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Calibration
AC watt-hour meter test device


 

 

Measuring standard device

Measuring range

Accuracy grade

Three phase standard power electrical energy meter RD33-234

3×(60~480)V

3×(5mA~200A)

Class 0.01

Three phase standard power electrical energy meter MT3000

3×(57.7~380)V

3×(0.1~100)A

Class 0.02

Three phase standard power electrical energy meter TPZ303

3×(57.7~380)V

3×(0.1~20)A

Class 0.02

 

Measuring instrument

Calibration items

Measuring range

Calibration uncertainty

Single-phase/Three-phase watt-hour meter test device, etc.

Electrical energy

Phase voltage:

3×(60~320)V

Line voltage:

3×(70~555)V

Current:

3×(5mA~100A)

cosφ=1.0、0.5L、0.5C:Urel=0.012%,k=2