What is the working principle of high frequency spark machine?

Working principle of high-frequency spark machine: Conductors with insulation layer such as wires and cables are subjected to withstand voltage test with high-frequency spark machine, the conductive core of wires and cables is grounded, and the products pass through the high-voltage electrode of high-frequency spark machine at a certain speed, so that the insulation layer is subjected to high-voltage test.

When the electrode voltage reaches a certain value (more than several thousand volts), it can be approximately considered that the air voltage on the insulating surface of the high-frequency spark machine is the electrode voltage. When there are defects, breakage, wire leakage and air holes on the surface of wires and cables, the high-voltage electrode and wire core of GS high-frequency spark machine discharge, which is equivalent to the instantaneous short circuit between high-frequency voltage and ground wire, resulting in high-voltage discharge, accompanied by sparks, which breaks through the insulation layer and achieves pinhole defect breakdown.

At present, China's GS high frequency spark machine standard mainly uses 3KHz high frequency for testing, which is suitable for the testing and acceptance of automobile wires and cables, electronic wire transformers and industrial high frequency wires and cables.

According to the spark withstand voltage test value selected at present, it has been proved in long-term production practice that it can basically achieve the same effect as the immersion withstand voltage test? .