KPM312 Multi Channel Power Meter Three Phase 4 Channel

KPM312 series Multi Channel Power Meter, a three-phase intelligent power energy efficiency terminal, supports 4 branch circuit power monitoring and data transmission.

  • Default RS485 Modbus-RTU communication
  • Optional WiFi, 4G, Lora communication
  • 4-way digital input and 4-way relay output
  • 4-way temperature measuring for each circuit.
  • 35mm din rail installation
  • LCD screen display, small size, high precision, and good reliability
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KPM312 series three-phase rail-type intelligent power energy efficiency terminal adopts a DIN35mm rail-type installation structure and LCD screen display. It can measure the electrical parameters of 4 three-phase loops, 2nd to 31st harmonics, statistical operation time, etc., and is equipped with 1 RS485 as a standard Communication interface that can realize network management of instruments through Modbus-RTU or MQTT communication protocol. It can also be expanded to 4 channels of switching inputs and 4 channels of relay outputs, and external open-type transformers are easily connected to the construction of renovation projects. KPM312 has the advantages of compact size, high precision, good reliability, and easy installation. It is mostly used in system integration, renovation projects, and projects with limited or inconvenient installation space.

dimension of kpm312 muli-channel power meter energy meter


  • 4-channel 3-phase electric parameter measurement such as AC voltage, current, four-quadrant electric energy, active/reactive power, apparent power power factor, frequency, demand, maximum value, etc.
  • 1 RS485 communication interface, Modbus-RTU, MQTT, or DL/T645-2007 communication protocol
  • High accuracy for U, I, P, active energy, and reactive energy meter
  • Programmable voltage and current ratio
  • Expandable 4 channels of passive switching input
  • Expandable 4-way relay output
  • Expandable Lora, WiFi, 4G communication
  • Expandable 4 temperature inputs
  • 7+1-digit FSTN liquid screen display

feature of kpm312 multi channel power meter din rail meter


Working power source Operating Voltage AC 85~260VAC
Rated power consumption < 3VA
Input voltage Rated voltage 3*220VAC
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
Frequency range 45-65Hz
Input current Rated current 5-800A based on CT range
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 45-65Hz
Power quality monitor Harmonic measurement U/I 2-31st harmonic distortion rate
Harmonic distortion rate Phase voltage, Phase Current
Imbalance rate Voltage, Current
Measurement accuracy Voltage ±0.2%(0.01V)
Current ±0.2%(0.01A)
Active power ±0.5%(0.01W)
Reactive power ±2.0%(0.01var)
Power factor ±0.5%(0.001)
Frequency ±0.02 (0.01Hz)
Active energy ±0.5%(0.1kwh)
Reactive energy ±2.0%(0.1kvarh)
Communication Communication RS485, WIFI, 4G, LORA
Communication protocol Modbus-RTU, 1200-38400BPS
DI & DO Digital input 4-way passive main line contact DI input, internal supply DC24V power supply
Relay output 4-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
Altitude Not more than 3000m


Dielectric strength Power frequency voltage AC 2kV, working time 1 min
Insulation resistance >50MΩ
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


wiring diagram of kpm312 multi channel power meter 3 phase energy meter


  1. Energy management system integration
  2. Old project or wireline modification
  3. Projects with limited space or inconvenient installation
  4. Measured circuits are near or in one cabinet