KPM73 Multifunction power meter

KPM73 Multifunction power meter

KPM73 Multifunction power meter with accurate measurement of power parameters, bi-directional four-quadrant energy measurement, time and load statistics, recording functions, using advanced ARM processor and digital signal processing technology. It integrates with comprehensive three-phase electrical parameters measurement and display, energy consumption, power quality analysis, multi rates statistics, switch input, digital output and communications networks in one, with finely manufacturing process, good electrical insulation and electromagnetic compatibility, large-screen LCD liquid crystal display, etc.


  • Digital panel multifunction power meter
  • Full electrical parameter measurement: UL-L, UL-N, I, F, PF, P, Q, S, four-quadrant energy, etc. 
  • High accuracy:
  • U Class 0.2;I Class 0.2
  • P Class 0.5S; Active energy Class 0.5S
  • Power quality analysis:
  • 2-51st harmonic analysis;I/U Total distortion rate;
  • Crest coefficient;Valley coefficient;
  • Current, Voltage imbalance rate;Setpoint limit alarm function.
  • Record function:
  • Monthly average power factor and power data for the last three months
  • Electrical parameters maximum and minimum data
  • Meter working time, load time statics&100 events record.
  • Communication: RS485/Modbus-RTU; Profibus-DP
  • Optional function: H--2-51st harmonic analysis 
  • Optional function: P--Profibus-DP communication; DM—Demand analysis


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:90~450VAC

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)

Measurement range

5A:0~6A;  1A:0~1.2A

Power quality monitor

Harmonic measurement

U/I 2-51st 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, 1200-38400BPS



Switch value 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

Analog output

Output range 4-20mA, overload 1.2 times

Temperature input

Temperature range 0-100℃

Working environment

Operating temperature

-25℃ ~ +70℃

Storage temperature

-30℃ ~ +75℃

Relative humidity

5% ~ 95% No condensation


Not more than 4000m



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


KPM73A High-voltage three-phase three-wire typical wiring


KPM73A Low-voltage three-phase four-wire typical wiring


KPM73 specification Jan 01,70
KPM73 User Manual Jan 01,70

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