The insulations of transformer and generater will be deteriorated or injured and even if the deterioration proceeds to the layer short or grounding, it will be difficult to point out the insulation faults, unless the facts are recongnized from outer circumference, that the current flowing, local heating smelling, and carbonizing. Before the insulation faults extends to be recognized from the outer circumference, there is a period which the local conductivity of insulation is growing or something like pin holes are in causing. If the deterioration of insulation in earlier state is detected, exactly from the outer circumference, we will be able to study rapidly how to cope with the situation. Thus we can not only protect against the fault, but also the continuation of runing will be kept reliably. By this method, the defects of insulation may be detected by using the impulse voltage according to the impulse level of the transformer insulation.

目次のタイトル : 変圧機器絶縁劣化及び故障の検出法
CONTENTSのタイトル : Detection of insuiation deteriorations and faults of transformer