Modbus Power Energy Meter


Modbus Power Energy Meter

Quality engineered energy submeters provide a simple robust solution for power monitoring, power quality analysis, KWh metering, system integration, controlling power distribution systems & other specialty applications.



CHD7002 series digital 3 phase Modbus power energy meter is suitable for power distribution cabinet & switchgear under low-voltage power distribution system(<35KV). The network management will finally realize automation control via RS485 communication. The powerful functions are as below:

  • Specially for 380V~35kV voltage level’s industry and commercial building
  • Supports a wide range of phases and wire systems– 3P3W, 3P4W.
  • Field Configurable 5A/1A CT Input
  • Full real-time data measurement & True RMS monitoring
  • Demand statistics function–average current, total power, total reactive power, total apparent power.
  • 50th harmonic analysis, THD, THDu, THDi
  • Time-of-use( Multi-tariff billing), historical data of 31 days and 12 months
  • Record historical energy for latest 31 days, latest 12 months, latest 50 usage records
  • Setpoint alarm for over/under the limit
  • Build-in MODBUS-RTU via RS485 port
  • High accuracy, Active energy: GB/T17215.322-2008, class 0.5s

Main Features

  • Backlit LCD type Power  Energy meter
  • Dimension: 72×72×80 mm
  • Power supply: 85~265V AC, 45~65Hz, Consumption: <5VA
  • Measure range:  0-30,000A, 0-28.8/50KV
  • Ambient environment: -10~55℃  5%-95%RH  no condensing
  • Accuracy: 0.2 for current/voltage  1 for reactive KWH
  • Display of harmonics by order to 2~50st
  • Maximum demand can be measured over preset periods of up to 60minutes
  • 2 sets of counting modes: Summertime/Wintertime mode, Workday/Weekend mode, 4 tariffs with 8 segments
  • With 2 DI and  4 DO function, can be used for remote monitoring and control.
  • One group of 4-20mA analog output
  • Built-in MODBUS RTU & DL645-2007 protocol via RS485 port
  • Built-in clock
  • Widely used in Power Distribution Automation, Electric Switch Gear and Control Panels, Industry Automation, Building Automation, Energy Management Systems, Marine Applications, Renewable Energy.

Smart Electricity Meter

True RMS measurement & Multi-tariffs

Cost-effective & Reduce consumption

power energy meter backside


Model CHD7002 3 Phase LCD Power and Energy Meter  (72*72*80mm size)
Function mode default Display function + RS485
E Display function + RS485+2 none-contact inputs + 2 relay outputs
Expand function H Harmonic function
A0 4-20mA
Power supply default 85~265V AC/80~300VDC
E 24~48V DC
Measure range V1 3×57.7/100V 1A
V2 3×57.7/100V 5A
V3 3×220/380V 1A
V4 3×220/380V 5A

Power Supply:

85~265V AC    45~65HZ

Consumption: <5VA

Rated voltage: 220V / 380V / 100V PT

Rated current: 1A / 5A / CT

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

3 phase 3 wire type

3 phase 4 wire type

No-contact switch input, 2 no.s

Relay alarm output, 2 no.s

Pulse constant output, 1 no.s

4-20mA analog output, 1 no.s(optional)

Electrical Parameters Parameters Range Accuracy
Voltage 10V ~ 288V(Quadratic value) 2%
Current 5% ~ Max 2%
Power factor -1 ~ 1 5%
Active energy 0 ~ 99999999.9 0.5S
Reactive energy 0 ~ 99999999.9 Grade 2
Active power Single-phase: 0 ~ ±100 MW/var/VA

Total: 0 ~ ±100 MW/var/VA

Reactive power  1.0%
 Consumption ≤ 2W/4VA
Environment condition Normal work temperature -10℃ ~ +45℃ Extreme work temperature -25℃ ~ +55℃
Storage temperature -25℃ ~ +70℃ Work humidity 5%~ 95%%no condensing
Insulation performance Withstand voltage 2000VAC Surge voltage 6000V
Insulation resistance ≥ 100MΩ
  • 2 modes(Summertime/winter time, weekday/weekend mode 1, weekday/weekend mode 2.) tariffs.
  • Provides up to 4 different tariffs( sharp, peak, valley and normal) to 8 different time periods within a day according to the billing requirements.
  • The meter will calculate and accumulate energy to different tariffs according to the meter’s internal clock timing.

Record historical energy as below:

  • Daily freezing for latest 31 day
  • Monthly freezing for latest 12 months
  • Contact freezing for the current day within 24 hours, min resolution: 15 munites
  • Time freezing for the last 2 hours yesterday
  • Voltage deviation
  • Rotal harmonic distortion(THD)
  • Voltage/Current harmonic percentages
  • Demand time setting: 5/10/15/20/30 munites
  • Max monthly demand for the latest 12 months will be recorded.
  • Clear max demand function available
  • RS485 communication interface
  • standard MODBUS RTU protocol/ DL645 protocol configurable
  • 5 speeds: 2400, 4800, 9600(factory default), 19200, 38400bps

Body: 72x72x80mm

Cutout size: 70x70mm

Mounting Method: Flush-mounting and screw terminals

IP grade: IP52 for the panel, IP20 for the whole item

Warranty: 12 months

For support, please visit support center or email us at

1 x CHD7002 3 phase multifunction power meter

4 x Mounting brackets

1 x Manual