Maintenance and Performance of the Control Cable

Speaking of control cables, most people have said this kind of cable. The control cable is a kind of cable used to transmit signals, automatic control and operation functions. The material used is mainly polyvinyl chloride, which has good insulation performance and can be used in control and protection circuits with rated voltage below 450/750V. It usually used more in industrial and mining enterprises, energy and transportation sectors. And a good control cable should also have some excellent performance, so do you know what performance the control cable should have?

1. The performance of the control cable

1) Insulation performance: The industrial control cable is mainly made of polyvinyl chloride, and the voltage of 1min and 1kv between the conductors cannot break it down. Between the conductor and the shield, a voltage of 5mim 3kv cannot break it down.

2) Capacitance: The capacitance of the control cable when it is working, the average value can reach about 52f/km.

3) Defense: Under the condition of 150KHZ, the average combined power is greater than 69DB/KM.

4) Number of cores: The number of cores of the control cable is large, and its function is to use it as a cable for electrical equipment to transmit control signals. If the number of cores is large, it is possible to reach 61 cores. Generally, it can be produced according to the requirements of users.

5) Cross-sectional area: Most of the current and voltage of the control cable are relatively small, so its cross-section generally does not exceed 10 square meters.

6) DC resistance: when the temperature is 20 ℃, the 0.4mm copper wire shall be less than or equal to 148 Ω / km, and the 0.5mm copper wire shall be less than or equal to 95 Ω / km.

7) Insulation resistance: each core wire is grounded with other cores, the control cable is greater than 10000MΩ/km, and the HYAT cable is greater than 3000MΩ/km.

However, due to the different application fields of control cables, the performance requirements and standards of control cables may be different in some aspects. Therefore, we still need to comprehensively consider according to our own actual needs, so as to select suitable control cable products.

2. Maintenance of the control cable

The China control cable is a connection device that directly transmits electric energy to various electrical equipment and appliances. Grasping its performance characteristics is conducive to give better play to its work efficiency. Make a good maintenance can not only prolong the service life, but also save the cost.

Common faults in general control cable lines include mechanical damage, insulation damage, insulation damp, insulation aging and deterioration, overvoltage, and cable overheating faults. Therefore, when the above-mentioned fault occurs in the control cable, the power supply of the faulty cable shall be cut off, the fault point shall be found, the fault shall be checked and analyzed, and then the repair and test shall be carried out. The power supply can be restored after the fault is eliminated.