Strengthen the protection of the annual protection of the transformer and the protection of the value of protection to protect the management of the work to ensure that the correctness of the action to prevent the failure due to the protection of the damage caused by damage to the transformer, scientific and reasonable calculation of protection settings, Dead zone ", quickly cut off the fault current flowing through the transformer. For example, for the transformer overcurrent protection (backup protection), should be shortened the action time, to meet the next level with the protection of the selective conditions, the shorter the better, against the external short-circuit strength of the transformer or the impact of short-circuit Deformation of the transformer, for the system after the short circuit trip automatically forced or forced to put into operation, should see its unfavorable factors. Therefore, the automatic reclosing of the near-area overhead lines (eg within 2 km) or cable lines should be canceled according to the probability that the short-circuit fault can be automatically eliminated, or the closing interval should be extended as appropriate to reduce the reclosing Hazard, and try to check the short-circuit trip transformer. Otherwise it will sometimes increase the degree of damage to the transformer, or even lose the possibility of re-repair.
