Mode: HFRS serial Variable frequency. Voltage: 200kV - 2000kV The variable frequency resonant system is designed for 1000kV and below voltage SF6 circuit breaker, GIS, XLPE power cable and other high capacitance power equipment on-site withstand test and 1000kv and below voltage instrument transformer, coupling capacitor, zinc oxide power equipments partial discharge test. MAIN FEATURE - High Q value - Wide variable frequency range: 30-300Hz - Low partial discharge ( PD) level - Can do on-site test for 10km length 200kV XLPE power cable ( 1200 mm2)