1. The key work of power cable operation and maintenance For the operation and maintenance of power cable, it can be focused on the following four points:

The first point is to monitor the interface of the power cable, especially before the cable line is put into operation. By monitoring to ensure compliance with the installation process, problems with the intermediate structure or terminal joints of power cables due to improper installation are avoided.

The second point is to inspect the lines of the power cables. It is mainly to carry out daily inspection and inspection of the operation status of the line, to carry out regular inspection inspection of the operation state of the substation, and to carry out special inspections for power protection of important lines.

The third point is to implement anti-sabotage protection measures for power cable lines.

The fourth point is to conduct infrared temperature measurement on the power cable regularly. During the operation of the power cable, the infrared temperature measurement of the power cable is a routine work that must be done by the staff for daily inspections, and is also an essential work content for operation and maintenance.

2. Requirements for the operation of power cables The requirements for the operation of power cables for temperature. First, choose the temperature of the power cable when the temperature is the highest in summer or when the power cable is under the maximum load to test the temperature of the power cable. During the operation of the power cable, the temperature of the cable core should be controlled within the range specified by the factory. In addition, for the cross-linked polyethylene insulated cable core, the temperature should be controlled within 90 degrees. During operation, if a short circuit occurs, the maximum temperature cannot exceed 250 degrees. Because the temperature of the cable core and the outer skin are different, but under normal circumstances, the difference between the two will be controlled within 15--20 degrees. So you only need to detect the temperature of the outer skin to know the temperature of the wire core. If the temperature of the cable exceeds the allowable range during operation, the insulation material will age and the insulation performance will decrease. At this time, it is necessary to use the limited compliance method to control the current. The limited compliance method is a common method, which can reduce the temperature of the cable and improve the utilization rate of the cable. Voltage requirements for power cable operation. The voltage requirements for power cable operation are that the operating voltage of the cable cannot be higher than 15% of the rated voltage. In principle, the voltage of the power cable must not exceed the load, and even when dealing with a fault, it is necessary to ensure that the load returns to normal immediately. Treatment measures for smoke or fire in the cable line. When there is smoke or fire in the cable or the cable head, the staff should cut off the power supply at the first time, and then put out the fire. If the whole line of the cable line is tripped, it is necessary to stop the test transmission to prevent the weak insulation of the line from being easily broken down, affecting a larger range, or an accident occurs, which further increases the loss of the accident.

Huafeng is a professional brake cable supplier in China. We produce universal brake cable, parking brake cable and automobile control cables for various models. If you are interested, you can contact us and we can send you samples!