UHV-H Series Power Frequency Inductance Adjustable AC resonant Test System can conduct the Withstand Voltage test for 110~ 500kV Electromagnetic Transformer,CVT, capacitance:0.004-0.008uF etc. And the system is mainly composed by AC Power Source, Excitation Transformer, High voltage reactors, High voltage Divider etc. The whole system comply the standard: GB10229-88, GB1094, GB50150-91. And the system have following features:

1 the output voltage waveform is good, the circuit is in the power frequency resonance state, showing low reactance to the power frequency fundamental current and high reactance to other harmonic currents, so it has excellent filtering performance.

2 small power supply capacity is required. Q-factor is 20 times of the required capacity of the power supply.

3 when the sample breaks down and the circuit is detuned, the reactor will immediately limit the short-circuit current. The loop current is only 1 / Q of the normal working current, which will not aggravate the damage to the tested object.

4 the device is a dry-type combined series resonant device, which is composed of a dry-type test transformer (excitation transformer) and a dry-type reactor.

5 the whole set of equipment of the device shall be of combined type and suitable for field use.

6 the voltage regulating control box has over-current protection function, and the over-current protection adopts dial setting.

7.the reactor used in the device shall adopt the mode of continuously adjustable air gap to conveniently adjust its inductance value in a wide range