Causes and preventive measures of cable and bare conductor damage

Power cables and bare conductors are always damaged due to various reasons when they leave the factory. How can we better prevent and extend the service life of cables and bare wires? Below I will list five points that power cables and bare wires are prone to damage Circumstance, and protective measures.

1. Storage: It is best to store the power cables and bare conductors indoors, and at the same time lay a layer of isolation layer on the storage surface, such as wooden boards, bedding, foam, etc., to prevent the product from freezing and damp, and pay attention to preventing the product from the ground Scratch the outer skin of wires and cables by direct contact, so handle with care.

2. Unloading: When arriving at the destination or construction site, it is best for the product supplier to send personnel to supervise it to prevent rough operations during product unloading.

3. Delivery before delivery: When the overhead bare conductors or insulated cables are loaded on the transportation tool before delivery, warm and protective measures are required. For example, use enclosed means of transportation to prevent the product from being directly exposed; put a layer of soft cushion on the product, such as bedding or other soft foam, etc.; handle with care when loading, do not rough load, and avoid bending of the product Big.

4. During cable laying and installation: It is best to choose to work in the mid-afternoon temperature is warm, if possible, use heaters and other equipment to "warm up" the product in advance before use, so that the product can reach the best performance state. If it is buried in the ground, a protective layer such as cloth or foam can be laid in the cable trench in advance. If you are wearing a pipe, you must ensure that the inside and outside of the pipe are smooth in advance so that the wires will not be scratched. Special attention should be paid to iron pipes. When purchasing qualified iron pipes, there may be a large number of sharp raised points in the low-quality iron pipes, which may scratch the wire sheath.

5. Selection of low-temperature cables: The selected low-temperature cables must be tested in strict accordance with the standard requirements, placed in an environment of minus 35 ℃ for 16 hours, and then subjected to mechanical performance tests, repeated bending and flexing, and extending the insulation and sheath And the tensile test, the pass rate is 100%. Low-temperature cables have extremely strong low-temperature resistance, and the insulation and sheath skin can still be guaranteed to be crack-free and non-broken in a cold external environment.