Insulation Testing After Replacing The Insulating Contact Box
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Insulation Contact Box The three-phase busbar was tested again with the insulation resistance tester at the same gear. Phase A: 377GΩ, Phase B: 3.2GΩ, Phase C: 470MΩ. Although the insulation meets the requirement of not less than 50MΩ, the insulation of phases B and C is obviously lower than that of phase A, especially the low insulation of phase C, which is not conducive to the safe operation of the equipment. The technicians initially judged that it was caused by condensation in the busbar insulation heat shrink tube, and suggested purchasing high-voltage insulation heat shrink tube to replace the damp part of the busbar insulation heat shrink tube.
