Yunnan cable manufacturers share the main work content of cable daily maintenance:

1.Load monitoring

By monitoring the load of the cable, you can understand the load change of the cable, control the overload of the cable in principle, and analyze the operating state of the cable. Because overload is very harmful to the cable, the load of the cable needs to be measured and monitored frequently. The load of the cable can be measured with a clamp-on ammeter, and the cable should be kept running under the specified allowable continuous current carrying capacity.

Yunnan cable manufacturers suggest that in order to prevent premature aging of cable insulation, the line voltage should not be too high, generally should not exceed the rated voltage of the cable.15%.

2.Temperature monitoring

The operation of the cable will be affected by environmental conditions and heat dissipation conditions, and local temperature will rise in the early stage of cable failure, so it is necessary to monitor the temperature of the cable.

Using various instruments to measure the temperature of cable line sheath, cable connector and other components, the purpose is to prevent the cable insulation from exceeding the maximum allowable temperature and shorten the cable life, in advance to prevent the occurrence of cable accidents.

The measurement of cable temperature should be carried out in summer or when the cable load is the largest, and the line segment with the most dense cable layout or the worst heat dissipation condition and the greatest influence by external heat source should be selected. Soil temperature shall be measured during temperature measurement of directly buried cable. The distance between the installation point of the thermocouple thermometer for measuring the soil temperature and the cable shall not be less3m.

The cold head of the new cable put into operation shall be tracked and checked by infrared thermometer, and personnel shall be arranged to tighten its conductive connection part during power failure and maintenance. As the connection of the cable cold head depends on the mechanical force such as double-headed screws to press the conductive contact surface, the working load current and fault short-circuit current all depend on the crimping surface for energy transmission, and thermal expansion and cold contraction and electromagnetic vibration may cause poor contact.

3.Small animal injury prevention cable

In recent years, there have been many accidents caused by ants biting cables, which may be ignored when laying cables. After the local residents reflect or the relevant departments report, Yunnan cable manufacturers remind to strengthen the patrol of the cable. Especially for underground cables, excavation and inspection should be carried out when necessary. When more termites are found, they should be reported to the superior immediately and treatment measures should be taken.