MFM384 Multifunction Meter
Features:
! 3Ø True RMS (Voltage, Current)
! 3Ø Power (Active, Reactive, Apparent), Energy (Active, Reactive, Apparent)
! Programmable CT/PT Primary/Secondary
! CT Polarity Error Detection
! Variable Pulse width Selection
! Single Phase Network with Phase Selection
! Modbus RTU Communication (RS485)(Optional)
! Neutral Current Measurement
! THD Upto 31st Level.
! Single Pulse Output / Demand
! Phase Sequence Detection
UL
Certifications: C US
LISTED
96 X 96mm
Output Specifications
Pulse Output Voltage Range - External 24V DC max
Display Specification
Current Capacity - 100mA max
Display 4 rows, LCD with backlight Pulse Width - 100 ms ±5 ms
Digits 4 (Lowest 8 digits for energy display) Communication Interface RS485 and MODBUS RTU
Bargraph For Current representation
and Protocol
Communication address 1 to 255
Input Specifications Transmission mode Half duplex
Electrical Connection 3Ø-3/4 wire, 2Ø-3 wire, 1Ø-2 wire Transmission distance 500 Meter maximum
Input Voltage Range 11 to 300V AC, (Phase to Neutral)
19 to 519V AC, (Phase to Phase) Transmission speed 300, 600, 1200, 2400, 4800, 9600, 19200
(in bps)
Input Current Range Nominal 5A AC (Min-11mA, Max-6A)
Frequency 45Hz - 65Hz Parity None, Odd, Even
Display Scrolling Automatic / manual Stop bits 1 or 2
Power Consumption 8VA Max Response time 100 ms (max and independent of baud rate)
Display Reset Programmable (For energy)
Resolution For energy -
0.01k, 0.1k, 1k, 0.01M, 0.1M, 1M
(depending upon CT ratio x PT ratio)
Auxiliary Supply Specifications
For Power, Voltage,
Current - Auto resolution Supply Voltage MFM384 / MFM384-C : 100 to 240V AC,
For Power factor - 0.001 -15% +12%, 50/60 Hz, (±5%)
Accuracy Voltage (L-N / L-L), Current: ±0.5% of F.S
Power factor: ±0.01
Frequency: ±0.1% For L-N Voltage >20V
For L-L Voltage >35V Settable Parameters
Power (Active, Reactive, Apparent) : 1% CT Primary 1/5A to 10kA (Programmable for
Energy (Active, Reactive, Apparent) : Class 1 any value)
Memory Retention 10 years (For energy) CT Secondary 1/5A (Programmable)
Measuring Parameters Voltage (L-L / L-N) (Individual / Average) PT Primary 100V to 500kV (Programmable for any
Current (I1, I2, I3) (Individual / Average) value)
Frequency, Power Factor (Individual / Total)
PT Secondary 100V to 500V (Programmable for
Active, Reactive & Apparent power (Individual /
any value)
Total), Active, Reactive & Apparent Energy
(Total), Demand (Min / Max Active Power, Min /
Max Reactive Power, Max Apparent Power),
%THD upto 31st Level Max Demand Current, Environmental Specifications
Neutral Current, Phase Sequence Detection
Temperature Operating Temperature: -100 to +550 C
Storage Temperature : -200 to +750C
Humidity Upto 85% RH
www.selec.com 1
MFM384 Multifunction Meter
Mechanical Specifications Compliance
Mounting Panel mount Applicable EMI / EMC Standards
Weight 318 gms Product Standard : IEC 61326-1
Category Standards Compliance
Level IV (Air discharge : 15kV),
ESD Immunity IEC 61000-4-2
(Contact Discharge : -8kV)
Dimensions +/- 2kV common mode, (Line to ground)
Surge Immunity IEC 61000-4-5
+/- 1kV differential mode, (Line to Line)
Level III, 80 to 1000MHz (10V/m)
90.5 91.5 Radiated Susceptibility IEC 61000-4-3 Level II, 1.4GHz to 2GHz (3V/m)
99 Level I, 2GHz to 2.7GHz (1V/m)
Conducted Susceptibility IEC 61000-4-6 Level II (3V/m)
Dips : 0% residual voltage /
99 50 91.5
5 1 cycle (Criteria B), 40% residual voltage /
Front bezel Side view Panel cutout 10 cycles 50Hz / 12 cycles 60Hz (Criteria C)
Voltage Dips and 70% residual voltage / 25 cycles
IEC 61000-4-11 50Hz / 30 cycles 60Hz (Criteria C)
Interruptions
Interruptions : 0% residual voltage /
250 cycles 50Hz / 300 cycles 60Hz
(Criteria C)
Conducted Emission CISPR-11
Terminal Connections
Radiated Emission CISPR-11
MFM384 / MFM384-C
Electrical Fast Transient IEC 61000-4-4 Level III (2kV)
N
L
valid for
communication
+
PULSE O/P RS485 model only
Ordering Information
Output Certification
Supply Voltage
Product Code (-15% to +12%)
L1 L Pulse Comm.
L2 O Output (RS485)
L3 A
N D MFM384 100 to 240V AC
S1 S2 S1 S2 S1 S2 N V1 V2 V3
I1 I2 I3 MFM384-C 100 to 240V AC
MFM384-C-CE 100 to 240V AC
www.selec.com 2
