JPH09163522A - Structure for switching voltage supplied to branching breaker of panel board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To switch voltage supplied to the respective breakers of panelboard with simple operations in a short time and reduce the occupied area of a switching structure to reduce the dimensions of the panelboard. SOLUTION: A connection terminal 9 provided on an L1 bus-bar 3 (or a connection terminal 13 provided on an L2 bus-bar 4) is connected to one of the terminals of each branching breaker B and a connection terminal 15 provided on each branching conductor piece 7 is connected to the other terminal of the branching breaker B. A conductive bolt 8 is inserted into the screw holes of the respective bus-bars 3, 4 and 5 from the above and tightened to bring the N bus-bar 5 in an electric continuity with each branching conductor piece 7. Or, each branching conductor piece 7 is brought in an electric continuity with the L2 bus-bar 4 (or L1 bus-bar 3). By implementing one of the above mentioned operations, a voltage supplied to each branching breaker B is switched.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-phase three-wire type distribution board for a house, wherein each branch breaker has 100V or 20V.
The present invention relates to a structure for supplying any voltage of 0 V. More specifically, the voltage supplied to each branch breaker is 100 V to 200 V by a simple operation in a short time.
(Alternatively, it relates to a supply voltage switching structure capable of switching from 200V to 100V).

[0002]

2. Description of the Related Art FIG. 1 shows a single-phase three-wire type distribution board for a house. A main breaker 2 and a plurality of branch breakers B, and three bus bar bars 3, 4, 5 of L1, L2, N connecting them are attached to a box body 1 of a distribution board. The L1 bus bar 3 supplies a voltage of + 100V, and the L2 bus bar 4 is-.
A voltage of 100 V is supplied, and each is attached to the box body 1 with a fixing bolt 6. The N bus bar 5 supplies the 0V neutral phase. Each branch breaker B can branch a voltage of either 100V or 200V. Conventionally, in the case of supplying a voltage of either 100 V or 200 V to each branch breaker in this type of distribution board, the following method has been used. (1) Each of L1, L2 and N bus bars for 100V and 20
Prepare two types for 0V and replace the connection terminals of each bus bar according to the supply voltage. (2) A common L, L2, and N bus bar for 100V and 200V is used, and a structure for switching the voltage is provided in this portion, and the voltage is switched by the structure. However, in the case of the method shown in (1), it is uneconomical to prepare two types of L1, L2, and N bus bars. Further, in the case of the method shown in (2), by providing the switching structure, the distance between each bus bar of L1, L2, N and each branch breaker becomes narrow, and the switching work of the connection terminal and the screw tightening work accompanying it are difficult. Met. Therefore, in order to perform the work, the branch breaker must be removed, which requires a lot of man-hours.

Therefore, as described in Japanese Utility Model Publication No. 64-4256 and Japanese Utility Model Publication No. 5-25907,
An application has been filed for easily switching the connection terminals in the above switching structure. The structure described in Japanese Utility Model Publication No. 5-25907 will be described with reference to FIG. A plurality of branch breakers B are arranged around the bus bars 51, 52 and 53 of L1, L2 and N, respectively. L1,
The L2, N bus bars 51, 52, 53 are arranged in a mutually insulated state. The N bus bar 53 is provided with a plurality of cutouts 53a. The L1 bus bar 51 is provided with a plurality of connection terminals 54 and a plurality of fixed terminals 55. Similarly, the L2 bus bar 52 is also provided with a plurality of connection terminals 56 and a plurality of fixed terminals 57.
The fixed terminals 55 and 57 have cutouts 55a and 57, respectively.
a are provided, and they are arranged so as to be flush with the cutout portions 53a of the N bus bar 53. One terminal of each branch breaker B is connected to the L1 bus bar 5
It is connected to either the connection terminal 54 of No. 1 or the connection terminal 56 of the L2 bus bar 52. The other terminal of each branch breaker B is connected to either the connection terminal 58 connected to the L1 bus bar 51 or the connection terminal 59 connected to the L2 bus bar 52. Each connection terminal 58, 59
A switching terminal 60 is provided in each of the above, and the switching terminal 60 is attached so as to be rotatable around the first fixing bolt 61. A female screw is provided at the end of the switching terminal 60, and is attached to each notch 53 a of the N bus bar 53 via the second fixing bolt 62. At this time, one terminal of each branch breaker B is supplied with a voltage of + 100V from the L1 bus bar 51, and the other terminal is supplied with a neutral phase of 0V from the N bus bar 53, so that the branch breaker B is supplied to the branch breaker B. Is supplied with a voltage of 100V.

Next, 200 V is applied to these branch breakers B.
A method of supplying the voltage of will be described. The first and second fixing bolts 61 and 62 are loosened, the switching terminal 60 is rotated in the direction of the arrow 63, and the terminal 60 is cut into the cutout portion 57a of the fixing terminal 57.
Connect to. At this time, one terminal of the branch breaker B is supplied with a voltage of + 100V from the L1 bus bar 51, and the other terminal is supplied with a voltage of -100V from the L2 bus bar 52. Therefore, the branch breaker B has 2
A voltage of 00V is supplied. By loosening the first and second fixing bolts 61 and 62 and rotating and fixing the switching terminal 60 in this manner, it was possible to switch between 100V and 200V. However, in this method, in order to rotate the switching terminal 60, the two fixing bolts 6
It took time and effort to loosen 1, 62 and turn the switching terminal 60, and then tighten it again. Further, it is necessary to provide a sufficient space for the switching portion. As a result, the area occupied by each of the L1, L2, N bus bars 51, 52, 53 and the switching terminal 60 is increased, and the distribution box 1 is enlarged.

[0005]

SUMMARY OF THE INVENTION In view of the problems of the conventional structure in which the voltage supplied to each branch breaker is switched, the present invention switches the voltage supplied to each branch breaker by a simple operation and in a short time. The challenge is to prevent the distribution box from becoming large.

[0006]

In order to solve this problem, the means adopted by the present invention is to provide a plurality of branch breakers in which three bus bars L1, L2 and N are arranged around them. Is a structure for switching the supply voltage to the branch breakers in the distribution board having a configuration in which they are electrically insulated so as to be able to select and supply one of two types of supply voltage with respect to , One terminal of each branch breaker,
L1 bus bar (or L2 bus bar) is connected and the other terminal is branched conductively arranged electrically insulated from the three bus bars L1, L2 and N. One of the branch conductive pieces and the N bus bar, or each of the branch conductive pieces and the L2 bus bar (or L1 bus bar) is connected by a conductive member inserted from above each bus bar. 2 for each branch breaker
The configuration is such that different types of voltages are supplied.

A voltage from the L1 bus bar (or L2 bus bar) is previously supplied to one terminal of each branch breaker capable of branching to two different voltages, and the other terminal has a branch conductive piece. Connected with. The branch conductive piece and the N bus bar are connected by inserting the conductive member. Since the voltage supplied from the N bus bar is a neutral phase of 0 V, each branch breaker has an L1 bus bar (or L
2 Bus bar only). Further, the branch conductive piece and the L2 bus bar (or the L1 bus bar) are connected by changing the position where the above-mentioned conductive member is inserted. In this way, each branch breaker is supplied with a voltage that is the sum of the voltage from the L1 bus bar (or L2 bus bar) and the voltage from the L2 bus bar (or L1 bus bar). In this way, two different voltages are supplied to each branch breaker.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail by way of examples. FIG. 1 is a front view of a distribution board having a supply voltage switching structure according to the present invention. FIG. 2 is a perspective view of the switching structure of FIG. FIG. 3 is an exploded perspective view of a part of the switching structure of FIG. FIG. 4 is a view on arrow P of FIG.
5 is a sectional view taken along line X ₁ -X ₁ of FIG. 4, and FIG. 6 is a sectional view taken along line X ₂ -X ₂ of FIG. 7 is a sectional view taken along the line Y ₁ -Y ₁ of FIG. 6, and FIG. 8 is a view taken in the direction of arrow Q of FIG. 4. FIG.
It is an operation explanatory view of the supply voltage switching structure concerning the present invention. Figure 10 is a Y ₂ -Y ₂ line sectional view of FIG. The present invention is characterized by a structure for selecting and supplying either 100 V or 200 V, and the other parts of the distribution board are configured as follows.
It is the same as that described in the item of "Prior Art". Therefore, the following description will be directed only to this characteristic part of the present invention.

As shown in FIG. 3, the supply voltage switching structure according to the present invention has L1, L2, N bus bars 3, 4, respectively.
5, a branch breaker B, the same number of branch conductive pieces 7, and a plurality of conductive bolts 8. As shown in FIGS. 2 to 5, the L1 bus bar 3 and the L2 bus bar 4 have a flat plate shape and are arranged such that their longitudinal directions are substantially parallel on the same plane. The L1 bus bar 3 is provided with a plurality of connection terminals 9 standing up at a predetermined interval in the longitudinal direction thereof, and each tip portion is formed at a substantially right angle from an approximately middle portion in the longitudinal direction toward the outside. It's bent. Similarly, on the back side of each connection terminal 9,
A plurality of fixed terminals 11 are provided upright, and each tip portion is bent at a substantially right angle from an approximately middle portion in the longitudinal direction toward the outside. These fixed terminals 1
1 is provided with a terminal hole 11a, and a conductive nut 12 is provided below them. Like the L1 bus bar 3, the L2 bus bar 4 is also provided with a plurality of connection terminals 13 and a plurality of fixed terminals 14 at predetermined intervals in the longitudinal direction, and each of the fixed terminals 14 is provided with a corresponding terminal. The conductive nut 12 is arranged below the hole 14a. These conductive nuts 12 are held in a rotation-stopped state. 2, 4 and 5 show the configuration in which the L1 bus bar 3, the L2 bus bar 4 and the conductive nuts 12 are attached to the insulating member Z ₁ . As shown in FIG. 5, each connection terminal 9 and each fixed terminal 11 provided on the L1 bus bar 3 and each connection terminal 13 and each fixed terminal 14 provided on the L2 bus bar 4 are alternately arranged. Therefore, the fixed terminals 11 and 14 are arranged so as not to contact each other. Therefore, L1 bus bar 3 and L
It is held in a state of being electrically insulated from the two-bus bar 4.

As shown in FIGS. 2 to 4 and 6, the same number of branch breakers B are provided above the L1 bus bar 3 and the L2 bus bar 4 at predetermined intervals along the longitudinal direction thereof. The branch conductive piece 7 is provided. Each of the branched conductive pieces 7 is provided with two terminal holes 7a and 7b, and the connection terminals 15 are provided at a substantially right angle downward from the vicinity of one of the terminal holes 7a. The tip portion of the connection terminal 15 of each branch conductive piece 7 is bent from the substantially middle portion in the longitudinal direction toward the outside at a substantially right angle. A conductive nut 12 is arranged below the other terminal hole 7b of each branch conductive piece 7. These conductive nuts 12 are held in a rotation-stopped state. As shown in FIG. 3, FIG. 6 and FIG. 7, each branch conductive piece 7 has a terminal hole 7a on one side thereof, and a terminal hole for each fixed terminal 14 provided on the L2 bus bar 4 (or L1 bus bar 3). 14a (or the terminal hole 11a of each fixed terminal 11) is attached so that it may be arrange | positioned above. Further, the connection terminal 9 of the L1 bus bar 3 (or the connection terminal 13 of the L2 bus bar 4) and the connection terminal 15 of each branch conductive piece 7 are arranged so as to have substantially the same height. The connection terminals 9 (or 13) and 15 form a pair and are connected to the respective terminals of each branch breaker B. 2, FIG. 4, FIG. 6 and FIG. 7 show a configuration in which each branch conductive piece 7 and each conductive nut 12 are attached to the insulating member Z ₂ . Each branch conductive piece 7 is embedded and attached to the insulating member Z ₂ . As shown in FIG.
Communication holes 16 are provided in the insulating member Z ₂ below the terminal holes 7a of the branched conductive piece 7. Further, a side plate 17 is erected on a substantially central portion of the upper surface of the insulating member Z ₂ , and the side plate 17 holds the insulation between the branched conductive pieces 7. The side plate 17 is provided so as to fit into a groove portion 18 provided on the lower surface of the insulating member Z ₃ mounted above the insulating member Z ₂ .
Therefore, the insulating member Z ₂ and the insulating member Z ₃ are not displaced, and the insulation between the respective branch conductive pieces 7 is more reliably maintained.

As shown in FIGS. 2 to 4 and 8,
Above the plurality of branch conductive pieces 7, the L1 bus bar 3 or L
N busbars 5 are arranged substantially parallel to the longitudinal direction of the two busbars 4. The N bus bar 5 is provided with a plurality of terminal holes 5a, and each terminal hole 5a corresponds to each branch conductive piece 7a.
It is arranged above one of the terminal holes 7b. Furthermore, N
Relief portions 5b are provided between the terminal holes 5a of the bus bar 5 and the terminal holes 5a, and the relief portions 5b are located above the respective terminal holes 7a of the branch conductive pieces 7. It is provided. 2, FIG. 4, FIG. 8 and FIG.
The configuration when the bus bar 5 is attached to the insulating member Z ₃ is shown. The N bus bar 5 is fixed to the insulating member Z ₃ , and each terminal hole 5a of the N bus bar 5 in the insulating member Z ₃ is fixed.
A communication hole 19 is provided in each of the lower portions of the.

Next, a method of supplying two different voltages to each branch breaker B using the supply voltage switching structure according to the present invention will be described. As shown in FIGS. 2 and 3, the connection terminal 9 of the L1 bus bar 3 (or the connection terminal 13 of the L2 bus bar 4) is connected to one terminal of each branch breaker B. Therefore, each branch breaker B
Is supplied with a voltage of + 100V (or -100V). The connection terminal 15 of each branch conductive piece 7 is connected to the other terminal of each branch breaker B. As shown in FIGS. 3 and 9, each conductive bolt 8 has an N bus bar 5
Through each terminal hole 5a and one terminal hole 7b of each branch conductive piece 7 and is screwed into each conductive nut 12. The N bus bar 5 and each branch conductive piece 7 are insulated by an insulating member Z ₃ arranged therebetween. By tightening each conductive bolt 8, the neck lower portion 8a of each conductive bolt 8 and the upper surface of the N bus bar 5 are brought into close contact with each other. Further, each conductive nut 12 is pulled upward and closely adheres to the lower surface of the branch conductive piece 7. As a result, the other terminal of each branch breaker B is electrically connected to the N bus bar 5. Since the voltage supplied from the N bus bar 5 is a neutral phase of 0V, the voltage supplied to each branch breaker B is 100V. That is, a voltage of 100 V is supplied to each branch breaker B.

Next, a method of supplying a voltage of 200 V to each branch breaker B will be described. The conductive bolt 8 is loosened and removed, and then inserted into the terminal hole 7a of the branch conductive piece 7 connected to one terminal of each branch breaker B from above and tightened. The conductive bolt 8 at this time is shown by a chain double-dashed line in FIGS. 3 and 9. As shown in FIGS. 3, 9 and 10,
Each conductive bolt 8 is connected to each terminal hole 7 of each branch conductive piece 7.
a and the terminal hole 14a of the fixed terminal 14 of the L2 bus bar 4 and are screwed to the respective conductive nuts 12. Each branch conductive piece 7 and each fixed terminal 14 of the L2 bus bar 4 are insulated by an insulating member Z ₂ arranged therebetween. By tightening each conductive bolt 8, the neck lower portion 8a of each conductive bolt 8 and the upper surface of the branch conductive piece 7 are brought into close contact with each other. Furthermore,
The conductive nuts 12 are pulled upward and come into close contact with the lower surfaces of the fixed terminals 14 of the L2 bus bar 4. As a result, one terminal of each branch breaker B is electrically connected to the L2 bus bar 4. The voltage supplied from the L2 bus bar 4 is (-100
V), the voltage supplied to each branch breaker B is 200V. That is, each branch breaker B has 20
A voltage of 0V is supplied.

As described in this embodiment, the N bus bar
-5 and each branch conductive piece 7, or each branch conductive piece 7 and L1 mother
Conductive member for connecting to the line bar 3 (or L2 bus bar 4)
The conductive nuts 12 are
Each branch conductive piece 7 or each fixed terminal 11 of the L1 bus bar 3
(Or close to the bottom of each fixed terminal 14 of the L2 bus bar 4)
N bus bar 5 and each branch conductive piece 7 or each branch conductive piece
7 and L1 bus bar 3 (or L2 bus bar 4)
Really connected. In addition, each insulating member Z₁, Z_Two, Z _Three Material
Use a distribution board by using thermosetting resin as
Can increase the heat resistance against the heat generated from time to time.
You. Further, in this embodiment, the L1 bus bar 3 and the L2 bus bar are
4, N bus bar 5 and each branch conductive piece 7 are insulating members.
Z₁, Z_Two, Z_Three It was explained as a form arranged in
Each of these components is in an electrically insulated state
Is required, and the insulating member Z is not always required.₁, Z_Two, Z_Three Using
It is not necessary to

As described above, the voltage supplied to each branch breaker B can be changed from 100V to 200V simply by changing the mounting position of each conductive bolt 8 corresponding to each branch breaker B.
(Or 200V to 100V). Since each conductive bolt 8 can be tightened from the direction perpendicular to the distribution board, workability is good.

[0016]

According to the present invention, two kinds of different voltages can be supplied to each branch breaker only by changing the mounting position of each conductive member corresponding to each branch breaker. Therefore, it is possible to switch the supply voltage to each branch breaker by a simple operation in a short time. Further, according to the present invention, since it is not necessary to rotate the switching terminal as in the "prior art", the area occupied by the switching structure can be reduced, and as a result, the size of the distribution board itself can be reduced. Can be made smaller.

[Brief description of the drawings]

FIG. 1 is a front view of a distribution board having a supply voltage switching structure according to the present invention.

FIG. 2 is a perspective view of the switching structure of FIG.

FIG. 3 is an exploded perspective view of a part of the switching structure of FIG.

FIG. 4 is a view on arrow P of FIG. 1;

5 is a sectional view taken along line X ₁ -X ₁ of FIG.

6 is a sectional view taken along line X ₂ -X ₂ of FIG.

7 is a cross-sectional view taken along the line Y ₁ -Y ₁ of FIG.

FIG. 8 is a view on arrow Q in FIG.

FIG. 9 is an operation explanatory view of the supply voltage switching structure according to the present invention.

10 is a cross-sectional view taken along line Y ₂ -Y ₂ of FIG.

FIG. 11 is a diagram illustrating a conventional method of switching the supply voltage from 100V to 200V.

[Explanation of symbols]

B: branch breakers Z ₁ to Z _3: insulating member 3: L1 busbar 4: L2 busbar 5: N busbar 7: branch conductive strip 7a: terminal holes 7b: the terminal hole 8: conductive bolt (conductive member) 9: Connection terminal 11a: terminal hole 12: conductive nut 13: connection terminal 14a: terminal hole 15: connection terminal

Claims (5)

[Claims] 1. L3, L2, and N three bus bars are provided so that any one of two kinds of supply voltages can be selected and supplied to each of a plurality of branch breakers arranged around them. A structure for switching a supply voltage to a branch breaker in a distribution board configured to be arranged substantially parallel to each other in an electrically insulated state, wherein one terminal of each branch breaker has an L1 bus bar (or an L2 bus bar). Bar) is connected to the other terminal, and a branch conductive piece arranged in an electrically insulated state from the three bus bars L1, L2 and N is connected to the other terminal. Conductive piece and N bus bar, or each branch conductive piece and L2
By connecting one of the busbars (or the L1 busbar) with a conductive member inserted from above each busbar, two different voltages are supplied to each branch breaker. A structure for switching a supply voltage to a branch breaker in a distribution board, which is characterized in that 2. The supply voltage switching structure for a branch breaker in a distribution board according to claim 1, wherein the conductive member is a bolt. 3. The branch in the distribution board according to claim 1 or 2, wherein each of the L1, L2, N bus bars and each branch conductive piece is disposed via an insulating member. Supply voltage switching structure for breaker. 4. The supply voltage switching structure for a branch breaker in a distribution board according to claim 3, wherein the insulating member is formed of a thermosetting resin. 5. A conductive nut is arranged below each terminal hole of each branch conductive piece, or below each terminal hole of the L1 bus bar (or L2 bus bar), and a conductive bolt is provided in each terminal hole. 5. The conductive nut is brought into close contact with each branched conductive piece or L1 bus bar (or L2 bus bar) by screwing the nut into each conductive nut via the and pulling the nut. A structure for switching the supply voltage to the branch breaker in the distribution board described in.