JPH0140244Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is called a wiring circuit breaker (hereinafter referred to as MCB).
Concerning a closed switchboard containing a.

Since MCBs are used in low-voltage circuits, insulation distances do not have to be considered so much and therefore a large number of MCBs can be housed in a closed switchboard. In this case, if they are arranged in multiple stages and in multiple rows on the mounting plate, the power supply side busbar and the load side cable will intersect on the back side of the mounting plate, making connection work, maintenance inspection, etc. difficult. For this reason, if the MCBs are arranged horizontally in the center of the board in a single vertical row, and the left and right sides of the MCB are used as a power supply side busbar room and a load side cable room, the busbars and cables will not intersect, and the above-mentioned drawback can be solved. However, even in this case, in the case of thin type switchboards, which have been recently reduced in depth to reduce the installation area of the switchboard, they can be installed with the back side touching the wall of the building, so maintenance and inspection can be carried out in the control wiring room in the front. This will be done from. At that time, there was a risk of electric shock because the left and right power supply side busbars, load side cables, and live parts of the MCB body were exposed.

This idea was proposed with the above points in mind, and includes a protective plate that can be opened, closed, and detached to protect the power supply side busbar room and load side cable room as a control wiring room, including the live parts of the MCB main body. It is characterized by

An embodiment of this invention will be described below with reference to the drawings. FIG. 1 is a front view of a closed switchboard to which this invention is applied, with the front door removed, and FIG. 2 is a plan view including the front door, taken along line AA in FIG.

1 is the closed switchboard body, and 2 are each arranged horizontally in a single vertical row approximately in the center of the panel body.
In the case of the MCB shown in the figure, five are mounted. 3 is
This is a mounting bracket for fixing the MCB 2 to the board body 1. Reference numeral 4 designates a busbar room that accommodates the power supply side busbar 5 and branch busbar 6, and 7 a cable room that accommodates the load side cable 8. A branch busbar 6 and a cable 8 are connected to the left and right terminals of each MCB 2, respectively. Reference numerals 9 denote protective plates made of metal that protect the live parts of each MCB 2, the busbar chamber 4, and the cable chamber 7, respectively.
Each of the protective plates 9 is detachably attached to a fixing plate 11 via a sliding hinge 10 and can be opened and closed, and can be fixed to the mounting bracket 3 with screws 12. In addition, 13 is MCB2 ON,
OFF operation knob, 14 is a control wiring room, and 15 is a front door.

In this way, according to this proposal, the live parts, busbar room, and cable room of the MCB are protected by a protective plate made of metal, and this protective plate is made detachable from the fixing plate and can be opened and closed, thereby preventing accidental damage to the busbar. Since you cannot get close to the live parts of the room, cable room, and MCB, there is no risk of electric shock, and the protective plate is removable and can be opened and closed, making maintenance and inspection easier.

[Brief explanation of drawings]

The figures show one embodiment of this invention; Fig. 1 is a front view with the front door removed, and Fig. 2 is a front view of the first embodiment.
It is a top view taken along the line AA in the figure. 2...MCB (wiring cutter), 4...Power side busbar room, 7...Load side cable room, 8...Protection plate, 10...Slip hinge, 11...Fixing plate, 12...
...screw, 14...control wiring room.

Claims (1)

[Scope of Claim for Utility Model Registration] A plurality of wiring sheaths and disconnectors are mounted horizontally in a single vertical row approximately at the center inside the panel body, and a busbar room and a cable room are provided on the left and right sides of the wiring sheaths and disconnectors. In the closed switchboard provided, there is a fixed plate provided at a position closer to the front on both sides inside the panel main body, a sliding hinge provided on the fixed plate, and a switch that can be freely opened and closed on the fixed plate via the sliding hinge. A closed switchboard comprising a removably installed metal protective plate having a step in the depth direction, which serves as a control wiring room for each of the bus room and cable room, including the live parts of the wiring sheath and disconnector.