Logical Relationship of Misoperation-prevention Locking of Low Voltage Side Switch and Bus Connection Switch of Transformer

In the setting of low voltage side main switch or bus connection switch misoperation-prevention locking relationship, the locking relationship between switches is often ignored. Taking low voltage side main switch and low voltage bus connection switch as examples(medium voltage side is the same), the main purpose of this article is to explain how to set the miss operation blocking logical relationship to prevent misoperation under the typical operation way of double main transformer parallel operation.