Oil-Insulated SF6 Gas Filled PD Free Testing Transformer .| Detailed introduction of technical principles

Partial discharge-free test transformers are key equipment providing clean test power for insulation testing of high-voltage equipment.

Test Principle: The core principle is the extremely low partial discharge (typically ≤5pC) generated by the transformer itself at rated voltage. Through the selection of high-quality insulating media (such as purified transformer oil or high-purity SF6 gas), precise design and manufacturing processes optimizing the electric field distribution, and the use of a robust shielding structure, internal discharge is suppressed to the maximum extent at its source, resulting in a high voltage output with minimal "background noise" for accurate detection and separation of the partial discharge signal from the test sample.

Application Features:
1. Extremely low background interference: It serves as a benchmark device for quantitative measurement of partial discharge, ensuring the accuracy of test results.

2. Extremely high design and manufacturing requirements: Extremely strict control over material purity, internal cleanliness, shielding, and manufacturing processes leads to high manufacturing costs.

3. Specific application scenarios: Primarily used in high-voltage electrical appliance manufacturers, quality inspection agencies for type testing, factory testing, and precision insulation diagnostics—occurring in situations requiring extremely high measurement sensitivity.

4. Core of the Measurement System: As a high-voltage power supply, it needs to be integrated with partial discharge-free coupling capacitors, detection impedance, and measuring instruments to form a complete testing system. Oil-immersed SF6 gas-insulated partial discharge-free test transformer, partial discharge-free power frequency AC high-voltage test system, partial discharge-free test transformer AC50-1200kV

Partial discharge-free test transformer, suitable for manufacturers of electrical appliances, cables, motors, transformers, instrument transformers, insulating materials, and related high-voltage components, can perform partial discharge and power frequency withstand voltage tests on their products.

Main Features:
1. Internally filled with high-insulation-strength transformer oil as the insulating medium;
2. Low partial discharge, ≤5PC at rated voltage;
3. Simple and intuitive test process, convenient and easy to operate;
4. Effectively eliminates noise interference in the power supply;
5. Adopts automatic control technology, high degree of automation, strong anti-interference ability;
6. Employs fast electronic protection devices, high reliability.

1. Rated Capacity: 50-1200kVA (Customizable)

2. Output Voltage: AC 50-1200kV, including 50, 100, 150, 200, 250, 300, 500, and 1000kV

3. Turns Ratio Accuracy: <1.5%

4. Partial Discharge Quantity: <5PC

5. Protection Functions: Overcurrent and voltage protection, alarm, automatic zeroing

6. Transformer Losses: No-load loss: <4%; Load loss: <9%

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