JPH1050193A - Earth leakage breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earth leakage breaker where the cover of each lead wire for a circuit breaker bolck is hardly broken, and interpole short-circuiting hardly takes place. SOLUTION: This earth leakage breaker is provided with unit bodies 1 and 2 which house respectively the circuit breaker block of one pole provided with a fixed contact 9 and a movable contact, that are connected with an output terminal 6 by way of lead wires 7 and 8, and with an unit body 3 housing a leakage detection block taking in the lead wires 7 and 8 of the aforesaid circuit breaker block, and the bottom plane 2a of a central unit body 2 is cut off until a part of the fixed contact is exposed so as to allow the lead wires to be taken in the unit body 3. In this case, a partitioning bulkhead 17 is provided for the unit body 2, which divides a part of the fixed contact 9 and a lead wire 8 from the another unit body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker block in which a circuit breaker block for detecting an excessive current and forcibly opening a movable contact and a leakage detection block for detecting an unbalanced current are housed in separate bodies. About the vessel.

[0002]

2. Description of the Related Art An earth leakage breaker of this type is shown in FIG. In FIG. 6, the leftmost body 1 and the center body 2 have fixed contacts 9 connected to the output terminals 6 and 6 via the lead wires 8 and 7, and can freely contact and separate from the fixed contacts 9. A movable contact (not shown) opposing the movable contact is driven to open and close so as to be able to freely contact and separate from the fixed contact 9, and the movable contact is forcibly opened from the fixed contact 9 when an excessive current flows. A single pole circuit breaker block is accommodated.
In addition, the rightmost housing 3 in FIG. 6 houses a leakage detection block that detects the unbalanced current in the electric circuit by drawing in the leads 7 and 8 of the circuit breaker block.

[0003] Opposite sides of the side surfaces of the respective bodies 1, 2, 3 are cut out so as to lead the lead wires 7, 8 of each circuit breaker block into the body 3 containing the earth leakage detection block. Also, the bottom surface 2a of the central body 2 and the bottom surface of the rightmost body 3
3a is also cut out so that the lead wires 7, 8 can be easily drawn in. The central body 2 is notched until a part of the fixed contact 9 housed in the body 2 to which the lead wire 7 is connected is exposed. Then, a cover 16 is attached to the bottom surface 2a of the central body 2 and the bottom surface 3a of the right body 3 so as to close the notch formed in each bottom surface.

[0004]

In the earth leakage breaker described above, the bottom of the central body in FIG. 6 is cut off until a part of the fixed contact is exposed, and the central body in FIG. Since the lead wire is routed between the notch on the bottom of the right body and the notch on the bottom of the right body, the lead wire of the left body in FIG. There was a case where the clothing of the garment was torn, which could cause a short circuit between poles.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an earth leakage circuit breaker in which the coating of the lead wire of the circuit breaker block is less likely to be broken, and hence a short circuit between poles is less likely to occur. To provide.

[0006]

According to a first aspect of the present invention, there is provided an earth leakage circuit breaker having a fixed contact connected to at least one of input / output terminals via a lead wire. A movable contact that opposes and separates from the fixed contact, drives the movable contact to open and close freely to and from the fixed contact, and forcibly opens the movable contact from the fixed contact when an excessive current flows 1 The circuit breaker block of the pole, and a leakage detection block for detecting the unbalanced current of the electric circuit by drawing in the lead wire of the circuit breaker block, wherein the circuit breaker block and the leakage detection block are respectively provided in separate bodies. The housing containing the circuit breaker block
At the same time, the housing containing the ground fault detection block is arranged on the outermost side, and the bottom of the other side of the body is cut off until a part of the fixed contact is exposed, and In the earth leakage breaker in which the side facing the body is cut out and the lead wire of each circuit breaker block is drawn into the body containing the leakage detection block, the body with the bottom cut out is attached to the body. A partition wall is provided to partition a part of the fixed contact and a lead wire from another body.

[0007] The earth leakage breaker according to a second aspect is configured such that the partition wall of the first aspect is formed so as to protrude to a position where it comes into contact with the cover in a state where a cover for covering the cut-out bottom surface is attached.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. That is, as shown in FIG. 2, this earth leakage breaker has two bodies 1, 2 each containing a one-pole circuit breaker block, and these bodies
A housing is formed from a body 3 that is arranged side by side on the outermost sides of the first and second housings and houses the leakage detection block, and a protective cover 4 attached to the upper surface side of the three bodies 1, 2 and 3. I have.

As shown in FIG. 3, the circuit breaker block includes input / output terminals 5, 6 provided on both sides in the longitudinal direction of the body 2.
, A fixed contact 9 connected to the output terminal 6 via a lead wire 7, a movable contact 10 opposing the fixed contact 9 so as to be able to come and go, and an electric contact between the movable contact 10 and the input terminal 5. The opening / closing and tripping mechanism 11 for opening and closing the movable contact 10 so that it can be freely connected to and detached from the fixed contact 9 in a state where the movable contact 10 is electrically connected, and forcibly opening the movable contact 10 from the fixed contact 9 when an excessive current flows. And Reference numeral 12 denotes a remote control electromagnet that drives the movable contact 10 to and away from the fixed contact 9 by a remote control signal. The configuration of the circuit breaker block housed in the housing 1 is the same as that of FIG.
Description is omitted.

[0010] As shown in FIG.
It operates by the zero-phase current transformer 13 that detects the unbalanced current by drawing the leads 7 and 8 of the circuit breaker block from the notch formed in the bottom surface 3a of the housing 3 and the output of the zero-phase current transformer 13 It has a tripping electromagnet 14 and the like, and displays a leakage when a leakage current flows, and forcibly opens the movable contact 10 of the circuit breaker block described above.

Next, the main part of the present invention will be described with reference to FIGS. That is, the main part of the present invention is a structure in which the lead wires 8 and 7 from the bodies 1 and 2 containing the circuit breaker block are drawn into the body 3 containing the earth leakage detection block, as shown in FIG. Cut off the opposing sides of each of the bodies 1,2,3, and remove the center body 2 (containing the one-pole circuit breaker block) and the right body 3 (containing the leakage detection block). The bottom surfaces 2a and 3a are notched, and the lead wires 7 and 8 of each circuit breaker block are routed to the earth leakage detection block and inserted into the zero-phase current transformer 13.

The notch on the bottom surface 2a of the central body 2 is a lead wire.
It is formed until a part of the fixed contact 9 connected to 7 is exposed, so that the lead wire 7 can be easily connected to the fixed contact 9. A stepped portion 1 is formed around the notch of the bottom surface 2a of the central body 2 and the notch of the bottom surface 3a of the right body 3.
5, 15 are formed so that the cover 16 can be attached with an adhesive.

The central body 2 has fixed contacts
A partition wall 17 is formed to separate a part of the body 9 from the lead wire 8 from the other body 1, and a part of the fixed contact 9 disposed in the center body 2 to form the other body 1 The lead wire 8 from the other body 1 does not touch, and the lead wire 8 from the other
There is no danger of contact with the fixed contact 9 arranged in the body 2 with the notch cut out, and no short circuit between the poles occurs. As shown in FIG. 5, the dividing wall 17 has notched bottom surfaces 2a and 3a.
Cover 16 with cover 16 attached to steps 15,15
It is formed to protrude to the position where it abuts on the cover 16, so that the cover 16 is not easily displaced even when a force pressing the cover 16 is applied,
The cover 16 is less likely to break.

According to the present embodiment, the output terminal of each circuit breaker block is electrically connected to the fixed contact via the lead wire, but the input terminal of each circuit breaker block is connected to the lead. It may be electrically connected to the fixed contact via a wire. In addition, three housings accommodating the one-pole circuit breaker block may be arranged in parallel to form a three-pole earth leakage breaker. In this case, if the bottom surfaces of two bodies other than the two outermost bodies are cut, connection of the lead wire to the fixed contact housed in the two cut bodies becomes easy.

[0015]

According to the first aspect of the present invention, there is provided a fixed contact connected to at least one of the input / output terminals via a lead wire, and a movable contact opposed to the fixed contact so as to be capable of coming and going. A one-pole circuit breaker block for driving the movable contact to open and close freely to and from the fixed contact, and forcibly opening the movable contact from the fixed contact when an excessive current flows; A leakage detection block for detecting an unbalanced current in an electric circuit by drawing in a lead wire of the circuit breaker block, the circuit breaker block and the leakage detection block are housed in separate bodies, and the circuit breaker block is housed. Two or more containers are arranged side by side, and the container housing the leakage detection block is arranged on the outermost side, and the bottom of the other side of the container is cut out until a part of the fixed contact is exposed. With you In earth leakage circuit breaker formed by drawn by notch the sides facing the device body of people leads of each circuit breaker block device body accommodating a leakage detection block,
Since the bottom body is provided with a partition wall for separating a part of the fixed contact of the body body and a lead wire from another body body, the bottom body is provided in the body body having the bottom body notched. The lead wire from another body may not contact with a part of the fixed contact, and the lead wire from the other body may be broken and come into contact with the fixed contact arranged on the body whose bottom is cut off. And no short circuit between the poles occurs.

According to the earth leakage breaker of the present invention, the partition wall is formed to protrude to a position where it comes into contact with the cover in a state where the cover for covering the cut-out bottom surface is attached, so that a force for pressing the cover is provided. Even if it is added, the cover will not easily shift,
In addition to the effect of the first aspect, the cover is less likely to break.

[Brief description of the drawings]

FIG. 1 is a rear perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing the front side of the device shown in FIG.

FIG. 3 is an explanatory view showing a circuit breaker block of FIG. 2;

FIG. 4 is an explanatory diagram showing a leakage detection block of FIG. 2;

FIG. 5 is a side view showing a main part of the invention shown in FIG. 1;

FIG. 6 is a rear perspective view showing a conventional example.

[Explanation of symbols]

 1,2,3 Body 2a, 3a Bottom 5 Input terminal 6 Output terminal 7,8 Lead wire 9 Fixed contact 10 Movable contact 16 Cover 17 Partition wall

Claims (2)

[Claims] A fixed contact connected to at least one of the input / output terminals via a lead wire; and a movable contact opposing the fixed contact so that the movable contact can be freely separated from the fixed contact. The movable contact is forcibly opened from the fixed contact when an excessive current flows, while the opening and closing drive is performed so that the contact can be freely separated.
The circuit breaker block of the pole, and a leakage detection block for detecting the unbalanced current of the electric circuit by drawing in the lead wire of the circuit breaker block, wherein the circuit breaker block and the leakage detection block are respectively provided in separate bodies. Two or more housings containing the circuit breaker block are housed side by side, and the housings containing the earth leakage detection blocks are housed side by side on the outermost side, and the bottoms of the housings arranged side by side other than the outermost are fixed. In a circuit breaker, the contact is cut out until a part of the contact is exposed, and the side facing each body is cut out, and the lead wire of each circuit breaker block is drawn into the body containing the leakage detection block. An earth leakage breaker, wherein a cut-off wall for separating a part of a fixed contact of the body and a lead wire from another body is provided in the body having the bottom cut away. 2. The earth leakage breaker according to claim 1, wherein the partition wall is formed so as to protrude to a position where the partition wall comes into contact with the cover in a state where a cover for covering the notched bottom surface is attached.