Cable service life and replacement cycle

The service life of the cable is related to the specific use, generally about 20-30 years, and it needs to be checked at any time and replaced regularly.

First, the service life of the cable

Cable is an important part of power system, and its service life directly affects the stability and safety of power system. The service life of the cable depends on a number of factors, such as material, heavy load capacity, laying method, environmental factors, etc., so the service life of different cables is not the same.

Generally speaking, the service life of low-voltage cables is short, generally about 15 years, while the service life of high-voltage cables is longer, up to more than 20 years. In some special cases, such as cable breakage, the service life will be greatly affected.

Second, Cable replacement cycle

Although the cable has a certain service life, it also needs to be monitored and maintained in actual use. After a period of use, the insulation material of the cable will age, fail, and even short circuit, leakage and other problems, need to be replaced in time to ensure the safety of the power system.

In general, power systems require regular inspection and maintenance to check the use and health of cables. Once the cable is faulty, it needs to be repaired or replaced in time. For high-voltage cables, the replacement cycle is generally about 20 years; For low-voltage cables, the replacement cycle is generally about 15 years.

Third, how to determine whether the cable needs to be replaced

To determine whether the cable needs to be replaced, multiple factors need to be considered, such as power load, laying environment, use time, cable appearance and so on. Here are some common methods:

1. Check the appearance: Check whether the cable cover is damaged or aged.

2. Resistance test: Test the resistance value of the cable to determine its insulation performance.

3. Partial discharge test: The partial discharge test is performed on the cable to determine whether the insulation aging problem exists.

4. Infrared temperature measurement: Infrared temperature measurement of the cable to determine whether there are problems such as overheating.

In short, regular inspection and maintenance of cables, timely detection of problems and replacement, maintenance, can ensure the safe and stable operation of the power system.