JP2001015005A - Circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circuit breaker capable of easily forming a primary transmitting circuit at all positions of a plurality of circuits provided, without requiring a work of cutting a branch bar, and of forming a primary transmitting circuit between branch breakers. SOLUTION: The circuit breaker 1 has a containing casing 2 having one end 3a in its longitudinal direction formed in a step-wise manner. A primary side terminals 5, 5 are disposed on a lower step portion 4, and a secondary side terminals 7, 7 are disposed on an upper step portion 6. The other end 3b of the containing casing 2 in the longitudinal direction has opening portions 12, 12 for inserting a branch bar branching from a master bar connected to a secondary side terminal of a master breaker. The opening portions 12, 12 are completely isolated from inside of the circuit breaker 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a circuit breaker for a primary feed of a power supplied from a primary terminal of a main breaker.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 14, a distribution board 8 composed of a main breaker 81 and branch breakers 82 and 82a.
3 is usually the secondary terminals 84 and 8 of the main breaker 81.
4 and 84 are connected to primary terminals 85 and 85 of a circuit breaker 82 serving as a branch breaker 82 by copper bar connection. However, when the main breaker 81 that protects the main power line trips, the secondary terminals 84,
Since power is no longer supplied to the branch breaker 82 connected to the branch breaker 84, in an emergency power supply circuit or the like, the branch breaker 8 is connected to the primary terminals 86, 86 of the main breaker 81.
Electric wires 87, 87 are connected to primary terminals 85a, 85a of 2a to supply power.

The branch breaker 82 is a three-wire main bar 8.
8, 88, 88, two branch bars 8
9 and 89 are formed as a group of branch breakers connected by copper bars, and in many cases, at least the voltage pole side branch bar 89 is formed integrally with the main trunk bars 88, 88 in order to improve assembling workability. . Such a distribution board 83
In the case where the primary feed connection is performed by using the branch bars 89, 89 formed integrally with the main trunk bars 88, 88 as shown in FIG.
Are cut, and electric wires are connected from the primary terminals 86, 86 of the main breaker 81 to each of the circuits of the branch breaker 82a.

When the primary feed circuit of a branch breaker is multi-circuited, a first branch breaker group 91a and a second branch breaker group 91b are provided side by side as shown in FIG. Reference numeral 91a denotes a copper bar connection from the secondary terminals 93, 93, 93 of the main breaker 92, and a second branch breaker group 91b includes primary terminals 94,
94, 94, the second branch breaker group 9 by wire connection
1b is connected to the main bars 95, 95, 95.

[0005]

In the conventional circuit breaker described above, the branch bar must be cut in order to make the primary feed connection, but the main bar and the branch bar are provided on the primary side of the branch breaker. Therefore, there is a drawback that the work space is very narrow and workability is poor. Therefore, the primary feed circuit is often limited to four circuits at the four corners of the branch breaker group. In addition, when the feed wiring is performed between the primary terminals of the branch breaker, since the terminal shape of the circuit breaker is a box-shaped terminal, it is difficult to firmly connect the electric wires and the operation is difficult.

In the case where the first branch breaker group and the second branch breaker group are juxtaposed, the terminal portion of the main bar of the second branch breaker group is located between the first breaker group and the second breaker group. In addition, there is a drawback that the size of the distribution board becomes large because a gutter space for connecting the electric wires is required.

[0007]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the conventional circuit breaker, an object of the present invention is to eliminate the need for cutting a branch bar, and to simply perform the operation at all positions of a plurality of arranged circuits. A circuit breaker capable of forming a primary feed circuit and also forming a primary feed circuit between branch breakers is provided. The structure of the circuit breaker includes at least a primary terminal and a secondary terminal in a storage case. And a primary terminal and a secondary terminal are disposed at one end in the depth direction of the storage case.

Also, in the circuit breaker, the primary terminal is disposed below and the secondary terminal is disposed above.

Further, in the circuit breaker, at least one of the primary terminal and the secondary terminal is formed with a screwless terminal.

Also, two or more electric wires can be inserted into the screwless terminal.

In the circuit breaker, an opening into which the branch bar is inserted is provided at the other end in the depth direction of the storage case, and the opening is insulated from the inside of the circuit breaker.

[0012]

According to the circuit breaker of the present invention, the primary terminal and the secondary terminal are disposed at one end in the depth direction of the storage case, so that the branch bar is cut. A primary feed circuit can be easily formed at all positions of a plurality of circuits without requiring any operation.

According to the circuit breaker of the second aspect, the workability can be improved by disposing the primary terminal below and the secondary terminal above.

According to the circuit breaker of the third aspect, since at least one of the primary terminal and the secondary terminal is formed of a screwless terminal, workability can be improved.

According to the circuit breaker of the fourth aspect, since two or more electric wires can be inserted into the screwless terminal, a primary feed circuit between the branch breakers can be formed.

According to the circuit breaker of the present invention, an opening into which the branch bar is inserted is provided at the other end in the depth direction of the storage case, and the opening is insulated from the inside of the circuit breaker. There is no need to cut the branch bar.

[0017]

FIG. 1 shows a first embodiment of a circuit breaker according to the present invention.
This will be described with reference to the accompanying drawings in FIGS.

As shown in FIGS. 1 and 2, the circuit breaker 1 has one end 3 a in the depth direction of the storage case 2 formed in a step shape, and primary terminals 5, 5 are provided in the lower portion 4. In addition, secondary terminals 7, 7 are arranged in the upper section 6. A main bar 1 connected to the secondary terminals 9, 9, 9 of the main breaker 8 is provided at the other end 3b in the depth direction of the storage case 2.
Openings 12, 12 for inserting branch bars 11, 11 branched from 0, 10, 10 are provided.
Is completely insulated from the inside of the circuit breaker 1.

As shown in FIG. 3, the distribution board 13 has a branch bar 11 branched from three-wire main bars 10, 10, 10 connected to the secondary terminals 9, 9, 9 of the main breaker 8. Two are provided for each circuit.

When a primary feed circuit is desired, branch bars 11 and 11 are inserted into the openings 12 and 12 of the circuit breaker 1, the circuit breaker 1 is mounted on the distribution board 13, and the primary side of the main breaker 8 is mounted. One end of each of the electric wires 15 is connected to the terminal 14, and the other end is connected by tightening and fixing the terminal screw 16 of the primary terminal 5 of the circuit breaker 1. And
The electric wires 17 are fastened and fixed to the secondary terminals 7 of the circuit breaker 1 with the terminal screws 18, 18.
7 and 17 are connected to an emergency circuit or the like. In addition, the circuit breaker 1
The circuit may be mounted on any circuit.

When there are a plurality of primary feed circuits, as shown in FIG. 5, one end of each of the wires 19, 19 is connected to the primary terminals 5, 5 of the circuit breaker 1, and the other end is connected to another circuit breaker. 5 and 5 are connected to one primary terminal, and the primary feed is performed.

In this embodiment, the primary terminal of the circuit breaker is formed in the lower part and the secondary terminal is formed in the upper part. However, as shown in FIG. 2
6 and the secondary terminals 27, 27 are formed in the lower portion 24 without any problem, and can be appropriately changed without departing from the spirit of the present invention.

As shown in FIG. 7, secondary terminals 37, 37 are provided on the side opposite to the primary terminals 35, 35 of the storage case 32.
Another secondary terminal 37, 37 connected to the terminal may be formed.

A second embodiment of the circuit breaker according to the present invention will be described with reference to FIGS.

The circuit breaker 41 is, as shown in FIGS. 8 and 9, one end 43a of the storage case 42 in the depth direction.
In addition, primary terminals 44, 44, 44, 44 are disposed on the lower side, and secondary terminals 45, 45 are disposed on the upper side. The primary terminals 44, 44, 44, 44 are screwless terminals and are formed so that two electric wires can be connected to one pole. Also, the other end 4 of the storage case 42 in the depth direction.
3b has secondary terminals 47, 47,
Openings 50,5 for insertion of branch bars 49,49 branched from main trunk bars 48,48,48 connected to 47.
0, and the openings 50, 50 are completely insulated from the inside of the circuit breaker 41.

As shown in FIG. 10, the distribution board 51 includes branch bars 49, 49 branched from three-wire main bars 48, 48, 48 connected to the secondary terminals 47, 47, 47 of the main breaker 46. Are provided two per circuit.

If a primary feed circuit is desired, branch bars 49, 49 are inserted into the openings 50, 50 of the circuit breaker 41, the circuit breaker 41 is mounted on the distribution board 51, and the primary side of the main breaker 46 is mounted. One ends of electric wires 53, 53 are connected to the terminals 52, 52, and the other ends are connected to primary terminals 44,
44 and connected. Then, the electric wires 54, 54 are connected to the secondary terminals 45, 45 of the circuit breaker 41 by terminal screws 55,
The connection is made by tightening and fixing at 55, and the electric wires 54, 54 are connected to an emergency circuit or the like. The position where the circuit breaker 41 is attached may be any circuit.

When there are a plurality of primary feed circuits, as shown in FIG. 11, one end of each of the wires 56, 56 is inserted and connected to another primary terminal 44, 44 formed on the circuit breaker 41. The other end is the primary terminal 4 of another circuit breaker 41
4 and 44 to perform primary feed.

In this embodiment, the primary terminal of the circuit breaker is formed so that four electric wires can be connected.
2, the primary terminals 64, 64 of the circuit breaker 61
There is no problem if it is formed so that only two wires can be connected to it, or it can be formed so that it can connect multiple wires.
Also, as shown in FIG. 13, there is no problem even if the secondary terminals 75, 75 of the circuit breaker 71 are formed with screwless terminals.
Changes can be made as appropriate without departing from the spirit of the present invention.

[0030]

As described above, according to the circuit breaker of the present invention, in a circuit breaker having at least a primary terminal and a secondary terminal in a storage case, the circuit breaker is provided at one end in the depth direction of the storage case. By arranging the primary terminal and the secondary terminal, there is an effect that the primary feed circuit can be easily formed at all positions of the plurality of circuits without the need for cutting the branch bar.

Also, in the circuit breaker, the primary terminal is disposed below and the secondary terminal is disposed above, so that the workability can be improved.

Further, in the circuit breaker, at least one of the primary terminal and the secondary terminal is formed of a screwless terminal, so that the workability can be improved.

Further, since two or more electric wires can be inserted into the screwless terminal, a primary feed circuit between branch breakers can be formed.

In the circuit breaker, an opening for inserting a branch bar is provided at the other end in the depth direction of the storage case, and the opening is insulated from the inside of the circuit breaker.
There is an effect that the work of cutting the branch bar is not required.

[Brief description of the drawings]

FIG. 1 is a front view showing a circuit breaker according to the present invention.

FIG. 2 is a side view showing a circuit breaker according to the present invention.

FIG. 3 is a front view showing a distribution board according to the present invention.

FIG. 4 is a front view showing a state where an electric wire is connected to the circuit breaker according to the present invention.

FIG. 5 is a front view showing a distribution board according to the present invention.

FIG. 6 is a side view showing a modified example of the circuit breaker according to the present invention.

FIG. 7 is a side view showing a modified example of the circuit breaker according to the present invention.

FIG. 8 is a perspective view showing a circuit breaker according to the present invention.

FIG. 9 is a side view showing a circuit breaker according to the present invention.

FIG. 10 is a front view showing a distribution board according to the present invention.

FIG. 11 is a front view showing a distribution board according to the present invention.

FIG. 12 is a perspective view showing a modified example of the circuit breaker according to the present invention.

FIG. 13 is a perspective view showing a modified example of the circuit breaker according to the present invention.

FIG. 14 is a front view showing a conventional distribution board.

FIG. 15 is a front view showing a conventional branch bar cutting method.

FIG. 16 is a front view showing a conventional distribution board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Circuit breaker 2 Storage case 3a End 3b End 4 Lower part 5 Primary terminal 6 Upper part 7 Secondary terminal 8 Main breaker 11 Branch bar 12 Opening 15 Electric wire 16 Terminal screw 17 Electric wire 18 Terminal screw 19 Electric wire

Claims (5)

[Claims] 1. A primary terminal at least in a storage case,
A circuit breaker having a secondary terminal, wherein the primary terminal and the secondary terminal are disposed at one end in a depth direction of the storage case. 2. The circuit breaker according to claim 1, wherein in the circuit breaker, the primary terminal is provided below, and the secondary terminal is provided above. 3. The circuit breaker according to claim 1, wherein in the circuit breaker, at least one of the primary terminal and the secondary terminal is formed of a screwless terminal. 4. The circuit breaker according to claim 3, wherein two or more electric wires can be inserted into said screwless terminal. 5. The circuit breaker, wherein an opening for inserting a branch bar is provided at the other end in the depth direction of the storage case, and the opening is insulated from the inside of the circuit breaker. The circuit breaker according to claim 1.