JP2006149118A - Interrupting device for low-voltage power distribution - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit breaker facility for low-voltage wiring wherein MCCBs are constructed in kits, and thus necessity for primary winding connection is obviated, addition of a single unit and replacement work can be easily carried out, operating time and power interrupting time required for additional installation work and replacement work are shortened, and the space for power switchboard can be saved. <P>SOLUTION: Individual parts are constructed in kits as base units 22, switch units 21, and end portion units 23L and 23R, and required units are combined and integrated. Thus, necessity for primary winding connection is obviated, and addition of a single unit and replacement work can be easily carried out. Operating time and power interrupting time required for additional installation work and replacement work can be shortened, and the space for power switchboard can be saved. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a low-voltage distribution circuit breaker comprising a plurality of low-voltage distribution circuit breakers used in a low-voltage power supply division circuit, a low-voltage distribution circuit, or the like.

  In the low-voltage power supply division circuit and the low-voltage distribution circuit, a plurality of distribution circuit breakers (hereinafter referred to as MCCB) molded with an insulating material are used for opening and closing the circuit and for interrupting current interruptions such as during a short circuit. Many proposals regarding the arrangement configuration have been made (for example, see Patent Document 1).

  For example, in the case where the power supply circuit is branched into a plurality of parts and each branch circuit is led out to the load side via the MCCB, the wiring configuration has conventionally been as shown in FIGS. In FIG. 8, the primary side wiring 12 for the upper terminals (hereinafter referred to as primary side terminals) of the plurality of MCCBs 11 is wired by a bus conductor or electric wire connected to a power source (not shown) and commonly connected. Further, secondary wirings 13 are individually connected to the illustrated lower terminals (hereinafter referred to as secondary terminals) of the plurality of MCCBs 11 and led out to corresponding load-side circuits.

  In FIG. 9, back stud terminals 14 are installed on the back side of the panel as shown in FIG. 9B as primary and secondary terminals of the MCCB 11 so that the wiring is not exposed to the front side of the panel. The primary side wiring 12 and the secondary side wiring 13 are connected to each other by using the stud terminal 14.

However, in such a wiring structure, when the MCCB 11 is added, removed, and replaced, installation work and primary-side wiring connection work are required, and much work time is required. For this reason, it is necessary to consider power outage time, and high-risk work has been forced due to time constraints. Also, there were times when there was no installation space, and it was difficult to install.
JP-A-6-121416

  As described above, in the prior art, a plurality of MCCBs are individually installed, and wirings for them are individually connected using electric wires or conductors. Therefore, work at the time of expansion, removal, replacement, etc. is complicated, and many work There was a problem of taking time.

  The purpose of the present invention is to make the MCCB into a kit so that the primary side wiring connection is not required, and a single unit can be easily added or replaced, and the work time associated with the expansion or replacement work can be reduced. Another object of the present invention is to provide a low-voltage wiring disconnecting device that can reduce the time of power outage and save space on the switchboard.

  The circuit breaker for low-voltage power distribution of the present invention has a primary side conductor provided with plug-type connection terminals at both ends, and a portion other than the both end connection terminals of the primary side conductor is covered with an insulating material, and the front surface In addition, a base unit in which an insertion-type branch terminal branched from the conductor is arranged, a contact for opening and closing between these terminals and a switching operation mechanism thereof are arranged between the primary side terminal and the secondary side terminal. Each part is covered with an insulating case having a back surface that can be joined to the front surface of the base unit, and the primary terminal is disposed on the back surface of the insulating case, and is connected to the branch terminal of the base unit. The switch unit is configured to be connectable, and is formed of an insulating material in a shape that can be connected to a side surface portion where the connecting terminal of the base unit is exposed. The base unit is connected to the connecting portion with the base unit. A connection terminal that can be connected in a plug-in manner with the connection terminal on the grid side, and an end unit provided with an external connection terminal that is conductively connected to the connection terminal on the other outer surface portion. Features.

  In the present invention, a plurality of base units are prepared, and the primary side conductors of these base units are electrically connected to each other by mutual connection of connection terminals provided on the side surfaces thereof.

  According to the present invention, each part is made into a kit by combining a base unit, a switch unit, and an end unit so that necessary units are combined and integrated, so that the primary side wiring connection becomes unnecessary, and a single unit is added or replaced. This makes it possible to reduce the work time, power outage time, and power distribution panel space required for expansion work and replacement work.

  Hereinafter, an embodiment of a low-voltage distribution cutoff device according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows the overall configuration of the low-voltage distribution cutoff device, FIGS. 2 and 3 show the assembly process of the low-voltage distribution cutoff device, and FIGS. 4 to 7 show the units constituting the low-voltage distribution cutoff device. The structure of is shown.

  In FIG. 1, the low-voltage power distribution cutoff device includes a switch unit 21, a base unit 22, end units 23 </ b> L and 23 </ b> R, and mounting rails 24 that support these units, and is connected to an external circuit 25.

  As shown in FIG. 5A (front side) and FIG. 5B (back side), the base unit 22 is formed in a substantially flat plate shape with an insulating material, and a primary side conductor (not shown) is formed inside. Arranged along the horizontal direction in the figure and embedded integrally. Plug-in connection terminals 31R and 31L each having a convex contact and a concave contact are provided at both ends of the primary conductor, and the primary conductor other than the connection terminals 31R and 31L is made of an insulating material. Covered by. Both side surface portions of the base unit 22 are formed so that the cross-sections thereof are stepped so that they can be connected to other base units. The connecting terminals 31R and 31L are connected to the staircase as shown in the figure. It is exposed to the part.

  Further, as shown in FIG. 5A, a plug-in type branch terminal 32 branched from a primary conductor (not shown) is disposed on the front surface of the base unit 22. Further, as shown in FIG. 5B, a groove 33 is formed on the rear surface of the base unit 22 along the horizontal direction in the figure, and the base unit 22 is engaged with the mounting rail 24 shown in FIG. The unit 22 is attached to the mounting rail 24.

  The switch unit 21 is attached to the front surface of the base unit 22 and has an insulating case, as shown in FIG. 4A (front side) and FIG. 4B (back side). Inside, an upper primary terminal and a lower secondary terminal are provided. Further, between the primary side terminal and the secondary side terminal in the case, a contact (two-pole contact in the example in the figure) for opening and closing these terminals and an opening / closing operation mechanism thereof are arranged. These parts are covered with the insulating case as described above except for the handle 35 of the opening / closing operation mechanism.

  The back surface of the case is formed in a planar shape that can be joined to the front surface of the base unit 22. As shown in FIG. 4B, a plug-in type primary side terminal 36 is disposed on the rear surface, and is configured to be plugged in and connected to the branch terminal 32 provided on the front surface of the base unit 22. ing.

  The end unit 23L is attached to the left side of the base unit 22, and is configured as shown in FIG. 6 (a) (front side) and FIG. 6 (b) (back side). The end unit 23L is entirely molded by an insulating material, and the right side as viewed from the front side, that is, the connection portion with the left side where the connection terminal 31L of the base unit 22 is exposed is connected to the left side. It is formed in a staircase shape so that it can. The connecting portion is provided with a connecting terminal 37L that is connected to the connecting terminal 31L on the base unit 22 side in a plug-in manner. Further, an external connection terminal 38L that is conductively connected to the connection terminal 37L by a conductor (not shown) is provided on the other outer surface portion of the end unit 23L, that is, the left side portion when viewed from the front.

  Further, as shown in FIG. 7A (front side) and FIG. 7B (back side), the end unit 23R has a shape substantially symmetrical to the end unit 23L. Mounted on the right side. The end unit 23R is entirely molded by an insulating material, and the right side as viewed from the back side, that is, the connection portion with the right side where the connection terminal 31R of the base unit 22 is exposed is connected to the right side portion. It is formed in a staircase shape so that it can. The connecting portion is provided with a connecting terminal 37R that is connected to the connecting terminal 31R on the base unit 22 side in a plug-in manner. Further, an external connection terminal 38R that is conductively connected to the connecting terminal 37R by a conductor (not shown) is provided on the other outer surface portion of the end unit 23R, that is, the right side portion when viewed from the front.

  Further, as shown in FIGS. 6B and 7B, groove portions 39L and 39R are formed on the rear surfaces of the end units 23L and 23R along the horizontal direction shown in FIG. The end units 23 </ b> L and 23 </ b> R can be attached to the attachment rail 24 by engagement with the attachment rail 24.

  Next, the assembly process of the low-voltage distribution circuit breaker equipment having the above-described configuration will be described with reference to FIGS.

  First, the required number (here, three) of base units 22 and end units 23L and 23R provided at both ends thereof are prepared, and the grooves 33 and 39L and 39R provided on the back surfaces thereof are attached to the mounting rail 24. And are arranged along the mounting rail 24.

  For example, as shown in FIG. 2, after the end unit 23 </ b> L is attached to the attachment rail 24, the first base unit 221 is attached to the attachment rail 24. At this time, the connection terminal 31L of the base unit 221 shown in FIG. 5B and the connection terminal 37L provided at the connection portion of the end unit 23L are inserted and connected. By this connection operation, the end unit 23L and the first base unit 221 are integrally connected as shown in FIG. In this state, a primary conductor (not shown) in the base unit 221 is conductively connected to the external connection terminal 38L via the connection terminals 31L and 37L.

  Next, the second base unit 222 is attached to the mounting rail 24. The connection terminal 31L of the second base unit 222 shown in FIG. 5B and the first base unit 221 shown in FIG. The connecting terminal 31R shown in FIG. By this connection operation, the first base unit 221 and the second base unit 222 are integrally connected as shown in FIG. In this state, a primary side conductor (not shown) in the second base unit 222 is conductively connected to a primary side conductor (not shown) in the first base unit 221.

  Next, by the same operation, the third base unit 223 is connected to the second base unit 222 as shown in FIG. 3, and finally the end unit 23L is connected to the right side of the third base unit 223 in the figure. Are integrally connected to each other. At this time, the connection terminal 31R shown in FIG. 5A of the third unit base 223 and the connection terminal 37R shown in FIG. 7B of the end unit 23R are inserted and connected.

  By the above connecting operation, the three base units 221, 222, and 223 and the end units 23L and 23R on both sides are integrally connected along the mounting rail 24 as shown in FIG. In addition, primary conductors (not shown) in the base units 221, 222, and 223 are connected in series between the external connection terminals 38L and 38R of the end units 23L and 23R.

  Next, the switch unit 21 is attached to the front of each base unit 221, 222, 223, respectively. That is, as shown in FIG. 4B, the plug-in type primary side terminal 36 and the base units 221, 222, and 223 are provided on the back surface of the switch unit 21. Are connected to a plug-in type branch terminal 32 provided on the front side. By this assembling operation, the corresponding switch units 21 are integrally connected to the front surfaces of the base units 221, 222, and 223, respectively.

  By the above connecting operation, the primary side terminal 36 of each switch unit 21 is connected to the primary side conductor (not shown) in the base units 221, 222, and 223 via the branch terminal 32. Therefore, as shown in FIG. 1, when the external wiring 25 connected to a power supply circuit (not shown) is connected to the external connection terminal 38 </ b> L, power is applied to the primary side of each switch unit 21. Therefore, if the switching contact (not shown) is turned on by operating the handle 35, the power is supplied to the secondary terminal (not shown) provided at the lower part of the switch unit 21, and the power supply is supplied to the secondary terminal (not shown) connected to the secondary terminal. Power is supplied to the load side (not shown) via the secondary side wiring.

  The secondary wiring is not shown in particular, but if it is individually connected to the secondary terminal with a protective cover at the bottom of the switch unit shown in FIG. 1 or FIG. 4A, the charging part may be exposed to the outside. And safety is improved.

  In FIG. 1, nothing is connected to the external connection terminal 38R of the end unit 23R, but of course, external wiring to other equipment that requires power supply may be connected.

Here, the secondary wiring is configured to be individually connected to each switch unit 21 as described above. With this configuration, when the switch unit 21 is removed, it is necessary to disconnect the secondary side wiring. If the contact is accidentally turned on during connection, or if the contact is turned on. Even if it is connected, power can not be accidentally transmitted to the load, and work can be performed more safely.In addition, when replacing by adding a line or changing the capacity, the work of separating the wiring on the primary side is not necessary. The switch unit 21 can be easily added or replaced, and the working time can be shortened.

  Thus, each base unit 22 does not require a conventional drilling process, can be easily attached, and does not require a conventional primary side wiring. That is, the primary side is wired by connecting the end units 23L and 23R and the base units 22, and the switch unit 21 is connected to the base unit 22 to enable the primary side connection. Can be expanded.

  The switch unit 21 can be easily mounted and connected by connecting the plug-in type primary side terminal and the branch terminal 32 of the base unit 21. Conventionally, it is not necessary to perform the wire separation work on the primary side, which is necessary when replacing the MCCB for capacity change or the like, and the replacement work is facilitated.

  Further, in the conventional MCCB, as shown in FIGS. 8 and 9, each connection portion of the primary side wiring 12, the secondary side wiring 13, and the back stud terminal 14 is a charging exposed portion. According to the form, the charged part is not exposed except for the external connection terminals 38L and 38R and the secondary side connection terminal (both have a protective cover), and can be used safely compared to the conventional type.

  By making the base unit, the primary side wiring is not required, so the space for the switchboard can be saved.

  Because of the above characteristics, there was a risk of work time and partial hot-wire work due to restrictions on power failure time, etc. when adding or replacing a conventional MCCB. The time can be shortened, and the power failure time can be shortened, and the risk can be reduced. Moreover, since the space can be saved, the mounting capacity can be increased.

It is a perspective view which shows one Embodiment of the circuit breaker installation for low voltage | pressure distribution by this invention. It is a perspective view explaining the attachment operation | work of the base unit and end part unit in one embodiment same as the above. It is a perspective view explaining the attachment operation | work of the switch unit in one Embodiment same as the above. The switch unit in one embodiment same as the above is shown, (a) is a front perspective view, and (b) is a back perspective view. The base unit in one Embodiment same as the above is shown, (a) is a front perspective view, (b) is a back perspective view. The one end part unit in one Embodiment same as the above is shown, (a) is a front perspective view, (b) is a back perspective view. The other edge part unit in one Embodiment same as the above is shown, (a) is a front perspective view, (b) is a back perspective view. It is a front perspective view of a conventional device. The other conventional apparatus is shown, (a) is a front perspective view, (b) is a back perspective view.

Explanation of symbols

21 Switch unit 22 Base unit 23R, 23L End unit 31R, 31L Connection terminal 32 Branch terminal 36 Primary side terminal 37L, 37R Connection terminal 38L, 38R External connection terminal

Claims (2)

A primary-side conductor having plug-type connection terminals at both ends, a portion other than the both-end connection terminals of the primary-side conductor is covered with an insulating material, and a plug branched from the conductor on the front surface A base unit with an expression branch terminal,
A contact for opening / closing between these terminals and an opening / closing operation mechanism thereof are arranged between the primary side terminal and the secondary side terminal, and each of these parts is covered with an insulating case having a back surface that can be joined to the front surface of the base unit. And the primary side terminal is disposed on the back surface of the insulating case, and is configured to be plugged and connectable with the branch terminal of the base unit; and
The base unit is formed of an insulating material in a shape that can be connected to a side surface portion where the connection terminal is exposed, and the connection portion to the base unit can be connected to the connection terminal on the base unit side in a plug-in manner. An end unit provided with an external connection terminal conductively connected to the connection terminal on the other outer surface portion,
A circuit breaker for low-voltage power distribution.   2. A plurality of base units are prepared, and the primary side conductors of the base units are electrically connected to each other by connection of connecting terminals provided on the side surfaces thereof. Low-voltage power distribution device.

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