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Introduction

3 PHASE 4-WIRE (COMMONLY USED) WIRING DIAGRAM
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4 wire, 3 CT’s  

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Wiring guide

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Terminal Diagram

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PULSE O/P

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selec

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RS485

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Summary of Contents for MFM374

Page 1: ...MFM374 Multifunction Meter OPERATING INSTRUCTIONS Operating 1009 MFM374 Ver1 OP300 V01 selec Creating Best Value ...

Page 2: ...1 1 2 Overview 02 1 3 Technical Overview 04 1 4 Installation Guide 08 1 5 Wiring Guide 11 2 HUMAN MACHINE INTERFACE HMI 15 3 CONFIGURATION 21 4 APPLICATIONS 29 5 COMMUNICATION 5 1 Modbus Parameter 30 6 USER GUIDE 38 7 CONFIG RECORD SHEET 39 ...

Page 3: ...Note selec 01 ...

Page 4: ...85 communication ports with the Modbus Protocol 2 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 3 Heavy Industries MFM374 is a suitable meter for heavy industries because of its ability to function even in rough conditions 4 Power Transmission and Distribu...

Page 5: ...cal parameters True RMS Voltage True RMS Current Active power Reactive power Apparent power Power factor Frequency Active energy Reactive energy Apparent energy Ø Programmable CT PT primary CT PT secondary Ø Memory retention for ten years Ø Potential free Pulse output for energy Ø 85 to 270V AC auxiliary supply Ø RS485 communication MODBUS Protocol Optional Ø Protection covering for terminal screw...

Page 6: ...arameter displayed Overview Voltage V kV Current A kA Active Power kW MW Reactive power kVAr MVAr Apparent power kVA MVA Frequency Hz Active energy kWh MWh Reactive energy kVArh MVArh Apparent energy kVAh MVAh 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 s...

Page 7: ...to neutral 19 to 519V AC max phase to phase Nominal 5A AC 11mA minimum 6A max External CT is advised to connect 1A or 5A to 10 000A Programmable for any value Note 1A or 5A depends upon the CT secondary Customized page selection from available standard pages selection via configuration menu Introduction 04 Description Display update time MFM374 Display LED Indications Functional Descriptions Techn...

Page 8: ...C DC Opto Isolated 50 60Hz 24V DC max 100mA max 100 ms 50 ms 0 5 VA max 5A per phase o Operating temperature 0 to 50 C o Storage temperature 20 to 75 C 85 RH Panel mounting 320 gms Communication address Transmission mode Data types Transmission distance Transmission speed Parity Stop bits Response time 1 to 255 Half duplex Float and Integer 500 m maximum 300 600 1200 2400 4800 9600 19200 in bps No...

Page 9: ...djusted 2 For power factor resolution is 0 001 Frequency of available phase Total of all phases Total of all phases Total of all phases kWh Pulse 0 01K 0 1K 1K 0 01M 0 1M 1M 0 01K 0 1K 1K 0 01M 0 1M 1M Introduction 06 Parameter Measured Calculated Parameters Voltage I I I I 1 2 3 AVG Current Apparent Power Power Factor Active Power Frequency Reactive Power Active Energy Reactive Energy Apparent En...

Page 10: ...nt Average Voltage L N Average Voltage L L Reactive Power Toll free 1800 227 353 Phone 91 22 28471 1882 4039 4200 4039 4202 Email sales selec com Accuracy 07 selec Accuracy 0 01 PF Class 1 Class 1 Class 1 Class 1 Class 1 Class 1 0 5 of F S 1 digit 0 5 of F S 1 digit 0 5 of F S 1 digit 0 5 of F S 1 digit 0 5 of F S 1 digit 0 5 of F S 1 digit 0 1 for V 20V L N 0 1 for V 35V L L ...

Page 11: ...isk 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...

Page 12: ...se electrical shock to the operator 3 Circuit breaker or mains switch must be installed between power source and supply terminals to facilitate power ON 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 tr...

Page 13: ...crews 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 CAUTION 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 This device contains no user serviceable parts and requires speci...

Page 14: ...ED WIRING DIAGRAM 3 Ø 4 wire 3 CT s S2 S1 S2 S1 S2 S1 N L N PULSE O P RS485 V2 V3 L N Wiring guide I1 I2 I3 V1 MFM374 Terminal Diagram S2 S1 S2 S1 S2 S1 N I1 L1 L2 L3 I2 I3 PULSE O P L N 11 selec LOAD LINE L1 L2 L3 N N V1 L O A D V2 V3 RS485 ...

Page 15: ... 3 CT s 3 PT s S2 S1 S2 S1 S2 S1 N L N PULSE O P RS485 LOAD LINE L1 L2 L3 N L N 3 PHASE 3 WIRE WIRING DIAGRAM 3 Ø 3 wire 2 CT s 2 PT s S2 S1 S2 S1 S2 S1 V1 N L N PULSE O P RS485 V2 V3 LOAD LINE L1 L2 L3 L N I1 I2 I3 V1 V2 V3 I1 I2 I3 MFM374 MFM374 ...

Page 16: ... S2 S1 S2 S1 V1 N L N PULSE O P RS485 V2 V3 LOAD LINE L1 L2 N L N 2 Ø 3 wire 2 CT s 2 PT s I1 I2 I3 S2 S1 S2 S1 S2 S1 V1 N L N PULSE O P RS485 V2 V3 LOAD LINE L1 L2 N L N I1 I2 I3 MFM374 MFM374 2 PHASE 3 WIRE WIRING DIAGRAM 2 Ø 3 wire 2 CT s ...

Page 17: ...5 RS232 01 S2 S1 S2 S1 S2 S1 V1 N L N PULSE O P RS485 V2 V3 LOAD LINE L1 N L N 1 PHASE 2 WIRE COMMONLY USED WIRING DIAGRAM 1 Ø 2 wire 1 CT I1 I2 I3 MFM374 MFM374 VI A M VAF P E PRG K M L1 L2 L3 AVG TOT VAr VArh VL N VL L Hz PF A W Wh VA VAh MFM374 VI A M VAF P E PRG K M L1 L2 L3 AVG TOT VAr VArh VL N VL L Hz PF A W Wh VA VAh MFM374 VI A M VAF P E PRG K M L1 L2 L3 AVG TOT VAr VArh VL N VL L Hz PF A...

Page 18: ... V 2 3 V 3 1 X3 Press VI button the third screen shows Current I1 I2 I3 Note In 3Ø 3 wire system only L L voltage V 1 2 V 2 3 V 3 1 current I 1 2 I 2 3 I 3 1 will be displayed 01 Press VI button the first screen shows L N Voltage V1 V2 V3 of all three phases Note LED s of the corresponding parameters on display will glow automatically MFM374 VI A M VAF P E PRG K M L1 L2 L3 AVG TOT VAr VArh VL N VL...

Page 19: ...en shows Voltage L N Current of first phase V1 I1 Frequency Hz Note In 3 Ø 3 wire system only L L voltage L L current V 1 2 I 1 2 Frequency Hz will be displayed Press VAF button the second screen shows Voltage L N Current of second phase V2 I2 Frequency Hz Note In 3 Ø 3 wire system only L L voltage L L current V 2 3 I 2 3 Frequency Hz will be displayed Press VAF button the third screen shows Volta...

Page 20: ...z PF A W Wh VA VAh Press VAF button the fourth screen shows Average Voltage L N Current of three phase V I Frequency Hz AVG AVG Note In 3Ø 3 wire system only AVG L L voltage AVG L L current power factor will be displayed Press VAF button the fifth screen shows Average Voltage L L Current of three phase V I power factor AVG AVG Press P button the first screen shows Power factor of all three phases ...

Page 21: ...ton the second screen shows Active Power of all three phases kW1 kW2 kW3 kW kVA kVAr Note In 3Ø 3 wire system only Total will be displayed Press P button the third screen shows Reactive Power of all three phases kVAr1 kVAr2 kVAr3 kW kVA kVAr Note In 3Ø 3 wire system only Total will be displayed Press P button the fourth screen shows Apparent Power of all three phases kVA1 kVA2 kVA3 kW kVA kVAr Not...

Page 22: ...on the sixth screen shows Active reactive apparent power kW2 kVAr2 kVA2 of second phase kW kVA kVAr Note In 3 Ø 3 wire system only Total will be displayed Press P button the seventh screen shows Active reactive apparent power kW3 kVAr3 kVA3 of third phase kW kVA kVAr Note In 3 Ø 3 wire system only Total will be displayed K M L1 L2 L3 AVG TOT VAr VArh VL N VL L Hz PF A W Wh VA VAh K M L1 L2 L3 AVG ...

Page 23: ...nt 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 or keys for increasing or decreasing parameters value K M L1 L2 L3 AVG TOT MFM374 E MFM374 E K M L1 L2 L3 AVG TOT VL N VL L Hz PF ...

Page 24: ...xternal CT specification Network Selection Default Setting 3P4W Range 3P3W and 3P4W Note For 1Ø 2 wire 2Ø 3 wire connection the network selection should be set to 3P4W and user can make the requisite hardwired connection at the terminals MFM374 VI A M VAF P E PRG 06 K M L1 L2 L3 AVG TOT VL N VL L Hz PF A W Wh VAr VArh VA VAh CT Primary Default Setting 5 A Range 1A 5A to 10 000A 10 0 kA Note As per...

Page 25: ... PT specification Programmable for all values 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 Optional available in MFM374 C only 24 MFM374 VI A M VAF P E PRG 07 08 MFM374 VI A M VAF P E PRG K M L1 L2 L3 AVG TOT VL N VL L Hz PF A W Wh VAr VArh VA VAh VL N VL L Hz PF ...

Page 26: ...1 L2 L3 AVG TOT VL N VL L Hz PF A W Wh VAr VArh VA VAh Parity Default Setting None Range None Even Odd Note For asynchronous communication user can select any one of three None Even Odd MFM374 VI A M VAF P E PRG 12 K M L1 L2 L3 AVG TOT VL N VL L Hz PF A W Wh VAr VArh VA VAh Stop Bit Default Setting 1 Range 1 or 2 Note For asynchronous communication user can select any one from 1 or 2 Optional avai...

Page 27: ... 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 MFM374 VI A M VAF P E PRG 13 14 MFM374 VI A M VAF P E PRG K M L1 L2 L3 AVG TOT VL N VL L Hz PF A W Wh VAr VArh VA VAh K M L1 L2 L3 AVG TOT VL N VL L Hz PF A W Wh VAr VArh VA VAh 15 MFM374 V...

Page 28: ... VArh VA VAh 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 MFM374 VI A M VAF P E PRG 18 K M L1 L2 L3 AVG TOT VL N VL L Hz PF A W Wh VAr VArh VA VAh Password Default Setting 1001 Selection 0000 To 9999 Note For resetting energy parameters user will be prompted the passw...

Page 29: ...efault Setting No Selection No Yes Note User can reset energy by selecting Yes User should note the reading before resetting 21 MFM374 VI A M VAF P E PRG K M L1 L2 L3 AVG TOT VL N VL L Hz PF A W Wh VAr VArh VA VAh 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...

Page 30: ...ounter 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 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...

Page 31: ... 30026 30028 30030 30032 30034 30036 30038 30040 30042 30044 0x00 0x02 0x04 0x06 0x08 0x0A 0x0C 0x0E 0x10 0x12 0x14 0x16 0x18 0x1A 0x1C 0x1E 0x20 0x22 0x24 0x26 0x28 0x2A 0x2C Voltage V1N Voltage V2N Voltage V3N Average Voltage LN Voltage V12 Voltage V23 Voltage V31 Average Voltage LL Current I1 Current I2 Current I3 Average Current kW1 kW2 kW3 kVA1 kVA2 kVA3 kVAr1 kVAr2 kVAr3 Total kW Total kVA ...

Page 32: ...ameter 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 Length Register 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 ...

Page 33: ...dary PT primary Readable writable parameters from MFM374 32 Modbus parameter Readable parameters from MFM384 Address Hex Address Parameter 30048 30050 30052 30054 30056 30058 30060 30062 0x30 0x32 0x34 0x36 0x38 0x3A 0x3C 0x3E PF1 PF2 PF3 Average PF Frequency kWh Address Parameter Hex Address 40000 40001 40002 0x00 0x01 0x02 Password 30046 0x2E Total kVAr kVAh kVArh ...

Page 34: ...aning 3P 4W 3P 3W Integer Integer Integer 1 1 2 5 1 100 100 10000 10000 500 500kV Max Value 5 33 selec Data Structure Length Register Float Float Float Float Float Float Float Float 2 2 2 2 2 2 2 2 Data Structure Length Register Integer Integer Integer Integer 1 1 1 1 Float 2 ...

Page 35: ...ctory Default 34 Modbus parameter Readable parameters from MFM374 Address Parameter Hex Address 40008 40009 40010 0x08 0x09 0x0A Baud rate Parity Stop bit 40011 40012 40013 0x0B 0x0C 0x0D Reset kWh Reset kVAh 40014 0x0E Reset kVArh Slave Id 0x07 40007 ...

Page 36: ...01 0x0002 300 600 1200 2400 4800 9600 19200 Meaning None Odd Even Value 1 1 Set to factory setting range Reset Total Active Energy Meaning Value Meaning 0x0000 0x0001 1 2 1 1 Reset Total Apparent Energy Reset Total Reactive Energy 35 selec Data Structure Length Register Integer Integer Integer Integer 1 1 1 1 Integer 1 Integer 1 Integer Integer 1 1 ...

Page 37: ...x19 0x1A 0x1B 0x1C 0x1D 0x1E 0x1F 0x20 0x21 0x22 40015 0x0F Auto Mode Pgs Page Address Sequence Page Address Sequence Page Address Sequence Page Address Sequence Page Address Sequence Page Address Sequence Page Address Sequence Page Address Sequence Page Address Sequence Page Address Sequence Page Address Sequence Page Address Sequence Page Address Sequence Page Address Sequence Page Address Seque...

Page 38: ...age 19 Last Page 1 First Page 19 Last Page 1 First Page 19 Last Page 1 First Page 19 Last Page 1 First Page 19 Last Page 1 First Page 19 Last Page 1 First Page 19 Last Page 1 First Page 19 Last Page 1 First Page 19 Last Page 1 First Page 19 Last Page 1 First Page 19 Last Page 1 First Page 19 Last Page Meaning 37 selec Data Structure Length Register Integer Integer Integer Integer Integer Integer I...

Page 39: ...ive 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 ...

Page 40: ...condary CT Primary PT Secondary PT primary Slave Id Baud Rate Parity Stop Bit Max Page Auto Change Page Sequence Page sequence 1 Page sequence 2 1000 No 3P4W 00005 350 350 001 9600 None 1 19 No 1 2 1 1 1 2 3 4 5 6 7 8 9 10 11 12 12 1 12 2 Page sequence 3 Page sequence 4 Page sequence 5 Page sequence 6 Page sequence 7 3 4 5 6 7 12 3 12 4 12 5 12 6 12 7 5 ...

Page 41: ...sequence 9 Page sequence 10 Page sequence 11 Page sequence 12 Page sequence 13 Page sequence 14 Page sequence 15 8 9 10 11 12 13 14 15 Page sequence 16 Page sequence 17 Page sequence 18 Page sequence 19 16 17 18 19 40 Config page 12 8 12 9 12 10 12 11 12 12 12 13 12 14 12 15 12 16 12 17 12 18 12 19 ...

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Page 44: ...ccumulated is 12345 6 top row will 2 middle row will display 345 6 K M L1 L2 L3 AVG TOT VL N VL L Hz PF A W Wh VAr VArh VA VAh VL N VL L Hz PF A W Wh K M L1 L2 L3 AVG TOT VAr VArh VA VAh MFM374 VI A M VAF P E PRG MFM374 VI A M VAF P E PRG Press E Total app Note 1 T Energy wil with lsb on Eg if ener display 12 Press VI between A Note By d In auto mo the rate of In auto mo temporaril relevant to key...

Page 45: ...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 E mail sales selec com Operating 1009 MFM374 Ver1 OP300 V01 Content ...

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