Partial Discharge Power Frequency AC High Voltage Test System | Test Precautions?

Partial Discharge-Free Power Frequency AC High Voltage Test System/Oil-Immersed Partial Discharge-Free High Voltage Test Device - Test Precautions? The following are the test precautions for the oil-immersed partial discharge-free high voltage test device:

I. Detailed Preparation Before the Test

1. Check Oil Level and Quality: Confirm that the transformer oil level is within the standard range, the oil is transparent, and there are no carbon deposits or suspended matter. If the oil quality is deteriorated or the electrical strength is unqualified, it needs to be replaced or filtered.

2. Reliable Grounding: The device casing and grounding terminals must be securely connected to the grounding grid using conductors with sufficient cross-sectional area. The grounding resistance must meet the requirements, ensuring the first line of defense for personal safety.

3. Environment and Cleanliness: Ensure the test environment is dry and clean to prevent surface contamination from causing creepage. Check that bushings and other insulating surfaces are free of dust and moisture.

4. Equipment Status Confirmation: Check that the equipment has no oil leaks, and that all components are securely connected, especially the high-voltage output leads, which should be reliably connected.

II. Standardized Operation During the Test

1. Correct Wiring: Correctly connect the high-voltage leads, measuring lines, and control box. 1. Ensure the test sample is securely connected to the high-voltage output terminal, away from surrounding grounded objects, and maintain a sufficient safe distance.

2. Smooth Voltage Increase: Turn on the power and increase the voltage steadily from zero, closely observing instrument readings and equipment status. If a breakdown sound, sudden change in indicator readings, or abnormal internal noise occurs, immediately and quickly reduce the voltage and disconnect the power.

3. Monitor Partial Discharge: As this is a partial discharge-free device, the partial discharge level should be monitored synchronously using the matching partial discharge detection system during the test. If an abnormal increase in partial discharge is detected, even without breakdown, the test should be stopped and the cause investigated.

4. Prevent Overvoltage: After the test, the voltage regulator should be returned to zero at a steady pace before disconnecting the power.

III. Safe Post-Test Conclusion

• After power is cut off, a dedicated discharge rod must be used to thoroughly discharge the test sample and the high-voltage terminal. During discharge, resistance discharge should be performed first, followed by direct short-circuit discharge to protect the equipment insulation.

Summary: Rigorous preliminary checks, standardized operating procedures, and special attention to oil quality and partial discharge levels are crucial for ensuring test safety and accurate results. The MS-YDJW oil-immersed partial discharge-free high-voltage testing device is suitable for manufacturers of electrical appliances, cables, motors, transformers, instrument transformers, insulating materials, and related high-voltage components. It 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 testing process, convenient and easy to operate;

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