KPM37 Three Phase Power Meter

KPM37 Three Phase Power Meter has a DI 35MM rail type installation construction and an LCD display. Time statistics, 2~31st harmonic analysis, and three-phase electric parameter measurement are all integrated.By default, KPM37 uses an RS 485 interface for Modbus-RT communication. 4G, WiFi, and Lora connectivity are optional. The meter can also measure temperature four ways, residual current one way, and digitally input and output two ways.

The KPM37 provides a number of benefits, including ease of installation, high precision, high reliability, and small size. It is primarily employed in system integration projects, wire line modifications, and installations in tight or awkward spaces, among other applications.

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Feature of Three Phase Power Meter

  • measuring the voltage, current, power factor, frequency, demand, maximum and minimum values, and four quadrant power of an AC system.
  • Variable voltage to current transformation ratio
  • Statistics for running and loading times 2-31st harmonic computation and examination
  • Modbus-RT communication via the RS485 port by default
  • extending Two DO and two DI
  • extending Measurements of residual current and temperature Wi-Fi, 4G, and Lora wireless connectivity options
  • exceptional properties for temperature and stability of work Seven plus one digit LCD display


  • In medium and low voltage power system
  • Protect circuits from overload, short circuit and other faults
  • In industrial control system
  • Protect motors, transformers and other equipment
  • Used in household, commercial and industrial building electrical
  • Used to protect communication equipment, communication lines, etc.
  • Electrical system of new energy equipment such as solar energy and wind energy
  • Guarantee the safe operation of electrical equipment


Working power source Operating Voltage AC85~265V/DC80~300V
Rated power <3VA
Input voltag Rated voltager 57.7/100VAC,220/380VAC
Overload capacity 1.2 times rated voltage allowed, continuous work; 2 times the rated voltage allowed 1second
Power consumption <0.5VA/phase(rated)
Measurement range LN:50~260VAC,LL:90~450VAC
Frequency range 45~65Hz
Input current Rated current Default5A,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 1 second
Power consumption <0.75VA/phase(Rated current 5A);<0.25VA/phase(Rated current 1A)
Frequency range 45~65Hz
Input/ Output Switchinput 2-way passive main line contact DI input, internal supply DC24V power source
Relay output 2-way DO output, Contact capacity 250VAC/5A, 30VDC/5A
Power quality monitor Harmonic measure
Voltage/current 2~31st harmonic distortion rate,total harmonic distortion rate
programmable voltage current transformation ratio Phase voltage,phase current
Harmonic distortion rate (THD) voltage,current
Measure ment accuracy Voltage ±0.2%(0.01V)
Current ±0.2%(0.01A)
Active power ±0.5%(0.1W)
Reactive power ±2.0%(0.1var)
Apparent power ±0.5%(0.1VA)
Active energy 0.5S(0.1kWh)
Reactive energy ±2.0%(0.1kvarh)
Power factor ±0.5%(0.001)
Frequency ±0.02Hz(0.01Hz)
Communi cation interface Communication interface RS485 / WIFI / 4G/ Lora
Communication protocol Modbus-RTU,DL/T645-2007, M TT, 1200~38400bps

Communi cation interface

Power frequency

withstand voltage

AC2kV/min~1mA Input-output-power source
Insulation resistance >50MΩ
Impact voltag 5kV(Peak),1. 2/50us
Working environm ent Operating


Relative humidity 5%~95% No condensation
Storage temperature -30℃~+75℃
Altitude No more than 3000m
Electrom agnetic Compati bility Surge (impact)
GB/T 17626.5-2008,Level4,IEC61000-4-2, level 4
Fast pulse group
GB/T 17626.4-2008,Level4,IEC61000-4-5, level 4
Electrostatic discharge immunity GB/T 17626.2-2006,Level4,IEC61000-4-4, level 4
Power frequency

magnetic field immunity

GB/T 17626.8-2006,Level4,IEC61000-4-8, level 4