Pressing plate entering and exiting state detection device and pressing plate misjudgment preventing system

Abstract

The invention discloses a pressing plate entering and exiting state detection device and a pressing plate misjudgment preventing system, and belongs to the technical field of electric power equipment.A pressing plate comprises a first terminal, a second terminal and a pressing plate connecting piece for achieving connection and disconnection of the first terminal and the second terminal. The detection device comprises a fit accessory which is fixed to the pressing plate connecting piece and moves along with the pressing plate connecting piece, a magnet sensing accessory which is in magnetic fit with the fit accessory and moves up and down along with movement of the fit accessory and detection sensors which are in sensing fit with the sensing accessory, the detection sensors comprise the first detection sensor for detecting the entering state of the pressing plate and the second detection sensor for detecting the exiting state of the pressing plate, and the magnet sensing accessory isin sensing fit with the first detection sensor or the second detection sensor in an alternative mode. The pressing plate misjudgment preventing system comprises the pressing plate entering and exitingstate detection device. The detection device is convenient to operate, capable of saving time and energy, good in area compatibility, high in accuracy and reliability and capable of decreasing the misjudgment ratio.

Description

【Technical field】 [0001] The invention relates to the technical field of electric power equipment, in particular to a device for detecting the throwing and withdrawing state of a pressing plate and a system for preventing errors of the pressing plate. 【Background technique】 [0002] The relay protection device is one of the important equipment to ensure the safe operation of the power system, and provides guarantee for the safe operation of the power system and equipment. No normal implementation, but in actual operation, multiple pressure plates are installed on a screen cabinet, the number of pressure plates is large, the types are many, and the arrangement is complicated, which brings great difficulties to the use and management of power system protection pressure plates. Misoperation and refusal of power protection caused by voltage boards occur from time to time, which brings great harm to the operation of the power grid. [0003] The Chinese invention patent with the ...

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Problems solved by technology

[0002] The relay protection device is one of the important equipment to ensure the safe operation of the power system, and provides guarantee for the safe operation of the power system and equipment. No normal implementation, but in actual operation, multiple pressure plates are installed on a screen cabinet, the number of pressure plates is large, the types are many, and the arrangement is complicated, which brings great difficulties to the use and management of power system protection pressure plates. Misoperation and refusal of power protection caused by voltage boards occur from time to time, which brings great harm to the operation of the power grid.

[0003] The Chinese invention patent with the authorized announcement number CN205539226U discloses a pressure plate state detection device. The patent includes a plurality of detection mechanisms and a conductive mechanism electrically connected to the multiple detection mechanisms. The multiple detection mechanisms correspond to the pressure plate to be tested one by one, and The detection mechanism is set on the transmission mechanism to detect the input / retraction state of the corresponding pressure plate to be tested, and output the corresponding input / retraction state of the pressure plate to be tested through the transmission mechanism. The pressure plate state detection device is suitable for various types of pressure plate And the distance between the pressure plates simplifies the installation process, the wiring is simple, the versatility is strong, and it is convenient to use. However, using this detection device, since the throwing and withdrawing states are the same sensing part, that is, the same sensor, whether the sensing part can sense the sensor's position through the sensing part The position signal is used to determine the status of throwing and withdrawing, that is, when the sensor detects the sensing part, it will output the throwing signal (or withdrawing signal), otherwise, it will output the withdrawing signal (or throwing signal) when the component is not sensed, and the error rate is high. When the pressure plate is about to When it is switched on but not actually switched to the connection contact, that is, when it is not put in place, but at this time, because the sensing component has entered the sensing range of the sensing component, the sensing component is activated by the sensing component, so that the background host It is confirmed as "input state", which causes the system to misjudge the state of the platen, which may cause operation errors, and there is a great danger

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