Usage
The variable inductance resonant test system is designed for AC voltage withstand test of SF6 circuit breaker, GIS, XLPE power cable and other high capacity power equipment of 1200kV and below voltage.At the same time, it can also be used for partial discharge test of instrument transformer, coupling capacitor, zinc oxide arrester and other power equipment of 500kV and below voltage.
Technical feature
1.Can be running in series resonant mode or single module mode(short circuit other module(s))
2.High Q value,low partial discharge level
3.Require a stand-along voltage divider for output voltage measurement
4.Require a preload capacitance(normally the voltage measurement divider)to achieve full rated voltage
5.Being available in a single range(if only one module is provided).For multiple cascaded modules,external HV bus bars can be purchased which effectively extend the tuning range of the system
Applications
1.Power cable up to 525kV
2.Power transformer up to 1000kV
3.Instrument transformer up to 1050kV(CT,VT,PT)
4.Generator
5.GIS,cable accessory
6.Bushing
7.HV capacitors
8.Other high capacity objects
System Configuration
1.Cylinder type variable inductance reactor(s)
2.Capacitive voltage divider
3.Exciter transformer
4.Power noise filter
5.Voltage regulator
6.Switchgear cabinet(optional)
7.Isolation transformer(optional)
8.Digital control&measuring system
9.Peak voltmeter
10.Compensation reactor
11.Current limit inductance/HV filter
