Cable aging reason to know how many dianlan P cable aging is a common problem in your life, then you know the cause of the cable aging and what is the harm to us?
Cable aging reasons: external injury.
By analyzing the operation of recent years, the rapid development of economy, especially in the pudong district of Shanghai, now a considerable number of cable fault are due to mechanical damage.
For example, non-standard installation cable laying construction, easy to cause mechanical damage;
Engaged in civil construction of the underground cable can easily run in cable damage.
Up if the injury is not serious, sometimes months or even years will lead to the injured area, form a complete breakdown failure, sometimes can cause serious damage, may occur fault, direct impact on the electric power production safety, 'outfitting J and electrical unit.
Why aging: insulation be affected with damp be affected with damp.
This kind of situation is very common, usually occurred in underground cable or exhaust pipe joint.
For example: production in wet weather conditions not qualified cable joint to joint, with water or steam, water, tree long time R electric field mixed together, damage the cable insulation strength and cause failure.
Ageing: chemical corrosion.
Cable directly into effect in the field of the acid and alkali, often due to prolonged exposure to chemicals or electric corrosion caused by armoured cable, lead or outer sheath, corrosion protective layer of the corrosion, thus fault in the protective layer insulation is reduced, can lead to cable fault.
Author: cable serious corrosion of the equipment (
The reason of aging: long-term overload.
Overload operation, due to the current, the heating effect of the load current through the conductor cable inevitably lead to a fever, and eddy current loss and skin effect charge steel armor, dielectric loss at first glance will generate an additional heat dissipation, so that the cable temperature.
Long-term overload operation, the high temperature will accelerate insulation aging, and the breakdown of the insulating material.
Especially in the hot summer, the temperature of the cable often lead to weak, the first cable insulation breakdown, so in the summer, cable fault is particularly high.
The reason of aging: cable joint failure.
Cable connector cable is the weakest link, direct negligence of staff (
Construction of bad)
Caused by frequent cable joint failure.
Construction workers in the production of cable connector, connectors, pressure if there is not tight, the original network, such as insufficient heating will cause cable insulation layer, in order to reduce the head, cause an accident.
Why aging: environment and temperature.
Heat from the cable and the external environment could lead to a high temperature resistant cable, insulation breakdown, fire or explosion.
Cable aging is one of common problems, but most of them turn a blind eye, this is a dangerous behavior, will bring our personal safety hidden trouble, so we found the cable aging problem to take the appropriate measures in a timely manner.
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