Control loop disconnection self-diagnosis device for 10kv switchgear

Abstract

The embodiments of the invention provide a control loop line fracture self-diagnosis device for a 10kV switch cabinet. The control loop line fracture self-diagnosis device comprises a housing; screw holes used for mounting the self-diagnosis device onto the cabinet door of the switch cabinet are formed at the edges of the front surface of the housing; a display device used for displaying the state of the self-diagnosis device is embedded in the front surface of the housing; a sampling circuit connected with a loop is arranged in the housing ; the output end of the sampling circuit is connected with the input end of a logic processor; and the output end of the logic processor is connected with the display device. According to the control loop line fracture self-diagnosis device, whether a defect is caused by a primary cause or a secondary cause is judged through monitoring the voltages of primary or secondary professional demarcation points of a switching-on loop and a tripping loop are monitored; strategies such as optical separation and delay shutdown are adopted, it can be ensured that the device does not exert unnecessary influence on a control loop which operates normally, and outlet misoperation can be eliminated, maintenance personnel can be facilitated to directly locate a fault point range, maintenance time can be shortened, and maintenance efficiency can be improved.

Description

technical field [0001] The invention belongs to the field of electric equipment, in particular to a control loop disconnection self-diagnosis device for a 10kV switch cabinet. Background technique [0002] With the continuous development of the economy, the number of 10kV power supply lines continues to increase. The defect of disconnection of the control circuit in 10kV line protection also emerges continuously with the increase of protection devices. Once there is a defect of disconnection of the control circuit, it means that the 10kV line cannot be operated (distance, local cannot be opened and closed). [0003] There are many reasons for the disconnection of the control circuit of the protection device, such as: the secondary wiring of the control circuit is loose, the auxiliary contact of the switch handcart is not in place, etc., involving primary and secondary specialties. The existing methods of prompting the disconnection of the control circuit are only the alarm...

AI Technical Summary

Problems solved by technology

The reason for the disconnection of the control circuit is often single, but the dispatching of the defect elimination needs to send two groups of personnel with different specialties to ensure the completion of the defect elimination

Under the background of heavy production pressure and shortage of production personnel in our office, such a way of dispatching labor means a waste of human resources

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