How to choose the cross-sectional area of the power cable
The choice of the cross-sectional area of the power cable is related to the investment, the loss and voltage quality of the line, and the service life of the cable. If the cross-sectional area of the power cable is too small, the voltage quality will drop, the line loss will be too large, and the initial investment will be too high. Therefore, the appropriate cross-sectional area should be selected according to the load prediction results and the development plan, so that the power cable can meet the cable core temperature requirements and voltage drop requirements under the maximum working current, and the thermal stability requirements under the action of the maximum short-circuit current. Due to the high difficulty and low accuracy of load forecasting, when selecting the cable cross-sectional area, it is necessary to meet the requirements of 'Technical Guidelines for Urban Medium and Low Voltage Distribution Network Transformation' and 'Urban Power Network Planning Guidelines'
When selecting power cables in a three-phase four-wire low-voltage power grid, the selection of the cross-sectional area of the zero line should also be considered. In a public low-voltage network, due to the great influence of user factors, the three-phase load balance is difficult to control. In order to improve the voltage quality and reduce the Line loss, the cross-sectional area of the zero line should be the same as the cross-sectional area of the phase line.
​Henan Qingzhou Cable Co., Ltd. belongs to Henan Qingzhou Group. A comprehensive enterprise specializing in the research, manufacturing, production, sales and service of wires, cables and refractory materials. Products include overhead bare conductors, overhead insulated cables, PVC/XLPE armored/non-armored power cables below 36kv, wires, concentric service cables, control cables, construction wires and cables, solar/photovoltaic wires and cables, etc.
At the same time, we sell ADSS, OPGW, OPPC cable fittings (tension clamps, suspension clamps, optical cable joint boxes, etc.), medium and low-voltage overhead insulation cable accessories, substation fittings and insulators, overhead transmission line fittings and insulators, etc.
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