Middle breakdown of high voltage cables: Cables rarely break down from the middle. If they break down from the middle, they may be caused by the following reasons:
2. High voltage cables are gradually aging under normal use. The main reason is the irradiation and oxidation of ultraviolet radiation, heating and so on. The mechanical strength and elasticity are reduced, the surface is covered with different cracks in the deep line, which not only reduces the effective thickness of the insulation layer, but also makes the electric field strength at this place relatively enhanced.