KPM37 Wireless 4G WiFi LoRa Din Rail Three Phase Energy Meter

KPM37 Wireless 4G WiFi LoRa Din Rail Three Phase Energy Meter

KPM37 Wireless 4G WiFi LoRa Din Rail Three Phase Energy Meter adopts DIN 35MM rail type installation structure and LCD display. It integrates three-phase electric parameter measurement, 2~31st harmonic analysis and time statistics. KPM37 default communication is Modbus-RTU by RS485 interface. WiFi, 4G, Lora communication are optional. The meter can also expand 2-way digital input and 2-way relay output, 4-way temperature measurement and 1 way residual current measurement.

KPM37 Wireless Three Phase Energy Meter has the advantages of small size, high accuracy, high reliability, easy installation, etc. It is mostly used for projects for system integration, wire line modification and in limited or inconvenient installation space, etc.

  • Communication protocol: Modbus-RTU, DL/T645, MQTT
  • Optional function: 2 digital inputs; 2 digital outputs;
  •                                  4 wires temperature measurement; residual current measurement.
  • Optional connection: Lora, WiFi, 4G, RS485
  • Installation method: DIN rail 35MM      three phase energy meter
  • Measurement: three phase UL-L, UL-N, I, F, PF, P, Q, S, four-quadrant power, etc. 
  • High accuracy:   U Class 0.2; I Class 0.2; P Class 0.5S.
                               Active energy Class 0.5S. 
                               Reactive energy Class 2.0.
  • Power quality analysis:
  • 2-31st harmonic analysis.
  • I/U Total distortion rate;Crest coefficient.
  • Valley coefficient;Current, Voltage imbalance rate.
  • Record function:
  • Monthly average power factor and power data for the last three months.
  • Demand and maximum and minimum data statics.
  • Meter working time, load time statics.
KPM37 Wireless 4G WiFi LoRa Din Rail Three Phase Energy Meter Model selection
KPM37 Wireless 4G WiFi LoRa Din Rail Three Phase Energy Meter Technical Specification

Working power source

Operating Voltage

AC 85-265V/ DC 80-310V

Rated power consumption

< 3VA

Input voltage

Rated voltage


Overvoltage capability

1.2 times rated voltage allowed, continuous work;

2 times the rated voltage allowed 10S

Rated power consumption

<0.5VA(per phase)

Measurement range

LN:50~260VAC, LL:90~400VAC

Frequency range


Input current

Rated current

Default 5A, input range 1-6A; optional 1A, input range 1-1.2A

Overload capacity

1.2 times rated current allowed, continuous work;

20 times the rated current allowed 1S

Rated power consumption

<0.75VA/phase(5A); <0.45VA/phase (1A)

Frequency range


Power quality monitor

Harmonic measurement

U/I 2-31st harmonic distortion rate

Harmonic distortion rate

Phase voltage,Phase current

Imbalance rate


Measurement accuracy





Active power


Reactive power


Power factor



±0.02 (0.01Hz)

Active energy


Reactive energy



communication port

RS485,Photoelectric isolation interface

Communication protocol

Modbus-RTU, 1200-19200BPS


Switch value input  

3-way passive main line contact DI input, internal supply DC24V power supply

Relay output

2-Way DO output, contact capacity 250VAC / 5A, 30VDC / 5A

Working environment

Operating temperature

-25℃ ~ +70℃

Storage temperature

-30℃ ~ +75℃

Relative humidity

5% ~ 95% No condensation


Not more than 3000m



Dielectric strength

Power frequency voltage AC 2kV, working time 1 min

Insulation resistance


Impact voltage

5kV (Peak),1.2/50us

Electromagnetic Compatibility

Electrostatic discharge immunity

IEC61000-4-3, level 4

Fast pulse group immunity

IEC61000-4-4, level 4

Surge immunity

IEC61000-4-5, level 4

Power frequency magnetic field immunity

IEC61000-4-8, level 4


KPM37 Three Phase Energy Meter 4 wire star system:Direct wiring without voltage transformer(PT)


KPM37 Three Phase Energy Meter Triangle system: No voltage transformer(PT), 3 current transformers(CT)

( device is set to P3L3)


KPM37 Specification Jan 01,70

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