JPS63114510A - Mutistage stacked enclosed switchboard - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Technical field to which the invention pertains]

The present invention relates to a closed power distribution board in which circuit breakers, electromagnetic contactors, etc. are stacked and housed in multiple stages.

[Prior art and its problems]

It is desirable that multi-tiered closed switchboards satisfy the JEM closed standard according to specifications and be as small as possible. As shown in FIGS. 3 and 4, the conventional multi-tiered closed switchboard has a movable contactor for power supply to a circuit breaker or electromagnetic contactor 4 to a busbar 3 placed in a busbar room 2 of the closed switchboard construction.
a is the connection bushing 5. connected via a vertical busbar 6;
The load connection contact 41b is connected to a load cable (not shown) via the connection bushing 7. ! Since the power supply contact 41a of the disconnector is traditionally provided above the load connection contact 41b, the connection bushing 7 that connects the load connection contact 41b of the upper circuit breaker connects the insulator tube 7a between the vertical busbars 6. With this structure, the load circuit is too close to the busbar, so it is impossible to meet the closure standards higher than the Ft class of JP and M1153, and the connection between the load circuit conductor and the busbar is impossible. Attempting to provide sufficient insulation distance between them had the disadvantage that the board would become larger.

[Purpose of the invention]

An object of the present invention is to eliminate the above-mentioned drawbacks, to provide a multi-tiered closed switchboard that has a simple structure, satisfies high-grade closed A standards, and can be downsized.

[Key points of the invention]

The present invention involves partially removing the panel wall at the joint between adjacent closed switchboards, arranging vertical busbars in that part in the front-rear direction and connecting them to the horizontal busbar, and installing multi-layered circuit breakers or magnetic contactors in each panel. The power supply lines to the vertical busbar are distributed to the left and right from the vertical busbar, and the power supply lines and the vertical busbar are collectively covered with a partition wall.

[Embodiments of the invention]

FIGS. 1 and 2 show a multi-tiered closed switchboard according to an embodiment of the present invention, and parts indicated by the same reference numerals as in FIGS. 3 and 4 are the same parts. Adjacent closed distribution, lla,
Partially remove the panel wall at the joint of lb, and vertical generatrix 6 supported by insulators 8 on either panel side are arranged in parallel in the front and back. A vertical bus M6 is connected to the horizontal bus wA3. A movable power supply contactor (41a) for power supply of the multi-stage circuit breaker or electromagnetic contactor 4 is connected via the connection bushing 5 to power supply bars 10 distributed to the left and right from the vertical bus bar. The load-side movable contactor (41b) is connected via a connection bushing 7 to a load circuit bar 11 connected to a load cable (not shown). Vertical Mother 16. The power supply bars 9 are collectively surrounded by a partition wall 12. By doing so, the power supply bar 10 and the load/circuit bar 11 are clearly separated by the partition wall 12, and a sufficient insulation distance can be obtained, so that high-grade closure standards are satisfied, and moreover, the vertical bus bar is double Since the surface arrangement is common to the board, the board can be made smaller and wiring work is also easier.

【Effect of the invention】

According to the present invention, a multi-tiered closed switchboard can be downsized while satisfying high-grade closing standards, and the number of wiring steps can be reduced, resulting in a cost reduction effect.

[Brief explanation of the drawing]

FIG. 1 is a rear sectional view showing an outline of a multi-tiered closed switchboard according to an embodiment of the present invention, FIG. 2 is a side sectional view showing an outline of the multi-tiered closed switchboard of FIG. 1, and FIG. 3 is a conventional multi-tiered closed switchboard. FIG. 4 is a cross-sectional side view schematically showing the closed switchboard, and FIG. 4 is a side cross-sectional view schematically showing the multi-tiered closed switchboard shown in FIG. la, lb: closed switchboard, 3: horizontal busbar, 4: circuit breaker or magnetic contactor, 5: connection bushing, 6: vertical busbar, 7: connection bushing, 8.9 = insulator, 10: feed bar, 11: load Circuit bar, 12: partition wall, 41a; movable power supply contact, 41b: load side movable contact. ! 1', □x+qyaawa,',7. □1,・Figure 1

Claims (1)

[Claims] 1) Partially remove the panel wall at the junction of adjacent closed switchboards, place vertical busbars in the front-back direction and connect them to the horizontal busbars, and connect them to the multi-tiered circuit breakers or magnetic contactors of each panel. A multi-tiered closed power distribution board characterized in that the power supply lines are arranged in left and right directions from the vertical bus bar, and these power supply lines and the vertical bus bar are covered with a partition wall.