Method for controlling high-voltage isolating switch of electric locomotive

The invention provides an electric locomotive high-voltage isolation switch control method, which comprises the following steps of: adding a pantograph isolation change-over switch for isolating a fault pantograph in each high-voltage isolation switch control circuit, and controlling the corresponding high-voltage isolation switch to act through the pantograph isolation change-over switch; the pantograph isolation change-over switch comprises operation position contacts and isolation position contacts which correspond to each other, the operation position contacts sequentially comprise a contact 5, a contact 6, a contact 7 and a contact 8, and the isolation position contacts sequentially comprise a contact 1, a contact 2, a contact 3 and a contact 4. Grounding hidden dangers caused by misoperation of the high-voltage isolation switch can be solved, pantograph-catenary faults are prevented, and normal operation of railway transportation is guaranteed. 本发明提供一种电力机车高压隔离开关控制方法，包括：在每个高压隔离开关控制电路中增加一个隔离故障受电弓的受电弓隔离转换开