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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:
1 When installing cable terminations, the semiconductor shielding layer must be stripped and the insulation must not be damaged during operation. The uneven marks should be avoided. Sanding should be used if necessary. The shielding ends should be smooth and the graphite layer (carbon) must be removed. Grain) Clean.
2 The copper tape shield and the steel file must be well grounded for the plastic insulated cable end. This principle should be followed for the short circuit, to avoid induced electromotive force at the end of the steel crucible during the three-phase unbalanced operation, even accidents such as “flashing†and burning the sheath. . 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 belt shields shall be connected to the ground wire separately. Note that the shield grounding wire and the steel wire grounding wire shall be led out separately and insulated from each other. The position of the welding ground wire shall 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.
2, using the properties of the cable laying and operating conditions <br> <br> rated voltage 0.6 / 1KV PVC insulated cable conductor power cables ①Working temperature: ≤70 ℃
2 when the short circuit (maximum duration does not exceed 5S) the maximum operating temperature of the cable: 160 °C
3 After the cable is laid, it is subjected to DC voltage 3.5KV/15min without breakdown.
4 Laying in air a. Center distance when single-core cable is laid in parallel: 2 times of the cable diameter of 185mm2 or less: 240mm2 or more is 90mm
b. Ambient temperature: 30°C
c. Download rate correction factor for different ambient temperatures:
5 Direct laying a. When the single-core cable is not connected with the angle, the center distance is 2 times the cable diameter.
b. Ambient temperature: 25°C
c. soil thermal resistance coefficient: 1.0K·m/W
d. buried depth: 0.7m
e. Download the flow correction factor for different ambient temperatures:
Rated voltage 35KV and below XLPE insulated power cable 1 Cable conductor long-term allowable working temperature: ≤90°C
2 when the short circuit (maximum duration does not exceed 5S) the maximum operating temperature of the cable: 250 °C
3 Laying in the air a. The center distance when the single-core cable is laid in parallel: 185mm2 and below is twice the cable diameter: 240mm2 and above is 90mm
b. Ambient temperature: 40°C
4 Direct laying a. When the single core cable is laid without contact, the center distance is 2 times the cable diameter b. Ambient temperature: 25°C
c. soil thermal resistance coefficient: 1.0K·m/W
d. buried depth: 0.7m
Tianjin Cable Plant Rubber Cable Factory
Ultra Plantâ„¢ Grow Light is combined our advanced All-In-One technology with patented optical design and customized light full spectrum supported from our experienced LED engineers, plant specialists and other partners working on horticulture.
Ultra Plantâ„¢ is the most versatile horticultural grow lighting fixture for indoor plants with flexible full spectrum, brightness control and uniform, wider light distribution, suitable for top lighting of all types of crops. No matter it applies to anywhere for any crop, Ultra Plantâ„¢ can do perfect work for you.
1, the power cable installation considerations <br> holding distance when <br> 2m cable installation with parallel heat pipes, the cross should be kept 0.5m.