Solid insulation ring main unit lower door interlocking device

Abstract

The invention belongs to the technical field of power distribution equipment and relates to a ring main unit, in particular to a lower door interlocking device of a solid insulation ring main unit. The lower door interlocking device comprises a lower door cabinet, a partition is arranged at the top of the lower door cabinet, positioning pins are uniformly distributed on the two sides of the opening end of one side face of the low door cabinet in the vertical direction, and a low door is arranged on the lower door cabinet through an installation groove formed in the lower door; a bent plate is fixed to the upper portion of the lower door, a first notch is formed in the bent plate, a three-station mechanism is connected to the partition through a lower door pull rod on the three-station mechanism, the lower end of the lower door pull rod is connected with the bent plate through the first notch, a first elastic cylindrical pin is arranged on the upper portion of the lower door pull rod, a spring is further arranged on the lower door pull rod, and the lower end of the spring abuts against the upper surface of the partition. The lower door interlocking device can guarantee that when the three-station mechanism is located at an isolation position and a working position, the lower door cannot be opened; when the three-station mechanism is located at an earthling position, the lower door can be opened and closed, and when the lower door is opened, the three-station mechanism cannot be operated.

Description

technical field [0001] The invention belongs to the technical field of power distribution equipment, and relates to a ring network cabinet, in particular to a lower door interlocking device of a solid insulation ring network cabinet. Background technique [0002] In power transmission and distribution, due to its small size and complete functions, the ring main unit is the most widely used power equipment in substations and enterprises, and it is the development direction of power transmission and distribution. The ring main unit not only covers various power distribution requirements for power feeding, metering and communication, but also must be 1 / 3 smaller in size under the same conditions. There are new breakthroughs and inventions. At present, it is difficult to accurately control the opening and closing of the lower door when the commonly used ring main unit is working. Contents of the invention [0003] The purpose of the present invention is to overcome the defic...

AI Technical Summary

Problems solved by technology

At present, it is difficult to accurately control the opening and closing of the lower door when the commonly used ring network cabinet is working.

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