STS Series Energy Meters

GST7666 Three Phase Prepaid Keypad Electricity Meter

GST7666 Three Phase Prepaid Keypad Electricity Meter
Electricity Meter GST7666 Three Phase GST7666 Three Phase Prepaid Keypad Electricity Meter

GST7666 Three Phase Prepaid Keypad Electricity Meter

Three Phase Split Keypad Prepayment Electricity Meter

The CA368 offers options for extended surge protection for lightening up to 13kV with a build-in 6.5kA VDR and a wide voltage working range. It is intended for unstable grid voltage environment such as African and Central American continent where brownouts and voltage dips are extremely frequent. The meter works in a three phase four wire or three wire (optional) network with 100 Amp per phase, and 30 Vm withstand of RF immunity, allowing it to operate in very severe environments. It is a perfect revenue protection device for sub-metering of residential, light commercial and industrial applications.


  • 20 digit (Standard Transfer Specification) STS encryption
  • Up to l3kV/6.5kA surge protection for lightening and other line surges
  • R optical & RS485 port allowing for easy data interrogation
  • Disconnects on overload and no credit
  • Programmable power limit and low credit warning
  • Tamper detection and event record such as opening cover, reverse connection, black-out
  • Easy access to 12 months historical consumption data and last 5 token entered
  • Maximum demand measurement and load profiling (on request)
  • Meter provides detailed power information such as phase voltage, current, total active power,
  • reactive power, apparent power, total power factor, power grid frequency

AMR/AMI Smart Metering Function (on request)

  • Available with User Interface Unit (UIU) for split type applications
  • PLC/ RF/ GPRS/GSM communication
  • Time of Use (TOU)/ 4 tariffs /8 time divisions /100 holidays.
  • Advanced load control and disconnection features
  • DLMS/COSEM , IEC62056 protocol compliant

Electrical parameters:

Nominal voltage Un 3x240V
Limited voltage 60%~130%Un
Frequency 50/60Hz+5%
Basic current(Ib) 10A
Maximum current(Imax) 100A
Starting current(Ist) 30mA
Active energy constant 400imp/kWh
Active energy to EC62053 - 21 Class1.0
Reactive energy to IEC62053- 23 Class2.0
Power Consumption  
Power consumption in V oltage circuit < <2W <8VA
Power consumption in current circuit <1VA
Temperature range  
Operation meter -25°C to+70°C
Storage -40°C to+85°C

Insulation strength

AC Insulation strength 4kV at 50Hz during lmin
Impulse voltage 1.2/50us mains connections 8kV

Electro Magnetic Compatibility

Electrostatic discharges  
Contact discharge 8kV
Air discharge 16kV
Electromagnetic RF fields  
27MHz to 500MHz typical 10V/m
100kHz to 1GHz typical 30V/m
Fast transient burst test 4kV

Mechanical requirements

Protection Rating P54
Insulation Classification Protective Class II
Maximum cable diameter 10 mm



Wiring Diagram

Wiring Diagram

To find more benefit of our product and solutions, please contact us for further details.