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Standard and quality requirements for paper packaging

2017/3/27      view:
    1, the implementation of standards: GB/T7673-2008 paper wrapped copper flat wire
    2, quality requirements: tape to be tight, uniform and smooth around the conductor, should not be missing, should not wrinkle, crack, tape overlap seams shall not be exposed, tape joints and insulation repair allows the insulating layer thick, but the length is not greater than 500mm. If there is a lack of layer in the production process, cracking will affect the insulation performance of the paper envelope, resulting in partial pressure is not enough, discharge, causing the transformer breakdown, explosion. However, if the thickness of the insulation is too thick, the size of the outer part of the transformer is too large, and the size of the whole winding transformer is too large