A static power supply cabinet circuit

Abstract

The invention discloses a circuit of a static debugging power cabinet. The circuit applied to maintenance of urban rail vehicles comprises a power module, a master circuit and a control circuit. The master circuit comprises a disconnector, a busbar fuse, an electromagnetic contactor and a direct-current quick breaker which are connected in series. The control circuit connected with the power module comprises a switch branch, a control branch connected with the switch branch in parallel and an output terminal connected with the switch branch in series. The control circuit is composed of a coil branch of the electromagnetic contactor and a coil branch of the direct-current quick breaker; the two coil branches are connected in parallel. The output terminal is in connection with an auxiliary contact of an urban rail vehicle. The circuit according to the scheme has the advantages that the control circuit controls power-on or power-off of a relay coil of the master circuit so as to control on and off of the master circuit, thus, in case of an emergency, power-off of the control circuit is under control and automatic power-off of the master circuit is achieved; chances that the urban rail vehicle and a power supply system are slimmed.

Description

technical field [0001] The invention relates to the technical field of rail vehicles, in particular to a statically adjustable power supply cabinet circuit. Background technique [0002] In recent years, my country has vigorously developed rail vehicle transportation, such as high-speed rail transportation between cities, subway and urban rail transportation within cities. In particular, urban rail transit has demonstrated higher transport efficiency than conventional buses, and it plays a huge role in alleviating traffic congestion, saving land resources, and guiding urban spatial layout and land development. Urban rail vehicles carry a large number of passengers, so the safety and reliability of their operation is very important. [0003] In order to ensure the safe operation of urban rail vehicles, it is necessary to carry out regular maintenance on the vehicles. In the current maintenance process, the knife switch in the isolating switch cabinet is often operated to co...

AI Technical Summary

Problems solved by technology

In this way, the danger of manual cutting off the high -voltage power supply system is high, which in turn increases the possibility of damage to the vehicle and power supply system.

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