JPS63277407A - Wall contact type enclosed switchboard - Google Patents

Abstract

PURPOSE:To prevent accidents from happening at respective units, by shielding a current transformer, a cable chamber, a bus bar chamber, a breaker chamber, and the like perfectly with partition walls. CONSTITUTION:So far as an enclosed switchboard chamber composed of a front door 1 on the front surface, a controlling chamber 2, and a bus bar chamber 3 is concerned, a bus bar 4 and a conductor 5 connected to respective breakers are marked off by partition walls 6, 7, 8. A breaker 10 communicates with a current transformer chamber 14 through a contact 11 and a disconnecting section bushing 12, and a connecting conductor 21 is set almost at right angle and in connected to a current transformer 15. The conductor 21 is connected from the orthogonally set current transformer 15 to a cable head 16 set on the side surface of the board, as they are, and communicates with an external section through a lower section. So far as these respective units are concerned, said bus bar unit 3 is blocked off from the partition walls 6, 7, 8, and a breaker unit 17 is blocked off from partition walls 13, 18, 19, and the current transformer cable unit 14 is blocked off by the partition walls 7, 18, 19, 20 and the like, and the respective units are independently partitioned with earthing metal and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a closed power distribution board, and particularly to a multi-tiered wall-adhered power distribution board with a reduced panel depth.

[Conventional technology]

The main purpose of conventional panels is to accommodate a large number of stacks, but in reality the current transformers and cable heads have a small processing size, and the structure is complicated because the electric wires are laid as conductors, and the wiring is difficult to withstand short circuit current. The limit was 12kA. Furthermore, the current flow was less than 600A, and the substation capacity was relatively small.

[Problem that the invention seeks to solve]

In conventional wall-adhered switchboards, the current transformer is placed in the lateral direction of the panel, that is, in the cable room, so the width of the panel becomes large and the building dimensions have to be elongated. or,
The conductor of the main circuit was an electric wire, which made the wiring work easy, but the short circuit capacity and current carrying capacity were small, and the structure was complicated. Furthermore, there are no safety barriers or bulkheads to prevent accidents from spreading.
1153, it was difficult to use it for important loads.

The purpose of the present invention is to achieve high short-circuit strength without increasing the size of the panel, and to also consider safety and prevention of accidents, and furthermore, to prevent arc discharge from each room in the event of an accident. To provide a power distribution board that is equipped with a discharge tube that can be discharged and also has a ventilation structure to suppress temperature rise in narrow components.

[Effect]

Current transformers, gable rooms, busbar rooms, circuit breaker rooms, etc. are completely shielded by bulkheads, so accidents in each unit will not spread.

Further, since a common exhaust duct is provided, the temperature rise in each unit can be kept low even if the units are divided into small rooms by the ventilation vents.

In addition, if a short-circuit accident occurs in each unit, large arc energy will be generated, but this is also released by providing an outlet in the common exhaust duct, so there is no risk of exposure.
It is possible to eliminate the risk of damage etc.

[Means for solving problems]

The above purpose is to use the upper part of the circuit breaker chamber of the stacked closed switchboard as a current transformer chamber, arrange the conductors and current transformers connected to the circuit breaker orthogonally to the insertion direction of the circuit breaker, and connect the cables installed on the side. Connect to the room. The cable room is provided just in contact with the right side of the circuit breaker room and is located approximately in the center of the side of the rock.

The busbar room is installed in the ceiling and penetrates through each panel in common, but the connection from the busbar to the first circuit breaker and the second circuit breaker is at the rear of the circuit breaker room, that is, on the front surface of the circuit board. Therefore, the rear part of the rock is attached with a chimney-like square tube that contacts the busbar room and the cable room at each stage.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. The closed switchboard (hereinafter referred to as the board) has a front door 1. Control room 2. In the busbar room 3, the busbar 4 and conductors 5 connected to each circuit breaker are partitioned by partition walls 6, 7.8. The heat and arcs generated in this unit 3 are exhausted to the top through the ceiling vent 9. Circuit breaker 1
o is connected to the current transformer chamber 14 through the contactor 11 and the disconnecting bushing 12, and connected to the current transformer 15 with the connecting conductor 21 arranged at a substantially right angle. This orthogonally arranged current transformer 15 is directly connected to a cable head 16 provided on the side of the panel and communicated with the outside from the bottom. Each of these units includes the aforementioned busbar unit 3 and partition walls 6, 7, 8 .
The circuit breaker unit 17 includes bulkheads 13.18, 19. The current transformer cable unit 14 is partitioned by partition walls 7, 18, 19, 20, etc., and each unit is partitioned independently by a ground metal or the like. Inside these compartments the circuit breaker chamber 17. The control room 2 is exhausted through a ventilation opening 22 . However, the current transformer cable room 14 is surrounded by the bus room 3 and the circuit breaker room 17. Therefore, an exhaust chamber 23 is provided at the rear of the right side of the panel, and is used as a bus room and a current transformer cable room, and also as a room that can be commonly contacted with each stage of the stack, thereby serving as a ventilation port 23 and a discharge device. The temperature rise can be suppressed to a low level, and the board can be made smaller.

According to this embodiment, although the depth of the board is greatly reduced and each unit is completely separated, the short-circuit capacity and single current carrying capacity are large. In addition, internal arc energy can also be released.

〔Effect of the invention〕

According to the present invention, it is an a-tight type panel with sufficient partition walls, allowing orthogonal arrangement of current transformer rooms and installation of a common exhaust duct, and while doubling the short circuit capacity and doubling the current carrying capacity compared to the conventional one, the panel size is reduced. It can be downsized by 80% compared to conventional models.

[Brief explanation of the drawing]

Fig. 1 is a side view of one embodiment of the present invention, Fig. 2 is a front view of Fig. 1 with the door and bulkhead removed, Fig. 3 is a plan view of Fig. 1 with the ceiling removed; FIG. 4 is a perspective view showing the current transformer, cable room and exhaust duct unit. Bird 3 diagram high lambda area

Claims (1)

[Scope of Claims] 1. In a single-sided inspection type power distribution board that incorporates a drawer-type circuit breaker, current transformer, cable, and control equipment, a current transformer room as a secondary side is provided above the circuit breaker room. The conductor arrangement is arranged orthogonally toward the side, a cable room connected to this is provided in the center of the right side, and a duct is provided at the rear of the right side that makes common contact with the cable rooms and busbar rooms of each stage and can be discharged to the top. A wall-adhesive closed switchboard characterized by being provided with.