The natural resonance frequency of the test circuit is matched to the feed-in mains frequency 50/60 Hz by setting the variable inductance of the HV reactor.
If the HV reactor and test object are designed to form a series resonant circuit, the result will be an ideal sinusoidal testing voltage. The oil-cooled HV reactor is installed in a closed steel tank. The high voltage is fed outward through the steel tank via a HV bushing. The reactor can be fitted with additional voltage taps (bushings) to achieve largest testable capacitances of test objects at lower test voltages.
Application:
For routine testing of medium and high voltage cables up to 400 kV in accordance with IEC 60502 und IEC 60840
For routine testing of high voltage capacitors up to 60 kV in accordance with IEC 60871
For routine and inspection testing of generators and motors up to 60 kV in accordance with IEC 60034
Benefits
Low level of partial discharge < 2 pC
Higher duty cycle thanks to excellent cooling properties
Low power demand due to high quality factor
Ideal sinusoidal test voltage for series resonance systems
Low noise level thanks to special mechanical design
Low maintenance operation over the entire service life of the test system