PowerhV-1400kV 28000kVA AC Resonant system for GIS & bushing test

AC resonant test system

Testing of certain apparatus requires much high voltage or current that a straight AC test system is not sufficient. Thus resonant test reactor with a variable core is needed. The main advantage of such test systems is lower input power and larger output power. The resonant test system is designed to compensate capacitance in the testing circuit precisely by tuning inductance of the test system. The natural resonance frequency of the test system matches feed-in mains, usually 50/60Hz. When the test system gets in resonance, it generates continuous testing high voltage.

is used for factory testing of middle, high and ultra-high voltage cables, capacitors, generators, motors, power transformers and gas-insulated switchgears.

The resonant test systems can be either in insulation cylinder type or metal tank. Insulation cylinder reactors are in module and can be stacked to connect in series parallel to get much higher voltage or current. Additional voltage taps are possible for metal tank reactors. The output voltage is fed out through the tap-changers by HV bushings. This kind of reactors extend application range, and satisfy testing for cables of various voltage class.

Application

For routine testing of high and ultra-high voltage cables up to 800 kV in accordance with IEC 60840 and IEC 62067

For inspection testing of high and ultra-high voltage cables and cable assemblies up to 1600 kV in accordance with IEC 60840 and IEC 62067

For applied voltage testing of power transformers up to 1600 kV in accordance with IEC 60076

For testing of gas-insulated switchgears up to 1600 kV in accordance with IEC 62271-203

For testing of voltage transformer including testing with higher frequencies and performing dynamic tests up to 1600 kV in accordance with IEC 60044