JPS644254Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a distribution board equipped with a busbar protection device for protecting the busbars from arc gas of a circuit breaker.

(Conventional example) This type of distribution board is designed to prevent short circuits between the busbar poles and ground faults between the busbar and the metal box due to conductive arc gas that occurs when the branch circuit breaker shuts off. Some devices are equipped with a busbar protection device, and in such devices, the busbar support base and the bulkhead between the busbars are formed integrally, so the busbar support base is required to span the entire length of the busbar, and the busbar support base is became large in size, and had to be manufactured for each size of distribution board.

(Purpose) The present invention was made in view of the above points, and its purpose is to be able to support distribution boards of various sizes with one type of bus bar support, and to be easy to manufacture. It is an object of the present invention to provide a distribution board in which partition walls between busbars can be easily installed.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. 1 is a metal box, and the box 1 is provided with a shield plate 3 so that the live parts are not exposed when the door 2 is opened. Reference numeral 4 denotes a bus bar support stand made of synthetic resin that is fixed to the base 5 at a predetermined interval and supports bus bars 6, 7, and 8, and a protrusion with a screw hole 9 provided between the bus bar support parts of the bus bar support stand 4. 11 is formed on both side surfaces of the projection 10 from the lower end to the center. Reference numeral 12 denotes partition walls of the bus bars 6, 7, and 8 whose ends are fitted and supported in the grooves 11 of the bus bar support base 4. The partition walls 12 can also reduce the distance between the bus bars 6, 7, and 8. 13 is the box 1
This is a circuit breaker for branching that is attached to a base 5 so that the operation part protrudes from the shield plate 3 of An exhaust hole 15 is provided in the upper part of the connection part. Reference numeral 16 denotes a busbar protection plate bent into a substantially L shape, and one end of the busbar protection plate 16 is attached to the busbar support base 4 so that it is between the exhaust hole 15 of the circuit breaker 13 and the busbars 6, 7, and 8. It is fitted into the groove 17 and fixed to the protrusion 10 of the bus bar support base 4 with a screw 18. In such a distribution board, the bus bars 6, 7,
Since 8 is protected, short circuit between the poles of bus bars 6, 7, 8 and ground fault to box 1 etc. due to arc gas are prevented. The reason why the busbar protection plate 16 is bent into a substantially L shape is to protect the busbars 6, 7, and 8 from the arc gas that bounces off the side of the box 1. When the circuit breakers 13 are arranged on both sides, or when there is no risk of arc gas splashing back on the sides of the box 1, the bus bar protection plate 16 may be a flat plate. Further, the box 1 may be made of synthetic resin.

(Effects) As described above, according to the present invention, a plurality of busbar supports 4 are installed at intervals, and the partition walls 12 between the busbars 6, 7, and 8 are held by the busbar supports 4.
The bus bar support stand 4 can be made small, and one type can be used in various distribution boards, and can be manufactured economically. Also,
Since the partition wall 12 is attached by fitting into the groove 11 of the bus bar support base 4, the partition wall 12 can be easily attached.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway plan view, FIG. 2 is a partially cutaway front view, and FIG. 3 is a perspective view of the main part. 4... Bus bar support stand, 6, 7, 8... Bus bar, 12
... Bulkhead, 13 ... Circuit breaker, 15 ... Exhaust hole, 16 ... Bus bar protection plate.

Claims (1)

[Scope of utility model registration request] A circuit breaker 13 is connected to the busbars 6, 7, 8 supported by the busbar support stand 4, and a busbar protection plate 16 is arranged between the arc gas exhaust hole 15 of the circuit breaker 13 and the busbars 6, 7, 8. In the distribution board, the partition wall 12 between the busbars 6, 7, and 8 is formed by attaching a plurality of the busbar supports 4 at intervals and fitting both ends into the grooves 11 of the busbar supports 4. A distribution board characterized by being held.