1. Decrease The Usage Of The Cable
Why will it happen?
– After a long time operation of the cable,especially the buried directly, into the water,exposed in the air or the corrosion environment,
– The thinnest point’s insulation level and mechanical level of the sheath would be go down because of the long time corrosion by the outside things.
– Routine Test Of the sheath or Circuit Ground Connection Breakdown,The thinnest point maybe breakdown.
Thus, the protective effect of the cable sheath will be lost.
Except that,Internal Consume of the cable also can not be ignored,long time electrify status will make much more heat,it also will break the conductor and sheath.
Why? Because Conductor Permitted Operation Temperature is 70℃ ，Longtime working temperature should not be over 65℃
2.Increase The Difficulty Of Cable Laying
If the thickness of sheath is too big,it will increases the difficulty of the cable laying.
Why? Because with the development of the global industry, High Voltage Electrical Cable must keep the diameter small as per more and more environmental requirement. It should be left space or gaps on the process of cable laying,then the heat of the cable will be sent out.
So that the sheath thickness should be comply with relatated Standard,otherwise the sheath can not have the production function of cable.
According to the simple analysis above, we can learn that the quality of the cable is good or bad, the first important characteristic is the appearance of the cable, no matter which cable, on the process of the production and appearance of the cable must be pay attention to. By the strict quality control and inspection.
Sheath is the appearance of the cable,the requirement of the cable’s appearance is
– Smooth and Round
– Gloss uniformity
– Wire Core Centered
– No Mechanical damage
– No Flattening
– Without the sundaries,bubble, sand hole, obvious granule and so on
As all we known, the function of the cable sheath is protect the insulated cores from damage under the action of external force.If the cable sheath thinnest point can not reach the requirement of the standard,the sheath will be broke easily.
Summary: Only by operate the cable production equipment carefully, control the sheath thickness as per the cable standard,then the best quality cable can be provided.
and that ,this also can help our factory save the resource and raw material,also can increasing the returns.