Selec MFM374 User manual

MFM374
Multifunction Meter
OPERATING INSTRUCTIONS
Operating / 1009 / MFM374 / Ver1, OP300-V01.
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Creating Best Value

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1. INTRODUCTION
1.1 About MFM374.............................................................................................. 01
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

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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:
1. Electric Automation SCADA System:
MFM374 can be used as Remote Terminal Unit (RTU) for monitoring purpose in a
SCADA System. All measured data is available through RS485 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 Distribution field
5. Power System Protection Field
6. Industry Automation
7. Large UPS System
Note: Please read this manual carefully & completely before installing /
operating MFM374.
Specifications are subject to change as development is a continuous process

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Introduction
02
Ø 3 rows of 4 digits
Ø Network supported: 1Ø-2 wire, 2Ø-3 wire, 3Ø-3 wire, 3Ø-4 wire
ØUser programmable network selection
Ø 7-segment red LED display
Ø Auto / manual page scrolling
ØUser programmable page sequence for page displayed in auto mode
Ø Measures all electrical 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)
ØProtection covering for terminal screws
SALIENT FEATURES
ORDER CODE:
Overview
2) MFM 374-C (With communication version)
1) MFM 374

Introduction
Display & Key description
1. 3 lines of seven segment digits in
metering area
Display parameters such as Voltage,
Current, Power factor, Power &
Frequency, Energy
2. Unit (V, A, PF, Hz, kW, kVAr, kVA)
Indicates unit of parameter 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
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5
4
1
2
3

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7 segment bright red LED display
3 lines, 4 digits per line to show electrical parameters
1 sec for all parameters
LED indication for all electrical parameter such as V, I, PF,
Hz, kW, kVA, kVAr, kWh, kVAh, kVArh, k (kilo), M(mega),
avg, tot, L1, L2, L3
1 Ø-2 wire, 2 Ø-3 wire, 3 Ø-3 wire, 3 Ø-4 wire
Programmable 1A or 5A
100V to 500kV (Programmable for any value)
100 to 500V AC (L-L) Programmable for any value
0.5 VA per phase @ 5A
11 to 300V AC max phase 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
Technical Overview
Input Point Electrical Specification
Electrical input type
CT Secondary
Rated input voltage
Rated input current
CT Primary
PT Primary
PT Secondary
Burden
Display Scrolling
Online Pages
Auto / Manual
Frequency range 45 to 65 Hz

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Introduction
05
Interface standard &
protocol MODBUS RTU protocol over RS485
General Specification
Pulse Output
Auxiliary Supply
Pulse Output (type)
Operating frequency
Pulse Voltage
Pulse Current
Pulse Width
Power Consumption
Temperature
Humidity
Mounting
Weight
85 to 270V AC/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)
None, Odd, Even
1 or 2
100 ms (Independent of baud rate)
Serial Communication (Optional)

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Measured values Unit
kW , kW , kW and Total kW
1 2 3
kW
kVA , kVA , kVA and Total kVA
1 2 3
kVA
V
A
Individual and average
-
Hz
kWh
kVAr , kVAr , kVAr and Total kVAr
1 2 3 kVAr
kVArh
kVAh
V1N, V2N, V3N, V12, V23, V31,
Vavg L-N, Vavg L-L
1) For voltage, Current, Power, resolution is automatically adjusted
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 Energy
NOTE:
Resolution Table
PT Ratio x CT Ratio
<15
<150
<1500
<15000
<150000
≥1500000

Introduction
Measurement
Voltage VL-N
Voltage V
L-L
Frequency
Active Power
Apparent power
Power factor & Avg Pf
Active energy
Reactive energy
Apparent energy
Current
Average current
Average Voltage L-N
Average Voltage L-L
Reactive Power
Toll free: 1800 227 353
Phone: [phone]
Email: [email protected]
Accuracy
07
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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)