10kV power cable common fault judgment method To determine the 10kV power cable fault problems need to do according to the fault conditions to do a simple test and determine the nature of the fault.
External damage to the cable is the most common cause of failure.
After the cable was damaged by external power failure will occur in a large area.
For example, underground pipeline construction process, the 10KV Power Cable because the construction machinery traction is too large broken.
Cable insulation, shielding damage due to excessive bending of the cable; These direct external factors will cause some damage to the cable.
Inadequate cable manufacturing process can lead to rupture of the protective layer of the cable.
Cable end joint sealing is not enough.
Cable sheath in the use of the cable pierced by the object or subject to corrosion.
These are the main reasons for damp cable insulation.
At this point, the insulation resistance is reduced, the current increases, causing power failure problems.
Long-term current effect will make the cable insulation generates a lot of heat.
If the cable insulation work in a long-term adverse chemical environment will change its physical properties, so that the aging of the cable insulation or even lose its effect, power failure will be generated.
If the power cable is in a high-current environment for a long time.
If there is impurity or aging in the line insulation and the impact of over voltage caused by external factors such as thunder and lightning, the overload operation generates a large amount of heat and the power cable may be prone to faults.
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