1. Description of partial discharge tester

Partial discharge, when the applied voltage in the electrical equipment generates a field strong enough to cause a discharge in the insulated part of the area, but does not form a fixed discharge channel in the discharge area, this kind of discharge phenomenon is called partial discharge.

2. Introduction to partial discharge of partial discharge tester

Partial discharge phenomenon mainly refers to high-voltage electrical equipment.

The electrical equipment insulation is discharged within a certain range under the action of a satisfactory strong electric field. This kind of discharge is limited to only forming a short (bridge) connection between the conductors and not forming a conductive path. Each partial discharge will have some influence on the insulating medium. The thin partial discharge has less influence on the insulation of power equipment and the decrease of the dielectric strength is slow; while the violent partial discharge will cause the insulation strength to drop quickly. This is an important factor that damages the insulation of high-voltage power equipment. Therefore, when planning the insulation of high-voltage power equipment, it is necessary to consider that under the action of long-term operating voltage, no more violent partial discharges are allowed in the insulation structure. It is necessary to strengthen the monitoring of the equipment at work. When the partial discharge exceeds a certain level, the equipment should be withdrawn from work for maintenance or replacement.

Third, the partial discharge of the partial discharge tester's impact on power equipment

When the insulation is partially discharged, the insulation life will be affected. Each discharge, the impact of high-energy electrons or accelerated electrons, especially long-term partial discharges, will cause various forms of physical effects and chemical reactions. For example, when charged particles hit the outer wall of the bubble, the insulating chemical bond may be broken and cracking occurs. , Damage the molecular structure of the insulation, constitute insulation deterioration, and accelerate the process of insulation damage.