Switch gear

Abstract

A switch gear constructed such that a switching device and the operating shaft (10) therefor are housed in a case (1), with the switching device being switched on/off by inserting an operating handle (11) into a insertion port (12) from the outside and rotating the operating shaft (10), the switch gear being equipped with an interlock mechanism having: a shutter (13) that opens/closes the insertion port (12); a first cam (17) attached to a camshaft (16) that rotates in conjunction with the rotation of the operating shaft (10); a second cam (18) that rotates in conjunction with the switching of the shutter (13); a first lock (14), which can be locked by the engagement of a latch with recessed parts provided on both cams (17, 18), when the switching device is "off" and the shutter (13) is "closed"; and a second lock (15), which can be locked by the engagement of a latch with the recessed parts provided on both cams (17, 18), when the switching device is "on" and the shutter is "closed".

Description

technical field [0001] The invention relates to a switchgear, in which switchgear such as a disconnector switch or a grounding switch is accommodated in a frame of the switchgear, and includes a mechanism for locking the switchgear when the switchgear is in the "on" or "off" state. Key-type interlock mechanism. Background technique [0002] When performing maintenance and inspection on the high-voltage circuit of the switchgear, it is necessary to set the switches of the upper system and the lower system connected to the switchgear to the "OFF" state in advance, and to ground the circuit to be maintained and inspected. Since there may be residual charge in the circuit when it is not grounded, contact with the charging part and short-circuit accidents may occur. Therefore, it is necessary to adopt the following structure: by setting the structure that the key is pulled out after the grounding switch is locked in the "grounded" state, it can be mechanically locked in the grou...

AI Technical Summary

Problems solved by technology

[0005] In addition, a key-type interlock mechanism is disclosed. The key-type interlock mechanism includes: an operation shaft, the end of which has a prism part that can be freely attached to and detached from the operation handle, and can operate the opening and closing of the isolation switch. A cylindrical operating piece, which is arranged on the prism part of the operating shaft, slides between the position covering the prism part and the position exposing the prism part, and rotates together with the operating shaft; two lever pins (Japanese: ロッドピン) , these two lever pins can be engaged with the pin holes at two positions in the circumferential direction of the operating piece; and two lock heads (Japanese: ingot front), these two lock heads lock the lever pin When pressing, at the rotational position of the operation piece corresponding to the off state and on state of the isolating switch, each lock is operated to engage the lever pin with the pin hole of the operation piece, and the operation piece is fixed on the cover. At the position of the prism part, the operation handle cannot be inserted (for example, refer to Patent Document 2)

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