Cable laying

Dc Wire For Solar Panels Wholesale
Photovoltaic power generation system engineering cable project construction costs are large, cable laying method directly affects the construction costs. Reasonable planning, the correct choice of cable laying method, is an important part of the photovoltaic cable design selection.

Photovoltaic power generation system cable laying method should be based on engineering conditions, environmental characteristics and cable type, number of factors such as comprehensive consideration, and in accordance with the requirements to meet the reliable operation, easy maintenance and technical and economic rationality to choose. Photovoltaic power generation system DC cable laying methods mainly have direct burial laying, through the pipe laying, bridge laying, cable groove laying and so on. AC cable laying and general power electrical engineering construction methods are similar. No matter what kind of laying in the overall wiring should be considered in advance before the direction of the line, and then begin to put the line. When the underground pipeline is arranged along the road, it is necessary to pay attention to the laying of the pipeline outside the traveling part of the road.

PV power generation system connecting cable laying precautions

(1) In the building surface laying photovoltaic cable, to consider the overall aesthetics of the building. Open wire routing should be laid through the pipe, the pipe should be horizontal and vertical, should provide sufficient support and fixation for the cable to prevent mechanical damage to the cable caused by the wind and so on. Shall not be laid in the wall and the bracket of the sharp edges of the cable, so as not to cut, wear and tear damage to the cable insulation caused by a short circuit, or cut the wire caused by a circuit breaker.

(2) cable laying wiring tension should be uniform and appropriate, too tight will be due to temperature changes in the four seasons and the temperature difference between day and night caused by cable breakage.

(3) Consider the impact of environmental factors, cable insulation should be able to withstand wind, sun, rain, corrosion, etc..

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    (4) cable joints to be special treatment, to prevent oxidation and poor contact, if necessary, tinned or soldered. The same circuit feeder and return line should be twisted together as far as possible.

(5) cable jacket color selection should be standardized, such as phase line, zero line, ground line and other colors to be distinguished. Laying in the cabinet inside the cable to be wrapped in ribbon as a whole, to achieve a neat and beautiful.

(6) The cross-sectional area of the cable to match its operating current. Cross-sectional area is too small, may make the wire heat, resulting in excessive line loss, and even make the insulation skin melting, resulting in a short circuit or even fire. Especially in the low-voltage DC circuit, line loss is especially obvious. The cross-sectional area is too large, and will cause unnecessary waste. Therefore, each part of the system cable should be selected according to the size of the respective current through the determination.