 3 V 3 1 Ur un un KC MFM374 Press VI M button the third screen shows Current 11 12 13 JU LI LI oe nnn 50 LI LI M C nn Note In 30 3 wire system only L L voltage y 1 2 V 2 3 V 3 1 current I 1 2 1 2 3 1 3 1 will be displayed 15 selec Online Page Description MFM374 eub 10 0 n 6000 cnnn MFM374 eS tp CI 5 C2 CI 16 1 Press VAF A button the first screen shows v Voltage L N Current of first phase V1 11 amp Frequency Hz Note In 3 0 3 wire system only L L voltage L L current V 1 2 11 2 amp Frequenc2. Heavy Industries MFM374 is a suitable meter for heavy industries because of its ability to function even in rough conditions Power Transmission and Distribution field Power System Protection Field Industry Automation Large UPS System Note Please read this manual carefully amp completely before installing operating MFM374 Specifications are subject to change as development is a continuous process Introduction SE Lec SALIENT FEATURES gt 3 rows of 4 digits gt Network supported 10 2 wire 20 3 wire 30 3 wire 30 4 wire gt User programmable network selection gt 7 segment red LED display gt Auto manual page scrolling gt User programmable page sequence for page displayed in auto mode gt Measures all electrical parameters True RMS Voltage True RMS Current Active power Reactive power Apparent power Power factor Frequency Active energy Reactive energy amp Apparent energy gt Programmable CT PT primary CT PT secondary gt Memory retention for ten years gt Potential free Pulse output for energy gt 85 to 270V AC auxiliary supply gt RS485 communication MODBUS Protocol Optional gt Protection covering for terminal screws ORDER CODE 1 MFM 374 2 MFM 374 C With communication version 02 Introduction SE Lec Display amp Key description 1 3 lines of seven segment digits in metering area Display parameters such as Voltage 1 Current Power
3. Note 1 User can select PT primary value as per external PT specifications Programmable for all values 2 PT values changes in step of 10 after 9999 and display shows 10 00K and in steps of 100 after 99 99K Slave ID Default Setting 1 Range 1 to 255 Note Slave Id is for communication purpose Each meter on same RS485 network should have different address according to Modbus RTU protocol 2 Optional available in MFM374 C only 24 Configuration SE Lec Baud Rate 5 T Default Setting 9600 b LI d Range 300 600 1200 2400 4800 9600 amp a TALE 19200 OC IN Note The baud rate could be one of the seven JU uu 300 600 1200 2400 4800 9600 amp 19200 Optional available in MFM374 C only Parity Default Setting None Range None Even Odd Note For asynchronous communication user can select any one of three None Even Odd Optional available in MFM374 C only Stop Bit Default Setting 1 Range 1 or2 Note For asynchronous communication user can select any one from 1 or 2 4 Optional available in MFM374 C only 25 Configuration SE Lec Maximum Auto Page Default Setting 19 Range 1 to 19 Note User can select maximum number of pages being displayed on the unit in auto mode Change Page Sequence Pone Default Setting No NU Range No Yes Conf IL Note User can change page seque
4. Note 1A or 5A depends upon the CT secondary 100 to 500V AC L L Programmable for any value CT Primary 04 Introduction selec Serial Communication Optional MODBUS RTU protocol over RS485 Response time 100 ms Independent of baud rate Pulse Output Pulse Output type Opto Isolated Pulse Voltage 24V DC max Pulse Current 100mA max 100 ms 50 ms Temperature Operating temperature O to 50 Storage temperature 20 to 75 Humidity 85 RH Panel mounting 320 gms 05 Introduction selec Parameter Measured Calculated Parameters Measured values Voltage VIN V2N V3N V12 V23 V31 Vavg L N Vavg L L Current AE A Active Power KW kW kW and Total kW Reactive Power kVAr kVAr KVAr and Total kVAr Apparent Power and Total kVA Resolution Table ______ _ 1 For voltage Current Power resolution is automatically adjusted 2 For power factor resolution is 0 001 06 Introduction selec Measurement Accuracy 0 1 for V gt 20V L N Frequency 0 1 for V gt 35V L L Power factor amp Avg Pf Toll free 1800 227 353 Phone 91 22 28471 1882 4039 4200 4039 4202 Email sales selec com 07 Introduction selec Installation Guide Safety Precautions All safety related codifications symbols and instructions that appear in this operating manual or on the equ
5. 2 Conductors must not come in contact with the internal circuitry of the equipment or else it may lead to a safety hazard that may in turn endanger life or cause electrical shock to the operator 3 Circuit breaker or mains switch must be installed between power source and supply terminals to facilitate power or OFF function However this switch or breaker must be installed in a convenient position normally accessible to the operator 4 Before disconnecting the secondary of the external current transformer from the equipment make sure that the current transformer is short circuited to avoid risk of electrical shock and injury CAUTION 1 The equipment shall not be installed in environmental conditions other than those mentioned in this manual 2 The equipment does not have a built in type fuse Installation of external fuse of rating 275V AC 1Amp for electrical circuitry is highly recommended Introduction selec Mechanical Installation For installing the controller 1 Prepare the panel cutout with proper dimensions as shown a hh 99 We 50 91 5 Front mm 5 Side view Panel Cutout 2 Push the meter into the panel cutout Secure the meter in its place by pushing the clamp on the rear side The screws of the pane of the clamp must be in the farthest forward slot 3 For proper sealing tighten the screws evenly with required torque Tightening torque for clamp 0 1Nm h CAU
6. TION The equipment in its installed state must not come in close proximity to any heating sources caustic vapors oils steam or other unwanted process by products EMC Guidelines EMC Guidelines 1 Use proper input power cables with shortest connections and twisted type 2 Layout of connecting cables shall be away from any internal EMI source 12 This device contains no user serviceable parts and requires special equipment and specialized engineers for repair NO WARRANTY ON UNIT DAMAGED DUE TO WRONG INPUT OUTPUT WIRING CONNECTION 10 Introduction selec Terminal Diagram PULSE O P RS485 Wiring guide 3 PHASE 4 WIRE COMMONLY USED WIRING DIAGRAM 3 0 4 wire 3 CT s MFM374 11 Introduction selec Wiring Guide 3 2 4 wire 3 C s 8 3PT s LOAD 1 LL 3 PHASE 3 WIRE WIRING DIAGRAM 30 3 wire 2 5 amp 2 5 LOAD 1 MFM374 12 12 Introduction Wiring Guide 2 PHASE 3 WIRE WIRING DIAGRAM 20 3 wire 2 CT s LL MFM374 LOAD 11 LOAD 11 13 Introduction SE lec Wiring Guide 1 PHASE 2 WIRE COMMONLY USED WIRING DIAGRAM 1 0 2 wire 1 CT LOAD 11 e gt N gt gt N N o LL 7 7 T O N o O COMMUNICATION WIRING DIAGRAM only for MFM374 C Master RS485 RS232 Converter 28888 Part no AC RS485 RS232 01 RS485 to RS232
7. ation Default Setting 1000 Range 0000 to 9998 Note Password needed for getting into configuration menu Only the person who knows the password can do the parameter setting Change Password Default Setting No Range No Yes Note If user want to change default password make selection as Yes and proceed If selection is No then configuration will move on to the network selection page New Password Default Setting 0000 Range 0000 To 9998 Note After selecting Yes on previous page user can set new password Use A or V keys for increasing or decreasing parameters value Configuration Network Selection Default Setting 3P4W Range 3P3W and 3P4W Note For 10 2 wire 20 3 wire connection the network selection should be set to 3P4W and user can make the requisite hardwired connection at the terminals 1 CT Secondary Default Setting 5 Range 1A or 5A Note User can select from 1A and 5A as per external CT specification CT Primary Default Setting 5 Range 1A 5A to 10 000A 10 0 kA Note As per CT secondary selection CT primary will be 1A to 10000A or 5A to 10000A Programmable for all values Configuration selec PT Secondary Default Setting 350V Range 100V to 500V Note User can select from 100 to 500V as per external PT specification Programmable for all values PT Primary Default Setting 350V Range 100V to 500kV
8. ecting Yes User should note the reading before resetting Reset Apparent Energy Default Setting No Selection No Yes Note User can reset energy by selecting Yes User should note the reading before resetting After pressing enter key configuration will move on to change password page 28 Application selec _ Application of Pulse Output e Process Integration e Energy Controller Pulse output from MFM374 meter can be interfaced into a process through a PLC for on line control of energy content in the process If the PLC has a self excited 24V digital input external 24V DC supply is not needed The kWh pulse is also used to derive average kWh information at the PLC Pulse output from MFM374 meter can be used as alarm generator or total energy controller by interfacing it with presettable counter and control circuits Contactors Relay Trip Circuit The counter is loaded with the maximum energy consumption When count reaches setpoint it provides output to control circuit to take appropriate action To Control Circuit 29 Modbus parameter selec MODBUS register addresses list Readable parameters from MFM374 30 Length Register Data Structure Float Float Float Float Float Float Float Float Float Float Float Float Float Float Float Float Float Float Float Float Float Float Float 22 Float 22 Floa
9. factor Power amp Frequency Energy 2 Unit PF Hz KW Indicates unit of parameter displayed Voltage V Active Power KW MW Apparent power kVA MVA Active energy kWh MWh Apparent energy kVAh MVAh Current A Reactive power kVAr MVAr Frequency Hz Reactive energy kVArh MVArh 3 Keypad keypad with four dual function keys HMI or Programming 4 Display Bright red LED display for best vision 5 Phase 1 2 3 1 2 2 3 3 1 Display phase to neutral or phase to phase values 03 Introduction selec Technical Overview Functional Descriptions Display 7 segment bright red LED display gt 3 lines 4 digits per line to show electrical parameters LED Indications LED indication for all electrical parameter such as V I PF Hz kW kVA KVAr kWh kVAh kVArh kilo M mega avg tot L1 L2 L3 Display update time 1 sec for all parameters Display Scrolling Auto Manual Online Pages Customized page selection from available standard pages selection via configuration menu Input Point Electrical Specification Electrical input type 1 O 2 wire 2 0 3 wire 3 0 3 wire 2 4 wire Rated input voltage 11 to 300V AC max phase to neutral 9 19 to 519V max phase to phase Nominal 5A AC 11mA minimum Rated 6 max External is advised to connect Frequency range 45 to 65 Hz or 5A to 10 000A Programmable for any value
10. here are 8 digit for energy Il be displayed in 2 rows 4 digits in Isb on middle row amp msb on top row gy accumulated is 12345 6 top row will middle row will display 345 6 Content Operating 1009 MFM374 Ver1 OP300 V01 Selec Controls Pvt Ltd India Tel 91 22 28471882 4039 4200 4039 4202 Tollfree 1800 227 353 Fax 91 22 28471733 Website www selec com mail sales selec com
11. ine voltages and their average values are measured and displayed on MFM374 2 CURRENT True RMS value of three phase currents and their average are measured and displayed in MFM374 There is also Bar graph presentation for current in percentage form 3 POWER FACTOR Individual and average power factor displayed on MFM384 4 ACTIVE POWER P Three phase active power and system total active power are measured and displayed on MFM374 5 REACTIVE POWER Q Three phase reactive power and total reactive power of the system are measured and displayed on MFM374 6 APPARENT POWER S Three phase apparent power and total apparent power of the system are measured and displayed on MFM374 7 FREQUENCY The frequency of available voltage input is measured as system frequency 8 ENERGY kWh kVArh kVAh Total Active Reactive and Apparent energy of the system is measured and displayed on MFM 374 9 PULSE O P DC pulse output is generated by the MFM374 which can be used to interface MFM384 with SCADA systems 38 Configuration Record Sheet selec mm Password tooo Change Password _ ____ ____ NewPassword T Secondary CS fo ow x PTSecondayy ____ 5 ___ x Pn ____ _ Change Page Sequence _ Ww Page sequence2 en qq Pagesequences _ a Pagesequence7 _ ______ 39 Configu
12. ipment must be strictly followed to ensure the safety of the operating personnel as well as the instrument If the equipment is not handled in a manner specified by the manufacturer it might impair the protection provided by the equipment CAUTION Read complete instructions prior to installation and operation of the unit Ab CAUTION Risk of electric shock WIRING GUIDELINES WARNING 1 To prevent the risk of electric shock power supply to the equipment must be kept OFF while doing the wiring arrangement 2 Wiring shall be done strictly according to the terminal layout Confirm that all connections are correct 3 Use lugged terminals 4 To eliminate electromagnetic interference use of wires with adequate ratings and twists of the same in equal size shall be made 5 Cable used for connection to power source must have a cross section of 1 5mm These wires shallhave current carrying capacity of 6A 6 The following safety earth symbol is used in this manual D Introduction selec 1 The equipment should be cleaned regularly to avoid blockage of ventilating parts 2 Clean the equipment with a clean soft cloth Do not use Isopropyl alcohol or any other cleaning agent Installation Guidelines CAUTION 1 This equipment being built in type normally becomes a part of main control panel and in such case the terminals do not remain accessible to the end user after installation and internal wiring
13. kW1 kW2 kW3 Note In 30 3 wire system only Total kW kVA kVAr will be displayed Press P lt button the third screen shows v Reactive Power of all three phases KVAr1 kVAr2 kVAr3 Note In 30 3 wire system only Total kW kVA kVAr will be displayed Press lt button the fourth screen shows v Apparent Power of all three phases kVA1 kVA2 kVA3 Note In 30 3 wire system only Total kW kVA kVAr will be displayed Online Page Description ww Press button the fifth screen shows e N N Active reactive apparent power kW1 w kVAr1 kVA1 of first phase 01010101 2 LILI LI 1900 Note 30 3 wire system only Total kW kVA will be displayed Press button the sixth screen shows v Active reactive apparent power kW2 kVAr2 kVA2 of second phase me var u LI Note In 3 2 3 wire system only Total kW kVA kVAr will be displayed Press P lt button the seventh screen shows NG E v Active reactive apparent power kW3 w kVAr3 kVA3 of third phase ANAN Ll 3 800 UL Note 2 3 wire system only Total kW kVA KVAr will be displayed selec Configuration MFM374 a 1 H I LI 2 Password for entering into configur
14. nce by selecting Yes If option selected is No the configuration will move to factory default page Page Sequence Note Page sequence depends on maximum page selection User will be prompted to change page sequence depending upon maximum page selection defined 26 Configuration SE lec PASS 9 OI d mins Factory Default Default Setting No Range Yes Note If Yes selected unit will be formatted to factory default settings User should note all previous settings before formatting the unit Reset Default Setting No Range No Yes Note For resetting energy parameters user has to select Yes option If option selected is No the configuration will move to change password 1 Password Default Setting 1001 Selection 0000 To 9999 Note For resetting energy parameters user will be prompted the password If correct password is entered the user will be able to reset all energy parameters This password will be a value which will be greater than the configuration password by 1 27 Configuration SE lec Reset Active Energy Default Setting No Selection No Yes Note User can reset energy by selecting Yes User should note the reading before resetting Reset Reactive Energy Default Setting No Selection No Yes Note User can reset energy by sel
15. ration Record Sheet selec Sag 12 9 9 _____ _ 2 1 xo TB Pagesequencet 12110120 Le 2 1 mg ME m O 1 pou D 175 _ pones Eh BEE BE 40 SE lec Configuration Online Page Description button the eighth screen shows selec Press E 4 tive reactive apparent v Total Total kW kVAr kVA Note 1 T Energy wil 3 wire system only Total kW displayed display 12 Press VI button the first screen shows between tive energy Total kWh Note By In auto m here are 8 digit for energy the rate ol Il be displayed in 2 rows 4 digits in In auto m Isb on iue i row temporaril gy accumulated is 6 top row wi elevant t amp middle row will display 345 6 n key is pre Configuration There are 4 dedicated keys labelled as VI the configuration menu change setting Note The settings should be done by a pr manual and having understood the applica For the configuration setting mode e Use M keys for sec to enter or e Use A or V keys for increasing or decre e Use key to go back to previous page e Use 44 key to save the setting and mov button the second screen shows active energy Total kVArh
16. selec Creating Best Value 74 Multifunction Meter OPERATING INSTRUCTIONS Operating 1009 MFM374 Ver1 01 1 INTRODUCTION 1 1 About AA rennet 01 ANAN 02 1 3 Technical 04 S acuit AA AA 08 nee 11 2 HUMAN MACHINE INTERFACE 2 1 1 1 15 3 CONFIGURATION aa 21 4 65 29 5 COMMUNICATION 5 1 Modbus Parameter nee 30 6 USER GUIDE aaa 38 7 CONFIG RECORD SHEET nana i 39 Note selec 01 Introduction ABOUT MFM374 A suitable meter for the measurement of parameters such as voltage current power factor frequency power and energy Features such as pulse output communication are available thereby providing a complete solution for many measurement needs APPLICATIONS Electric Automation SCADA System MFM374 can be used as Remote Terminal Unit for monitoring purpose SCADA System All measured data is available through RS485 communication ports with the Modbus Protocol Energy Management System Building Management System MFM374 can be used to monitor power and energy parameters of an organizations which can be transmitted to main control room through RS485
17. t 2 22 Float 2 Float 2 Float 22 Float 2 Float 2 Float 2 Float 2 Foto 22 Float 2 Foto 22 Float 2 Float 2 Fo 22 Float 2 Float 22 Float 22 LS 2 Float 22 Float 2 Float 31 Modbus parameter selec MODBUS register addresses list continued Readable parameters from MFM384 40001 N W selection 40002 CT Secondary 40003 CT primary CT Secondary 5 40004 PT Secondary 40005 PT primary 32 Length Register Structure Length Data cote k 2 Te 33 Modbus parameter selec MODBUS register addresses list continued Readable parameters from MFM374 40007 Slave Id EL TE 1 1 40013 Reset 40014 Reset kVArh 34 Modbus parameter selec emo von Te E mms NEN CUT CT CT NEN mE E 122 www 1 2 CE TT TT Meaning a i roger _ 1 Reset Total Reactive Energy 35 wa se G 1 1 1 1 1 1 Modbus parameter selec MODBUS register addresses list continued Readable parameters from MFM374 40015 Auto Mode Pgs 40016 Page Address Sequence 36 Modbus parameter selec om Ue wens 37 User Guide selec Description of Parameter amp Symbols 1 VOLTAGE True RMS value of three phase voltage three line to l
18. y Hz will be displayed 1 Press VAF A button the second screen shows v Voltage L N Current of second phase V2 12 amp Frequency Hz Note In 0 3 wire system only L L voltage L L current V 2 3 2 3 amp Frequency Hz will be displayed Press VAF A button the third screen shows v Voltage L N Current of third phase 13 amp Frequency Hz Note In 3 0 3 wire system only L L voltage L L current V 1 3 11 3 amp Frequency Hz will be displayed selec Online Page Description MFM374 Press A button fourth screen shows Jun n v Average Voltage L N Current of three i e conn phase V wa lave amp Frequency Hz ut nnn Note In 30 3 wire system only AVG L L voltage le 114111 AVG L L current amp power factor will be displayed Press VAF A button the fifth screen shows U IC v Average Voltage L L Current of three 1134 phase V we live amp power factor f 000 Press lt button the first screen shows Power factor of all three phases PF1 PF2 Note In 3 0 3 wire system only AVG power factor will be displayed C3 C3 C2 17 selec Online Page Description MFM374 200 200 1200 Press P button the second screen shows Active Power of all three phases
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