The invention discloses a high voltage isolating switch with a delayed disconnecting function. A compressed air end is connected with an air path of the high voltage isolating switch, a pantograph connecting part of the high voltage isolating switch is connected with a pantograph, a main circuit breaker connecting part of the high voltage isolating switch is connected with a main circuit breaker of a locomotive, and a disconnecting part of the high voltage isolating switch is connected with a locomotive body; a switching-off signal output end of a control diagnosis system of the locomotive is connected with a time relay coil in the high voltage isolating switch, and an external power is connected with a switching-off electro-pneumatic valve through a normally-open contact of a time relay ; a connecting point is arranged between the switching-off signal output end of the control diagnosis system of the locomotive and a pantograph-down signal input end. When the control diagnosis system of the locomotive gives out a switching-off signal, the signal is used as a pantograph-down signal to be echoed to the input end of the control diagnosis system of the locomotive. The high voltage isolating switch disclosed by the invention has the advantages that the situation that the locomotive cannot perform disconnecting switching of the high voltage isolating switch under the pantograph-up state is guaranteed through a hardware loop, and the major failure that the electric network is tripped or powered off caused by the operation of the high voltage isolating switch by mistake is avoided.
High voltage isolating switch with delayed disconnecting function
2016-02-24
Patent
Electronic Resource
English
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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