| Three-Frequency Test Transformer Device |
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Designed according to China's standard "GB311.1 - 97", this electromagnetic three-frequency induced voltage withstand test device is planned to meet the frequency multiplication induced voltage withstand test requirements of high-voltage transformers or instrument transformers in power systems. It can perform induced voltage withstand tests on the inter-turn, inter-layer, inter-section, and phase-to-phase insulation of transformer or instrument transformer windings. This product is widely used for instrument transformers, transformers, generators, and other power equipment of various voltage levels.
Adopting a three-phase five-limb structure, the core operating flux density is selected above the saturation flux density, so that the vector sum of the fundamental electromotive force (positive sequence vector) in the secondary winding connected in an open delta is zero, while the same-phase 150Hz third harmonic (zero sequence) appears at the open ends.
Product Introduction
Equipped with special filters and multi-gear adjustable compensation inductors, the voltage waveform distortion under different loads is less than 5%, and the input side power supply is relatively reduced, making the test bench smaller in size and lighter in weight.
Simple operation, reliable performance, and can well meet the needs of induced voltage withstand tests for transformers and instrument transformers.
The entire device adopts integrated and split designs, making operation more convenient and transportation easier.
Technical Specifications:
1. Input voltage: 380V 50Hz sine wave
2. Output voltage: 500V (customizable according to parameters) 150Hz waveform distortion ≤5%
3. Output capacity: 3KVA, 5KVA, 10KVA, 20KVA (can be customized according to customer needs)
4. No-load working time: ≤5 minutes
5. Load working time: ≤5 minutes
Working Conditions:
1. Altitude: ≤1000m
2. Ambient temperature: -10 -- +40℃
3. Relative humidity: ≤95%
4. No water vapor, corrosive gases, or explosive media around.
Note: The above information and technical parameters are compiled and released by Yangzhou Dari Electric Co., Ltd.
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