With the development of power systems, the capacity of operating equipment continues to increase. Thermal power generating units now exceed 600 MW capacity, while hydropower generating units have reached maximum capacities of 700 MW. Additionally, equipment such as 110KV and 220kV SF6 combined electrical equipment (GIS), high voltage cables, and coupling capacitors require AC power frequency withstand voltage testing.
Traditional test equipment (power frequency test transformers) presents significant challenges for on-site testing due to their bulky size and large capacity requirements. Power frequency resonance devices offer substantial advantages in test power capacity, equipment weight, test waveform quality, and investment efficiency.
| Parameter | Specification |
|---|---|
| Rated capacity | 360kVA |
| Input power supply | 380V, frequency: 50Hz |
| Rated voltage | 360kV |
| Working frequency | 50Hz |
| Waveform distortion rate | Output voltage waveform distortion rate ≤1% |
| Working time | 5min under rated load, 1.1 times over voltage for 1min |
| Temperature rise | ≤ 65K after continuous operation for 5min under rated load |
| Quality factor | Device itself Q ≥ 10 (F = 50 Hz) |
| Measurement accuracy | System RMS 1.5 level |


