JP3344059B2 - 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 that shuts off a circuit when an abnormal current including a leakage current flows and that opens and closes the circuit by remote control.

[0002]

2. Description of the Related Art Conventionally, as a circuit breaker of this type, two input terminals are provided at one end of a housing and two output terminals are provided at the other end, so that two terminals when manual operation or a remote signal is received are provided. Detects a remote control breaker block that opens and closes contacts when abnormal current flows, and an unbalanced current that flows through the contacts of the remote control breaker block, as well as opening and closing the contacts between the input and output terminals by driving the drive unit And a leakage detection block for accommodating a leakage detection unit for forcibly opening a contact portion of a remote control breaker block.

[0003]

In the above-mentioned conventional circuit breaker, an earth leakage breaker forcibly opening a contact portion when an abnormal current flows, including when the earth leakage detecting section detects an unbalanced current, It is not necessary to separately provide a remote control breaker that opens and closes a contact portion by driving a driving device that receives a remote signal.

However, in such a conventional device, two terminals are provided at both ends of the housing, and a remote control breaker block in which two driving devices are accommodated in the housing and a contact point of the remote control breaker block does not flow. Since it is a combination of side-by-side combination of a leakage detection block that contains a leakage detection unit that detects a balanced current, the size of the entire circuit breaker increases, and in the circuit breaker, a remote control breaker block and Since the wiring of the electric wire between the electric leakage detection block and the electric leakage detection block becomes very complicated, it cannot be said that the assembling workability is good.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object the purpose of forcibly opening a contact portion when an abnormal current such as electric leakage flows, and for opening and closing the contact portion by remote control. It is an object of the present invention to provide a circuit breaker which is small and has good workability in assembly.

[0006]

Means for Solving the Problems In order to solve the above-mentioned problems, according to the first aspect of the present invention, a housing, an operation handle rotatably supported by the housing, and one end of the housing are provided. Two input terminals, two output terminals provided at the other end of the housing, respective contact portions interposed between these input / output terminals, and a contact portion provided on one output terminal side of the housing and flowing to the contact portions. A leakage detection unit that detects an unbalanced current, a driving device that is provided on the other output terminal side of the housing and drives when receiving a remote signal,
Both contacts are opened and closed by manual operation of the operation handle provided on the input terminal side of the housing, and at least one of the contacts is opened and closed by driving of the driving device, and abnormal current including when the leakage detecting unit detects an unbalanced current is detected. And an opening / closing mechanism for forcibly opening both contact portions when flowing.

According to a second aspect of the present invention, there is provided an independent contact opening / closing section for opening and closing only one contact section by driving the driving device independently of the opening / closing mechanism section. It has a configuration.

[0008]

According to the first aspect, in a housing having two input terminals at one end and two output terminals at the other end, an opening / closing mechanism is provided on the input terminal side.
Unlike the conventional example in which two driving devices are provided, only one driving device is provided on the other output terminal side, so that one of the vacant spaces on the output terminal side is arranged in the remote control breaker block in the conventional example. Since the combined leakage detection unit is provided, the size of the entire housing does not need to be increased. In addition, since the contact portion between the input / output terminals and the leakage detection unit are adjacent to each other, the wire routed from the contact portion to the leakage detection unit does not need to be complicated.

According to the second aspect of the present invention, the drive device is driven by an independent contact opening / closing portion independent of an opening / closing mechanism having a large driving force for opening and closing.
Since only one of the contact portions is opened and closed, the driving force does not need to be increased to be strong.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. This circuit breaker consists of earth leakage breaker block A, remote control breaker block B,
Consists of C.

First, the earth leakage breaker block A will be described. Earth leakage breaker block A consists of body A1, cover A2, caulking pins AB3, AB3, AB3, AB3, input terminal A4, output terminal A5, switching mechanism A6, abnormal current detector A7, arc extinguishing device
It is composed of A8.

The body A1 is formed in a box shape having an opening on one side with an insulating material such as phenol resin, for example, and a cover A2 and a body B1 of a remote control breaker block B described later.
And the cover B2 to form the housing AB. Also,
The container A1 has an opening 100 for a handle, an opening 101 for a leakage display, an opening 102 for a test button on an upper wall surface, an input terminal mounting portion 103 on one side wall, and an output terminal mounting portion 104 on the other side wall. Formed so as to cut out from the opening end face, and an interlocking member on the back wall
C are provided with insertion holes 105 and 106 and a passage hole 107 for an electric wire 164 described later. Further, in the case A1, the portion provided with the insertion holes 105 and 106 is thinly cut out on the outer side of the inner wall surface, and the opening / closing mechanism interlocking member C1 of the interlocking member C is rotatably supported in the notch. A shaft (not shown) is provided. The upper and lower walls and the left and right side walls are not uniform thickness,
The inner wall side is appropriately designed in consideration of the arrangement, fixation, positioning and the like of the members to be housed, and the outer wall side is appropriately designed in consideration of the attachment and the like of the terminal member.

The housing A1 is divided into a first housing space 108 on the input terminal mounting portion 103 side and an output terminal mounting portion 10 by a partition wall.
It is partitioned into a second accommodation space 109 on the fourth side. The first accommodation space 108 includes an opening / closing mechanism unit A6, which will be described later, and an overcurrent detection unit A70.
, A short-circuit current detecting unit A71, an arc extinguishing device A8, and an insulating wall 110 that partitions the input terminal A4 and a bimetal 700 described later.
Then, an arc isolator 111 is disposed so as to close the gap between the arc extinguishing device A8 and a part of the opening / closing mechanism A6. More specifically, the arc isolator 111 is mounted by fitting a fitting protruding piece at the tip of the arc isolator 111 from a side surface of a gas discharge path 115 described later. Further, the housing A1 houses a leakage detection section A72 described later in the second accommodation space 109, and a leakage detection board 72 described later.
0 is provided, and a recess 113 is provided to mount a zero-phase current transformer 721 described later. Also, body A1
, An earth leakage display device 721 to be described later is disposed above the partition wall. Also, the body A1 has a cover A2
And the holes 114,114,114,114 for the swaging pins AB3, AB3, AB3, AB3 for fixing the remote control breaker block B,
A gas exhaust passage 115 is provided for communicating the storage space 108 with the outside.

The cover A2 is formed so as to close the opening of the container A1 with an insulating material such as phenol resin. The cover A2 is formed such that an opening portion 200 for leakage display and an opening portion 201 for a test button are cut out from an opening end surface, and holes 202, 202, 202, 202 for caulking pins AB3, AB3, AB3, AB3 are perforated. Then, each member is housed in the above-mentioned container A1,
Cover the cover A2 so as to cover the opening of the body A1, and caulk with the caulking pins AB3, AB3, AB3, AB3, and as described above, the body B1 of the remote control breaker block B and the cover.
A housing AB is formed together with B2.

The input terminal A4 includes a terminal screw 40, a terminal plate 41, and a nut 42. Specifically, the terminal screw 40 is provided with a driver's operation hole and a chevron contact. Terminal board
41 has a screw hole into which the terminal screw 40 is screwed, and a protruding piece connected to a coil 716 of the detection electromagnet A710 described later extends. The nut 42 has a screw hole into which the terminal screw 40 is screwed.

The output terminal A5 includes a terminal screw 50, a terminal plate 51, and a nut 52. Specifically, the terminal screw 50 is provided with a driver's operation hole and a chevron contact. Terminal board
51 is formed in an L-shape by one piece and the other piece, and one of the pieces is formed with a screw hole into which a terminal screw 50 is screwed, and the other piece is formed via a fixed contact 811 and an electric wire 84 described later. It is connected. The nut 52 has a screw hole into which the terminal screw 50 is screwed.

The opening / closing mechanism A6 includes a movable shaft 60, a movable contact 6
1. An opening spring 62, a connection link 63, a latch link 64, a trip link 65, a handle link 66, an operation handle 67, a frame 68, and a contact portion 69.

More specifically, the movable shaft 60 includes a first movable shaft 600,
It comprises a second movable shaft 601 and a third movable shaft 602.

The movable contact 61 is formed in a substantially U-shape by a pair of leg pieces and a connecting piece for connecting the leg pieces.
Further, the movable contact 61 is supported by the first fixed shaft 682 of the frame 68 by an elliptical shaft support hole of each leg piece, and a claw-shaped holding piece at the tip end of the leg piece has a first contact piece described later. The connecting link 63 is held by inserting the movable shaft 600. In addition, the movable contact 61
A movable contact 691 described later is provided at one end of the connecting piece, and further connected to the frame 68 by a copper stranded wire 610.

The opening spring 62 is formed in a coil shape. One end of the opening spring 62 is hooked on a connecting piece of the movable contact 61, and the other end is connected to a second yoke 71 described later.
7 to urge the movable contact 61 in the opening direction.

The connecting link 63 is formed in a substantially U-shape by a pair of leg pieces and a connecting piece for connecting one end of each of the leg pieces. The connecting link 63 is held by the holding piece of the movable contact 61 as described above by passing the first movable shaft 600 through the shaft hole at one end of each leg piece. The second movable shaft 601 is inserted through the shaft hole of the section and is connected to the latch link 64 and the handle link 66.

The latch link 64 is formed in a substantially U-shape by a pair of leg pieces and a connecting piece for connecting the leg pieces. The latch link 64 is provided with a circular shaft hole at one end of each leg, and the second fixed shaft 683 is inserted into the shaft hole to be pivotally supported. In the latch link 64, a slit-shaped holding hole is provided at the other end of each leg, and the second movable shaft 601 is inserted into the holding hole to connect the connecting link 63 and the handle link 66 as described above. Swivel to connect.

The trip link 65 is formed in a substantially L-shape by one large piece and the other small piece. Also,
One end of the trip link 65 is formed in a convex shape, and the tip of the convex portion is a bimetal 70 described later.
0, and a first part to be described later is attached to the side of the convex portion.
Of the transmission lever 728 is mounted, and the other end of one of the transmission levers 728 is interlocked with the movement of a movable iron core 714 described later. The trip link 65 is supported by inserting a third fixed shaft 684 into a C-shaped bearing hole at the base end of the other piece.
The other end locks the connecting piece of the latch link 64. The trip link 65 has a torsion coil spring 650 locked to the other piece. More specifically, the torsion coil spring 650 is engaged with the other end of the trip link 65 and the upper end of the first yoke 710 described later while being fitted and supported on the third fixed shaft 684 of the frame 68, and The other end of the link 65 is urged toward the connection side of the latch link 64.

The handle link 66 is formed in a substantially U-shape by a pair of leg pieces and a connecting piece for connecting the leg pieces. The handle link 66 connects the connecting link 63 as described above by inserting the second movable shaft 601 into the shaft hole at one end of each leg piece, and connects the third link to the shaft hole at the other end of each leg piece. The movable shaft 602 is inserted and connected to the operation handle 67.

The operation handle 67 is made of an insulating material such as a synthetic resin and has a base, a fan-shaped swinging part, and a protruding operation part. More specifically, the base is held by the latch link 64 by inserting the second fixed shaft 683 through a shaft hole at the center thereof, and one end of a spring 727 described later is supported near the shaft hole. The swinging portion connects the handle link 66 by inserting the third movable shaft 602 into a shaft hole at one end thereof, and swings the inside of the handle opening 100 around the base portion as a fulcrum. The operating section is provided with a shaft support hole for supporting the interlocking shaft 20 described later, and protrudes from the handle opening 100 on the upper wall surface of the body A1.

The frame 68 is composed of a frame body 680 and a frame cover 681.
Are connected to the frame cover 681 via the first to third fixed shafts 682, 683, 684. For details, see Frame body 680
Are formed in a substantially triangular shape having an opening near the center in a side view, and the first to third fixed shafts 68
One end of 2,683,684 is inserted, and the first
A yoke 710 is provided integrally. Frame cover
Like the frame body 680, the 681 is formed in a substantially triangular shape having an opening near the center in a side view, and the other end of each of the first to third fixed shafts 682, 683, 684 is inserted into each apex. Further, the frame cover 681 is provided with an extension piece from one end of one bottom side thereof, the tip of the extension piece is welded to the frame body 680, and a copper stranded wire is connected to the other end protruding from the one bottom side. 610 is welded.

The contact portion 69 includes a fixed contact 690 and a movable contact 69
1 and interposed between input / output terminals A4 and A5. More specifically, the fixed contact 690 is formed of a metal material that is difficult to weld, and is provided at the center of a fixed contact 811 described later. The movable contact 691 is, as described above, a movable contact.
It is provided at one end of the 61 connecting pieces.

In this embodiment, the opening / closing mechanism A6 is of a link type, but may be of a reversing type in which the contact portion 69 is rapidly reversed to one of an open position and a closed position.

The abnormal current detector A7 includes an overcurrent detector A70,
It comprises a short-circuit current detecting section A70 and a leakage detecting section A72.

The overcurrent detecting section A70 is made of a bimetal 700 formed by integrally integrating two thin plates having different thermal expansions. More specifically, the bimetal 700 is formed in a substantially L-shaped cross section by a vertical piece and a horizontal piece. The vertical piece is provided with a screw hole into which the gap adjusting screw 701 is screwed, and the horizontal piece has a frame cover 681 as described above.
Is arranged near the input terminal A4.

The short-circuit current detecting section A71 includes a detecting electromagnet A710.
A first yoke 710, a fixed iron core 711, a trip link drive rod 712, a return spring 713, and a movable iron core.
714, a coil cylinder 715, a coil 716, and a second yoke 717
It is composed of

More specifically, the first yoke 710 is formed in a substantially U-shaped cross section by both opposing pieces and a center piece, and one of the opposing pieces is integrally connected to the frame body 680 and fitted to the center piece. A hole is provided. The fixed iron core 711 is provided with a through-hole, and the leading end thereof is fitted into the fitting hole of the first yoke 710 from the inside and caulked and fixed. The trip link drive rod 712 is formed in a column shape longer than the fixed iron core 711,
It is inserted through the through hole of the fixed iron core 711 so as to be swingable. The return spring 713 is formed in a coil shape, is compression-suspended between the fixed iron core 711 and the movable iron core 714, and urges the movable iron core 714 toward the movable contact 61. The movable iron core 714 is a coil cylinder 715
A forced opening pole provided with a flange from one end protrudes from the small diameter portion of the coil cylinder 715 to the outside. The coil cylinder 715 is provided with a through hole and is formed by a large diameter portion and a small diameter portion, and the small diameter portion is fitted into the fitting hole of the second yoke 717 from the inside. The coil 716 is
Wound around the coil cylinder 715, one end of which is folded back and welded to the protruding piece of the input terminal A4, and the other end is made of copper stranded wire 71.
8 is welded at one end. Also, since the other end of the copper strand 718 is welded to the vertical piece of bimetal 700, the coil
716 will be connected to the bimetal 700. Second
The yoke 717 is formed in a substantially L-shaped cross section by one piece and the other piece.
The small-diameter portion is fitted, and the opening spring 62 is engaged with the concave portion at the tip of one of the pieces as described above.

The leakage detecting section A72 comprises a leakage detecting device A720 and a leakage displaying device A721. For details,
A720 includes a leakage detection board 720, a zero-phase current transformer 721, a control circuit unit 722, a movable contact plate 723, and a fixed contact shaft 724.
And a test button 725. The leakage display device A721 includes a leakage display member 726, a spring 727, first and second transmission levers 728 and 729, and a leakage detection unit electromagnet 73.
It is composed of 0.

Next, the leakage detecting device A720 will be described in more detail. The leakage detection board 720 has one end mounted in the notch 112 of the body A1 and disposed near the output terminal A5, and has a zero-phase current transformer 721, a control circuit section 722, and a movable contact plate 723. And the fixed contact shaft 724. At the other end of the leakage detection board 720, a notch is formed at a side end near the zero-phase current transformer 721, through which an electric wire 164 of a remote control breaker block B described later can pass. The leakage detection board 720 and the zero-phase current transformer 721 may be provided separately. Zero-phase current transformer 721
Is mounted in the recess 113 of the body A1 and detects an unbalanced current in the electric circuit, that is, the electric wires 84 and 164. Control circuit section 722
Amplifies the output when the zero-phase current transformer 721 detects an unbalanced current in the electric circuit, and an amplifier (not shown);
And a switching element (not shown). The amplifier outputs an output signal when the unbalanced current flowing through the electric circuit exceeds the sensitivity, and the switching element is configured by a thyristor that is turned on when the output signal of the amplifier is output. Note that the switching element may be constituted by a transistor.

The movable contact plate 723 holds the thick operation portion of the test button 725 so as to protrude from the body A1. The fixed contact shaft 724 generates an unbalanced current in the zero-phase current transformer 721 via a test circuit unit (not shown) described later. Test button 725
Is formed in a substantially columnar shape by a thick shaft operating portion and a thin shaft leg. The operation unit is attached to the test button opening 102 so as to protrude from the upper surface of the container A1. The leg is provided with a groove at the tip so as to have elasticity. When the test button 725 is mounted in the test button opening 102, the leg is locked inside the test button opening 102 and is movable. It is formed so as to contact the contact plate 723. When the test button 725 is pressed, the movable contact plate 723 comes into contact with the fixed contact shaft 724, and a zero-phase current transformer is passed through a current limiting resistor for limiting current and a test circuit formed by a test winding. 721 generates an unbalanced current.

Next, the leakage display device A721 will be described in more detail. The electric leakage display member 726 is composed of a columnar display section and a substantially prismatic leg. The display unit projects from the leakage display opening 101 when a leakage occurs. The leg is freely movable into and out of the leakage display opening 101, and a spring 727 is inserted into a cut groove at the center of the leg, and a protruding piece at the tip is locked to the first transmission lever 728. Spring727
Is formed in a coil shape, one end of which is supported by the base of the operation handle 67 while being inserted into the second fixed shaft 683,
The other end is inserted into the notch of the leakage indicating member 726, and is mounted so as to urge upward in FIG.

The first transmission lever 728 is formed in a substantially L-shape by one and the other pieces, and one piece of the trip link 65 is inserted and mounted in the opening of the one piece, and is attached to the other piece. The second transmission lever 729 is engaged, and the third fixed shaft 684 of the frame 68 is fitted in the concave portion between one and the other.
Is inserted and held by the frame cover 681 so as to be rotatable. The second transmission lever 729 is formed in a substantially L shape by oblique pieces and horizontal pieces. As described above, the oblique piece has its distal end engaged with the projecting piece of the leg of the leakage indicating member 726, its proximal end engaged with the other end of the first transmission lever 728, and the intermediate portion of the oblique piece. The first fixed shaft of the frame 68 in the recess
By inserting and mounting 682, the frame cover 68
It is held so that it can rotate to 1. The horizontal piece locks the tip of the shaft of the movable iron core 733 of the electromagnet 730 for the leakage detection unit.

In this embodiment, the output of the earth leakage detecting device A720 is transmitted to the opening / closing mechanism A6 by two transmission levers, that is, first and second transmission levers 728 and 729.
The transmission is similarly performed by a transmission lever constituted by one or three or more members.

The electromagnet 730 for the leakage detection unit is a coil bobbin.
731, a fixed iron core 732, a movable iron core 733, and a yoke 734.

The coil bobbin 731 includes a central portion and flange portions at both ends, and has a through hole extending from the flange portion at one end to the flange portion at the other end. The center part is a coil (not shown)
Is wound, and the flanges at both ends are fitted into the two opposing pieces of the yoke 734 in an uneven manner. In addition, the terminals at both ends of the coil bobbin 731 are connected to the control circuit unit 722 and the test circuit unit (not shown) of the leakage detection device A720 via lead wires (not shown). The fixed iron core 732 is formed in a substantially columnar shape provided with a cut groove, and is held in the concave portion of the yoke 734 while being inserted into the through hole of the coil bobbin 731. The movable iron core 733 is formed in a cylindrical shape by a thick main body and a thin shaft portion, and a tip end of the shaft portion is locked to a horizontal piece of the second transmission lever 729. Further, since the movable iron core 733 is held so that its main body is prevented from falling out of the concave portion of the yoke 734, it does not fall from the coil bobbin 731. The yoke 734 is formed in a substantially U shape by both opposing pieces and a center piece. Further, the yoke 734 is provided in the concave portions of the two opposing pieces.
The kerf of the fixed iron core 732 and the main body of the movable iron core 733 are held so as not to fall out of the through holes of the coil bobbin 731. As described above, the yoke 734 is mounted on the coil bobbin 731 with its concave portion fitted into the flange of the coil bobbin.

The arc extinguishing device A8 includes an arc traveling plate 81, an arc extinguishing grid 82, and an arc gas recirculation side plate 83. More specifically, the arc traveling plate 81 is formed in a substantially L shape by the arc traveling plate main body 810 and the fixed contact 811.

Next, the arc traveling plate 81 will be described in more detail. The arc traveling plate body 810 has a base end portion having a width smaller than that of a distal end portion, and is provided with elongated protrusion ribs from the base end portion to the distal end portion. In addition, the arc traveling plate body 810 causes the arc generated when the short circuit is interrupted to be far from the contact portion 69 composed of the fixed contact 690 and the movable contact 691, and the protruding ribs make the arc easy to travel and avoid sticking. It is supposed to be. The fixed contact 811
The output terminal is connected to the distal end via the electric wire 84 as described above.
The fixed contact 690 is provided at the center of the terminal A5 as described above.

The arc-extinguishing grid 82 is formed by laminating horseshoe-shaped plates, and is disposed so as to cover the tip of the arc traveling plate main body 810 to cut and cool the arc.

The arc gas recirculation side plates 83 are arranged so as to engage with the vicinity of the distal end of the fixed contact 811 with the base end of the arc traveling plate main body 810 sandwiched therebetween.

Next, the remote control breaker block B will be described. Remote control breaker block B
B1, cover B2, swage pins AB3, AB3, AB3, AB3, input terminals
B4, output terminal B5, switching mechanism section B6, abnormal current detection section B7, arc extinguishing device B8, electromagnet device (drive device) B9, independent contact switching section
Consists of B10.

The body B1 is formed substantially in the same manner as the body A1.
As described above, cover B2 and earth leakage breaker block A
A housing AB is formed together with the container A1 and the cover A2. Further, the body B1 has an opening 900 for a handle formed on the upper wall surface, and further has a display / operation hole 901 formed.
Further, the body B1 has a display and operation hole 901 on its inner wall surface.
, A shaft hole (not shown) for supporting the shafts 1820, 1820 of the holding frame 182 described later, and a shaft hole of the display lever 183 described later.
And a shaft (not shown) that supports the 1830.
Further, the body B1 has an input terminal mounting portion 902 on one side wall,
An output terminal mounting portion 903 is formed on the other side wall.
In addition, similarly to the case of the case A1, the case B1 has a first partition wall.
The storage space 904 and the second storage space 905 are partitioned. Further, the body B1 has an opening / closing mechanism section B6, an overcurrent detecting section B70, a short-circuit current detecting section B71,
The arc extinguishing device B8 is accommodated, an insulating wall 906 is provided, and an intermediate plate 907 is further provided. In addition, the container B2 has its second
The accommodation space 905 has an electromagnet device (drive device) B9 described later.
Is housed. Also, the body B1 has holes 908, 908, 908, 908 for swaging pins AB3, AB3, AB3, AB3,
A gas discharge passage 909 is provided.

The cover B2 is formed in the same manner as the cover A2, and is provided with insertion holes 1000 and 1001 of the interlocking member C so as to face the insertion holes 105 and 106 of the earth leakage breaker block A. The insertion hole of the earth leakage breaker block A is also provided. A passage hole 1002 for an electric wire 164 is provided so as to face 106. further,
A similar notch is provided at a position facing the notch provided outside the back wall of the earth leakage breaker block A, and an axis 1003 is provided opposite the axis of the notch of the earth leakage breaker block A. It is formed so as to close the opening of the container B1. The cover B2 is
A shaft hole (not shown) is provided at a position facing the shaft hole in the back wall of B2. The cover B2 has swaged pins AB3, AB3,
Holes 1004, 1004, 1004, 1004 for AB3, AB3 are drilled. Each member is accommodated in the above-mentioned body B1, and this cover B2 is covered so as to cover the opening of the body B1, and caulking pins AB3, AB3,
AB3, AB3, as described above, the housing AB together with the body A1 and cover A2 of the earth leakage breaker block A.
To form

The input terminal B4 comprises a terminal screw 120, a terminal plate 121, and a nut 122, like the input terminal A4.

The output terminal B5 comprises a terminal screw 130, a terminal plate 131, and a nut 132, like the output terminal A5.

The opening / closing mechanism B6 is basically the same as the opening / closing mechanism A6, and includes a movable shaft 140, a first movable contact 141, a first opening spring 142, a connecting link 143, a latch link 144, a trip link 145, Handle link 146, operation handle 147,
The frame 148 includes a contact 149.

More specifically, the movable shaft 140 is a first movable shaft 140
0, a second movable shaft 1401, and a third movable shaft 1402.

The first movable contact 141 is formed similarly to the movable contact 61. The first movable contact 141 is rotatably supported by a first fixed shaft 1482 of the frame 148, and a first movable shaft 1400, which will be described later, is inserted into a claw-shaped holding piece so that the connection link 14
Hold 3 Further, the first movable contact 141 is provided with a movable contact 1840 described later, and is further connected to the frame 148 by a copper stranded wire 1410.

The first opening spring 142 is formed similarly to the opening spring 62. The first opening spring 142 has one end hooked to a connecting piece of the first movable contact 141 and the other end hooked to a second yoke 1517 to be described later. Are biased in the opening direction.

The connecting link 143 is formed similarly to the connecting link 63. Further, the connection link 143 is inserted into the shaft hole at one end of each leg, and is held by the holding piece of the first movable contact 141 as described above. The second movable shaft 1401 is inserted into the shaft hole at the other end and connected to the latch link 144 and the handle link 146.

The latch link 144 is formed similarly to the latch link 64. The latch link 144 is supported by inserting a second fixed shaft 1483 into a shaft hole at one end of each leg piece. The latch link 144 penetrates the second movable shaft 1401 into the holding hole at the other end of each leg, and connects the connection link 143 and the handle link 146 in a swingable manner as described above.

The trip link 145 is connected to the trip link 65.
It is formed similarly. Also, trip link 145
The tip of one convex portion of the one piece is interlocked with the deformation of a bimetal 1500 described later, and an opening portion of a first transmission lever 1528 described later is attached to a side portion of the convex portion. The other end of the piece is interlocked with the movement of a movable iron core 1594 described later. The trip link 145 is supported by inserting a third fixed shaft 1484 into a bearing hole at the base end of the other piece, and the distal end of the other piece locks the connecting piece of the latch link 144. . The trip link 145 has a torsion coil spring 1450 locked to the other end. Specifically, the torsion coil spring 1450 is connected to the third fixed shaft 1484 of the frame 148.
In the state of being inserted and supported by the first link 145, the other link of the trip link 145 and the upper piece of the first yoke 1510, which will be described later, are locked, and the other link of the trip link 145 is urged toward the connecting link of the latch link 144.

The handle link 146 is connected to the handle link 66.
It is formed similarly. The handle link 146 is connected to the connection link 143 by inserting the second movable shaft 1401 into the shaft hole at one end of each leg as described above, and the third link is connected to the shaft hole at the other end of each leg. The movable shaft 1402 is inserted and connected to the operation handle 147.

The operation handle 147, like the operation handle 67, includes a base, a swing part, and an operation part. More specifically, the base portion is held by the latch link 144 by inserting the second fixed shaft 1483 into a shaft hole at the center thereof, and one end of a spring 1527 described later is supported near the shaft hole. The swing portion is provided with a handle link by inserting the third movable shaft 1402 into a shaft hole at one end thereof.
146, and the handle opening 900
Rocks inside. The operation unit is provided with a shaft support hole for supporting the interlocking shaft 20 described later, and protrudes from the handle opening 900 on the upper wall surface of the body B1.

The frame 148 is composed of a frame body 1480 and a frame cover 1481 similarly to the frame 68, and the frame body 1480 is connected to the first to third fixed shafts 1482, 1.
The frame cover 1481 is connected via 483, 1484.
More specifically, the frame main body 1480 has, similarly to the frame main body 680, first to third fixed shafts 1482, 1
One end of each of 483 and 1484 is inserted, and a first yoke 1510 described later is integrally provided at one bottom side. Frame cover 14
81 is formed in the same manner as the frame cover 681, and the other ends of the first to third fixed shafts 1482, 1483, 1484 are inserted into the respective vertices. Further, the frame cover 1481 is provided with an extension piece from one end of one bottom side thereof, the tip of the extension piece is welded to the frame main body 1480, and a copper stranded wire is connected to the other end protruding at the one bottom side. 1410 is welded.

The contact 149 is composed of a first movable contact 1490 and is interposed between the input / output terminals B4 and B5, and constitutes a pair of contact portions BB with a contact 184 of an independent contact opening / closing section B10 described later.
Specifically, as described above, the first movable contact 1490
The movable contact 141 is provided at one end of a connecting piece and faces a second movable contact 1840 described later.

In this embodiment, the opening / closing mechanism B6 is of a link type, but may be of an inversion type in which the contact portion BB is rapidly inverted to one of an open position and a closed position.

The abnormal current detecting section B7 includes an overcurrent detecting section B70,
It consists of a short-circuit current detector B70.

The overcurrent detecting section B70 is made of a bimetal 1500 in which two thin plates having different thermal expansions are integrally laminated, like the overcurrent detecting section A70. See Bimetal
1500 is formed in a substantially L-shaped cross section by a vertical piece and a horizontal piece. The vertical piece has a gap adjustment screw 15 at its tip.
A screw hole into which 01 is screwed is provided, and the horizontal piece is welded to the frame cover 1481, as described above,
It is arranged near the input terminal B4.

The short-circuit current detecting section B71 is provided with a short-circuit current detecting section A7.
As in the case of the first embodiment, a detection yoke 1510, a fixed iron core 1511, a trip link drive rod 1512
, A return spring 1513, a movable iron core 1514, and a coil cylinder 1515.
, A coil 1516, and a second yoke 1517. Specifically, the first yoke 1510 is formed in the same manner as the first yoke 710, one of the opposing pieces is integrally connected to the frame main body 1480, and a fitting hole is provided in the center piece. The fixed iron core 1511 is provided with a through hole similarly to the fixed iron core 711, and its tip is fitted into the fitting hole of the first yoke 1510 from the inside and caulked and fixed. The trip link drive rod 1512 is formed in the same manner as the trip link drive rod 712, and is swingably inserted into a through hole of the fixed iron core 1511. The return spring 1513 is formed in the same manner as the return spring 713, and is compression-suspended between the fixed iron core 1511 and the movable iron core 1514.
1514 is urged toward the first movable contact 141 side. Movable iron core
1514 is slidably fitted in the coil cylinder 1515 like the movable iron core 714, and a forced opening pole provided with a flange from one end thereof projects outside from the small diameter portion of the coil cylinder 1515. The coil cylinder 1515 is formed in the same manner as the coil cylinder 715, and the small diameter portion is fitted into the fitting hole of the second yoke 1517 from inside. Coil 1516 is the same as coil 716
It is wound around 1515, one end of which is folded back and the input terminal B4
One end of the copper stranded wire 1518 is welded to the other end. Also, since the other end of the copper stranded wire 1518 is welded to the vertical piece of the bimetal 1500, the coil 1516 is
It will be connected to Bimetal 1500. 2nd yoke 15
17 is formed in the same manner as the second yoke 717, the small-diameter portion of the coil cylinder 1515 is fitted in the fitting hole at the center of one of the one yoke, One open spring 142 is engaged.

The arc extinguishing device B8 comprises an arc traveling plate 161, an arc extinguishing grid 162, and an arc gas recirculation side plate 83.

More specifically, the arc traveling plate 161 is for making the arc generated at the time of short-circuit interruption far from the first movable contact 1490 and the second movable contact 1840. Is formed. Further, the arc traveling plate 161 supports the electric wire 164 at one end of one end thereof.

The arc-extinguishing grid 162 is formed in the same manner as the arc-extinguishing grid 82, and is arranged so as to cover the tip of the other piece of the arc traveling plate 161 to divide and cool the arc.

The arc gas recirculation side plates 163, 163 are substantially the same as the arc gas recirculation side plates 83, 83, with the base end of one of the arc traveling plates 161 sandwiched therebetween and in the vicinity of the distal end of the other one of the arc traveling plates 161. It is arranged to match.

The electromagnet device (driving device) B9 comprises a driving electromagnet B90, residual plates 1700, 1700, and a printed circuit board 1701.

More specifically, as shown in FIG. 3, the driving electromagnet B90 includes a coil frame 1702, a coil 1703 wound around the coil frame 1702, and a plunger 17 penetrating the coil frame 1702.
04 and inner yokes 1705, 1 arranged on both sides of the coil 1703
705, permanent magnets 1706, 1706 arranged outside the respective inner yokes 1705, outer yokes 1707, 1707 arranged outside the respective permanent magnets 1706, and inner yokes 1705 provided at both ends of the plunger 1704. Armatures 1708, 1708 located at both ends of the outer yoke 1707, and a connecting member 1709 provided at one end of the plunger 1704.
The second storage space 905 of the container B1 supported by the
Is housed in

The residual plates 1700, 1700 have openings, and are provided between the armature 1708 and the outer yoke 1707, respectively.

The printed board 1701 is provided with a changeover switch 1711 for the coil 1703 and operation terminals 1712, 1712. The printed circuit board 1701 is disposed below the driving electromagnet B90, connected to both ends of the coil 1703 by lead wires 1713, 1713, and operated via the changeover switch 1711 to the operation terminals 1712, 171.
Connected to 2.

In the vicinity of the driving electromagnet B90, there is provided an insulating guide 1714 for insulating the electric wire 164 from the driving electromagnet B90.

The independent contact opening / closing section B10 is provided with the second movable contact 18
0, the second opening spring 181, the holding frame 182, the display lever 183,
The contact is 184.

More specifically, the second movable contact 180 is formed in a substantially cross shape by a vertical piece and a horizontal piece. The second movable contact 180 is slidably held at one end of the holding frame 182 with a coil-shaped second opening spring 181 interposed at one end of the vertical piece. A second movable contact 1840 is provided at the end. Further, the second movable contact 180 has one end of the horizontal piece connected to the other end of the terminal plate of the output terminal B5 by the electric wire 164. Further, as described above, the electric wire 164 is passed through the cut of the leakage detection board 720 of the leakage breaker block A, and is insulated from the driving electromagnet B90 and the like by the insulating guide 1714.

The holding frame 182 is formed in a substantially L shape by one piece and the other piece. The holding frame 182 has shafts 1820, 1820 on both sides of the corners supported by shaft holes of the body B1 and the cover B2. The holding frame 182 has an electromagnet coupling shaft 1821 at one end thereof, and a shaft 18
22 are provided.

The display lever 183 is formed in a substantially T-shape by a plate-like display portion and a bar-like leg portion. The display lever 183 has a shaft hole 1830 at the center of the leg, which is pivotally supported by the axis of the back wall of the body B1, and an elongated shaft hole at the tip of the leg.
1831 is fitted to the shaft 1822 of the holding frame 182 and interlocks with the operation of the holding frame 182. The display portion of the display lever 183 can be seen through the display / operation hole 901 of the container B1. Further, by inserting a jig such as a screwdriver through the display / operation hole 901 and operating the display lever 183, the holding frame 182 can be rotated to open and close the second movable contact 180.

The contact 184 is a second movable contact 1840, and as described above, constitutes a pair of contact portions BB together with the contact 149 of the opening / closing mechanism B6. As described above, the contact 184 is provided at the other end of the vertical piece of the second movable contact 180 and is interposed between the input / output terminals B4 and B5.

Next, the interlocking member C will be described. The interlocking member C is an opening / closing mechanism interlocking member C1 and a handle interlocking member C2.
It has become.

More specifically, the opening / closing mechanism interlocking member C1 is formed in a plate shape having one surface and the other surface, and the first surface is provided on both surfaces.
Interlocking pieces C10, C10 and second interlocking pieces C11, C11 are provided, and an insertion hole C12 is further formed. In addition, the opening / closing mechanism interlocking member C1 has an insertion hole C12 formed in a cutout outside the back wall of the body A1 and the cover B2 so that the axis of the body A1 and the axis of the cover B2.
1003 is inserted in a rotatably supported state, and one of the first interlocking pieces C10 is inserted into the insertion hole 106 of the body A1.
The other first interlocking piece C1 is inserted into the insertion hole 105 of the body A1, and one of the second interlocking pieces C11 is inserted into the insertion hole 1000 of the body A1. Is inserted through the insertion hole 1001 of the cover B2. Thus, when the first interlocking member C10, C10 is pressed by the second movable shafts 601, 1401 of the earth leakage breaker block A and the remote control breaker block B, the opening / closing mechanism interlocking member C1 rotates. Due to the moving operation, the second interlocking pieces C11, C11 press the convex portions of one of the trip links 65, 145, respectively.

The handle interlocking member C2 includes an interlock shaft C20 and an interlock handle C21. The interlocking shaft C20 is connected to the body A1 and the body B1 by being axially supported by the shaft support holes of the operation portions of the operation handles 67 and 147 while being inserted through the insertion hole of the interlocking handle C21.

Next, an earth leakage breaker block of this type
The operation of the opening / closing mechanism A6 of A and the opening / closing mechanism B6 of the remote control breaker block B will be described below. The opening / closing mechanism A6 and the opening / closing mechanism B6 include an operation handle 67 and an operation handle 147.
When the interlock handle C21 of the handle interlocking member C2 is operated, the abnormal current detector A7 or the abnormal current detector B7
Operates when an abnormal current is detected and when power is supplied to the electromagnet device B9 of the remote control breaker block B.

More specifically, the detection of the abnormal current by the abnormal current detecting unit A7 is performed in the following three cases, namely, when the overcurrent detecting unit A7 detects
0 or when the overcurrent detection unit B70 detects an overcurrent, when the short-circuit current detection unit A71 or the short-circuit current detection unit B71 detects a short-circuit current, and when the short-circuit detection unit A72 of the short-circuit breaker block A detects a short-circuit. There are times.

First, the operation when the interlock handle C21 of the handle interlock member C2 is operated will be described. When the interlocking handle C21 of the handle interlocking member C2 is tilted toward the ON state, the operation handle 67 is tilted toward the ON state as shown in FIG.
When the second movable shaft 601 is locked with the latch link
As it moves from top to bottom in 64 holding holes, the second
The link 63 moves with the movable shaft 601. And
The connecting link 63 is connected to the third movable shaft 60 as it moves.
When 2 is displaced beyond a straight line connecting the second movable shaft 601 and the second fixed shaft 683, it rapidly reverses and moves. Then, the movable contact 61 connected to the connecting link 63 rotates about the first fixed shaft 682, and the movable contact 691 is fixed to the fixed contact.
Contact 690. At this time, the first fixed shaft 682 is located in the middle of the shaft support hole of the movable contact 61 and applies a contact pressure to the movable contact 691.

Further, the interlocking handle of the handle interlocking member C2
When C21 is tilted toward the ON state, the operation handle 147 is also tilted toward the ON state as shown in FIG. 8, and the latch link 144 is locked to the trip link 145, as shown in FIG. In this state, since the second movable shaft 1401 moves downward from above in the holding hole of the latch link 144, the connection link 143 moves together with the second movable shaft 1401. Then, similarly to the connection link 63, when the third movable shaft 1402 is displaced beyond the straight line connecting the second movable shaft 1401 and the second fixed shaft 1483 as it moves, the connection link 143 rapidly moves. Invert and move. Then, the link
The first movable contact 141 connected to the first fixed shaft 68
2, the first movable contact 1490 contacts the second movable contact 1840. At this time, like the first fixed shaft 682, the first fixed shaft 1482 is located in the middle of the shaft support hole of the first movable contact 141, and applies a contact pressure to the first movable contact 1490.

Next, the overcurrent detecting section A70 or the overcurrent detecting section
The operation when B70 detects an overcurrent will be described.

In the ON state, when an overcurrent flows through the electric circuit, at least one of the bimetal 700 of the earth leakage breaker block A and the bimetal 1500 of the remote control breaker block B self-heats. When the bimetal 700 generates heat, the gap adjusting screw 701 gradually biases the tip of the convex portion of the trip link 65. Then the trip link
The latch 65 is released from engagement with the connecting piece of the latch link 64 by being pressed. Then, the latch link 64 rotates,
The movable contact 61 has a fixed contact centering on the first fixed shaft 682.
Rotate away from 690. And the operation handle
67 forcibly opens the contact portion 69 and the second movable shaft 60
1 is hooked on the opening edge of the frame cover 681 and held at the neutral position.

Then, when the second movable shaft 601 presses the first interlocking piece C10 of the opening / closing mechanism interlocking member C1, the opening / closing mechanism interlocking member is pressed.
C1 starts to rotate, and in conjunction with the rotation,
The second interlocking pieces C11, C11 press the convex portions of one of the trip links 65, 145, respectively. Then, the trip link 145 is released from the engagement with the connecting piece of the latch link 144. Then, the latch link 144 rotates, and the first movable contact 141 moves to the second movable contact about the first fixed shaft 1482.
Rotate away from 1840. And the operation handle
147 forcibly opens the contact portion BB similarly to the operation handle 67, and the second movable shaft 601 is held at the neutral position by being hooked on the opening edge of the frame cover 1481. Therefore,
The interlocking handle C21 connected to the operation handles 67, 147 is also held at the neutral position.

Similarly, when the bimetal 1500 generates heat, the gap adjusting screw 1501 urges the tip of the convex portion of the trip link 145 gradually. Then, the trip link 145 is pressed and the latch link
The operation handle 147 forcibly opens the contact point BB, and opens and closes the first and second interlocking members of the opening / closing mechanism interlocking member C1 in the same manner as when the bimetal 700 self-heats due to the release of the engagement with the connecting piece of 144. Similarly, the operation handle 67 forcibly opens the contact portion 69 via C10 and C11.

Next, the operation when the short-circuit current detecting unit A70 or the short-circuit current detecting unit B70 detects a short-circuit current will be described. In the ON state, when a short-circuit current flows through the electric circuit and the movable iron core 714 of the detection electromagnet A710 is attracted to the fixed iron core 711, the trip link drive rod 712 is pushed out and the other end of one end of the trip link 65. Press the part. Then, the trip link 65 is rotated by being pressed, so that the latch link 64 is disengaged from the connection piece, and
As described above, the movable contact 61 is forcibly opened, and the contact portion 69 is forcibly opened.

Also, before the movable contact 61 is opened by the above-described interlocking operation, that is, at the same time as the operation of the movable iron core 714, the movable contact 61 is attracted by being locked to the flange of the movable iron core 714, thereby being movable. The contact 691 is separated from the fixed contact 690.
That is, just before the latch link 64 is displaced from the locked state, the movable contact 61 rotates about the first fixed shaft 682 as a fulcrum in the direction of compressing the opening spring 62 to perform the forcible opening operation.

As described above, as the latch link 64 is disengaged from the trip link 65 and is displaced, the second movable shaft 601 moves the opening / closing mechanism interlocking member C1 through the holding hole of the latch link 64. Move while pressing the first interlocking piece C10. Therefore, the opening and closing mechanism interlocking member C1 is
A70 turns in the same manner as when overcurrent is detected, and the second linking pieces C11, C11
Presses the convex portion of one of the trip links 65 and 145, the trip link 145
The first movable contact 141 is also forcibly opened, and the contact portion BB is forcibly opened.

In the ON state, a short-circuit current flows in the electric circuit, and the movable iron core 1514 of the detecting electromagnet B1510 is fixed to the fixed iron core.
When attracted by 1511, the trip link drive rod 1512 is pushed out and presses the other end of one end of the trip link 145. Then, the trip link 145 is rotated by being pressed, so that the latch link 144 is disengaged from the connecting piece, and the first movable contact 14
1 forcibly opens, and the contact section BB is forcibly opened.

Further, the first movable contact 141 is attracted by being locked to the flange of the movable iron core 1514 before the opening by the interlocking operation, that is, at the same time as the operation of the movable iron core 1514. The first movable contact 1490 is the second movable contact 1840
Separate from. That is, just before the latch link 144 is displaced from the locked state, the first movable contact 141 rotates about the first fixed shaft 1482 as a fulcrum in the direction of compressing the opening spring 142 to perform a forced opening operation. .

When the first movable contact 141 is opened, the first interlocking member of the opening / closing mechanism interlocking member C1 is moved in the same manner as when the movable iron core 714 of the detecting electromagnet A710 is attracted to the fixed iron core 711. The movable contact 61 is forcibly opened via C10 and C11, and the contact portion 69 is forcibly opened.

Next, the operation when the electric leakage detector A72 of the electric leakage breaker block A detects an electric leakage will be described. In the ON state, when leakage occurs, that is, when an unbalanced current flows, the leakage detection device A720 detects that the zero-phase current transformer 721 detects the unbalanced current and generates a secondary output. Amplifier amplifies and turns on switching element
State. Then, the coil of the leakage detection unit electromagnet 730 is excited, and the movable iron core 733 is fixed to the fixed iron core 732.
Side, the tip of the shaft of the movable iron core 733 pushes up the horizontal piece of the second transmission lever 729. Then, the second transmission lever 729 rotates around the first fixed shaft 682, and the base end of the oblique portion pushes down the other end of the first transmission lever 728. Then, since the first transmission lever 728 rotates about the third fixed shaft 684, the side of the convex portion of the trip link 65 having the opening thereof responds, and the trip link 65 is moved to the third position. Rotate around fixed axis 684. Then, the movable contact 691 is separated from the fixed contact 690 and the contact 69 is forcibly opened in the same manner as when the overcurrent detector A70 detects an overcurrent or when the short-circuit current detector A70 detects a short-circuit current. I do.

As described above, as the latch link 64 is disengaged from the trip link 65 and is displaced, the second movable shaft 601 moves the opening / closing mechanism interlocking member C1 into the holding hole of the latch link 64. Move while pressing the first interlocking piece C10. Therefore, the opening and closing mechanism interlocking member C1 is
A70 turns in the same manner as when overcurrent is detected, and the second linking pieces C11, C11
Presses the convex portion of one of the trip links 65 and 145, the trip link 145
The first movable contact 141 is also forcibly opened, and the contact portion BB is forcibly opened.

When the second transmission lever 729 rotates, the leakage indicator 726 releases the engagement between the projecting piece of its leg and the oblique piece of the second transmission lever 729, and the operation handle 67 and the second The display unit is urged by a spring 727 supported on the fixed shaft 683, and the display unit protrudes from the leakage display opening 101 of the container A2. At this time, the operation handle 67 is held at the neutral position.

When performing a leakage test, the test button 72
5 is pressed to bring the movable contact plate 723 into contact with the fixed contact shaft 724 to give a signal to the test circuit section. Then, the zero-phase current transformer 72
1, an unbalanced current is generated, and as described above, the movable iron core 733 of the electromagnet 730 for the earth leakage detection unit is attracted to the fixed iron core 732. Then, as described above, the movable contact 691 is separated from the fixed contact 690, and the contact portion 69 is forcibly opened.

Further, due to the electric leakage, the display portion of the electric leakage display member 726 protrudes from the electric leakage display opening 101 of the container A1, and when the operation handle 67 is at the neutral position, the operation handle 67 is displaced toward the opening position. Then, the other end of the swinging portion of the operation handle 67 comes into contact with the other end of the spring 727. Then, the other end of the spring 727 moves downward in FIG.
The leakage display member 726 into which the other end of the second transmission lever 727 is inserted moves toward the inside of the container A2, and the protruding piece of the leg is locked to the tip of the oblique piece of the second transmission lever 729.

In this embodiment, when the display portion of the leakage display member 726 projects from the leakage display opening 101 of the container A2 and the operation handle 67 is at the neutral position, the operation handle 67 is moved to the opening position. The projecting piece of the leg of the leakage indicating member 726 is locked to the tip of the oblique piece of the second transmission lever 729, but the operating handle 67 is displaced toward the closing position. Accordingly, a configuration in which the projecting piece of the leg of the leakage indicating member 726 is locked to the tip of the oblique piece of the second transmission lever 729 can be applied.

Next, the operation when power is supplied to the electromagnet device B9 of the remote control breaker block B, that is, when a remote signal is transmitted will be described. When power is supplied to the operation terminals 1712, 1712, the power is supplied to the coil 1703 via the changeover switch 1711, the plunger operates, and the stable position is maintained by the permanent magnets 1706, 1706. The connecting member 1709 is
When the plunger 1704 of the driving electromagnet B90 is driven, the holding frame 182 rotates about the shafts 1820, 1820, and the second movable contact 180 opens and closes. Operate.

The display lever 183 rotates in conjunction with the holding frame 182. More specifically, the display lever 183 rotates with its shaft hole 1830 supported by the shaft of the back wall of the container B2 and its shaft hole 1831 fitted to the shaft 1822 of the holding frame 182.

In such a circuit breaker, the opening and closing mechanisms A6, B6 are provided in the first accommodation spaces 108, 904 on the input terminals A4, B4 side.
And one of the output terminals A5 has a second housing space 109 on the side thereof.
Is provided with a leakage detecting section A72, and the driving device A9 is provided in the second housing space 905 on the other output terminal B5 side, so that the entire size of the housing AB does not need to be increased, so that the size can be reduced. .

Further, the driving device A9 is driven by
Opening / closing mechanism A6, B6 with large driving force to open and close
The independent contact opening / closing part A10, which is independent of the above, opens and closes only the contact part BB of the remote control breaker block B.Therefore, it is not necessary to increase the driving force so that the circuit breaker can be made smaller. it can.

Further, since the contact portions 69, BB and the leakage detection portion A72 between the input terminals A4, B4 and the output terminals A5, B5 are adjacent to each other, the wiring is routed from the contact portions 69, BB to the leakage detection portion A72. The wires 84 and 164 do not have to be complicated, and the workability of the assembly is improved.

In the present embodiment, the driving device A9 opens and closes only the contact portion BB of the remote control breaker block B by the independent contact opening / closing portion A10 by driving the driving device A9. 905
If it has a driving force capable of operating the opening / closing mechanisms A6 and B6, the independent contact opening / closing section A10 need not be provided.

[0108]

According to the first aspect of the present invention, in a housing having two input terminals at one end and two output terminals at the other end, an opening / closing mechanism is provided on the input terminal side, and the other output is provided. Since only one drive device is provided on the terminal side and the leakage detecting section is provided on the output terminal side, the size of the entire housing does not need to be increased, so that the circuit breaker can be downsized. In addition, since the contact portion between the input / output terminals and the leakage detecting portion are adjacent to each other, the wire routed from the contact portion to the leakage detecting portion does not need to be complicated, and the workability of assembly is improved.

According to a second aspect of the present invention, the driving device opens and closes only one contact portion by an independent contact opening / closing portion independent of an opening / closing mechanism portion having a large driving force for opening / closing by driving the driving device. Therefore, it is not necessary to increase the driving force so as to be strong, so that the size of the circuit breaker can be further reduced as compared with the first embodiment.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of the present invention.

FIG. 2 is an exploded perspective view of the earth leakage breaker block.

FIG. 3 is an exploded perspective view of the remote control breaker block according to the first embodiment.

FIG. 4 is a partially exploded perspective view of the earth leakage breaker block according to the first embodiment;

FIG. 5 is a partially exploded perspective view of the same remote control breaker block.

FIG. 6 is a perspective view of an earth leakage breaker block and a remote control breaker block according to the embodiment.

FIG. 7 is a cross-sectional view showing a state in which the contact portion is closed by operating the handle in the above earth leakage breaker block.

FIG. 8 In the remote control breaker block according to the above,
It is sectional drawing which shows the state which the contact part closed by handle operation.

FIG. 9 is a cross-sectional view showing a state in which the contact portion is opened by operating the handle in the above earth leakage breaker block.

FIG. 10 is a cross-sectional view showing a state in which a contact portion is opened by operating a handle in the remote control breaker block of the above.

FIG. 11 is a cross-sectional view showing a state in which an abnormal current flows and the electrode is forcibly opened in the above earth leakage breaker block.

FIG. 12 is a cross-sectional view showing a state in which an abnormal current flows and a forcible opening is performed in the remote control breaker block according to the embodiment.

FIG. 13 is a sectional view showing a state in which one contact portion is opened by an independent contact opening / closing portion in the remote control breaker block of the above.

[Explanation of symbols]

 AB housing A4, B4 Input terminal A5, B5 Output terminal A6, B6 Opening / closing mechanism A72 Leakage detector A9 Drive (electromagnetic device) A10 Independent contact opening / closing 67, 147 Operation handle 69, BB contact

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-111928 (JP, A) JP-A-3-266329 (JP, A) JP-A-61-230231 (JP, A) JP-A-4- 163823 (JP, A) Japanese Utility Model Showa 63-33545 (JP, U) Japanese Patent Publication No. Sho 45-1692 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01H 83/02 H01H 71 / 66

Claims (2)

(57) [Claims] 1. A housing, an operation handle rotatably supported by the housing, two input terminals provided at one end of the housing, and two output terminals provided at the other end of the housing. Each contact portion interposed between these input / output terminals, a leakage detection portion provided on one output terminal side of the housing to detect an unbalanced current flowing through the contact portion, and provided on the other output terminal side of the housing. A drive device that is driven upon receiving a remote signal, and both contact portions that are provided on the input terminal side of the housing and that are opened and closed by manual operation of an operation handle and that at least one of the contact portions is opened and closed by the drive of the drive device, and the leakage detection unit is not A circuit breaker comprising: a switching mechanism for forcibly opening both contact portions when an abnormal current flows, including when a balanced current is detected. 2. The circuit breaker according to claim 1, further comprising an independent contact opening / closing section that opens and closes only one contact section by driving the driving device independently of the opening / closing mechanism section.