JP3405264B2 - Circuit breaker - 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 having a leakage detection mechanism built therein.

[0002]

2. Description of the Related Art FIG. 6 shows a structure of a distribution board 41 using a conventional circuit breaker, in which one main breaker 42 and a large number of branch breakers 43 are arranged. Branch breaker 43
Voltage-side terminals 44 and 45 are provided on both sides of one side, one terminal 44 is connected to the voltage-side bars 46 and 46 through a contact bar 48, and the other terminal 45 is connected to a load 49. Further, a neutral wire neutral bar 47 is provided from the main breaker 42, is led out from the neutral terminal 50 to the load 49, and the voltage side wire and the neutral wire are supplied on the load 49 side. ing.

[0003]

In the case of such a conventional example,
Send only the power line to the load 49 via the branch breaker 43,
The neutral wire was sent to the load 49 via the neutral bar 47 and the neutral terminal 50. This is because it is not easy to connect the power supply line and the neutral line to the branch breaker 43. Further, since the neutral wires are individually routed from each neutral terminal 50 to the load side, there is a problem that the wiring becomes complicated.

The present invention has been made in view of the above points, and provides a circuit breaker for facilitating connection of a neutral wire to a neutral bar.

[0005]

In order to achieve the above object, according to the invention of claim 1, an operating portion of a handle for opening and closing a contact is arranged on one surface of a substantially rectangular parallelepiped main body, and a voltage is applied to both sides of the main body. Side terminals and neutral wire side terminal portions are respectively arranged, and voltage side contacts interposed between voltage side terminal portions arranged on both sides of the main body, and neutral wire side terminals arranged on both sides of the main body, respectively. The neutral line side contact interposed between the parts is arranged inside the main body side by side in the height direction of the main body, and the opening / closing direction of the voltage side contact and the neutral line side contact is set.
Since the voltage direction terminal and the neutral line side terminal for connecting the voltage line and the neutral line respectively are provided on both sides of the main body, they are provided on one side of the main body. Connect the voltage line and neutral line on the power supply side to the voltage side terminal and neutral line side terminal, and load side voltage to the voltage side terminal and neutral line side terminal provided on the other side of the main unit. Wires and neutrals can be connected, and voltage and neutrals connected to the load can be pulled out from one place, so you can organize the wiring neatly without having to run around the voltage or neutrals. In addition, since the voltage side contact and the neutral line side contact are arranged side by side in the height direction of the main body inside the main body, even if the size in the width direction of the main body is reduced, the size of both contacts can be reduced. Can be made sufficiently large, and the contact life of both contacts can be extended.

According to a second aspect of the invention, in the first aspect of the invention, the voltage side terminal portion and the neutral wire side terminal portion, which are arranged on both sides of the body, are arranged side by side in the height direction of the body. And, even if the size of the main body in the width direction is reduced, since both terminal portions are arranged side by side in the height direction of the main body,
The size of both terminal portions can be made sufficiently large, and the allowable value of the current flowing through both terminal portions can be increased.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The circuit breaker of this embodiment will be described with reference to the drawings. In FIG. 1 and FIG. 3, terminal portions 2 and 3 on the voltage side are arranged in the middle portions on both sides of the main body 1,
A blocking mechanism is provided inside. That is, body 4
A movable contact plate 5 screwed to the spring 6 is arranged so as to be biased by a spring 6, and a movable contact 7 is fixed to the tip. A fixed contact 8 facing the movable contact 7 is fixed on a terminal plate 9 of the terminal portion 2.

An opening 10 is formed below the terminal portion 2 below the body 4, and the terminal board 1 is formed in the opening 10.
1 is provided. A fixed contact 12 is provided on one end side of the terminal plate 11, and a U-shaped connecting piece 13 is provided on the other end side. The upper piece of the connecting piece 13 is a contact piece 13a having elasticity.
, And is in elastic contact with the neutral bar 14 of the neutral line.

That is, the neutral bar 14 is inserted into each of the openings 10 of the main body 1 arranged side by side, and is fitted in the connecting piece 13 in a plug-in manner, and the contact piece 13a is elastically contacted with the upper surface of the neutral bar 14. , Getting electrical contact.

A movable contact plate 16 to which a movable contact 15 facing the fixed contact 12 is fixed is urged by a spring 17 and is moved to a body 4
It is screwed to. Further, a neutral wire terminal portion 18 is arranged below the voltage side terminal portion 3, and the terminal portion 18
The movable contact plate 16 and the movable contact plate 16 are connected by a lead wire 20 inserted into a zero-phase current transformer 19. As described above, inside the main body 1, the contact interposed between the terminal portions 2 and 3 on the voltage side and the contact interposed between the terminal plate 11 and the terminal portion 18 on the neutral wire side are located at the height of the main body. They are arranged side by side in the direction (that is, the vertical direction in FIG. 1).

Further, the upper end portion of the bimetal 21 which is fastened together with the movable contact plate 5 and the terminal portion 3 are connected by a lead wire 22 inserted through the zero-phase current transformer 19. Handle 2
3 is a latch plate 24 and a link 26 integrated with the interlocking plate 25.
And the upper and lower holes 2 formed in the interlocking plate 25.
The movable contact plate 5 is inserted through 5a, and the interlocking plate 2
The movable contact plate 16 is brought into contact with the lower surface of the contact plate 5, and the contact is interlocked with the vertical movement of the interlocking plate 25 by the operation of the handle 23 to open and close.

Further, as shown in FIG. 1 (b), the tip of the latch plate 24 is engaged with the engaging recess 27a of the latch engaging plate 27 whose base is rotatable, so that the overcurrent and the electric leakage are prevented. In this case, the engagement is released by the rotation of the latch engagement plate 27, and the trip operation for opening the contact is performed.

A printed circuit board 28 on which electronic components are mounted is arranged on the inner side surface of the body 4, and the zero-phase current transformer 19 and the solenoid 29 for driving the latch engagement plate 27 are mounted. I am doing it. If a leak is detected,
The output on the secondary side of the zero-phase current transformer 19 is amplified and drives the solenoid 29 to drive the latch engagement plate 27 to cause the trip operation described above.

On the upper surface of the main body 1, the operating portion 2 of the handle 23 is provided.
An opening 4a through which 3a is projected is perforated, and a display element (light emitting diode) 30 for displaying a display at the time of leakage detection, a test button 31 for testing the leakage detection mechanism, and a trip mechanism are provided on the side of the opening 4a. Is provided.

By the way, a large number of circuit breakers according to the present embodiment are arranged on the distribution board, and an inner lid 32 is provided on the front side of the circuit breaker in addition to the outer door. Further, these circuit breakers are used as safety breakers for homes, and are formed in the size of the distribution board agreement size. Then, an opening hole 33 for exposing the front portion of the circuit breaker is formed in the inner lid 32, and the operating portion 23a of the handle 23 of the circuit breaker, the display element 30, and the test button 31 are exposed from this opening hole, By opening the outer door of the distribution board, you can operate the handle and display the leakage without opening the inner lid 32.
I am able to test.

FIG. 1 shows an on state, and FIG. 2 shows an off state. In addition, in FIG. 1, a contact bar 35 of a bar 34 disposed above the neutral bar 14 is connected to the terminal portion 2. Further, a pair of power supplies on the voltage side and the neutral line side is supplied to the load from the other terminal portions 3 and 18 of the main body 1.

By the way, in the above embodiment, the opening 10 is formed.
Although the terminal plate 11 is provided inside, as shown in FIGS. 4 and 5, the terminal plate 11 is not provided inside the opening 10, and the neutral bar 14 is inserted all the way into the opening 10 of the main body 1, The movable contact 12 for the neutral wire may be brought into direct contact with the upper surface of the neutral bar 14 to open and close. Since the other configurations are the same as those of the circuit breaker described above, the description thereof will be omitted.

[0018]

As described above, according to the first aspect of the present invention, the operating portion of the handle for opening and closing the contacts is arranged on one surface of the substantially rectangular parallelepiped main body, and the voltage side terminal portion and the neutral wire are provided on both sides of the main body. The side terminals are respectively arranged, and the voltage side contacts interposed between the voltage side terminals arranged on both sides of the main body and the neutral side terminals interposed between the neutral side terminals arranged on both sides of the main body, respectively. Line side contacts are arranged inside the main unit side by side in the height direction of the main unit , and voltage side contacts and neutral
It is characterized in that the opening and closing direction with the wire side contact is the same direction, and since the voltage side terminal portion and the neutral wire side terminal portion for connecting the voltage wire and the neutral wire respectively are provided on both sides of the main body,
The power supply side voltage line and the neutral line are connected to the voltage side terminal part and the neutral line side terminal part provided on one side of the main body, and the voltage side terminal part and the neutral line provided on the other side of the main body The voltage line and neutral line on the load side can be connected to the side terminals, and the voltage line and neutral line connected to the load can be pulled out from one place, so route the voltage line and neutral line. Since the wiring can be neatly organized and the voltage side contacts and neutral line side contacts are arranged side by side in the height direction of the main body, the size in the width direction of the main body has been reduced. Even in this case, there is an effect that the size of both contacts can be made sufficiently large and the contact life of both contacts can be extended.

According to a second aspect of the invention, in the first aspect of the invention, the voltage side terminal portion and the neutral wire side terminal portion, which are arranged on both sides of the main body, are arranged side by side in the height direction of the main body. Even if the size of the main body in the width direction is reduced, since both terminals are arranged side by side in the height direction of the main body, it is possible to make the size of both terminals large enough. There is an effect that the allowable value of the flowing current can be increased.

[Brief description of drawings]

1A and 1B are a cross-sectional view and a main-portion cross-sectional view of a circuit breaker of the present embodiment when the circuit breaker is on.

2A and 2B are a cross-sectional view and a cross-sectional view of a main part when the same is off.

FIG. 3 is a plan view of the above circuit breaker.

4A and 4B are a cross-sectional view and a main-part cross-sectional view of another circuit breaker of the above when the circuit breaker is turned on.

5 (a) and 5 (b) are a cross-sectional view and a main-portion cross-sectional view when the same is off.

FIG. 6 is a configuration diagram of a conventional distribution board.

[Explanation of symbols]

1 body 2,3,18 Terminal part 7,15 movable contact 8, 12 fixed contacts 11 terminal board 14 Neutral bar 23 handle 23a Operation unit

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01H 71/00-83/22

Claims (2)

(57) [Claims] 1. An operating portion of a handle for opening and closing a contact is disposed on one surface of a substantially rectangular parallelepiped main body, and a voltage side terminal portion and a neutral wire side terminal portion are disposed on both sides of the main body, and both sides of the main body are disposed. The voltage side contacts interposed between the voltage side terminal parts respectively arranged and the neutral line side contacts interposed between the neutral line side terminal parts respectively arranged on both sides of the main body are provided inside the main body. Are arranged side by side in the vertical direction, and the opening / closing direction of the voltage side contact and the neutral line side contact is set.
Circuit breaker characterized by having the same direction . 2. The circuit breaker according to claim 1, wherein the voltage side terminal portion and the neutral wire side terminal portion, which are respectively disposed on both sides of the main body, are arranged side by side in the height direction of the main body.