Single Phase Electrical Ampere Voltage Frequency Power Energy Meter Coulometer


Single Phase Electrical Ampere Voltage Frequency Power Energy Meter Coulometer

True RMS measurement for current, voltage, power, power factor, frequency, KWH, reactive power in single phase system.

Widely applied in energy management systems, substation automation systems, power distribution automation systems, smart distributors, switch cabinets, intelligent building, machinery and equipment.



CHD900 single phase electric ampere voltage frequency power meter coulometer is applicated for preset AC or DC current voltage range.

  • SINGLE PHASE MEASUREMENT: 3 phase measurement item is CHD9000, CHD9001.
  • LED DIGITAL TUBE DISPLAY: Three rows of 4-bit bright red LEDs simultaneously display three-phase current or voltage values or other parameters, which are intuitive and clear.
  • TRUE RMS MEASUREMENT: Adopting true RMS measurement, high precision, good stability, transformer multiplex rate can be set on-site through the instrument button, easy to use and flexible.
  • CT/PT RATE: the multiplex rate of transformer can be set on the spot by the instrument button, which is convenient and flexible to use.

Main Features

  • LED Single Phase Multifunctional Power Meter
  • Dimension: 96×96×84 mm
  • Power supply: 85~265V AC  45~65Hz, Consumption: <5VA or 18-30V DC
  • Direct measuring range: 0-600V, 0-5A
  • CT,PT input
  • Analog output: 4-20mA / 0-10mA
  • 1~2 alarm outputs
  • RS485 communication interface, standard MODBUS protocol
  • Ambient environment: -10~55℃  5%-95%RH  no condensing

More powerful and flexible product

4 buttons operation, user-friendly

CT/PT input, True RMS measuring coulometer

single phase power meter coloumeter package details


Model CHD900 Single phase coulometer Note
Power supply Default 90-260V AC/DC
E 18-30V DC
Analog output I 4-20mA or 0-10mA
default None
AL1 R Relay
N None
AL2 R Relay
N None
Communication interface 4 RS485
2 RS232
default None
Input signal AV AC voltage 2 inputs

indicate the range

AA AC current
DV DC voltage
DA DC current

Power Supply:

85~265V AC  45~65HZ

or 18-30V DC

Consumption: <5VA

Rated voltage: 600V / PT

Rated current: 5A  / CT

Overload: voltage: 1.2 times(sustained); current: 1.2 times(sustained), 10 times/1second

0 ~ 250Hz

2 times/second

Relay alarm output: 1~2 no.s, capacity: normal open 250V AC 3A or 30V DC 3A

Analog output: 4-20mA / 0-10mA

RS485 / RS232 communication interface

standard MODBUS RTU protocol

9600 bit/s fixed

Voltage: ± 0.5% ± 2 digits
Current: ± 0.3% ± 2 digits
Power: ± 0.5% ± 2 digits
Power factor: ± 0.5% ± 2 digits
Frequency: 0 ~ 250Hz ± 1Hz

Body: 96x96x84mm

Cutout size: 91+0.5 × 91+0.5 × 85mm

Mounting Method: Flush-mounting and screw terminals

IP grade: IP65 for the panel

Warranty: 12 months

For support, please visit support center or email us at

1 x CHD900 single phase power meter coulometer

2 x Mounting brackets

1 x Manual