JP3330047B2 - Circuit breaker and distribution board provided with the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker and a distribution board provided with the circuit breaker.

[0002]

2. Description of the Related Art A distribution board for a single-phase three-wire system generally comprises a main breaker, and three pole bars consisting of two voltage pole bars and one neutral pole bar connected to the main breaker. ,
A circuit breaker as a branch breaker connected to this pole bar is housed in a housing. Usually, three pole bars are arranged at the center in the width direction of the housing, and a plurality of pole bars are provided on both sides of each of these pole bars. There are two circuit breakers. Of the three pole bars, the neutral pole bar is located at the center, and the voltage pole bars are arranged on both sides of the neutral pole bar. Each circuit breaker has a voltage pole bar located closer to the neutral pole bar. To connect to.

[0003]

Here, since the loads connected to the two voltage pole bars in the single-phase three-wire system are set to be equal, one of the voltage poles is arranged on one side of the pole bar. The number of circuit breakers connected to the pole bar and the number of circuit breakers arranged on the other side of the pole bar and connected to the other voltage pole bar are the same, but the actual load balance is It changes depending on the capacity of the connected load.

Accordingly, in practice, the load balance may not be maintained unless the number of circuit breakers connected to one voltage pole bar is different from the number of circuit breakers connected to the other voltage pole bar. On the other hand, conventional circuit breakers can only be connected to the neutral pole and the voltage pole that is closer to the circuit breaker. Was.

The present invention has been made in view of such a point, and an object of the present invention is to determine which of the two voltage pole bars is to be connected to the arrangement position with respect to the pole bars. It is another object of the present invention to provide a circuit breaker which does not have any problem, and another object is to provide a distribution board which can easily maintain a load balance in a single-phase three-wire system by using the circuit breaker.

[0006]

A circuit breaker according to the present invention is a circuit breaker connected to one of two voltage pole bars and a neutral pole bar in a single-phase three-wire system. ,
3 corresponding to the above three pole bars arranged in three rows before and after
One connecting portion is provided on the side end surface in the front-rear direction, and a neutral electrode terminal portion which is arranged in one of these connecting portions and is inserted and connected to the neutral pole bar, and another two connecting portions are provided. A terminal for a voltage pole which is arranged in one of the parts and is inserted and connected to one of the two voltage pole bars ;
Table showing the voltage pole bar to which the voltage pole terminal is further connected
It is characterized in that the indication is provided on the surface of the body . 2
The one connected to one of the voltage pole bars of the book can be arranged on both sides of the pole bar ,
Indication indicating the voltage pole bar to which the terminal for voltage pole is connected
Is provided on the body surface so that one voltage pole
Or connected to the other voltage pole bar
It is intended to be clear.

At this time, if the arrangement of the terminal portions on the connection portion is made freely selectable, a single type of circuit breaker can be connected to either of the voltage pole bars. further,
A first voltage pole terminal portion disposed on one of the other two connection portions and inserted and connected to one of the two voltage pole bars; and a remaining one connection portion. A second voltage pole terminal portion which is inserted and connected to another voltage pole bar, and switching means for switching the connection of the two terminal portions to the internal circuit may be provided. A single type of circuit breaker can be connected to either voltage pole bar. At this time, if the switching means is switched by a switch handle arranged on the surface of the body, it is possible to display which voltage pole bar is connected to the position of the switch handle.

[0008] In addition to indicating the name of the voltage pole bar, the display may be color-coded to correspond to the two voltage pole bars. In the case where the terminal portion corresponding to one of the voltage pole bars is located at the forefront connection portion, a window is provided on the surface of the body so that the connection portion can be visually recognized. The state of the connection portion visible through the display may be displayed.

When the terminal portion has a receiving blade connected to the pole bar, the terminal portion can be used. When the terminal portion is covered with a cover having a side wall provided with a cut groove through which the pole bar is inserted, A simple strip-shaped thing can be used as each pole bar. Further, the distribution board according to the present invention has two voltage pole bars and a neutral pole bar in a single-phase three-wire arranged in the front-rear direction in a housing, and the circuit connected to these pole bars is provided. It is characterized in that circuit breakers are arranged on both sides of the pole bar. Since there is no restriction that a circuit breaker connected to one of the voltage pole bars can be installed on only one side of the pole bar, load balancing in a single-phase three-wire can be easily achieved.

In the case of using a circuit breaker having a terminal portion having a receiving blade and a cover, the ends of the covers of the circuit breakers disposed on both sides of the pole bar are connected to the front side of the pole bar. In this case, exposure of the charged portion such as the pole bar can be prevented by the cover of the circuit breaker. And, in the case where the housing is provided with a lid for covering the circuit breaker, usually, a note about each circuit breaker is attached to the lid, but a terminal for a voltage pole is provided on the surface of the body of each circuit breaker. Since there is a display indicating the voltage pole bar to which the unit is connected, even when the lid is removed, the connected voltage pole bar can be known by the display.

In the case where the circuit breaker is provided with a display and a cover, a cover for covering the circuit breaker provided on the housing may be provided with a window through which the display and the cover of the circuit breaker can be seen. . The display provided on the circuit breaker side can be checked without opening the lid, and the presence of the window does not pose a problem because the cover prevents the charged portion from being exposed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described. FIG. 1 shows an embodiment of a circuit breaker 1 according to the present invention, and FIGS. 1 shows an example of a distribution board 7 including a container 1. The circuit breaker 1 according to the present embodiment includes a circuit breaker main body 10 and a cover 2 attached to one side end of the main body 10. One of the three circuit breakers 1 shown in FIG. 1 in which "L1" is written on the surface of the cover 2 has connection terminal plates 30, 31 in the cover 2. 2, the connection terminal plates 30 and 32 are provided in the cover 2 and “200” is further provided on the surface of the cover 2.
Are connected to the connection terminal plates 32, 33 in the cover 2.
Is arranged.

The above three circuit breakers 1 are composed of a main body 1 of the circuit breaker.
0 is the same, and the cover 2 is also of the same shape except that the symbol written on the surface is different, and as shown in FIG. The two terminals 11 and 12 are provided on the side end side to be used. As described above, the cover 2 has one end side divided into three front and rear rooms by the partition wall 20 and has a cut groove 25 on a side wall facing each room.

The two connection terminal plates 30 and 31 arranged in the cover 2 having the notation 40 of “L1” on the surface are:
As shown in FIG. 6 and FIG.
A connection terminal plate 31 having a receiving blade 35 in a front room of the three rooms of the cover 2.
Is connected to the terminal 12 of the breaker main body 10 by the connection fixing portion 36 at the other end.
The connection terminal plate 30 containing the receiving blade 35 in a middle room has the connection fixing portion 36 at the other end connected to the terminal 11 of the breaker main body 10.

As shown in FIGS. 8 and 9, the connection terminal plate 30 having the notation "L2" 40 on the surface of the cover 2 has the receiving blade 35 in the same manner as the connection terminal plate 30 in the above-described one. In the same room, and connect the connection fixing portion 36 to the terminal 11.
The connection terminal plate 32 accommodates the receiving blade 35 in a rear room of the three rooms, and connects the connection fixing portion 36 to the terminal 12.

Further, when the cover 2 has a notation 40 of "200" on the surface thereof, as shown in FIGS.
The receiving blade 35 of the connection terminal plate 32 is housed in the rear room, and the connection fixing portion 36 is connected to the terminal 12. The receiving blade 35 at one end of the connection terminal plate 33 is housed in the front room, and the connection fixing portion 36 is inserted. Connected to terminal 11. In addition, the connection fixing part 3
6 is fixed to the terminals 11 and 12 through the tool insertion holes 28 and 28 provided on the front side of the cover 2.
By closing the screw in.

The three circuit breakers 1 constructed as described above
As shown in FIG. 1, is connected to a single-phase three-wire power line which is spaced from the front in the order of a voltage pole bar L1, a neutral pole bar L0, and a voltage pole bar L2. However, if one half of each pole bar L1, L0, L2 is fitted into the cut groove 25 of each cover 2 from the side of these pole bars L1, L0, L2, the receiving blade 35 of the connection terminal plate 30 becomes neutral. The receiving blade 35 of the connection terminal plate 31 is attached to the pole bar L0.
1, the receiving blade 35 of the connection terminal plate 32 is connected to the voltage pole bar L2, and the receiving blade 35 of the connection terminal plate 33 is connected to the voltage pole bar L1.

That is, if the cover 2 has the notation "L1" 40 on its surface, the terminals 11 and 12 are connected to the neutral pole L0 and the voltage pole L1 via the connection terminal plates 30 and 31, respectively.
Are connected, and on the surface of the cover 2 there is a notation 40 of "L2", the connection terminal plates 30, 3
In the case where the neutral pole bar L0 and the voltage pole bar L2 are connected via the connection terminal 2 and the surface of the cover 2 has the notation 40 of "200", the terminals 11 and 12 are connected to the terminals 11 and 12 via the connection terminal plates 33 and 32, respectively. The pole bars L1, L2 are connected.

As shown in FIG. 5, each circuit breaker 1 can be connected to either of the right and left pole bars L1, L0, L2, and the circuit breaker body 10 is common. Depending on which of the connection terminal plates 31 and 32 are connected to the terminal 12 for use, the one connected to the voltage pole bar L1 and the neutral pole bar L0, the one connected to the voltage pole bar L2 and the neutral pole bar L0 And two types of circuit breakers 1 connected to the circuit breaker.

As apparent from the above connections,
Notation 4 of “L1”, “L2”, “200” on the surface of cover 2
0 indicates connection for the voltage pole bar L1, connection for the voltage pole bar L2, and 200V for connection to the voltage pole bars L1 and L2, respectively.
As described above, the cover 2 covering 0, 31, 32, and 33 differs from the cover only in the notation 40 of "L1,""L2," and "200," so that these notations 40 are formed with a seal. Thus, exactly the same can be used.

FIG. 2 to FIG. 4 show a distribution board 7 using the circuit breaker 1 as a branch breaker. A main breaker 5 is installed at the upper part of the main body, and two voltage pole bars L1, L2 and a neutral pole bar L0 whose upper ends are connected to the main breaker 5 are installed at an interval in the front-rear direction. As described above, the voltage pole bar L1, the neutral pole bar L0, and the voltage pole bar L
It is set to 2. The pole bars L1, L0, L2 arranged substantially at the center in the left-right direction in the housing 70.
On the other hand, each circuit breaker 1 is connected and fixed from the left and right directions. Reference numeral 67 in FIG. 4 denotes a mounting base for fixing the circuit breaker 1.

In the distribution board 7, the pole bars L1, L
Regulation that the circuit breaker 1 installed on one side of 0 and L2 is connected to one voltage pole bar L1 and the circuit breaker 1 installed on the other side is connected to the other voltage pole bar L2. , The cover 2 is provided with “L1” and “L” depending on the capacity of the load connected to each circuit breaker 1.
2 "may be selected. As a result, even if the number of circuit breakers 1 connected to voltage pole bar L1 is greater than the number of circuit breakers 1 connected to voltage pole bar L2. The circuit breaker 1 can be stored without any problem.

Accordingly, the circuit breaker 1 disposed on one side of the pole bars L1, L0, L2 is not always connected to the voltage pole bar L1, so that "L"
The notation 40 of "1" and "L2" indicates to which of the voltage pole bars L1 and L2 the circuit breaker 1 is connected. The window 76 provided on the inner cover 75 of the distribution board 7 and facing the handle 15 of the circuit breaker 1 also faces the notation 40 provided on the cover 2. The window 76 of the inner cover 75 in the illustrated example is a pole bar L
The front surface of the arrangement space of 1, L0, L2 is also large enough to open. The cover 2 of each circuit breaker 1
When the circuit breaker 1 is connected from the left and right of the pole bars L1, L0, L2, the side end surface of the cover 2 of the circuit breaker 1 on the left side,
In addition to the contact between the side end surface of the cover 2 of the circuit breaker 1 on the right side and the minute gap between the covers 2 of the circuit breakers 1 arranged vertically, the cover 2 The window 76 having the above size is problematic because it not only prevents the connection terminal plates 30, 31, 32, and 33 from being exposed, but also prevents the pole bars L1, L0, and L2 from being exposed. Instead, the notation provided on the surface of the cover 2 is made easier to see.
Reference numeral 77 in FIG. 3 denotes a pole bar L connected to the main breaker 5.
The numbers 1 to 24 attached to the concealing plate and the circuit breaker 1 for concealing the upper end portions of 1, L0 and L2 are branch circuit numbers.

The notation 40 provided on the surface of the cover 2 is as follows:
Since this is for specifying which of the voltage pole bars L1 and L2 is connected, a color-coded display may be used as shown in FIG. The circuit breaker 40 without the notation 40 in the figure is for 200V. Since one of the voltage pole bars L1 is disposed on the front surface, as shown in FIG. 13, a window 41 made of an opening or a transparent portion is provided on the front surface of the side end of the cover 2 so that the front room in the cover 2 is provided. Whether or not the connection terminal plate 31 is stored may be made visible through the window 41.

The circuit breaker body 10 and the cover 2 are separate bodies, and the connection terminal plates 30, 31, 32, 33 are detachably connected to the terminals 11, 12 of the circuit breaker body 1. The cover 2 may be integrated with the circuit breaker body 10, and the connection terminal plates 30, 3 having a receiving blade 35 at one end.
Two of the terminals 1, 32 and 33 may be fixed to the circuit breaker 1 to form the terminals 11 and 12. In this case, each circuit breaker 1 is for connection to the voltage pole bar L1 and for connection to the voltage pole bar L2 (further, for 200 V).
Becomes individual.

FIGS. 14 to 17 show other examples. In this circuit breaker 1, the cover 2 is formed integrally with the circuit breaker main body 10, and three types of connection terminal plates 30, 31, 32 each having a receiving blade 35 at the tip are built in. Further, of these connection terminal plates 30, 31, and 32, the connection terminal plate 30 for connection to the neutral pole bar L0 is directly connected to the cutoff circuit in the circuit breaker 1, whereas The connection terminal plate 31 for connection to the pole bar L1 and the connection terminal plate 32 for connection to the voltage pole bar L2 are formed by a switch handle provided on the surface of the circuit breaker 1 where the handle 15 is located. It is connected to a cutoff circuit through a changeover switch 6 which is switched by the operation of 60.

For this purpose, the circuit breaker 1 is connected to the pole bars L1,
When connected to L0, L2, although connected to all pole bars L1, L0, L2, the cutoff circuit is connected to voltage pole bars L1, L2 selected by the changeover switch 6. After installation on the distribution board 7, the connection to the voltage pole bar L1 or the connection to the voltage pole bar L2 can be changed.

When the connection terminal plate 31 is connected to the cutoff circuit by switching the changeover switch 6 by operating the switch handle 60, the notation 40 of "L1" appears on the surface in the illustrated example provided on the switch handle 60. When the connection terminal plate 31 is connected to the cutoff circuit, the notation “L2” 40 provided on the switch handle 60 appears on the surface, so that it is also specified which of the voltage pole bars L1, L2 is connected.

Another example is shown in FIGS. Here, connecting pieces 37 projecting left and right are fixed to three pole bars L1, L0, L2 arranged in front and rear, respectively. In the illustrated example, the two pole bars L0, L2 are shifted left and right but have the same position in the front-rear direction. However, they are fixed to these pole bars L1, L0, L2 in advance and then project left and right. In addition, since the connection pieces 37 having the same positions at both left and right ends are arranged in front and rear, three pole bars L1, L0, L2 are provided for each circuit breaker 1.
Are lined up and down.

The circuit breaker 1 shown in FIG. 20 having a notation 40 of “L1” on the surface thereof and a notation 4 of “L2”
The one shown in FIG. 21 where 0 is added to the surface is used. Of the two types of circuit breakers 1, for the "L1", the blade-shaped terminals 11, 12 are disposed in the front and middle terminal chambers of the three terminal chambers in the front-rear direction provided at the side ends. Then, "L
For "2", the receiving terminals 11 and 12 are arranged in the middle and rear terminal chambers of the three terminal chambers.

Also in this case, "L1" and "L
Each circuit breaker 1 for "2" can be installed on either the left or right of the pole bars L1, L0, L2. FIG. 22 shows a case in which the notation 40 in the above-described device is color-coded, and FIG.
A window 41 for checking whether or not 1, 12 are provided is shown.

[0032]

As described above, the circuit breaker according to the present invention is a circuit breaker connected to one of the two voltage pole bars and the neutral pole bar in a single-phase three-wire system. Three connecting portions respectively corresponding to the three pole bars arranged in three stages are provided on the side end surface in the front-rear direction, and are arranged in one of these connecting portions and inserted into the neutral pole bar. A neutral pole terminal portion to be connected, and a voltage pole terminal portion which is arranged in one of the other two connection portions and is inserted into and connected to one of the two voltage pole bars. Because it is equipped, the one connected to one of the two voltage pole bars can be arranged on both sides of the pole bar,
For this reason, which of the two voltage pole bars is to be connected to is not restricted by the arrangement position with respect to the pole bars, and there is little restriction on the attachment to the distribution board. In addition, the voltage pole bar to which the voltage pole terminal is connected
Display on the surface of the body
Connected to the pole bar or to the other voltage pole bar
Confirmation of the state of installation into the distribution board
Also, it becomes easy to set the load balance.

Further, when are freely select the placement of the terminal portion of the connection part, in order to be that a circuit breaker of a single species can be connected to either voltage electrode bars, the distribution board A single type of circuit breaker can be provided for the assembly.

Further, a first voltage pole terminal portion which is arranged in one of the other two connection portions and is inserted into and connected to one of the two voltage pole bars; A second voltage pole terminal portion disposed on the connection portion and inserted into another voltage pole bar and connected thereto, and a switching means for switching the connection of the two terminal portions to the internal circuit are also provided. A type of circuit breaker can be connected to either voltage pole bar. Further, the electrical connection can be switched while maintaining the physical connection.

In this apparatus, when the switching means is switched by a switch handle disposed on the surface of the body, it is possible to display which of the voltage pole bars is connected by the position of the switch handle. in order, it is easy to check the built-in state of the distribution board
You.

The above display may indicate the voltage pole bar names, or may be color-coded to correspond to the two voltage pole bars. The latter is more advantageous for checking the number of circuit breakers for setting the load balance. In the case where the arrangement position of the terminal portion corresponding to one of the voltage pole bars is the connection portion at the forefront, a window is provided on the surface of the body so that the connection portion can be visually recognized and can be seen through this window. The state of the connection unit may be displayed. Since only the window needs to be opened, it is not necessary to provide a different display according to the connected voltage pole bar.

When the terminal portion has a receiving blade connected to the pole bar, the terminal portion can be used. When the terminal portion is covered with a cover provided on the side wall with a cut groove through which the pole bar is inserted, A simple strip-shaped one can be used as each pole bar, and the charged portion can be prevented from being exposed. Further, the distribution board according to the present invention has two voltage pole bars and a neutral pole bar in a single-phase three-wire arranged in the front-rear direction in a housing, and the circuit connected to these pole bars is provided. Since the circuit breakers are arranged on both sides of the pole bar, there is no restriction that the circuit breaker connected to one voltage pole bar can be installed only on one side of the pole bar, so it is connected to the circuit breaker Even when the load capacities are different from each other, it is possible to easily balance the load in the single-phase three-wire system.

Further, in the case of using a circuit breaker having a terminal portion provided with the receiving blade and a cover, the ends of the covers of the circuit breakers arranged on both sides of the pole bar are brought forward of the pole bar. When the contact portions are in contact with each other, the exposed portion of the charged portion such as the pole bar can be prevented from being exposed by the cover of the circuit breaker, so that there is no need to separately provide a protection plate for concealing the charged portion.

In the case where the housing is provided with a cover for covering the circuit breaker, a note about each circuit breaker is usually attached to the cover, but a voltage is applied to the surface of the body of each circuit breaker. Provide a display indicating the voltage pole bar to which the pole terminal is connected
For this reason, even when the lid is removed, the connected voltage pole bar can be known by the display, which is convenient for maintenance or the like.

In the case where the circuit breaker is provided with a display and a cover, a cover for covering the circuit breaker provided in the housing is provided with a window through which the display and the cover of the circuit breaker can be seen. The display provided on the circuit breaker side can be checked without opening the lid, and the cover prevents the charged part from being exposed, so that the presence of the window does not matter. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of a circuit breaker according to the present invention.

FIG. 2 is a front view of an example of an embodiment of the distribution board according to the present invention with a door opened.

FIG. 3 is a front view of the distribution board with the door and inner lid removed.

FIG. 4 is a horizontal cross-sectional view of the distribution board.

FIG. 5 is a perspective view showing a connection state of the circuit breaker with the pole bar.

FIG. 6 is an exploded perspective view of the same circuit breaker.

FIG. 7 is a bottom view of the same circuit breaker.

FIG. 8 is an exploded perspective view of the same circuit breaker.

FIG. 9 is a bottom view of the same circuit breaker.

FIG. 10 is an exploded perspective view of the same circuit breaker.

FIG. 11 is a bottom view of the same circuit breaker.

FIG. 12 is a perspective view showing another example of the above.

FIG. 13 is a perspective view showing still another example of the above.

FIG. 14 is a perspective view showing another example of the circuit breaker of the above.

FIG. 15 is a perspective view of the same.

FIG. 16 is a bottom view of the above.

FIG. 17 is a bottom view of the above.

FIG. 18 is a perspective view of still another example of the circuit breaker of the above.

FIG. 19 is a horizontal sectional view of a distribution board provided with the above circuit breaker.

FIG. 20 is a sectional view of the circuit breaker according to the third embodiment;

FIG. 21 is a sectional view of the circuit breaker according to the third embodiment;

FIG. 22 is a perspective view of another example of the above.

FIG. 23 is a perspective view of still another example of the above.

[Explanation of symbols]

 L0 Neutral electrode bar L1 Voltage electrode bar L2 Voltage electrode bar 1 Circuit breaker 2 Cover 30 Neutral electrode connection terminal plate 31 Voltage electrode connection terminal plate 32 Voltage electrode connection terminal plate

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiya Nakamichi 1048 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. Inventor Toshihiro Ohido 1048 Kazuma Kadoma, Kadoma City, Osaka Pref. (72) Inventor Yasuhiro Sumino 1048 Kadoma Kadoma, Kadoma City, Osaka Pref. Examiner Shinichi Nakagawa, Matsushita Electric Works Co., Ltd., 1048 Kadoma, Ichidai-shi (56) Reference JP-A-7-245824 (JP, A) U) Actually open sho 56-166706 (JP, U) Really open sho 59-44106 (JP, U) Actually open sho 59-47203 (JP, U) Real open Hei 7-282709 (JP, U) Actual open Hei 7 −3273 04 (JP, U) Jingu 62-37366 (JP, Y1) Jinguhei 3-12001 (JP, Y2) US Patent 3,346,777 (US, A) SQUARE D COMPANY Catalog 1982, April 1982 SQUARE D COMPANY Catalog 1977, February 7, 1977 JIS C8371, Japan (58) Fields surveyed (Int. Cl. ⁷ , DB name) H01H 71/08 H02B 1/30 H02B 1/40

Claims (12)

(57) [Claims] 1. A circuit breaker connected to one of two voltage pole bars of a single-phase three-wire and a neutral pole bar, wherein the three pole bars are arranged in three stages before and after. A terminal portion for a neutral pole which is provided on one side end surface in the front-rear direction, and which is arranged in one of these connection portions and is inserted and connected to a neutral pole bar; And a voltage pole terminal portion which is arranged in one of the two connection portions and is inserted and connected to one of the two voltage pole bars , and further connected to the voltage pole terminal portion. Indicates voltage pole bar
A circuit breaker having a display on a body surface . 2. The arrangement of the terminal section on the connection section can be selected freely.
It is a circuit breaker of claim 1, wherein the are. 3. An arrangement in one of the other two connecting parts.
Plugged into one of the two voltage pole bars
The first voltage pole terminal part and the remaining one connection part.
Second voltage pole plugged into another voltage pole bar
Switch the connection of the terminal to the internal circuit.
And switching means for changing the position.
The described circuit breaker. 4. The switching means is a switch disposed on the surface of the body.
Characterized by being switchable with a handle
The circuit breaker according to claim 3 . 5. The display should show the name of the voltage pole bar.
The circuit breaker according to claim 1 , wherein: 6. The display is set corresponding to two voltage pole bars.
2. The circuit breaker according to claim 1 , wherein the circuit breakers are color-coded . 7. A terminal arrangement corresponding to one voltage pole bar.
The installation position is the first connection section and the
A window is provided on the surface to make the connection part visible.
The circuit breaker according to claim 1 , wherein: 8. The terminal portion has a pole bar at a receiving blade at its tip.
Each terminal part is inserted with a pole bar.
Featured by a cover with side walls
The circuit breaker according to any one of claims 1 to 7, characterized in that: 9. A two-phase pole bar and a middle pole in a single-phase three-wire system.
If the sex pole bars are arranged in the housing in the front-back direction
9. Both of claims 1 to 8 connected to these pole bars
Circuit breakers described in any of the above are arranged on both sides of the pole bar
A distribution board characterized by the following. 10. A two-phase pole bar in a single-phase three-wire system.
Neutral pole bars are arranged in the housing in the front-back direction
9. The circuit according to claim 8, which is connected to these pole bars.
Circuit breakers are installed on both sides of the pole bar,
Hold the ends of the circuit breaker covers together in front of the pole bar.
A distribution board characterized by being in contact with. 11. The housing has a cover for covering the circuit breaker.
The distribution board according to claim 9 or 10, wherein 12. The housing has a lid for covering the circuit breaker,
Let the lid look through the display and cover of the circuit breaker
The distribution board according to claim 10, wherein a window is provided .