Partial Discharge Free Testing System| Detailed introduction of technical principles

SF6 partial discharge-free test transformers are devices that provide high-voltage test power to high-voltage equipment (especially GIS, transformers, cables, etc.) without partial discharge interference.

Test Principle: The core principle utilizes SF6 gas, with its high insulation strength, as the insulating medium, replacing traditional transformer oil. Inside the sealed casing, the required high voltage is generated through induction in the high-voltage winding via the excitation winding. Because SF6 gas is pure, uniform, and has a high discharge initiation voltage, the partial discharge of the transformer itself at rated voltage can be controlled to an extremely low level (e.g., ≤5pC), thus providing a high-voltage power supply with extremely low "background noise" for accurate measurement and judgment of partial discharge signals within the test object.

Application Features:
1. Extremely Low Background Interference: Essential equipment for accurate partial discharge measurement, especially suitable for type testing and quality inspection of SF6 gas-insulated equipment with extremely high cleanliness requirements.

2. Small Size and Light Weight: The insulation strength of SF6 gas is far higher than that of air and transformer oil, making the equipment compact, easy to move, and suitable for field use.

3. High stability and reliability: Sealed structure, not easily affected by environmental humidity and impurities, ensuring stable performance.

4. High requirements and high cost: Requires stringent requirements for gas purity and sealing performance; manufacturing and maintenance costs are higher than oil-immersed transformers. Typically used in laboratories or critical field tests. Partial discharge-free testing system, partial discharge-free test transformer, SF6 insulation high-voltage test transformer system AC50-1200kV. The SF6 partial discharge-free test transformer is a partial discharge-free power frequency test transformer designed, developed, and manufactured by our company by introducing and absorbing advanced foreign technology. It is widely used in manufacturers of electrical appliances, cables, motors, transformers, instrument transformers, insulation materials, and related high-voltage components, as well as high-voltage laboratories in power, scientific research, and universities. It can perform partial discharge and power frequency withstand voltage tests on their products.

1. Rated capacity 30-1000kVA (customizable)

2. Rated voltage AC 100-1200kV

3. Operating time <5min

4. No-load loss <4%

5. Load loss <9%

6. Partial discharge quantity <5PC,

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