A self-locking relay to realize automatic alternate operation circuit with dual main breaks

Abstract

The invention discloses a circuit capable of achieving double-main-breaker automatic alternate operation by utilizing a latching relay. The circuit comprises a main breaker switch-on and switch-off command switch, a state switching change-over switch, the latching relay, a first main circuit breaker and a second main circuit breaker. The main breaker switch-on and switch-off command switch is connected with the state switching change-over switch, and the state switching change-over switch is connected with the first main circuit breaker and the second main circuit breaker through the latching relay. According to the circuit, the special latching relay and the change-over switch are additionally arranged in control circuits of the two circuit breakers, and when the two circuit breakers are normal, the latching relay alternates automatically to send switch-on and switch-off commands to the first main circuit breaker and the second main circuit breaker according to switch-on and switch-off commands of circuit breakers of input ends of the control circuits; when one of the main circuit breakers breaks down, the control circuits only send the switch-on and switch-off commands to the other main circuit breaker, and therefore the functions of alternate operation and backup for each other of the two main circuit breakers are achieved.

Description

technical field [0001] The invention belongs to the technical field of circuits, and in particular relates to a circuit that uses a self-locking relay to realize automatic alternate operation of double main breaks. Background technique [0002] The main circuit breaker of the locomotive is responsible for the high-voltage connection and breaking functions between the catenary and the electrical appliances of the locomotive. Whether the main circuit breaker of the locomotive can work normally will directly determine whether the locomotive can run normally. Once the main circuit breaker fails, it will directly lead to locomotive machine breakage or machine failure, which directly affects the safe operation of the locomotive. At present, since the main circuit breakers of the original locomotive design are vacuum circuit breakers driven by compressed air, only one installation window for the main circuit breaker is reserved on the car body. Contents of the invention [0003]...

AI Technical Summary

Problems solved by technology

Once the main circuit breaker fails, it will directly lead to locomotive machine breakage or machine failure, directly affecting the safe operation of the locomotive

At present, since the main circuit breaker designed by the original locomotive is a vacuum circuit breaker driven by compressed air, only one installation window for the main circuit breaker is reserved on the car body

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