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. The HV reactor and the test object form a series resonant circuit, resulting in an ideal sinusoidal resonance voltage. The oil-cooled HV reactor is installed in a closed container made of steel and insulating cylinders. The module setup enables you to connect the reactors in series or in parallel for extending the range of voltage and/or current. The individual modules can be installed above or next to one another.
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
Benefits
Low level of partial discharge < 2 pC
Extremely high test voltages thanks to the possibility of cascading the
high voltage modules
High degree of variability of voltage and power parameters thanks
to single, series, or parallel operation of high voltage modules
Low supply power thanks to high-quality resonance reactor
Ideal sinusoidal test voltage thanks to series resonant circuit
Low noise level thanks to special mechanical design
Low maintenance operation over the entire service life of the test system