The induced overvoltage withstand test of transformers and instrument transformers is an important test to ensure that the quality of transformers meets national standards. The longitudinal insulation induced overvoltage withstand test of transformer windings, including inter-turn, inter-layer, inter-section, and inter-phase insulation, is a crucial item in transformer insulation testing. Due to the special nature of longitudinal insulation testing, it is necessary to apply a frequency multiplier power supply device to increase the test voltage across winding insulation, thereby achieving the purpose of the withstand voltage test.
The GDSF-81 triple frequency generator is designed and manufactured by Guodian Xigao to meet the above requirements. It has been proven by extensive user use that it is simple to operate, reliable in performance, and can effectively meet the needs of induced overvoltage withstand tests for transformers and instrument transformers.
Product Features
- Adopts a three-phase five-limb structure, with simple craftsmanship, which reduces the internal impedance and leakage flux loss of the transformer body, improving the efficiency of the generator.
- Its weight and volume are smaller than traditional three single-phase transformer groups, and it is equipped with a control box of corresponding capacity, making it convenient for on-site use.
- This product can be used as a power source for induced overvoltage withstand tests on transformers and electrical equipment of corresponding capacity, or as a 150Hz power supply for short-term operation.
Product Parameters
- Rated capacity: 5-100kVA; Input: three-phase 380V, 50Hz sine wave
- Output: 0-300V, 0-500V, 0-1000V (custom voltage available), 150Hz,
- Waveform distortion ≤5%
- Capacity: 3-150kVA
- No-load operation time: ≤5 minutes
- Load operation time: 40-60 seconds
