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Installation points of Heat shrinkable straight through joint

2023-03-22
In the process of installation of heat shrinkable cable accessories, the installation and construction of the Heat shrinkable straight through joint of the cable is a relatively weak link. Although the current power system has given great attention to the fault of the Heat shrinkable straight through joint, there are still some problems to be improved in the installation and operation.

1. Processing of internal semiconductor shield

All the cable body has an inner shield layer, in the production of the Heat shrinkable straight through joint must be restored pressure nozzle conductor part of the joint inner shield layer, the cable's inner semiconductor shield should be set aside a part, so that the connecting pipe on the connection head of the inner shield can be connected to each other, to ensure the continuity of the semiconductor, so that the joint nozzle field strength evenly distributed.

2. Processing of external semiconductor shield

External semiconductor shield is a semi-conductive material that plays a uniform electric field outside the insulation of cables and joints. Like internal semiconductor shield, it plays a very important role in cables and joints. The external semiconductor ports must be neat and uniform, and the smooth transition with insulation is required, and the semiconductor tape is wound at the junction and the semiconductor shield outside the cable body is connected.

3. Metal shielding and grounding treatment

The function of metal shield in cable and Heat shrinkable straight through joint is mainly used to conduct cable fault short-circuit current and shield electromagnetic interference to adjacent communication equipment. In running state, metal shield is at zero potential under good grounding state. When the cable failure, it has the ability to conduct short circuit current in a very short time. The grounding wire should be welded reliably, and the metal shield and armored belt on both ends and the cable body should be welded firmly.

heat shrinkable straight through joint

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