Welcome to National Center of Quality Supervision and Testing on Electricity Meters !
Calibration
Standard electrical energy meter


 

 

Measuring standard device

Measuring range

Accuracy grade

Three phase standard power electrical energy meter COM3000

(Major ancillary equipment:Three phase high precision power standard source MTS61,Voltage withstand test device NC-1)

3×(60~480)V

3×(3mA~120A)

Full power factor range

Class 0.01

 

Measuring instrument

Calibration items

Measuring range

Calibration uncertainty

Single phase/Three phase electrical energy meter,

AC energy meter field calibrationdevice

Electrical energy

Phase voltage:

3×(60~320)V

Line voltage:

3×(70~555)V

Current:

3×(5mA~100A)

Balanced load: 1.0、0.5L、0.8C、0.5C;

Unbalanced load: 1.0、0.5L:100mA~100A:

Urel =0.008%,k=2

5mA~100mA:

Urel =0.015%,k=2