Warehouse power supply protection system

Abstract

The invention discloses a warehouse power supply protection system applied to the field of rail traffic. An interlocking circuit is arranged on a three-phase power utilization line and is used for aninput normally-open contact of a warehouse contactor and a normally-closed contact of a coil of the warehouse contactor and an auxiliary transformation contactor which are connected in series, a coilof the auxiliary transformation contactor is arranged in an auxiliary inverter, a normally-open contact of the auxiliary transformation contactor is arranged on a three-phase bus, whether the auxiliary inverter can be connected to the three-phase bus and the three-phase power utilization circuit or not can be controlled by the coil of the warehouse contactor and the input normally-open contact, the coil of the auxiliary transformation contactor obtains power by combining the interlocking circuit during external power supply, the normally-closed contact of the auxiliary transformation transformer is disconnected, the input normally-open contact of the warehouse contactor is enabled not to be closed, only one power supply mode is ensured at the same time, and the situation that various powersupplies are used for simultaneously supplying power is enabled to be prevented.

Description

technical field [0001] The invention relates to the field of rail transit, in particular to a storage power supply protection system. Background technique [0002] In order to obtain the high energy and high efficiency required for vehicle operation, rail transit vehicles often adopt high-voltage current receiving methods, the highest voltage used has reached AC 25KV, and the current has reached hundreds of amperes. The resulting impact on vehicles, equipment and personnel The hidden danger of high-voltage electric injury has always plagued the safety of vehicle design. Especially in order to facilitate the maintenance of the vehicle back to the warehouse and the special working conditions such as the long-term parking of the vehicle and serious power feeding, the vehicle has added a power supply mode for the warehouse. [0003] How to avoid the occurrence of various power supply modes at the same time, when different power sources are connected to the vehicle at the same t...

AI Technical Summary

Problems solved by technology

[0002] In order to obtain the high energy and high efficiency required for vehicle operation, rail transit vehicles often adopt high-voltage current receiving methods, the highest voltage used has reached AC 25KV, and the current has reached hundreds of amperes. The resulting impact on vehicles, equipment and personnel The hidden danger of high-voltage electric injury has always plagued the safety of vehicle design

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