Power-frequency withstand voltage test on 1000kV gas bushing
| Main Facilities | Outline |
|---|---|
| UHV AC Test Hall | Dimensions of hall:40m x 40m x 30m h. Double-shielding system by expanded iron netting(Electromagnetic shielding effect:75dB at 1MHz) Auxiliary equipment:AC high voltage transformers, 2m diam. shape gap, Spray nozzle set, 3mf x 5mh. oil tank |
| AC 1650kV High Voltage Source | Transformers:550kV, 500kVA, 3 units in cascade connection, corona free up to 1000kV, with reactor for compensating capacitive load. Power source:400kVA synchronous generator. |
| DC 500kV High Voltage Source | Type:Delon-Greinacher circuit by using silicone rectifiers. Rated voltage:500kV. Rated current:30mA. |
| Corona Noise Instrument | Coupling capacitors:2000pF(500kV), 1000pF(1000kV) Radio noise meters:NEMA type meter, CISPR type meter. Partial discharge measuring instruments:ERA III type, ERA-803 type. |
