Explore the direction of protecting the transformer power parity method

Power transformer protection is an important direction of backup protection of transformers. As adjacent components and the internal fault transformer backup protection plays an important role in preventing the expansion of the scope of the failure to ensure the safe operation of the system. Primary and secondary wiring secondary wiring, voltage transformer secondary wiring and protective devices has its  electric meter  relationship correctness, and current transformer, which in actual operation, it is easy due to the wiring polarity errors The misoperation or refuse to move. This paper attempts to explore the direction of power protection, summed up in a simple and reliable method of calibration. The results show that by  air circuit breaker the actual failure of the power system, combined with CT, PT wiring polarity analysis can simply and reliably protect the correctness of power direction direction can be tested, given the equipment acceptance and routine inspection work, which greatly simplifies the work amount.