AC power frequency withstand voltage tester

1、 Function Description

AC power frequency withstand voltage testerApplied to electrical manufacturing departments, power operation departments, research institutions, and higher education institutions. The power frequency withstand voltage test device is divided into two types: integrated devices (below 30kV) and split devices. The control box (platform) is composed of a contact type voltage regulator (electric column voltage regulator above 50kVA) and its control, protection, measurement, and signal circuits. It is connected to a 220V or 380V power supply, adjusts the voltage regulator (i.e. the input voltage of the test transformer), and connects to a high-voltage test transformerThe primary winding is used to obtain the required test high voltage value based on the principle of electromagnetic induction.

1、 Main purpose

1. AC voltage withstand test of 6kV-500kV high-voltage cross-linked cable

2. Power frequency withstand voltage test of 6kV-500kV transformer

3. AC withstand voltage test for GIS and SF6 switches

4. AC voltage withstand test of generator

5. AC withstand voltage test for other high-voltage electrical equipment such as busbars, bushings, and transformers.

2、 Experimental steps

The layout of experimental equipment should have sufficient safety distance around people. Try to avoid placing equipment and applying high voltage leads in personnel corridors as much as possible.

Install fences and hang "Stop, High Voltage Danger" signs at the test site.

High voltage leads in the experiment should have supporting or traction insulation materials. There should be a safety supervisor to prevent anyone from approaching or passing underneath.

It is best to keep the microampere meter at a high position in the DC high voltage test. In addition to the shielding box, there should be an overcurrent automatic protection device to prevent the meter from burning out in case of sudden breakdown, short circuit or discharge.

Power frequency withstand voltage test: Please pay attention to verifying whether the equipment capacity is sufficient and avoid resonance.

The working ground wire (high voltage tail, stabilizing capacitor terminal ground wire) and the protective ground wire (operating box shell) should be connected separately and have good grounding performance.

If there is irregular swinging of the power supply during the experiment (such as welding), it will inevitably affect the stability of the high-voltage output. At this time, the experiment should be stopped to find out the cause and eliminate it.

The requirements for climate (temperature, humidity) in the experimental work should comply with the requirements of the experimental regulations and be recorded.

The high-voltage testing work must strictly comply with the relevant provisions of the safety work regulations issued by the Ministry of Energy.

3、 Technical indicators