Anti-misoperation locking device for high voltage cabinet door in box-type substation

Abstract

The invention discloses an anti-misoperation locking device for a high-voltage cabinet door of a box-type substation, comprising: a high-voltage switch cabinet, the high-voltage switch cabinet including a switch cabinet terminal block, a high-voltage vacuum load switch, and a high-voltage switch auxiliary contact; a high-voltage metering cabinet, the high-voltage metering cabinet The cabinet includes a metering device, a metering cabinet terminal block, a live sensor and a GSN live display; a high-voltage cabinet door, the high-voltage cabinet door includes a DSN electromagnetic lock; a high-voltage incoming line cabinet, and the high-voltage incoming line cabinet includes an incoming line cabinet terminal block; control power supply; the auxiliary contact of the high-voltage switch is electrically connected to the switch of the high-voltage incoming line cabinet and the control power supply through the terminal block of the switch cabinet; the high-voltage vacuum load switch is connected to the high-voltage incoming line cabinet through the The terminal block of the incoming line cabinet is electrically connected, and the high-voltage incoming line cabinet is electrically connected with the high-voltage metering cabinet through the terminal block of the incoming line cabinet.

Description

technical field [0001] The invention relates to the technical field of power supply safety devices, in particular to an anti-misoperation locking device for high-voltage cabinet doors of box-type substations. Background technique [0002] When the 10kV cable is charged and the high-voltage isolation switch is closed and the high-voltage switch is running after closing, the door of the high-voltage metering chamber must not be opened. It can only be opened when the high-voltage isolation switch is opened and the high-voltage switch is disconnected to ensure power failure. The door of the high-voltage chamber is measured, and the inspection and maintenance work can only be carried out after safety measures are taken. [0003] At present, most of the 10kV high-voltage cabinet doors used in the field are metal-closed cabinet doors, except that the 10kV feeder switchgear of the KYN trolley cabinet has the mechanical interlock function of the grounding knife switch and the rear ca...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the 10kV high-voltage cabinet doors used in the field are metal-closed cabinet doors, except that the 10kV feeder switchgear of the KYN trolley cabinet has the mechanical interlock function of the grounding knife switch and the rear cabinet door, that is, it can only be used when the grounding knife switch is closed. , to open the rear cabinet door, and the rear cabinet doors of the other switch cabinets are only fixed with simple hexagonal bolts. Regardless of whether there is live equipment in the cabinet, if the maintenance personnel do not know it, they only need to use the hexagonal wrench. Unscrew the door

Moreover, a single mechanical lock is easily damaged, and it is easy to wear out after a long time of use, thus losing its protection function, and there is a great potential safety hazard.

[0004] In addition, the mechanical locking devices currently used in the field have no unlocking function, and the closed switchgear cannot realize the power inspection grounding, and cannot flexibly realize the power failure unlocking function, and does not have the function of preventing the switch from being accidentally switched; this not only It is inconvenient for operators to carry out inspection and maintenance, and it is also likely to cause line failure due to misoperation of the switch

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