Door Hardware Accessories,Door Lock Cylinder,Lock Body Set With Key,Profile Mortise Lock Body Wenzhou Shenghong Metal Products Co.,Ltd , https://www.shenghonglock.com
When installing the cable in parallel with the heat pipe, keep a distance of 2m, and keep 0.5m when crossing.
When the cable is installed parallel or crosswise to other pipes, it must maintain a distance of 0.5m.
When the cable is directly buried, the depth of 1-35KV cable buried directly is not less than 0.7m.
10KV and below cables installed in parallel, the mutual distance of not less than 0.1m, 10-35KV not less than 0.25m; cross-mounted distance of not less than 0.5m.
Cable laying temperature not lower than 0 °C, bending radius: multi-core cable ≥ 15 (D + d), single-core cable ≥ 20 (D + d), (D is the cable diameter, d is the conductor outer diameter).
6KV and above cable connectors:
1When installing the cable terminal, the semiconductor layer must be stripped, the insulation must not be damaged during operation, the unevenness of the knife marks should be avoided, sanding should be used if necessary; the ends should be flat, and the graphite layer (carbon particles) should be placed. Clear it clean.
2 Plastic insulated cable ends Copper tape and steel reed must be well grounded, and this principle should be followed for short-circuit, to avoid induced electromotive force at the end of steel reed when the three-phase unbalanced operation is running, and even accidents such as “fire†and burning jacket. Grounding leads require the use of my tinned braided copper wire, and the use of ferrochrome tin soldered connections with the copper cable, not suitable for torch welding, so as not to burn insulation.
3 The three-phase copper strips shall be connected to the ground wire respectively. Note that the grounding wire and the steel wire grounding wire should be led out separately and insulated from each other. The position of the welding ground wire should be as low as possible.
The basic requirements for cable ends and intermediate joints: a. good conductor connection; b. reliable insulation, recommended radiation cross-linked heat-shrinkable silicone rubber insulation material; c. good sealing; d. adequate mechanical strength, can adapt Various operating conditions.
The cable ends must be protected against corrosion by water and other corrosive materials to prevent breakdown due to deterioration of the insulating layer caused by water trees.
The cable must be loaded and unloaded by cranes or forklifts. It must not be transported horizontally and laid flat. When installing large cables, the cable car must be used to prevent the cables from being damaged by external forces or being scratched by manual dragging.
If the cable cannot be laid in time for some reason, it should be stored in a dry place to prevent sunlight from exposing it to the sun and water from the end of the cable.
Note: The installation personnel of wire and cable should be familiar with the performance of wire and cable installation personnel or full-time technicians. If there are still unclear matters, please consult the relevant technical department or the technical department of our factory.
Power cable installation considerations
Power cable installation considerations