Ac Resonant Test System For Xlpe Cable Withstand High Voltage Field Hipot Testing

AC Resonant Test System for XLPE Cable Withstand High Voltage Field Hipot Testing.
FRST series variable frequency resonant test systems use HV reactors with fixed inductance, work by making reactors and capacitive test objects in series resonance by adjusting frequency of power supply to output pure sine wave AC voltage, typical frequency range is 20~300Hz.
FRST series HV reactors, main part of the system, are of oil insulation and epoxy glass-fiber insulating shell, module type and stackable, serial connect for higher voltage, parallel connect for larger current, voltage up to 2400kV.
These systems are ideal for field commissioning test of power cables and GIS/GIL.
AC resonant hipot test systems are mainly used to output AC voltage for high voltage routine, type and development testing of capacitive test objects. These systems exert the principle of series resonance, as per f=1/2I a LC, the connection of HV reactors (inductance L) to a capacitive loads (capacitance C) form an oscillating circuit with the frequency (f) of power supply.
Compared to conventional AC test transformers, the relatively lower power required (1/Q), smaller dimension and lighter weight favor these systems as the most practical for field testing, and large capacitance loads.