At present, the main evalsuation standard for the waterproof performance of deep water and electricity connectors is based on the IP waterproof grade standard. What is the waterproof performance of the deep water and electricity connector? Mainly looking at the last two digits of IPXX, XX, where D and X are from 0 to 6, and Z has a higher level of 6; The second number is from 0 to 8, with a high level of Z being 8; So the Z high waterproof level of the deep water and electricity connector is IP68.

Molded cable accessories are mainly used on direct waterproof joint joints of cross-linked cables of 35kV and above. It is a joint formed by wrapping irradiated or chemically crosslinked polyethylene film tape around the treated cable joint, pressing it with a specialized mold (aluminum mold or heat-resistant tension tape), and heating it to shape.

During the production process of irradiated cross-linked polyethylene tape, it is pre stretched (stretched by 30% at 100c, then cooled and cut into rolls), wrapped into joints, and heated back to compress the interlayer air gap of the wrapped tape, thereby increasing the discharge voltage of the air gap. This type of joint has a high level of partial discharge and is suitable for making cable joints with higher voltage levels.