Transformer substation protection pressure plate switch-in and switch-out warning device

Abstract

The invention relates to a transformer substation protection pressure plate switch-in and switch-out warning device. The device is characterized in that the middle parts of the inner sides of all outlet pressing plates and functional pressing plates are provided with installing holes, each installing hole is internally provided with a travel switch, the normally-open contacts of all travel switches are connected in series to form a normally-open contact group, the middle parts of the inner sides of all overhaul pressing plates are provided with installing holes, each installing hole is internally provided with a travel switch, the normally-closed contacts of all the travel switches are connected in series to form a normally-closed contact group, and the normally-closed contact group, the above normally-open contact group, and a conventional pressing plate state indicating lamp (LD1) are connected in series, and then are connected in parallel with a unconventional pressing plate state indicating lamp (LD2). After using the device, through adding the travel switches on the insulation part of an existing protection pressure plate and designing corresponding logic circuits, operation or whether the protection pressure plate is in a satisfactory operating state can be prompted to inspection tour personnel in real time.

Description

technical field [0001] The invention relates to a warning device for throwing and withdrawing a protective pressure plate of a substation. Background technique [0002] In power systems, primary equipment must never be allowed to operate without protection. The protection pressure plate is an important part of the protection circuit, and it is one of the important factors for whether the protection device can operate correctly, thereby protecting the safety of people, power grids and equipment. Putting in and out of the protection pressure plate is an important maintenance operation in the power system. With the development of maintenance work, temporary changes in equipment status, power flow or scheduling requirements, the state of the protection pressure plate will change at any time (for example: reclosing switch on and off). However, it has been found in practice that if a large number of platen states change in a short period of time, there will be a possibility of mi...

AI Technical Summary

Problems solved by technology

However, in practice, it has been found that if a large number of platen states change in a short period of time, there will be the possibility of missed casting or missed return, which will lead to the failure of the protection function and cause heavy losses to people and property.

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