JP3156363B2 - switchboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switchboard having an improved mounting position of a circuit breaker for wiring.

[0002]

2. Description of the Related Art Wiring breakers are used in all industries, such as distribution boards, control centers, and distribution boards, because they automatically shut off overcurrent or short-circuit current in indoor wiring and protect the wiring. I have. As a place of use, it is mainly used for branching of lighting circuits, for example, in buildings, factories, schools, hospitals, etc., but various types of wiring breakers are used depending on the purpose of use, application, circuit conditions, and the like. . Incidentally, Japanese Utility Model Laid-Open No. 57-170617 can be mentioned as this kind of technology.

A case where a circuit breaker for wiring is mounted on a switchboard will be described. A wiring breaker is attached to the mounting bracket of the switchboard.The wiring breaker has a load side terminal and a power supply side terminal, and the power supply side terminal and the load side terminal have a power supply side bus bar and a terminal block remote from the wiring breaker. Are connected via a branch line. The power supply side bus and terminal block are attached to the mounting bracket of the switchboard.

[0004]

Therefore, when the load capacity changes, the capacity of the circuit breaker also changes, and the type of mounting brackets and fastening means, such as screws, bolts and nuts, also increases. Management is also difficult.
In addition, the circuit breaker, the mounting bracket, and the fastening means must be changed according to the change in the load, and the change requires a lot of time.

SUMMARY OF THE INVENTION An object of the present invention is to provide a switchboard in which the types of mounting brackets and fastening means are reduced to facilitate management, and the time required for the change operation is greatly reduced.

[0006]

In order to achieve the above object, a switchboard of the present invention connects an electric device to a plurality of phases of a load-side terminal and a power-supply-side terminal, and connects the power-supply-side terminal to a power-supply-side bus.
Between the electrical equipment and the power supply side bus
Place an insulation stand in the
A screw hole for inserting a threaded screw is provided and passes through the through hole.
The power supply side conductor that has been
Fix one end of the mounting screw that passed through to the power supply side bus.
In addition, the insulating table is supported by a power supply-side bus.

[0007]

An end of the fixing means is hooked on the power supply side bus bar, and the fastening means attached to the other end of the insulating base side fixing means is tightened to support the insulating base on the power supply side conductor when the electric equipment is provided. Since the electrical equipment, insulating stand, fixing means, etc. were concentrated in one place, the types of fixing means, fastening means, etc. could be remarkably reduced, and the management was easy, and the change work was quick.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows an entire front view of a switchboard 1, and FIG. 2 is a cross-sectional view of FIG.
Is shown in a partial perspective view of FIG.

As shown in FIGS. 1 and 2, when the door 2 of the switchboard 1 is opened, the inside of the switchboard is partitioned by an insulating barrier 3. The circuit breaker 4 for wiring is arranged on the rear side of the insulation barrier, and the operation button 4A of the circuit breaker 4 for wiring is exposed to the door side by a hole formed in the insulation barrier 3. The five circuit breakers 4 are arranged in the vertical direction. A load terminal 5 and a power supply terminal 6 are provided on the left and right sides of each circuit breaker 4.
The load-side terminal 5 is connected to a load cable 8 via a load-side branch conductor 7. The power terminal 6 is connected to a three-phase power bus 10 via a power conductor 9. The three-phase power supply-side bus 10 extends vertically behind the five circuit breakers. The support structure of the circuit breaker 4 will be described with reference to FIGS.

The circuit breaker 4 has operation buttons 4A and three openings 4B at the center, left and right. By operating the operation button 4A left and right, the circuit breaker 4 for wiring is electrically opened and closed. The left and right openings 4B have three-phase load-side terminals 5 and power-supply-side terminals 6. The distal ends of the load-side branch conductor 7 and the power-supply-side conductor 8 are connected to screw holes provided in these terminals 5 and 6.

Both ends of the intermediate portion of the load-side branch conductor 7 are bent at right angles in the left-right direction to form a tip portion, and penetrate through a screw hole of the tip portion 7A on one side and a screw hole of the load-side terminal 5 in the opening. Secure them with the screws. The other side is connected to a load cable 8. The power-supply-side conductor 9 forms a distal end 9A in which one end of an intermediate portion is bent into a U-shape, and the distal end 9A is formed.
Is inserted into the opening 4B of the circuit breaker 4, and both are fixed by screws penetrating the screw hole of the distal end 9 A and the screw hole of the power supply terminal 9. The intermediate portion 9B is disposed between the rear surface of the circuit breaker for wiring and the insulating base 12, and the contact portion 9C on the other side is connected to the three-phase power source side bus 10 through the through hole 12A of the insulating base 12.

The insulating table 12 has three lateral grooves 12B formed along the intermediate portion 9B, and the first mounting surface 12 is formed between the lateral grooves and on both side surfaces.
C and a second mounting surface 12D. Second mounting surface 1
2D is displaced from the circuit breaker 4 for wiring. Screw holes are formed in these mounting surfaces, and through holes 12A are formed in the lateral grooves 12E. A vertical groove 12E is formed on the back surface of the insulating base 12 along the direction in which the three-phase power supply-side bus 10 is arranged.

The three-phase power supply side bus 10 is disposed between the mounting bracket 15 and the bus support 13. The power supply side bus 10 of each phase has two strip-shaped conductors 10A and 10B arranged correspondingly. One end of each of the strip-shaped conductors 10A and 10B is
Is in contact with The busbar support 13 is composed of two strip-shaped conductors 10.
A storage groove 13A for storing A, 10B, a through hole 13B, and a mounting hole 13C are formed.

Next, a method of supporting the circuit breaker 4 and the insulating base 12 on the power supply side bus 10 will be described with reference to FIGS.

The wire-side bus 10 is formed by screwing a screw inserted through a mounting hole into the switchboard 1, supporting the busbar support 13 on a mounting bracket 14 fixed to the switchboard 1, and as shown in FIG. , 10B are fitted into the storage grooves 13A of the busbar support base 13, and the other ends of the strip conductors 10A, 10B are fitted into the mounting brackets 15 at locations not corresponding to the insulating bases 12, and fixing bolts 16 inserted through holes in the mounting brackets 15 are provided. Passes between the strip-shaped conductors and the bus bar support 13, and the band-shaped conductor nut 17 is fastened and fixed to fixing bolts 16 protruding from the back surface of the bus bar support. When the bus support 13 is not used, the band-shaped conductor 10 may be fixed between the fittings 15 as shown in FIG. 5, but in this case, the fitting 15 and the other conductor 15A are fixed.
The mounting bracket 15 is formed to have a dimension X allowing an insulation distance between the mounting brackets 15 and.

The mounting screw 18 is inserted between a pair of strip conductors as shown in FIG. 6, and a hook portion 18A at the tip is hooked on the back of one strip conductor 10B, for example, which does not correspond to the busbar support 13, and the other side is insulated. Screw hole 1 on second mounting surface 12D of base 12
The insulation base 12 is supported on the strip-shaped conductor 10, that is, on the power source side busbar, by inserting the nut 19 into the mounting screw 18 and tightening by inserting the nut 19 into the mounting screw 18.

In this state, the contact portion 9C of the power supply side conductor 9 is inserted between the through hole 12A and the strip conductor, and the contact portion 9C contacts the strip conductors 10A and 10B. The intermediate part 9B is arranged in the lateral groove part, the tip part 9A is inserted into the opening 4B of the circuit breaker 4, and both parts are screwed through the screw hole of the tip part 9A and the screw hole of the power supply terminal 4B. Fix it. The circuit breaker 4 for wiring fixes the screw 21 inserted through the screw hole 4C into the screw hole of the first mounting surface 12C.

Therefore, when the load capacity of the circuit breaker 4 is changed and the circuit breaker 4 is to be replaced, the screw 21 is removed, and the circuit breaker 4 is immediately removed from the insulating stand 12 or Because it can be installed, replacement work has become easier.

If the nut 19 of the mounting screw 18 is rotated, the power supply-side bus 10 can be easily attached to and detached from the bus support 13 and the insulating stand 12. Further, the circuit breaker 4 and the insulating base 12 are connected to the power supply side bus 10.
Since the components are concentrated, not only the assembling / disassembling operation is facilitated, but also the types of the mounting screws 18 and the mounting brackets 15 can be significantly reduced. Further, since the load-side branch conductor 7 and one end of the power-supply-side bus 10 are adjacent to each other and can be connected with the shortest distance when connecting them, it is economical.

Further, the fixing bolt 16, the mounting screw 18, 1
8A, the screw 21, the nut 19, and the like, which are in contact with the power supply-side bus 10, are covered with an insulating material, or the mounting screw 18, the front part of the screw 21, that is, the side that is in contact with the worker, is covered with the insulating material. By doing so, electric shock when the circuit breaker 4 for wiring is attached to and detached from the power supply side bus 10 is prevented. Further, the screws and nuts may be constituted by insulating members.

On the other hand, as another embodiment of the present invention, the circuit breaker 4 for wiring is directly fixed to the power supply side bus 10 with the screw 21 inserted through the screw hole 4C, and the circuit breaker 4 for wiring is directly connected to the power supply side bus 10 To the wiring breaker 4 and the power supply side bus 10
Can be made thin.

In addition to the circuit breaker 4 for wiring, the present invention can be used for electric equipment such as a circuit breaker, a current transformer for an instrument, and a transformer for an instrument.

[0023]

As described above, according to the switchboard of the present invention,
The electric device includes a multi-phase load side terminal and a power supply side terminal,
An insulating table is arranged between the electric device and the power source side bus, a power source side terminal and a fixing means are passed through the insulating table to provide a passing portion, and the power source side terminal passing through the passing portion is brought into contact with the power source side bus, One end of the fixing means is fixed to the power supply side bus bar, and the fastening means is fastened to the other end of the insulating base side fixing means, so that the insulating base provided with the electric device is supported by the power supply side bus conductor, so that the electric power is supplied to one place. Since the equipment, the insulating base, the fixing means, etc. are concentrated, not only the types of the fixing means, the fastening means, etc. can be remarkably reduced, but also the management is easy, and the changing work and the assembling work are easy.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a switchboard shown as an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a partially exploded perspective view of FIG. 2;

FIG. 4 is a partial sectional view of FIGS. 2 and 3;

FIG. 4 is a partial sectional view of FIGS. 2 and 3;

FIG. 6 is a partial sectional view of FIGS. 2 and 3;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... switchboard, 5 ... load side terminal, 6 ... power supply side terminal, 10 ...
Power supply side bus, 12 ... insulating stand, 13 ... insulating support plate, 18 ...
Mounting screws.

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuo Kawamura 1-15-25 Kanazawacho, Hitachi City, Ibaraki Prefecture Within Hitachi Electric Systems Co., Ltd. (56) References JP-A-3-135308 (JP, A) Opened 52-138648 (JP, A) Opened 2-84245 (JP, U) Opened 54-168535 (JP, U) Opened 57-170617 (JP, U) Opened 63-10707 (JP, U) JP, U) Jikken 47-33101 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02B 1/20 H01H 73/06 H01H 73/20

Claims (2)

(57) [Claims] A power supply terminal having a plurality of phases connected to an electric device and a power supply terminal connected to a power supply side bus, wherein insulation is provided between the electric device and the power supply side bus. Place the base and insert the through holes through which the conductors pass and the mounting screws into the insulating base.
Power supply side that has a screw hole for
The conductor contacts supported on the power source side bus, to fix one end of mounting screws passing through the screw hole on the power supply side busbar, the insulating board is switchboard, characterized in that it is supported on the power supply side busbar. 2. A mounting bracket between the insulating base and a power supply-side bus.
The switchboard according to claim 1, wherein the switchboard is disposed .