gui chao cable news: 10kv mine cable detection method-非凡电子娱乐

for myptj type 10kv mining cables,

after partial discharge test and production process tracking,

the production process and testing methods of this kind of products are summarized,

note the following:

first，

the semi conductive shield should be adopted in the external shielding of the production process

semi conductive tape shielding metal braid shielding structure,

instead of conducting a semi conductive shielding, the metal braid shield is directly used,

a layer of outer semi conductive shielding layer is applied outside the insulating wire core,

can eliminate the embedding of the shielding insulation,

influence on discharge performance.

second, the cable end of the processing requirements.

the knife and peel stress shielding layer insulating clamp,

the shield should be in the same section and should have a transition ramp,

not to damage the insulation body, the insulating surface to the file and a clean,

there can be no residual semi conductive material, insulated wire core end portion should be trimmed,

the exposed part of the conductor shall be closely packed and cleaned with anhydrous ethanol.

test transformer oil to be pure, not water, suspended solids and other impurities.

both ends of the cable insulation shielding should be dipped into oil cup, incision of insulating oil.

the cable conductor in contact with the electrode to the full cup,

to ensure that the end of the test does not discharge.

besides，

10kv mine cable product process flow and the production process should be strictly controlled,

in particular, it is necessary to strengthen the vulcanization process, the curing time and the steam pressure,

the control of the parameters such as the take-up speed and so on, which can prevent the products from appearing in the production process

and the cable core influent the results.

finally, the production process of the insulated wire core of this kind of product should be avoided,

twisting and bending, should prevent between the conductor and the conductor shielding detachment and dislocation,

thus, the shielding performance of the conductor is reduced and the influence of the discharge index.