JP4674855B2 - Wire lead-in structure to the housing - Google Patents

Description

  The present invention relates to a structure for drawing an electric wire into a casing for connecting a main breaker or bus bar installed in the casing to an input power line.

A conventional wire lead-in structure to a housing is such that an input power line is drawn into the housing from a hole provided in the housing and connected to a main breaker or a bus bar (for example, see Patent Document 1).
JP-A-7-241006

  However, in this conventional type, it is necessary to connect the input power line to the main breaker and bus bar inside the case, so it is necessary to provide extra space inside the case for connection work and wiring. As a result, there is a problem that the entire casing is increased in size. In addition, the wiring work inside the housing has a limited space and is not workable.

  An object of the present invention is to solve the conventional problems as described above and to provide a structure for drawing an electric wire into a casing that facilitates connection between a breaker or bus bar installed in the casing and an input power line.

The electric wire lead-in structure to the housing of the present invention is a housing in which the power supply side connection terminal of the breaker or bus bar installed in the housing and the power supply conductive bar for connecting the input power line is projected outside the housing. The power supply side connection terminal is housed in a conductive bar case attached to the back surface of the housing, and the conductive bar case is provided with a wire inlet and has a side surface opened. The structure according to claim 1, further comprising: a case main body and a cover member that covers the opening; and further, the power-side connection terminals of each phase are arranged at different positions in the depth direction of the housing . It is an invention.

Then, in the invention described in the claim 1, in which the invention described what is provided with an insulating partition wall between the power supply lead-conductive bar of each phase in claim 2.

According to the first aspect of the present invention, the wire lead-in structure to the housing projects the power supply side connection terminal of the breaker or bus bar installed in the housing and the power supply conductive bar connecting the input power line to the outside of the housing. Since the input power supply line only needs to be connected to the power supply side connection terminal that protrudes to the outside, there is no need for extra space for connection work and wiring. There is no need to increase the overall size, and there is an advantage that it can be installed in a narrow space, and the material cost of the housing can be reduced. Furthermore, since the connection work is performed outside the housing that allows a large work space, the work is easy. Furthermore, since the power supply side connection terminals for each phase are arranged at different positions in the depth direction of the housing, the connection work is further facilitated.

Then, the electric wire pull structure to housing according to claim 2, by providing an insulating partition wall between the power supply lead-conductive bar of each phase, the input power source line connected to each phase of the power source side connection terminal Even if the size of the attached crimping terminal is large and the interval between the crimping terminals becomes narrow, sufficient insulation can be secured.

  Next, a preferred embodiment of the present invention will be described with reference to the drawings.

[First Embodiment]
First, a unit type distribution board constituted by combining a plurality of breaker units composed of a small casing shown in FIGS. 1 to 7 will be described.
Reference numeral 1 denotes a breaker unit. As shown in FIG. 2, the breaker unit 1 has a breaker 2 attached to a breaker mounting base 11a of a housing 11, and the breaker mounting base 11a has a hinge portion. An inverted box-shaped lid 11b that can be opened and closed is provided. The lid 11b may be removable without being hinged, or the breaker mounting base 11a may be a box and the lid 11b may be a plate.

  Further, as shown in FIG. 3, a trunk bar case 13 is provided on the lower surface of the breaker mounting base 11 a, and a short is connected from one end surface side of the trunk bar case 13 to the primary side or the secondary side of the breaker 2. The connecting plug terminal portion 14a of the bus bar 14 is stretched, and the plug terminal receiving portion 14b for fitting the plug terminal portion having the same shape as the connecting plug terminal portion 14a inside the other end surface facing the one end surface side is provided. It is provided on the short bus bar 14. Further, the short bus bar 14 is provided with a plug terminal receiving portion 14c for holding a plug terminal 81 projecting from a lower end surface of the plug-in adapter 8 described later. The trunk bar case 13 includes a shallow box-shaped trunk bar case main body 13a that houses the short bus bar 14 and a lid portion 13b that closes an upper opening of the trunk bar case main body 13a. Is located on the lower surface of the breaker mounting base 11a, and a part of the lid 13b is integrated with the breaker mounting base 11a.

  As shown in FIG. 4, the trunk bar case 13 has an end surface side where the connection plug terminal portion 14 a of the short bus bar 14 is stretched, the length of the plug terminal portion 14 a from the one end surface side of the housing 11. Of the casing 11 in which the upper end side of the connection plug terminal portion 14a has a bowl-like shape. It is assumed that it is covered by one end surface side.

  Further, as shown in FIG. 5, the lid portion 13 b on the other end surface side facing the one end surface side of the main bar case 13 is exposed from the lower side on the other end surface side of the housing 11, so that the plug terminal receiving portion 14 b is attached to the lid. If it is provided so as to face the cut hole 13c provided from the upper side of the portion 13b, it is easy to connect the connection plug terminal portion 14a and the plug terminal receiving portion 14b of each short bus bar 14 of the breaker unit 1 adjacent to each other. In addition, since the connection plug terminal portion 14a is not exposed, insulation can be ensured.

  As shown in FIGS. 6 and 7, the breaker 2 includes a plug terminal 81 that is mounted on the plug-in adapter 8 and is connected to the primary side terminal portion so as to project from the lower end surface of the plug-in adapter 8. The connection between the breaker 2 and the short bus bar 14 is made to pass through the insertion hole formed in the base 11a and the lid portion 13b and sandwiched between the clip-shaped plug terminal receiving portions 14c provided on the main bar 14 and plug terminals. 81. In addition, the plug terminal 81 may be directly provided on the back surface of the breaker 2 without using the plug-in adapter 8. Moreover, you may connect the breaker 2 and the short bus-bar 14 by means, such as screwing, with a covered electric wire irrespective of a plug-in.

  On the other hand, as shown in FIG. 1, reference numeral 100 denotes a unit mounting rail on which a plurality of breaker units 1 can be detachably mounted. The unit mounting rail 100 is a self-supporting type in which a U-shaped rail main body 101 with an outer casing 101a is erected in a vertically long direction on a base 102, but the rail main body 101 can be attached to a building without providing a base. It may be attached to a wall surface or a pillar.

  Moreover, the breaker unit 1a located at the uppermost part of the unit mounting rail 100 is a breaker unit for a main breaker. As shown in FIG. 8, a plate-shaped breaker mounting base 11a for mounting the main breaker 2a and A shallow box-shaped main bar for installing a short bus bar 14 on the back side of the breaker mounting base 11a in a casing 11 comprising an inverted box-shaped lid 11b covering the front surface of the breaker mounting base 11a A case 13 is provided. As shown in FIG. 9, the short bus bar 14 is connected to the load side terminal portion 21 of the main breaker 2a by the conductive bar 12, and the end of the short bus bar 14 is connected to the main bar case 13 side. A unit-type distribution board is configured by providing a clip-like connection portion 14b facing a through hole provided in the face plate and connecting the connection plug terminal portion 14a of the breaker unit 1 described above.

  Then, the breaker unit 1 is connected below the main breaker unit 1a by connecting the plug terminal portion 14a and the plug terminal receiving portion 14b of each short bus bar 14 that is adjacent to the breaker unit 1 in sequence. If it is attached to, branch breakers can be added according to the required number of circuits. Moreover, the addition of the breaker for branching can be performed by attaching the breaker unit 1 to the unit mounting rail 2 which has a small number of parts, has a simple structure and can be manufactured at low cost, and thus has an effect of reducing initial investment. In addition, since the breaker 2 is housed in the casing 11 and each short bus bar 14 is stored in the main bar case 13, the conductive portion is not exposed and the safety and security are excellent. Further, when the number of branch breakers is reduced, the breaker unit 1 can be removed without leaving an unnecessary conductive portion, so that post-processing such as insulation treatment is unnecessary.

  Next, a description will be given of a structure for drawing an electric wire into a unit type distribution board in which a plurality of such breaker units 1 are combined.

  As shown in FIGS. 8 to 15, three power-side terminal portions 22 of the main breaker 2 a and three input power lines 4 corresponding to the three power-side terminal portions 22 of the main breaker 2 a are provided outside the back side of the main case 11 for the main breaker. The power supply side connection terminals 5a of the three power supply lead-in conductive bars 5 for connecting the two are protruded. Each of the three power supply lead-in conductive bars 5 is provided with a load side connection terminal 5b connected to the power supply side terminal portion 22 of the main breaker 2a and the power supply side connection terminal 5a on both sides. The part is stored in the conductive bar case 6.

  The conductive bar case 6 includes a case main body 61 having an open side surface that protrudes from the rear surface of the housing 11 and a cover member 62 that covers the opening. A position where the power supply lead-in conductive bar 5 located in the upper side is long and downward so that the three power supply lead-in conductive bars 5 are parallel to the upper and lower sides of the case body 61 and the power supply side connection terminals 5a are different in the length direction. It is arranged so as to be short. As a result, it is possible to easily draw the input power supply line 4 from the inlet 63 provided at the lower end of the conductive bar case 6 to each power supply side connection terminal 5a without interference of the other power supply lead conductive bars 5. .

  Further, as shown in FIG. 16, the conductive bar case main body is provided with an insulating partition 7 between the phases of the power supply lead-in conductive bar 5 protruding to the outside of the casing 11. The insulating partition wall 7 includes two insulating horizontal plate portions 71 and 71 interposed between the upper and middle power supply lead-in conductive bars 5 and 5 and between the intermediate and lower power supply lead-in conductive bars 5 and 5. Insulating side plates 72, 72 that cover the side surfaces of the upper and middle power supply conductive bars 5, 5 are integrated, and only the power supply side connection terminal 5a of each power supply conductive bar 5 is exposed. Yes. And the groove part 71a is provided in the front end side lower side of each insulation horizontal board part 71 and 71, and the vertical insulation board 73 is attached to this groove part 71a so that attachment or detachment is possible.

  In addition, in the electric wire drawing structure of the housing | casing of the said embodiment, although the distribution board which connected several breaker units incorporating the short bus-bar was demonstrated, this invention is not limited to this. Of course, the power supply lead-in conductive bar may be directly connected to the bus bar without installing the main breaker.

  In this configuration, the power supply side connection terminal 5a of the power supply lead-in conductive bar 5 that connects the main circuit breaker 2a installed in the main unit casing 11 and the input power source line 4 is provided outside the casing 11. Since it is provided so as to protrude, the input power supply line 4 only needs to be connected to the power supply side connection terminal 5a provided so as to protrude outside, so that extra space for connecting work and wiring in the housing Therefore, it is not necessary to increase the size of the entire casing. Further, since the connection work of the input power supply line 4 is performed outside the housing 11, the work is also easy.

[Second Embodiment]
Next, a second embodiment will be described with reference to a structure for drawing an electric wire into a case of an integrated distribution board in which a main breaker and a branch breaker are installed in the same case shown in FIGS.
Reference numeral 1 denotes a housing of a distribution board. As shown in FIG. The bus bar 3 is provided with a plurality of branch breakers 9 mounted on a plug-in adapter 8 having a plug terminal 81 on the bottom as shown in FIG. 19, and the power supply side terminal of the branch breaker 9 is a plug. The plug terminal 81 is electrically connected through a conductive bar embedded in the in-adapter 8.

  As shown in FIG. 17, the main breaker 2 a is disposed at the uppermost end of the bus bar 3, and the load side terminal portion of the main breaker 2 a is connected to the bus bar 3. Then, the power supply side connection terminals 5a of the three power supply lead-in conductive bars 5 for connecting the three power supply side terminal portions 22 of the main breaker 2a and the three input power supply lines 4 corresponding thereto are provided. It is provided so as to protrude from the back surface of the body 11 through a through hole. This power supply lead-in conductive bar 5 is provided with a load side connection terminal 5b connected to the power supply side terminal portion 22 of the main breaker 2a and the power supply side connection terminal 5a on both sides as in the first embodiment. The portion protruding from the housing 11 is stored in the conductive bar case 6.

  Similarly to the first embodiment shown in FIG. 16, the conductive bar case 6 can be freely opened and closed by a case body 61 having a side surface opened by attaching to the back surface of the housing 11 and a hinge that covers the opening. The cover member 62 is included. Then, the upper power lead-in conductive bar 5 is long and goes downward so that the three power-drawn conductive bars 5 are parallel to the top and bottom of the case body 61 and the power-side connection terminals 5a are different in the length direction. It is arranged short. As a result, it is possible to easily draw the input power supply line 4 from the inlet 63 provided at the lower end of the conductive bar case 6 to each power supply side connection terminal 5a without interference of the other power supply lead conductive bars 5. .

  In addition, the connection between the load side terminal portion of the main breaker 2 and the bus bar 3 is carried by mounting the main breaker 2 on the plug-in adapter 8 having the plug terminal 81 on the bottom surface, and the load side terminal portion is connected to the plug-in adapter. The knife-like plug terminal 81 is electrically connected to the plug terminal 81 through the conductive bar embedded in 8, and is connected to the clip-like plug terminal receiver 32 provided on the bus bar 3. However, it may be connected by a lead bar regardless of the plug terminal 81.

  Further, the bus bar 3 may be a three-layered type in which the bus bar 3 is disposed in parallel on the back and front of the housing 11, and in this case, the branch breaker has a lateral groove provided with a power supply side terminal portion on the front side of the branch breaker. A clip-like plug-in terminal attached to the bus bar 3 is connected to the bus bar 3 so as to be sandwiched from the lateral direction. On the other hand, the main breaker also has a load-side terminal portion configured to be a similar plug-in terminal. The power supply side terminal portion is connected to the power supply lead-in conductive bar 5 as described above and connected to the input power supply line.

  In this configuration, the power supply side connection terminal 5a of the power supply lead-in conductive bar 5 for connecting the main circuit breaker 2 installed in the housing 11 and the input power supply line 4 is provided so as to protrude outside the housing 11. Therefore, since the input power supply line 4 has only to be connected to the power supply side connection terminal 5a provided so as to protrude outside, it is not necessary to provide a terminal block in the case, so that it is necessary to enlarge the entire case. Therefore, there is an advantage that it can be installed in a narrow space, and the material cost of the housing can be reduced. Further, since the connection work is performed outside the housing, the work is easy.

It is a perspective view which shows 1st Embodiment. It is a perspective view which opens the cover and shows the breaker unit of 1st Embodiment. It is a perspective view which shows the main bar bar case main body and short bus bar of the breaker unit of 1st Embodiment. It is the perspective view which looked at the breaker unit of 1st Embodiment from the back side of the plug terminal part. It is the perspective view seen from the lower part which shows the process of adding the breaker unit of 1st Embodiment. It is the perspective view which looked at the breaker unit of 1st Embodiment from the front side which shows the state which opened the cover and removed the breaker. It is the perspective view which looked at the breaker unit of 1st Embodiment from the back side which shows the state which opened the cover and removed the breaker. It is a perspective view which removes the power-source side terminal cover of a main breaker, and shows a 1st Embodiment from the lower part after opening a cover part. It is a perspective view which extracts and shows the inside of a trunk bar case and the conductive bar for power supply drawing. It is a perspective view which removes the power source side terminal cover of a main circuit breaker, and shows a 1st embodiment from the upper part after opening a cover part. It is a schematic sectional drawing which removes a cover part and shows 1st Embodiment. It is a perspective view which closes a cover part and shows 1st Embodiment. It is a perspective view which opens a cover part and shows 1st Embodiment. It is the perspective view seen from the front side which shows the state attached to the self-supporting unit attachment rail. It is the perspective view seen from the back side which shows the state attached to the self-supporting unit attachment rail. It is a perspective view which shows the electrically-conductive pull-in conductive bar and the electrically-conductive pull-in conductive bar case. It is a perspective view which shows 2nd Embodiment. It is a perspective view which shows the bus-bar and branching breaker of 2nd Embodiment. It is a perspective view which shows the plug-in adapter carrying the branch breaker of 2nd Embodiment. It is a perspective view which shows the principal part of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Breaker unit 11 Housing | casing 12 Conductive bar 13 Trunk bar case 14 Short bus bar 2 Breaker 2a Master breaker 3 Bus bar 4 Input power supply line 5 Power supply lead conductive bar 5a Power supply side connection terminal 6 Conductive bar case 7 Insulating partition 100 Unit mounting rail

Claims (2)

A wire lead-in structure to the housing provided by projecting the power supply side connection terminal of the power supply lead-in conductive bar that connects the breaker or bus bar and the input power line installed in the housing to the outside of the housing,
The power supply side connection terminal is stored in a conductive bar case attached to the rear surface of the housing, and a case body having a wire opening and a side opening in the conductive bar case, and a cover for covering the opening. A structure for drawing an electric wire into a casing , wherein the power supply side connection terminals of each phase are arranged at different positions in the depth direction of the casing. Wire pull structure to housing according to claim 1 which is provided with an insulating partition wall between the power supply lead-conductive bar of each phase.

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