In the power system, insulation rod (or insulation rod) is an important safety tool, widely used in the operation and maintenance of high-voltage power equipment. In order to ensure the safety performance of the insulation rod, it is necessary to carry out AC voltage withstand test. In this paper, the methods and requirements of AC voltage test of insulated rod will be introduced in detail to help relevant personnel better understand and implement this important safety testing procedure.

1. The basic concept of insulation rod

Insulation rod refers to a long rod made of insulating material, which is usually used in high-voltage operations in the power industry. Its main function is to isolate the electrical contact between the operator and the power supply to ensure safe operation in high pressure environments. Insulating rod materials usually include glass fiber, plastic, etc., with good insulation properties and mechanical strength.

2.The purpose of AC withstand voltage test

The main purpose of AC voltage test is to test the insulation performance of the insulation rod under high voltage to ensure that there will be no breakdown or leakage phenomenon in actual use. Through the test, the defects, aging or damage of the insulation materials can be effectively identified, so as to improve the safety of the use of the insulation rod.

3.Test equipment and preparation

When performing AC withstand voltage tests, the following equipment and materials need to be prepared:

1. Voltage test equipment: including high voltage generator, measuring instruments (such as voltmeter, insulation resistance meter, etc.). 2. Insulation rod sample: The number and specifications of the insulation rod to be tested should meet the relevant standards. 3. Safety protection equipment: such as insulation gloves, goggles, etc., to ensure the safety of operators.

Before the test, the test equipment should be verified to ensure its normal operation. At the same time, the test environment should be kept dry and clean to avoid the impact of moisture and pollution on the test results.

4.Ac withstand voltage test method

1. Test preparation: – Fix the insulation rod on the test bench to ensure its stability. – Connect high voltage test equipment to ensure solid connection and avoid leakage.

2. Test steps: Boost voltage: slowly increase the output voltage of the high-voltage test equipment, usually starting from 0V, and rising to the test voltage every minute. The test voltage is generally 2-3 times the rated voltage of the insulation rod, and the specific value should be determined according to the relevant standards. – ** Hold voltage ** : After reaching the test voltage, hold the voltage for a certain time (usually 1 minute) to observe the performance of the insulated rod. Depressurization: After the holding time is over, slowly depressurize to 0V to avoid electric shock or equipment damage caused by instantaneous power failure.

3. Record data: – Record the voltage value, time and any abnormal phenomenon (such as leakage, breakdown, etc.) at each stage of the test process. – At the end of the test, use the insulation resistance meter to measure the insulation resistance value of the insulation rod to evaluate its insulation performance.

5. Test requirements

1. Test voltage: The test voltage should be selected according to relevant standards to ensure that it is 2-3 times higher than the rated voltage of the insulation rod. 2. Test time: The time to maintain the test voltage is generally 1 minute, and the specific time should meet the standard requirements. 3. Safety measures: safety procedures should be strictly followed during the test to ensure the safety of the operator.

6. Evaluation of test results

After the test, the recorded data should be analyzed. The qualified insulation rod should not have leakage, breakdown and other phenomena during the test, and the insulation resistance value should be within the specified range. If there is an abnormal phenomenon, the test should be stopped immediately, and the insulation rod should be inspected and evaluated, and scrapped if necessary.
The AC voltage withstand test of insulated rod is an important link to ensure the safety of electric power operation. Through the standard test method and strict test requirements, the insulation performance of the insulation rod can be effectively identified and the safety risk in power operation can be reduced. It is hoped that this paper can provide a valuable reference for the relevant personnel, and help us to better implement the voltage test of the insulation rod to ensure the safety and stability of the power system.