Special appliance for preventing pressing plate of relay protection panel from being opened and closed by mistake

Abstract

The invention relates to a special appliance for preventing a pressing plate of a relay protection panel from being opened and closed by mistake, which comprises a shield magnetically sucked and fixedon a protection pressing plate mounting plate. The shield comprises an inner shell and an outer shell, the outer shell covers the inner shell, the lower end of the outer shell is hinged with the lower end of the inner shell, and a magnet is embedded in the inner shell. The special appliance has a simple structure, the design is reasonable, the use is convenient, mounting and disassembly can be quickly carried out, a device for mistakenly casting or cancelling the pressing plate during an operation process can be prevented, a maintenance technician can conveniently isolate an operation deviceand a maintenance device, errors of mis-operation in operation and mistakenly touching the hard pressing plate in maintenance can be reduced, the protection device malfunction and failure to operate accidents are reduced, reliable error prevention measures are ensured in the operation process or the maintenance process, the working efficiency is improved, and the working errors are reduced.

Description

technical field [0001] The invention relates to a special appliance for mis-opening and closing of a pressure-proof plate of a relay protection screen cabinet. Background technique [0002] During the operation of the relay protection device, it is necessary to change the state of the hard pressure plate of the secondary protection device to switch on and off the function and exit according to the wiring mode of the primary equipment and the change in the switching operation. In addition, during the regular inspection and technical transformation of the protection device, secondary safety measures need to be taken in advance, to isolate the operating equipment and the maintenance equipment, to switch on and off the relay protection device pressure plate and to prevent the wrong pressure plate from being inserted. Due to the large number of pressure plates on site, especially when the names of adjacent screen cabinets are similar, or equipment in different intervals is instal...

AI Technical Summary

Problems solved by technology

Due to the large number of pressure plates on site, especially when the names of adjacent screen cabinets are similar, or equipment in different intervals is installed on the same screen, and bus differential protection involves multiple intervals, it is very easy to cause the protection hard pressure plate to be mis-injected or returned by mistake, resulting in protection failure. Misoperation or refusal to move

[0003] In the traditional way of working, the running protection device is hard-pressed, and the hard-pressed hard-pressed plates that are often cast are marked with small red dots to distinguish them from other press-plates. However, this marking measure alone cannot guarantee the possibility of personnel mistakenly switching and returning the hard-pressed plates.

In addition, in the process of regular inspection and technical improvement, in order to prevent accidental contact with the hard pressure plate of the operation protection device, red tape is often used. In the process of practice, it is found that the side pressure input The pressure plate is easy to cause mis-insertion, and the pressure plate may be pulled up for the positive pressure pressure plate

At the same time, it also causes waste of tape

At present, there are certain hidden dangers in the anti-misoperation measures of hard press plates in various places, and the possibility of misoperation cannot be truly and effectively eliminated, so it is not suitable for practical application on site.

[0004] At present, no equipment manufacturer has taken measures to prevent accidental switching of the hard pressure plate on the protective screen cabinet

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