1. cable: cable end should be sealed off, whether it is piled up or laying shall be sealed by plastic, prevent moisture penetration.
2. after the wire laying, the cable head must be made in time.
3. buy Cable: must choose the excellent quality of the manufacturers: due to the insulating impurities in the pores, is the starting point of water tree occurs, thus the quality of cable to prevent water treeing is crucial.
4., strengthen the cable head production process management: once the cable water inlet, the earliest breakdown phenomenon is often cable head, so the wire head is well produced, you can extend the overall life of the cable.
5. using the cable head: cold shrink silicone rubber cable accessories of 3M company, the manufacture is simple and convenient, without a blowtorch, do not solder.
6. after the completion of the test cable of the cable, do a high voltage DC leakage test before putting into operation. After that, make a preliminary test of the outgoing cable of the substation, and other cables are not tested. Therefore, we must pay attention to the VGA line in the daily use of some security matters, everything in order to security as the center,