JP6287090B2 - Circuit breaker - Google Patents

Description

  The present invention relates to a circuit breaker such as a circuit breaker for wiring or an earth leakage breaker, and more particularly, a plug including a terminal block mounted on a switchboard and the like and a circuit breaker body having an external connection terminal that can be inserted into and removed from the terminal block. The present invention relates to an in-type circuit breaker.

  FIG. 8 shows a circuit diagram of the switchboard 1. Circuit breakers 2A, 2B, and 2C are connected to the branch circuits that branch from the power source and are connected to the loads A, B, and C, respectively. . Each circuit breaker 2A, 2B, 2C is connected to the main circuit contact 4 of the main circuit 3 and an overcurrent trip that operates the main circuit contact 4 in a trip state when an overcurrent flows through the main circuit 3 due to a short circuit accident or the like. It is a device provided with a device 5 and an auxiliary contact 6 of a contact (normally open contact) linked to the overcurrent trip device 5.

In the switchboard 1 of FIG. 8, in order to notify the outside that any of the circuit breakers 2A, 2B, 2C is in a trip state, the auxiliary contact 6 of the circuit breakers 2A, 2B, 2C of each branch circuit is connected. An alarm device 7 is connected in parallel. When any of the circuit breakers 2A, 2B, 2C is in a trip state and the auxiliary contact 6 of the circuit breaker is closed, the alarm device 7 emits an alarm sound, for example.
The circuit breaker arranged in the switchboard 1 employs a plug-in type circuit breaker in order to simplify the arrangement board, reduce the space, and simplify the attachment / detachment device (for example, Patent Documents 1 to 3). ).
As a structure of the plug-in type circuit breaker, a structure having a rectangular parallelepiped terminal block fixed in the panel of the switchboard 1 and a circuit breaker body detachably attached to each terminal block is known. .

  FIG. 9 shows a state in which the terminal blocks 8A, 8B, 8C are arranged on the switchboard 1 in the short length direction. The terminal blocks 8A, 8B, and 8C include terminal block cases in which terminal block power supply side terminals 9a and 9b and terminal block load side terminals 10a and 10b are provided inside both ends in the longitudinal direction. The insertion port 11 that opens toward the terminal block power supply side terminals 9a and 9b and the negative terminal block load side terminals 10a and 10b is formed. Terminal block auxiliary terminals 12a and 12b are provided at the center in the longitudinal direction of the terminal blocks 8A, 8B, and 8C and are exposed to the outside of the terminal block case while being aligned in the short direction.

  Power supply side wiring (not shown) is connected to the terminal block power supply side terminals 9a and 9b of the terminal blocks 8A, 8B, and 8C, and load side wirings of the loads A, B, and C are connected to the terminal block load side terminals 10a and 10b ( (Not shown) is connected. Further, the terminal block auxiliary terminals 12a and 12b of the alarm device 7 and the terminal blocks 8A, 8B, and 8C are connected by a plurality of auxiliary wirings 13a to 13f, thereby assisting the alarm device 7 with the terminal blocks 8A, 8B, and 8C. Contacts 6 are connected in parallel.

  Then, the main body power supply side external terminal and the main body load side external terminal which are connected to the main circuit contact 4 of the circuit breaker body and project outside from the lower part of the circuit breaker body are connected to the insertion ports of the terminal blocks 8A, 8B and 8C. 11 is inserted and engaged, the circuit breaker body is detachably attached to the terminal blocks 8A, 8B, 8C, the body power supply side external terminals are connected to the terminal block power supply side terminals 9a, 9b, and the body load side external The terminal is connected to the terminal block load side terminals 10a and 10b, and the main body auxiliary external terminal which is connected to the auxiliary contact 6 of the circuit breaker main body and protrudes outside from the lower part of the circuit breaker main body is the terminal block auxiliary terminal 12a. , 12b.

JP 2007-48601 A JP 2004-363066 A Japanese Patent Application Laid-Open No. 11-96861

By the way, the terminal block auxiliary terminals 12a and 12b of the terminal blocks 8A, 8B and 8C shown in FIG. 9 are connected in the direction (wiring direction) of the auxiliary wirings 13a to 13f (longitudinal direction) (terminal block power supply side terminals 9a and 9b). The direction of the terminal block auxiliary terminals 12a and 12b is set to the short direction, so that the auxiliary wirings 13a to 13f are connected to the alarm device 7 and the terminal block 8A. 8B and 8C are connected by a crossover wiring, and auxiliary wirings of different polarities (for example, auxiliary wirings 13b and 13e or auxiliary wirings 13c and 13f) are crossed.
As described above, when the auxiliary wirings 13a to 13f are connected between the alarm device 7 and the terminal blocks 8A, 8B, and 8C in a crossover and crossed state, the auxiliary wirings 13a to 13f are prevented in order to prevent wiring errors. Therefore, there is a problem in that it takes time and labor for wiring work.
Therefore, the present invention has an object to provide a plug-in type circuit breaker that can easily perform connection work when connecting a plurality of terminal blocks in parallel to an accessory device arranged in a panel. It is said.

In order to achieve the above object, a circuit breaker according to one aspect of the present invention includes a terminal block and a circuit breaker body having an external connection terminal that can be inserted into and removed from the terminal block. are arranged side by side a plurality on the board in such control panels, a circuit breaker plug-in that is connected to the accessory device disposed in the board within the terminal block, an orthogonal direction orthogonal to the arrangement direction A pair of terminal block auxiliary terminals are formed apart from each other, and one of the pair of terminal block auxiliary terminals includes a first main body side connection portion and a first attached side connection portion, and the pair of terminal block auxiliary terminals The other includes a second main body side connection portion and a second attachment side connection portion, and the first and second main body side connection portions are arranged at positions close to each other, and the first and second main body side connection portions are disposed . 2 supplied side connecting portion, it is arranged mutually spaced locations of the perpendicular direction The terminal block, the first wiring space which extends in a straight line from one end to the other end of the arrangement direction of the terminal block to a first region including the accessory-side connecting portion of the are formed, the A second wiring space that is a region including the second attachment side connection portion and extends linearly to both ends in the arrangement direction of the terminal blocks parallel to the first wiring space is formed and arranged In the plurality of arranged terminal blocks, the first wiring space of each terminal block is continuous in a straight line, and the second wiring space of each terminal block is continuous in a straight line, A pair of body auxiliary external terminals are formed on the bottom surface of the circuit breaker body, and a first linear wiring member is disposed in the first wiring space of the plurality of terminal blocks that are linearly continuous. And connecting the first attachment side connecting portion, in front of the plurality of terminal blocks that are continuous in a straight line A second linear wiring member is arranged in the second wiring space to connect the second attachment side connecting portion, and the end portions of the first and second linear wiring members are placed in the panel. When the plurality of circuit breaker bodies are attached to the plurality of terminal blocks by insertion of the external connection terminals, the pair of body auxiliary members of each circuit breaker body are connected to the accessory device arranged An external terminal is connected to the first and second main body side connecting portions .

  According to the circuit breaker according to one aspect of the present invention, the first linear wiring member is arranged in the first wiring space of the plurality of terminal blocks that are linearly connected to connect the first attachment side connection portion. Then, simply by performing a simple wiring work such as arranging the second linear wiring member in the second wiring space of the plurality of terminal blocks that are linearly connected and connecting the second attached side connection portion, Since multiple circuit breakers can be connected in parallel to the accessory device, it is not necessary to connect the wiring in the crossover state as in the conventional device, and the wiring mistake is reliably prevented. .

In the circuit breaker according to one aspect of the present invention, the terminal block may include the first and second linear wiring members between the first wiring space and the second wiring space. A partition wall is provided to ensure insulation.
According to the circuit breaker according to one aspect of the present invention, sufficient insulation can be ensured even when the non-insulating first and second linear wiring members are used.
In the circuit breaker according to one aspect of the present invention, the first and second attached side connection portions provided on the terminal block are opened and closed in conjunction with a trip operation of the circuit breaker body. Connect to the auxiliary contact that operates.
According to the circuit breaker according to one aspect of the present invention, the circuit breaker body can operate the attached device in conjunction with the trip operation.

Furthermore, the circuit breaker according to an aspect of the present invention is an alarm device that issues an alarm when any of the circuit breaker bodies arranged in a plurality of the attached devices in the panel performs a trip operation. It is.
According to the circuit breaker according to one aspect of the present invention, an alarm device can issue an alarm when an overcurrent flows in a circuit in which any circuit breaker is disposed due to a short circuit accident or the like.

  According to the circuit breaker according to the present invention, the first linear wiring member is arranged in the first wiring space of the plurality of terminal blocks that are linearly connected, and the first attachment side connecting portion is connected, By simply performing a simple wiring operation such as arranging the second linear wiring member in the second wiring space of the plurality of terminal blocks continuous in a straight line and connecting the second attachment side connecting portion, the auxiliary device Since a plurality of circuit breakers can be connected in parallel to each other, connection work can be easily performed when connecting a plurality of terminal blocks in parallel to an accessory device arranged in the panel.

1 is a perspective view showing a plug-in circuit breaker according to the present invention. It is the perspective view which showed the circuit breaker main body which comprises a circuit breaker from upper direction. It is the perspective view which showed the circuit breaker main body from the downward direction. It is the figure which showed the terminal block which comprises a circuit breaker by planar view. It is the top view which expanded and showed the structure of the terminal block auxiliary terminal provided in the terminal block. It is the perspective view which showed the terminal block from the side. It is a top view showing the state where a plurality of terminal blocks are arranged side by side in the short direction, and linear wiring is connected so as to cross the plurality of terminal blocks in the short direction. It is the circuit diagram which showed the state in which the auxiliary contact of the some circuit breaker was connected in parallel with the attachment apparatus arrange | positioned in the panel of a switchboard. It is a figure which shows the wiring of the conventional several terminal blocks.

DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the component same as the structure shown in FIG. 8, and the description is abbreviate | omitted.
FIG. 1 shows plug-in type circuit breakers 2A, 2B, and 2C arranged on a switchboard 1. A rectangular parallelepiped terminal block 20 fixed in the panel of the switchboard 1 and a terminal block 20 are attached to and detached from the terminal block 20. And a circuit breaker body 21 that is freely mounted. Also in this embodiment, the alarm device 7 is connected in parallel to the auxiliary contacts 6 of the plug-in circuit breakers 2A, 2B, 2C in the panel of the switchboard 1.

As shown in FIG. 2, the circuit breaker body 21 includes an opening / closing operation handle 22, a movable contact (not shown), a fixed contact (not shown), a contact opening / closing mechanism (not shown), and the main circuit shown in FIG. Circuit contact 4, overcurrent trip device 5 for operating the main circuit contact 4 in a trip state when an overcurrent flows in the main circuit 3 due to a short circuit accident, etc. a contact (normally open) linked to the overcurrent trip device 5 Auxiliary contact 6) is built in.
Further, as shown in FIG. 3, main body power supply side external terminals 23a and 23b and main body load side external terminals 24a and 24b project from the lower part of the circuit breaker main body 21, and these main body power supply side external terminals 23a. , 23b and main body load side external terminals 24a, 24b are provided so as to protrude main body auxiliary external terminals 25a, 25b.

As shown in FIG. 4, the terminal block 20 is provided with terminal block power supply side terminals 27a and 27b and terminal block load side terminals 28a and 28b protruding from the side surfaces of both ends of the rectangular parallelepiped terminal block case 26 in the longitudinal direction. In the terminal block case 26, an insertion port 29 is opened toward the terminal block power supply side terminals 27a and 27b and the terminal block load side terminals 28a and 28b.
In addition, terminal block auxiliary terminals 30 and 31 are provided in the longitudinal center of the terminal block case 26 so as to be separated from each other in the longitudinal direction of the terminal block case 26.

  As shown in FIG. 5, one terminal block auxiliary terminal 30 includes a main body side connection portion 30 a to which the main body auxiliary external terminal 25 a (see FIG. 3) contacts and connects, and the main body side connection portion 30 a to the terminal block power supply side terminal. 27a, 27b and an attachment side connection portion 30b extending to the side, and the attachment side connection portion 30b is provided with a screw hole (not shown), and is connected to the terminal block via the terminal screw 32 and the terminal washer 33. It is fixed to the case 26. The other terminal block auxiliary terminal 31 has the same shape as the one terminal block auxiliary terminal 30, and includes a main body side connecting portion 31a and an attached side connecting portion 31b extending to the terminal block load side terminals 28a and 28b. The attachment side connection portion 31b is provided with a screw hole (not shown), and is fixed to the terminal block case 26 via the terminal screw 32 and the terminal washer 33.

  Here, as shown in FIG. 5 and FIG. 6, the terminal block case 26 includes the main body side connection portions 30 a and 30 b between the main body side connection portion 30 a and the attachment side connection portion 30 b of one terminal block auxiliary terminal 30. The partition walls 34 and 35 which partition both except for the connection part of the attachment side connection part 30b are formed. In addition, in the region on the terminal block power supply side terminals 27a and 27b side from the partition walls 34 and 35, the first wiring that extends linearly to both ends in the short direction of the terminal block case 26 including the attachment side connection portion 30b. A working space 36 is formed.

  Further, the terminal block case 26 is provided between the main body side connection portion 31a and the attachment side connection portion 31b of the other terminal block auxiliary terminal 31 except for the connecting portion of the main body side connection portion 31a and the attachment side connection portion 31b. Partition walls 37 and 38 for partitioning are formed. In addition, in the region closer to the terminal block load side terminals 28a and 28b than the partition walls 37 and 38, the second wiring extending linearly to both ends in the short direction of the terminal block case 26 including the attachment side connection portion 31b. A working space 39 is formed.

Next, FIG. 7 shows that when the auxiliary contacts 6 of the three circuit breakers 2A, 2B, 2C are connected in parallel to the alarm device 7 in the panel of the switchboard 1, each circuit breaker 2A, 2B, The arrangement position of the 2C terminal block 20 and the wiring state of the terminal block 20 are shown.
As shown in FIG. 7, the terminal blocks 20 of the three circuit breakers 2 </ b> A, 2 </ b> B, 2 </ b> C are arranged in the short direction and fixed to the switchboard 1.
In the three terminal blocks 20 arranged side by side in the short direction, the first wiring space 36 provided on the terminal block power supply side terminals 27a, 27b side from the partition walls 34, 35 is linearly continuous in the short direction. At the same time, the second wiring space 39 provided on the terminal block load side terminals 28a, 28b side from the partition walls 37, 37 continues linearly in the short direction.

  A plate-like first bus bar 40 is disposed in a first wiring space 36 continuous in the short direction of the three terminal blocks 20, and the first bus bar 40 is connected to the attachment side connection portion 30 b of each terminal block 20. The terminal screw 32 and the terminal washer 33 are fixed. Further, a plate-like second bus bar 41 is arranged in a second wiring space 39 continuous in the short direction of the three terminal blocks 20, and this second bus bar 41 is connected to the attachment side of each terminal block 20. It is fixed with the terminal screw 32 and the terminal washer 33 of the part 31b. The alarm device 7 is connected to one end of the first and second bus bars 40 and 41.

  And with respect to the three terminal blocks 20 arrange | positioned in the switchboard 1 as mentioned above, the main body power supply side external terminals 23a and 23b of the circuit breaker main body 21 are inserted into the insertion ports 29 on the terminal block power supply side terminals 27a and 27b side. The circuit breaker body 21 is mounted on the terminal block 20 by inserting the body load side external terminals 24a, 24b of the circuit breaker body 21 into the insertion ports 29 on the terminal block load side terminals 28a, 28b side. The main body power supply side external terminals 23a and 23b are connected to the terminal block power supply side terminals 27a and 27b, the main body load side external terminals 24a and 24b are connected to the terminal block load side terminals 28a and 28b, and the circuit breaker main body 21 The main body auxiliary external terminals 25 a and 25 b are connected to the main body side connection portions 30 a and 31 a of the terminal block 20.

  As a result, as shown in FIG. 8, three circuit breakers 2A, 2B, 2C are arranged on the switchboard 1, and the auxiliary contacts 6 of these circuit breakers 2A, 2B, 2C are parallel to the alarm device 7. Connected to. When an overcurrent due to a short circuit accident flows through any of the circuit breakers 2A, 2B, 2C connected to the loads A to C, the main circuit contact 4 of the circuit breaker trips the overcurrent. A trip state is caused by the device 5 and the auxiliary contact 6 performs a closing operation, whereby the alarm device 7 emits an alarm sound.

  Here, the external connection terminals according to the present invention correspond to the main body power supply side external terminals 23a and 23b and the main body load side external terminals 24a and 24b, and the auxiliary device according to the present invention corresponds to the alarm device 7, and the present invention. The first attachment side connection portion according to the present invention corresponds to the attachment side connection portion 30b of the terminal block auxiliary terminal 30, and the second attachment side connection portion according to the present invention corresponds to the attachment side connection portion 31b of the terminal block auxiliary terminal 31. Correspondingly, the first linear wiring member according to the present invention corresponds to the first bus bar 40, and the second linear wiring member according to the present invention corresponds to the second bus bar 41.

Next, the effect of this embodiment will be described.
The three terminal blocks 20 constituting the circuit breakers 2A, 2B, and 2C of the present embodiment are provided with an attachment side connection portion 30b that is connected to the alarm device 7 when arranged in the short direction in the panel of the switchboard 1. The first wiring space 36 is continuous in a straight line in the short direction, and the second wiring space 39 having the attached side connection part 31b connected to the alarm device 7 is continuously in a straight line in the short direction. . The first bus bar 40 and the second bus bar 41 are disposed in the first wiring space 36 and the second wiring space 39 that are continuous in a straight line, and the attachment-side connecting portion 30b is connected to the first bus bar 40. The auxiliary contacts 6 of the circuit breakers 2A, 2B, 2C are connected in parallel to the alarm device 7 simply by connecting and connecting the attachment side connection part 31b to the second bus bar 41. be able to. This eliminates the need for crossover wiring as in the conventional apparatus, and wiring work in the crossed state, so that wiring mistakes are reliably prevented, and the circuit breakers 2A, 2B, 2C in the panel of the switchboard 1 are wired. Can be easily connected.

The first and second bus bars 40, 41 extending in parallel with each other between the three terminal blocks 20 are sufficiently provided with partition walls 34, 35, 37, 38 between them. Since the insulation distance is ensured, sufficient insulation can be ensured even when the first and second bus bars 40 and 41 that are non-insulating are used.
In the above-described embodiment, the plate-like first and second bus bars 40 and 41 are arranged in the first wiring space 36 and the second wiring space 39 that are linearly continuous in the short direction. The gist of the present invention is not limited to this. For example, a bar-shaped copper wire is arranged in the first wiring space 36 and the second wiring space 39, and the bar-shaped copper wire is connected to the terminal screw 32. The same effect can also be obtained by fixing to the attachment side connection portions 30b and 31b via the terminal washer 33.

Moreover, although the three circuit breakers 2A, 2B, and 2C have been described in the above embodiment, similar effects can be obtained even when other numbers of circuit breakers are used.
Furthermore, in the above embodiment, the alarm device 7 is connected in parallel to the auxiliary contact 6 of the circuit breakers 2A, 2B, 2C, but other accessory devices in place of the alarm device 7 may be adopted.
Furthermore, the plug-in type circuit breakers 2A, 2B, and 2C of the above-described embodiment are not limited to the switchboard 1, and may be disposed on a distribution board, a control board, or the like.

  DESCRIPTION OF SYMBOLS 1 ... Distribution board, 2A, 2B, 2C ... Circuit breaker, 3 ... Main circuit, 4 ... Main circuit contact, 5 ... Overcurrent tripping device, 6 ... Auxiliary contact, 7 ... Alarm device, 20 ... Terminal block, 21 ... Circuit breaker body, 22 ... Open / close operation handle, 23a, 23b ... Main body power supply side external terminal, 24a, 24b ... Main body load side external terminal, 25a, 25b ... Main body auxiliary external terminal, 26 ... Terminal block case, 27a, 27b ... Terminal block power supply side terminal, 28a, 28b ... Terminal block load side terminal, 29 ... Insert, 30, 31 ... Terminal block auxiliary terminal, 30a, 31a ... Main body side connection part, 30b, 31b ... Attached side connection part, 32 ... Terminal screw, 33 ... Terminal washer, 34, 35, 37, 38 ... Partition wall, 36 ... First wiring space, 39 ... Second wiring space, 40 ... First bus bar, 41 ... Second bus bar

Claims (5)

It is equipped with a terminal block and a circuit breaker body having an external connection terminal that can be inserted into and removed from this terminal block, and a plurality of units are arranged side by side in a panel such as a switchboard, distribution board, control panel, etc. A plug-in circuit breaker connected to the device,
The terminal block is spaced in an orthogonal direction orthogonal to the arrangement direction are formed a pair of terminal block auxiliary terminal, the one of the pair of terminal block auxiliary terminal, a first body-side connecting portion and the first The other side of the pair of terminal block auxiliary terminals is provided with a second main body side connection portion and a second auxiliary side connection portion, and the first and second main body side connection portions are , is disposed at a position close to each other, said first and second attachment-side connecting portion is disposed spaced apart from each other position in the perpendicular direction,
The terminal block is a region including the first attachment-side connecting portion, and is formed with a first wiring space extending linearly to both ends in the arrangement direction of the terminal blocks. A second wiring space that extends in a straight line to both ends of the terminal block in parallel with the first wiring space in a region including the two attachment side connection portions;
In the plurality of terminal blocks arranged side by side, the first wiring space of each terminal block continues in a straight line, and the second wiring space of each terminal block continues in a straight line. ,
A pair of body auxiliary external terminals are formed on the bottom surface of the circuit breaker body,
A first linear wiring member is arranged in the first wiring space of the plurality of terminal blocks that are linearly connected to connect the first attachment-side connecting portion,
A second linear wiring member is arranged in the second wiring space of the plurality of terminal blocks that are linearly connected to connect the second attachment side connection portion,
These ends of the first and second linear wiring members, along with being connected to the accessory device disposed in the inside panel,
When a plurality of the circuit breaker bodies are mounted on the plurality of terminal blocks by inserting the external connection terminals, the pair of body auxiliary external terminals of each circuit breaker body are on the first and second body sides A circuit breaker connected to a connection part .   The terminal block is characterized in that a partition wall for ensuring insulation of the first and second linear wiring members is provided between the first wiring space and the second wiring space. The circuit breaker according to claim 1. The partition wall partitions the first attachment-side connecting portion disposed in the first wiring space and the first main body-side connecting portion coupled to the first attachment-side connecting portion, and the second wiring-use connecting portion. 3. The circuit breaker according to claim 2, wherein the second attached side connecting portion disposed in the space is partitioned from the second main body side connecting portion connected to the second attached side connecting portion . The first and second attached side connecting portions provided on the terminal block are connected to auxiliary contacts that perform an opening / closing operation in conjunction with the tripping operation of the circuit breaker body. Item 4. The circuit breaker according to any one of Items 1 to 3 . 5. The circuit breaker according to claim 4, wherein the auxiliary device is an alarm device that issues an alarm when any of the circuit breaker bodies arranged side by side in the panel performs a trip operation. vessel.

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