Precautions on Storing and Transporting Electrical Power Cable

1. About the electrical power cable

The electrical power cable is a kind of cables used to transmit and distribute electrical energy. The electrical power cable is often used in urban underground power grids, power station lead-out lines, internal power supply in industrial and mining enterprises, and underwater transmission lines across rivers and seas. In power lines, the proportion of cables is gradually increasing. Electrical power cable is a cable product used to transmit and distribute high-power electrical energy in the main line of the power system, including various voltage levels of 1 to 500KV and above and various insulated electrical power cables.

2. Precautions: the storage and transportation of the electrical power cable on shelves

(1) When storing, first of all, it is forbidden to contact with acidic, alkaline, and corrosive substances, and separate storage is required. The insulated electrical power cable should be stored in a dry and ventilated warehouse. The suitable temperature in the warehouse is 5 to 3030°C, and the relative humidity should not exceed 75%. The glass on the sunny window of the warehouse should be painted with white paint to avoid direct sunlight and premature aging of the insulation layer.

(2) There shall be no harmful gas that can damage the insulation layer or corrode the conductor metal around the storage site of electrical power cable.

(3) Avoid storing it in the open air to prevent accidental damage.

(4) Small batches of wires can be stacked on the shelf, and the stacking height should be 5 to 10 rolls. Large quantities of wires can be stacked into plum-shaped ventilated circular stacks. The single-core electrical power cable can be appropriately stacked high. The stacking height can be 2 meters in spring and winter, and 1.5 meters in summer and autumn. When stacking, sleepers should be placed under the pallet and flat wooden boards should be laid on the sleepers. Two layers of moisture-proof paper should be added, and good ventilation should be maintained. During the storage process of the electrical power cable, stacks transfer should be conducted once every 3 months, and the upper and lower layers should be replaced and stacked to prevent long-term compression and deformation of the lower layers. Always check that the sealed packaging of the electrical power cable is intact during storage.

(5) The storage period of electrical power cable is subject to the date of delivery of the product. Under normal circumstances, the storage period should not exceed one and a half years, and the longest should not exceed two years. During the storage process, we should always pay attention to the changes of temperature and humidity. If the temperature in the warehouse exceeds 30 ℃, cooling measures should be taken immediately. If the relative humidity reaches 75% for 3 consecutive days, use a desiccant or take other measures to absorb moisture and reduce humidity.

(6) It is strictly forbidden to drop the electrical power cable from a high place during transportation to avoid cracking of the insulation layer and sheath layer, and avoid damage to the electrical conductivity and mechanical properties of the electrical power cable.

(7) During the hoisting operation, it is strictly forbidden to hoist multiple coils of the electrical power cable at the same time. On vehicles, ships, and other means of transport, the electrical power cable must be laid flat, and should be properly fixed to prevent mutual collision or overturning, and avoid damage to the outer layer or inner structure of the electrical power cable.