Variable Frequency series resonance test System is designed to meet the highest standards, ensuring that it performs accurately and reliably in any application. With a wide range of resonant frequencies available, such as transformer, cable, switchgear, CT PT, GIS, Circuit breakers.
8400kVA/600kV Variable Frequency series resonance test System Tested application and requirement
1.For 400kV/2000mm2 cable 1km ACHV test,capacitance≤0.209uF,test frequency 20-300Hz,test voltage is not exceeding 420kV,test time 60min.
2,For 400kV and below substation equipment：CT,GIS,switch,Circuit breaker,bushing,test voltage ≤600kV,test time 1~15min;
Work condition
1.environment temperature：－100C –50 0C; 2.relative humidity：≤90%RH; 3.altitude: ≤1000m;
Main technical parameters and functions
1. rated capacity：8400kVA;
2. input power：three -phase 380V voltage, frequency 50Hz;
3. rated voltage：420kV, 630kV
4. rated current：20A,10A
5. working frequency：20-300Hz;
6. output waveform: sine wave
7. waveform deviation factor: Distortion rate of output voltage waveform≤1%;
8. working time: underrated load allowed continuous working 60min, over-voltage 1.1 times 1min;
9. Temperature rise：underrated load allowed continuous working 60min, after that temperature rise≤65K;
10. quality factor： Q≥30(f=45Hz);
11. defensive function: Over-current, over-voltage, and flashover protection are provided for the tested product (see frequency conversion power supply for details).
12. accuracy：System effective value 1.5;