Position monitoring device for grounding handcart of switch cabinet

Abstract

The invention discloses a position monitoring device for a grounding handcart of a switch cabinet. The device includes a grounding handcart and a pulley guide rail arranged in a switch cabin. A frontpushing and pressing pulley and a rear pushing and pressing pulley are arranged on the pulley guide rail. A front pressing strip is arranged on the pulley guide rail. A front reset spring is arrangedbetween one end of the front pressing strip and the pulley guide rail. A state stroke switch is arranged at the front end of the pulley guide rail. A rear pressing strip is arranged on the pulley guide rail. A rear reset spring is arranged on one end of the rear pressing strip. A position stroke switch is arranged at the rear end of the pulley guide rail. According to the invention, by utilizing the front pushing and pressing pulley and the rear pushing and pressing pulley mounted on the grounding handcart to push and press the stroke switch so as to trigger a stroke switch joint, whether thegrounding handcart is in the switch cabinet or not, whether the grounding handcart is in a working state or not and whether the grounding handcart is in a testing position or not can be monitored andfed back reliably and state signals concerning to that the handcart is moved out of the switch cabinet can be fed back. Besides, influence from handcarts of other switch cabins can be eliminated. Thedevice provided by the invention meets requirements for error interlocking prevention of all switch cabinets on a bus.

Description

Technical field [0001] The invention relates to a removable switch cabinet, in particular to a position monitoring device for a switch cabinet grounding handcart. Background technique [0002] As the main equipment for receiving and distributing power from the power grid, AC metal armored withdrawable switchgear is widely used in power systems because of its convenient operation, good interchangeability, and high reliability of power supply. Among them, for the convenience and safety of maintenance, the grounded handcart is an indispensable functional handcart equipment. Its purpose is to prevent electric shock accidents caused by false power transmission or switching equipment malfunction during the maintenance period. At present, when the widely-used grounding handcart is used, it is safe and reliable to push in the handcart only when the incoming busbar is really not live. It does not have the ability to check whether the grounding handcart is in the switch cabinet or whether ...

AI Technical Summary

Problems solved by technology

At present, when the widely used grounding handcart is used, it is safe and reliable to push the handcart in only when the incoming busbar is not charged. monitoring, if the grounding handcart is in the switch cabinet or in the working test position, the handcart has no position monitoring signal to restrict the push of the circuit breaker handcart in other switch cabinets on the bus, that is, it is possible to push the circuit breaker in other switch cabinets on the bus Pushing the handcart of the circuit breaker in will cause a momentary grounding short circuit due to misoperation, arc burns the staff or cause an arc fire accident

Moreover, the grounding handcart is usually set to work in the busbar equipment cabinet, and it is used in the same warehouse as the fuse handcart in the busbar equipment cabinet. The position monitoring device that needs to be installed may conflict with the fuse handcart

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