HMDQ Current Transformer Test Bench

The HMQT-I is a new-generation, fully automatic, program-controlled source-type multi-CT transformer calibration unit developed by Wuhan Goldhome Hipot Electrical Co., Ltd. It is primarily designed for the fully automatic error calibration and characteristic testing of current transformers (CTs) and voltage transformers (PTs), and is widely used in power systems, metering institutions, transformer manufacturing plants, and other similar settings. 

• The device adopts program control source technology to make the location of test point more rapid and accurate.
• This device has a qualitative improvement in the measurement speed of multiple current transformers, which can measure 12 current transformers with any variable ratio in 3-5 minutes.
• The load box can be automatically switched during measurement.
• The device can be used for measuring the specifications and non-specifications of the transformer, and the user can specify any percentage point of measurement when measuring.

1.Environmental condition
Temperature ：5℃~40℃
Relative humidity：<80%(25℃)

Altitude：<2500m

power frequency：50Hz±0.5Hz

Power voltage：220V±5V

2.Measurement range
In-phase component(%)：0.0001~200.0 resolution：0.0001

Quadrature component(S)：0.001~999.9 resolution：0.001

Impedance(Ω)：0.0001~60.0 resolution：0.0001

Admittance(ms)：0.0001~60.0 resolution：0.0001

3.Intrinsic error

In-phase component：ΔX=±(X×2%+Y×2%±2 digits)
Quadrature component：ΔY=±(Y×2%+±X×2%×34.38)±5 digits

"X","Y"-- display value of the instrument
"5 digits"-- quantitative error of the instrument

Dial indicator: 1class

4. Operating range
Current ：(1%-149%)In (In=5A)

5.Operating load： Current： To Tx<0.12W cosφ=1.0