JPH0670404U - Distribution board - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a distribution board which can easily add a circuit breaker and can appropriately protect a bus bar from arc gas of a branching circuit breaker. [Structure] Unit short busbars 3, 4, 5 are casing 14
Power supply side terminals 7, 8 and 9 projecting from the bottom 11 of the circuit breaker 6 at the upper surface of the busbar unit 17 which is incorporated into Is connected to each unit short bus bar 3, 4, 5 of the corresponding bus bar unit 17.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a distribution board which can easily add a circuit breaker for branching and can appropriately protect a bus bar from arc gas of the circuit breaker.

[0002]

[Prior art]

 In the conventional distribution board, one busbar for each pole was used and a circuit breaker for branching was installed on the side of the busbar. Without a bus, adding a circuit breaker was very cumbersome. In addition, even if it was possible to expand the system in advance, it was necessary to turn off the power to the distribution board during the expansion work. In addition, since the conductive arc gas exhaust holes that are generated when the circuit breaker is shut off are located on the sides of the unit short busbars, arc-to-pole short-circuits between the unit short busbars and the unit short busbars and metal boxes. A protective plate was installed between the exhaust hole of the arc gas and the short bus bar of the unit to prevent a ground fault between the unit and the unit (for example, Japanese Utility Model Publication No. 64-4254).

[0003]

[Problems to be solved by the device]

 However, in this conventional one, one bus bar is used for each pole, so it is very difficult to expand if there is no circuit breaker installation space on the side of the bus bar. There is also the problem that a protective plate must be installed between the arc gas exhaust hole and the busbar in order to prevent a short circuit between the busbars due to the busbar and a ground fault between the busbar and the metal box. is there.

[0004]

[Means for Solving the Problems]

 The present invention has been made to solve the above problems, and a short circuit bus is incorporated in a casing, and a circuit breaker for branching is provided at the upper surface of a bus bar unit that can be connected by a clip metal fitting. It is characterized in that each terminal on the power supply side protruding from the bottom of the circuit breaker is fitted and attached to the corresponding unit short busbar.

[0005]

[Action]

 With this structure, the power line and power line are connected to the load side terminals of the circuit breaker for each branch installed on the upper surface of the unit short busbar.

[0006]

【Example】

 Next, an embodiment of the present invention will be described in detail with reference to the drawings. In FIG. 1, 1 is a metal box, 2 is a base attached to the box 1, and unit short busbars 3, 4 and 5 made of conductive bars are arranged in parallel on the upper surface of the base 2 in a vertical shape with respect to the base. Is covered with an insulating material, that is, incorporated in a busbar device to be described later and attached. Reference numeral 6 is a branching circuit breaker attached to the upper surface of the unit short busbars 3, 4, and 5. Reference numerals 7, 8 and 9 denote power source-side terminals connected to the unit short bus bars 3, 4, and 5 protruding from the bottom 11 of the case 10 of the circuit breaker 6, respectively. , 9 are arranged on the bottom 11 with a space corresponding to the corresponding unit short busbars 3, 4, 5. Reference numeral 10a is an arc gas discharge hole provided in the side plate portion of the case 10 of the circuit breaker 6.

The terminals 7, 8, 9 and the unit short buses 3, 4, 5 are automatically fitted when the circuit breaker 6 is attached to the upper surfaces of the unit short buses 3, 4, 5. It is designed to fit together. That is, in FIG. 2, each of the terminals 7, 8 and 9 is formed in the shape of an insertion plate, and the clip metal fitting 13 composed of two spring plates 12 and 12 is attached to the unit short busbars 3, 4 and 5, respectively. 9 and 9 are mounted so that the terminals and the unit short busbars are fitted by themselves.

Next, the busbar device will be described in detail with reference to FIG. 3. The unit short busbars 3, 4, 5 are set to have a length corresponding to the width of the single circuit breaker 6 for branching. A busbar unit 17 is formed by incorporating it into an insulative casing 14 that also serves as a base, and providing a terminal insertion hole 15 facing each clip fitting 13 in the upper plate portion 16 of the casing 14 to form a large number of busbar units 17. These are connected and mounted on the base 2, and the circuit breaker 6 is mounted on each unit short bus bar unit 17. By adding the bus bar unit 17, it is extremely possible to add the circuit breaker 6 for branching. Easy to do. Further, one end and the other end of each unit short bus bar 3, 4, 5 are connected to each other by forming one end on the clip fitting 18 and the other end on the insertion piece 19. I'm doing it.

[0009]

[Effect of device]

 As apparent from the above description, the present invention forms the bus bar by connecting the bus bar units, so that the expansion can be performed very easily, and the expansion can be performed without stopping the power supply during the expansion work. be able to. Moreover, the connection between each terminal on the power supply side of the branch circuit breaker and each bus bar is formed so that it can be automatically fitted when the circuit breaker is mounted on the upper surface of the bus bar. It can be installed very easily. In addition, when the circuit breaker is attached to the upper surface of the bus bar by screwing it to the base, etc., the branch circuit breaker is temporarily fixed because the power supply side terminals and the bus bar are fitted together. This is where the mounting work becomes even easier.

Further, since the branch circuit breaker is attached to the upper surface of the bus bar, the arc gas exhaust hole provided on the side surface of the circuit breaker is located above the bus bar. Since the conductive arc gas generated when the reactor is shut off does not reach the busbar, a pole-to-pole short circuit between the busbars due to the arc gas and a ground fault between the busbar and the metal box, etc., without the need to install a protective plate. Is not likely to occur. Therefore, the present invention has an extremely great practical value as a solution to the problem of the conventional distribution board.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway side view showing an embodiment of the present invention.

FIG. 3 is a perspective view showing a main part of an embodiment of the present invention.

[Explanation of symbols]

 2 Base 3 Unit Short Bus 4 Unit Short Bus 5 Unit Short Bus 6 Branch Circuit Breaker 7 Terminal 8 Terminal 9 Terminal

Claims (1)

[Scope of utility model registration request] 1. An upper surface portion of a busbar unit (17) in which unit short busbars (3), (4) and (5) are incorporated in a casing (14) and can be connected by clip metal fittings (18) and (19). The branch circuit breaker (6) is provided on the power supply side terminal (7), (8), (9) protruding from the bottom (11) of the circuit breaker (6) to the corresponding unit short bus ( Distribution board characterized by being fitted to 3), (4) and (5).