JPH0652784A - Earth leakage breaker - Google Patents

Abstract

PURPOSE:To easily judge which earth circuit breaker an operation handle, a leakage display member and a test button belong to by arranging the operation handle, the leakage display member, and the test button on the handle protruding part of a housing in order in the direction of input and output terminals. CONSTITUTION:On the handle protruding part 11 of a housing, an operation handle 52 consisting of an oscillating part having a sector form seen from side and an operation part 82 held through a second fixed shaft together with a latch link; a leakage display member 114 protruded to the upper surface of the housing at the time of leakage; and a test button 27 consisting of nearly a cylindrical operation part and a leg part extending from the lower surface of the operation part are arranged in order in the direction of input and output terminals 8, 9. These can be separated from the operation handle, leakage display member and test button of the adjacent earth leakage breaker, and when earth leakage breakers are juxtaposed, it is easily judged which earth leakage breaker the operation handle, the leakage display member and the test button belong to.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth leakage circuit breaker, and more particularly to an earth leakage circuit breaker in which mounting positions of an operation handle, an earth leakage display member and a test button are improved.

[0002]

2. Description of the Related Art As an earth leakage breaker of this type, Japanese Patent Publication No. 62-
There is one shown in Japanese Patent No. 35213. This product has an operation handle and a test button on both sides of the handle's protrusion centering on the leakage indicator, and the zero-phase current transformer detects the unbalanced current in the electrical path to indicate the leakage indicator. It is possible to confirm the trip operation of the cutoff mechanism by giving a signal for supplying an unbalanced current to the zero-phase current transformer by pressing the test button while performing the operation. When this earth leakage breaker is installed in a distribution board, it is installed by arranging it side by side in a direction intersecting the opening / closing direction of the operation handle.

[0003]

When the above-mentioned earth leakage breaker is incorporated into a distribution board, since the operation handle and the test button are arranged on both sides of the earth leakage display member as a center,
There is a problem that the operation handle and the test button are easily mistaken for the adjacent earth leakage breaker.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an earth leakage breaker in which it is easy to understand which earth leakage breaker the operation handle, the earth leakage display member and the test button belong to. It is in.

[0005]

An earth leakage circuit breaker according to claim 1 accommodates a power supply side wire of an electric circuit having a contact inserted therein and a grounding side wire arranged in parallel with the power supply side wire, and both ends of at least the power supply side wire are input / output. The housing is equipped with terminals and has a handle protrusion that is inserted into the window hole of the inner lid of the distribution board on the top surface, and the operation handle that opens and closes the contact protruding from the handle protrusion flows between the contact and the contact. Has a bimetal that detects overcurrent,
A breaking mechanism that forcibly opens the contacts in response to this bimetal, a zero-phase current transformer that detects the unbalanced current in the electric circuit, and a leakage detection device that has a control circuit unit that processes the detection signal, and a zero-phase transformer. A test button provided on the upper surface of the housing for giving a signal for flowing an unbalanced current to the current transformer, and an earth leakage display member provided on the upper surface of the housing for displaying an earth leakage in response to the output of the earth leakage detection device. In the provided earth leakage circuit breaker, the operation handle, the earth leakage display member, and the test button are sequentially arranged on the handle protrusion of the housing in the input / output terminal direction.

According to a second aspect of the present invention, in the earth leakage breaker, the bimetal of the interruption mechanism of the first aspect is arranged near one side of the input / output terminal and the control circuit section of the earth leakage detection device is arranged near the other side of the input / output terminal. There is a configuration.

[0007]

According to the structure described in claim 1, since the operation handle, the earth leakage display member, and the test button are sequentially arranged in the handle protrusion of the housing in the direction of the input / output terminals, the operation handle of the adjacent earth leakage breaker, It can be separated from the leakage display member and the test button.

According to a second aspect of the present invention, in the first aspect, the bimetal of the breaking mechanism is arranged near one side of the input / output terminal, and the control circuit section of the leakage detecting device is arranged near the other side of the input / output terminal. In addition to the previous action,
The heat generated by the bimetal is difficult to transfer to the control circuit section.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 to 4 in FIG. 1, FIGS. 11 to 16 in FIG. 10, and FIGS.
FIG. 17, FIG. 26 to FIG. 28 should be put together in FIG. 25, FIG. 30 to FIG. 32 should be put in FIG. 29, and FIG. 35 to FIG. 37 should be put in FIG. 34. I decided to show it.

That is, the housing 1 of this earth leakage breaker
Is made of insulating material such as synthetic resin,
6 and the grounding side wire 7 of the electric line installed in parallel with this. The input terminal 8 of the power supply side wire 6 of the electric line is provided at one end of the housing 1, and the output terminal 9 of the power supply side wire 6 of the electric line is provided at the lower end of the other end.
Equipped with the output terminal 10 of the ground side wire 7 of the electric path on the upper stage of the other end,
A rectangular handle protrusion 11 that is inserted into a window hole 230 formed in an inner lid 228 of a distribution board 225, which will be described later, at the center of the outside of the upper surface.
In addition to the above, a neutral handle window hole 12 having a rectangular shape for operating a neutral handle 214 described later, which is sandwiched between an outer wall 13 and an inner wall 40 described later, is provided on one side outside the upper surface. On the handle protrusion 11,
In FIG. 1, a rectangular operation handle window hole 14 to which an operation handle 52 to be described later is mounted is provided on the left side, and two operation holes 15 having a large diameter upper portion and a lower diameter through hole at the center and right sides. , 16 and are provided, and this handle protrusion 11
The operation portion 82 of the operation handle 52 is projected from the. Further, at both ends, mounting recesses 17 and 18 for mounting on a distribution board 225 described later are provided, and through holes 19 and 20 through which a neutral electric wire 216 described later is inserted are provided. Note that the neutral electric wire 216 may project from the through hole 19 on the input terminal 8 side of the power supply side wire 6. Also, the ground side line of the electric circuit
It is also possible to omit the output terminal 10 of 7 and connect it directly to the load.

This housing 1 has a body 2 having openings on the side surface and in which parts are laterally fitted, an arc separator 3 for separating an arc, a terminal separator 4, and an opening of the body 2 is closed. Consists of cover 5, body 2, terminal separator 4 and cover
It is integrally fixed to the caulking hole 21 formed in 5 by four caulking tacks 22.

The inside of the body 2 has a first section 23A in which a shut-off mechanism 24 for shutting off an electric path by a partition wall 23 and an arc extinguishing device 25 for shutting off and cooling the arc are arranged in a substantially central portion and a leakage current. It is divided into a second section 23B in which a leak detecting device 26 for detecting and a test button 27 are arranged. In the first section 23A, a concave terminal groove 29 for mounting the input terminal 8 of the power supply side wire 6,
An exhaust port 30 for exhausting gas generated in the arc extinguishing device 25 is formed below the terminal groove 29. Further, an insulating plate 31 for partitioning the input terminal 8 of the power supply side line 6 and a bimetal 93 described later is arranged on the inner side of the terminal groove 29.

In the second section 23B, the output terminal of the power supply side wire 6
A recessed terminal groove 32 for mounting 9 is provided, and a support portion 33 on which a neutral device 212 described later is mounted is provided on the upper back side of the terminal groove 32. The support portion 33 includes a stationary side contact portion 208 of a terminal plate 202, which will be described later, by a neutral movable plate 213, which will be described later.
A contact surface 33a to be a place to contact with, and an urging spring 215 to be described later, which is provided at one end of the contact surface 33a.
Is provided with a mounting recess 33b. This support
Inside the body 2 above 33, there is a neutral handle.
It has an inclined contact portion 34 with which the neutral movable plate 213 comes into contact when opening 214, and is provided at one end of this contact portion 34, and is a positioning protrusion 223 of a biasing spring 215, which will be described later. Has an insertion recess 34a into which is inserted. Further, in the second section 23B, a cut groove 35 in which an earth leakage detection substrate 133 described later is mounted and a recess 36 in which a zero-phase current transformer 129 described later is mounted are formed inside the upper surface. ing. Further, a hook shaft 37 for hooking a tension spring 148, which will be described later, is formed on the side surface of the partition wall 23.
Further, above the partition wall 23, a leakage display device 28 for displaying the leakage state is arranged.

The arc separator 3 is a neutral electric wire 216.
And a fitting projection piece 39 that separates the exhaust port 30 and the through hole 19 from each other.
By fitting 39 from the side of the exhaust port 30, the first section 23
A body to block the arc extinguishing device 25 of A and a part of the interruption mechanism 24.
Attached to 2.

The terminal separator 4 is connected to the output terminal 10 of the ground side wire 7.
Is provided with inner walls 40 and 41 for separating the neutral device 212 and the leakage detecting device 26, and has a concave terminal groove 42 for mounting the output terminal 10 of the ground side wire 7 which is isolated by the inner walls 40 and 41, It is attached so as to form a step with the terminal groove 32 of the second section 23B. A through hole 43 communicating with the contact surface 33a of the support portion 33 is provided on the inner wall 40 side of the terminal groove 42.

The cover 5 closes the opening of the body 2, and is provided in the body 2 with the opening of the body 2 closed. The shutoff mechanism 24, the arc extinguishing device 25, and the earth leakage detection device 26. , Test button 2
7. Holds the leakage display device 28 and the like.

The shut-off mechanism 24 is composed of an opening / closing mechanism section 44 for manually opening and closing the electric path, and an abnormal current detecting device 45 for opening the electric path when an abnormal current flows. The opening / closing mechanism unit 44 is
A movable contactor 46 having an intermediate portion axially supported by a first fixed shaft 54 of a frame 53, which will be described later, an opening spring 47 for urging the movable contactor 46 in the opening direction, and a first movable movement of the movable contactor 46. The connecting link 48, one end of which is connected via a shaft 57, and the second link of the frame 53.
A latch link 49 pivotally supported by the fixed shaft 55 together with the operation handle 52 and having a slit 71 for swingably supporting the second movable shaft 58 held at the other end of the connecting link 48, and a frame.
A trip link 50 pivotally supported by the third fixed shaft 56 of 53 to latch the latch link 49, one end of the trip link 50 connected to the connecting link 48 via the second movable shaft 58, and the other end of the trip link 50 via the third movable shaft 59. The handle link 51 connected to the operation handle 52, the operation handle 52 held together with the latch link 49 on the second fixed shaft 55 of the frame 53, and the first to third fixed shafts 54, 55 for holding these members. Frame 53 with 56 and power side lines
It consists of 6 input / output terminals 8 and 9 and a contact 60 interposed between them.

The movable contactor 46 has an elliptical slit 61a so that the middle portion thereof is supported by the first fixed shaft 54 of the frame 53.
A movable contact 63 that is formed in a substantially U-shape from a pair of leg pieces 61 that are parallel to each other and a connecting piece 62 that connects the leg pieces 61, and that is connected to and separated from a fixed contact 92 described later at one end of the connecting piece 62. And a projection 64 for hooking one end of the opening spring 47 at the other end of the connecting piece 62. Further, a daruma hole (not shown) for inserting a movable iron core 102 described later to forcibly open the movable contact 46 in the opening direction is formed substantially in the center of the connecting piece 62. Further, a claw-shaped holding piece 65 to which the connecting link 48 is connected via the first movable shaft 57 is provided at the tip extending obliquely upward from the middle portion of the leg piece 61. The movable contactor 46 is connected to the frame 53 via a copper stranded wire 66.

The opening spring 47 is formed in a coil shape, one end of which is hooked on the projection 63 of the movable contact 46 and the other end of which is hooked on a hooking portion 117 of the second yoke 105, which will be described later. Child
46 is biased in the opening direction.

The connecting link 48 is composed of a pair of parallel leg pieces 67 having shaft holes at both ends, and a connecting piece 68 for connecting the leg pieces 67 from the vicinity of the shaft hole at one end of the leg pieces 67, A holding piece for the movable contactor 46 through the first movable shaft 57 in the shaft hole at one end.
65 and also to the latch link 49 and the handle link 51 via the second movable shaft 58 in the shaft hole at the other end.

The latch link 49 has a shaft hole axially supported by the second fixed shaft 55 and a slit 71 for swingably supporting the second movable shaft 58, so that the latch link 49 has a generally V-shaped side view. It is composed of a pair of leg pieces 69 that are formed and are parallel to each other, and a connecting piece 70 that connects the leg pieces 69 to each other from substantially the center of the leg pieces 69. That is, the connecting link 48 and the handle link 51 are swingably held in the slit 71 via the second movable shaft 58.

The trip link 50 is composed of a standing piece 72 and a side piece 73 integrally connected to each other at an intermediate portion of the standing piece 72. An ear piece 74 is formed on the side opposite to the side piece 73. It is pivotally supported by the third fixed shaft 56 via a bearing hole formed in the ear piece 74. At the end of the side piece 73 of the trip link 50, the latch link 49
An engaging portion 75 for engaging the connecting piece 70 is formed. Further, the frame 53 is fitted and supported by the third fixed shaft 56, and is engaged with the side piece 73 and the upper piece 106 of the first yoke 98 described later,
A torsion coil spring 76 for urging the side piece 73 toward the connecting piece 70 side of the latch link 49 is provided. At the upper end of the standing piece 72, a bimetal interlocking plate 77 that interlocks with the deformation of the bimetal 93, and an opening 159 of a first transmission lever 146, which is provided in a direction intersecting the bimetal interlocking plate 77, are mounted. Protrusion 78
And a movable iron core 10 to be described later is provided at the lower end of the standing piece 72.
A movable iron core interlocking plate 79 is provided for interlocking the movements of the two.

The handle link 51 is composed of a pair of parallel leg pieces 80 having axial holes at both ends and a connecting piece 81 for connecting the leg pieces from the center of the leg piece 80. It is connected to the connecting link 48 via the second movable shaft 58, and is connected to the operation handle 52 via the third movable shaft 59 in the shaft hole at the other end.

The operating handle 52 is made of an insulating material such as synthetic resin and swings the operating portion 82 projected from the handle protrusion 11 on the upper surface of the housing 1 and the window hole 14 of the housing 1. A shaft hole 85, which is held through the second fixed shaft 55 together with the swinging portion 83 having a fan shape in side view and the latch link 49, and a spring shaft hole 86 into which one end 154 of a spring 145, which will be described later, is inserted. And a base portion 84 that serves as the center of rotation. In addition, the third movable shaft is provided at one end of the swing portion 83.
A protrusion 87 having an axial hole to which the handle link 51 is connected via 59 is provided.

The frame 53 includes a frame main body 88 integrally formed with the first yoke 98 and a first main body 88 formed on the frame main body 88.
To a frame cover 89 connected through the third fixed shafts 54, 55, 56. The frame main body 88 is formed into a substantially triangular shape with an opening inside when viewed from the side, and the first to third fixed shafts 5 are respectively formed at the apex and the two bottom sides.
It has a shaft hole into which 4, 55 and 56 are inserted, and the first on the two bottom sides.
The yoke 98 is integrally provided. Frame cover 89
Like the frame main body 88, is formed in a substantially triangular shape with an opening inside when viewed from the side, and the first to third fixed shafts 54, 55, and 56 are inserted at both ends of the apex and the bottom, respectively. It has a shaft hole. Further, from one end of the bottom side, a leg piece 90 extending downward and a side piece 91 extending from the tip of the leg piece 90 toward the frame main body 88 are connected. This frame cover
Frame cover 89 by welding one of copper strands 66 to 89 and the other of copper strands 66 to movable contact 46.
And the movable contact 46 are connected.

The contact 60 is composed of a movable contact 63 provided on the movable contact 46 and a fixed contact 92 provided on a fixed contact 122, which will be described later, and is provided between the input / output terminals 8 and 9 of the power supply side wire 6. Intervenes. The movable contact 63 is provided at one end of the connecting piece 62 of the movable contact 46 as described above. Fixed contact 92
Is provided in the vicinity of the base end of the protrusion 127 of the fixed contact 122 described later. The movable contact 63 and the fixed contact 92 are both made of a material that is difficult to weld. According to the present embodiment, the opening / closing mechanism is of the link type, but it may be of the reversing type in which the contacts are rapidly inverted to either the open pole or the closed pole.

The abnormal current detector 45 is composed of a bimetal 93 for detecting an overcurrent and a detection electromagnet 94 for detecting a short circuit current. The bimetal 93 is made by superimposing two thin plates having different thermal expansion coefficients into one piece, and has a vertical piece 95 and a horizontal piece.
From 96, the whole is bent and formed in a substantially L-shape, and heat is generated and deformed in accordance with a current flowing. A screw hole 95a into which the gap adjusting screw 97 is screwed is provided at the upper end of the vertical piece 95.
The bimetal 93 is arranged in the vicinity of the input terminal 8 of the power supply side wire 6 by welding the horizontal piece 96 to the lower end of the side piece 91 of the frame cover 89. The detection electromagnet 94 includes the frame 53.
A first yoke 98 provided integrally with the first yoke 98, a fixed iron core 99 provided on the first yoke 98, a trip link drive rod 100 penetrating the fixed iron core 99, and a movable iron core 102 attached to the movable contactor 46 side. A return spring 101 that urges, a movable iron core 102 that forcibly opens the movable contact 46, a coil tube 103 that covers them, a coil 104 that winds the coil tube 103, and a first yoke 98 that is connected to the first yoke 98. It consists of two yokes 105. First
The yoke 98 connects the upper piece 106 and the lower piece 107, which face each other, to the connecting piece 10
The upper piece 106 is integrally formed on the frame 53 by being continuously connected to the frame main body 88 by being formed in a substantially U-shape through the frame 8. The fixed iron core 99 has a through hole 110, and the tip of the fixed iron core 99 is fitted into a fitting hole 109 formed in the connecting piece 108 of the first yoke 98 from the inside and fixed by caulking.

The trip link drive rod 100 is formed into a columnar shape which is longer than the fixed iron core 99 as a whole, and has a through hole of the fixed iron core 99.
It is inserted into 110 swingably. The return spring 101 is formed in a coil shape, is compressed and installed between the fixed iron core 99 and the movable iron core 102, and urges the movable iron core 102 toward the movable contactor 46 side. The movable iron core 102 is slidably fitted in the coil tube 103, and the forced opening rod 111 protruding from one end of the movable iron core 102 protrudes outside from the small diameter part of the coil tube 103 and has a collar portion at its tip.
112 is formed and penetrates the blunt hole of the movable contact 46.
The coil tube 103 has a through-hole and is composed of a large-diameter portion and a small-diameter portion, and the small-diameter portion has a fitting hole for a second yoke 105 described later.
It is fitted to 116 from the inside. The coil 104 is the coil tube 103.
The end portion is folded back in the axial direction and is welded to a protrusion 191 of a terminal plate 187, which will be described later. Further, one end of the copper stranded wire 113 is welded to the other end of the coil 104, and the other end of the copper stranded wire 113 is welded to the vertical piece 95 of the bimetal 93, thereby connecting to the bimetal 93. Second
The yoke 105 is composed of a lower piece 114 and a side piece 115 connected to the lower piece 114, and has a fitting hole 116 into which the small diameter portion of the coil tube 103 is fitted. Further, a hooking portion 117 for hooking the opening spring 47 to bias the movable contact 46 in the opening direction is provided at the tip of the side piece 115.

The arc extinguishing device 25 includes an arc traveling plate 118 for making an arc generated at the time of short circuit interruption away from a contact 60 consisting of a movable contact 63 and a fixed contact 92, an arc extinguishing grid 119 for dividing and cooling the arc. An exhaust port of the body 2 which is composed of an arc gas recirculation side plate 120 that protects the body 2 and the arc separator 3 from the arc and forms a circulation flow path of the arc gas.
The divided and cooled gas is exhausted from 30. The arc traveling plate 118 is composed of an arc traveling plate main body 121 and a fixed contact 122. The arc traveling plate body 118 is composed of a rectangular auxiliary piece 123 and a square main piece 124 connected to the auxiliary piece 123. This arc running board body 11
A protruding rib 125 is provided on the center line of 8 from the auxiliary piece 123 to the main piece 124 so that the arc can be easily traveled and sticking can be avoided. The fixed contact 122 includes a support piece 126 having a base end portion continuously connected to the arc traveling plate body 121, and the support piece 12.
A fixed contact 92 is provided in the vicinity of the base end of the protruding piece 127. Arc-extinguishing grid
119 is formed by laminating horseshoe-shaped plates 128, and is arranged so as to cover the main piece 124 of the arc traveling plate body 121, and divides and cools the arc. The arc gas recirculation side plate 120 is arranged so as to sandwich the sub-piece 123 of the arc traveling plate 118 and to engage with the base end of the projecting piece 127 of the fixed contact 122. In addition, the power supply side wire 6 to be described later is connected from the protruding piece 127 through the power supply side wire 128.
It is connected to the leg 199 of the terminal plate 194 of the output terminal 9 of.

Next, the operating principle of the shutoff mechanism 24 will be described with reference to FIGS. 1 to 4 and 25 to 32.

That is, the operation handle 52 is attached to one of FIGS.
25 to FIG. 28, the second movable shaft 58 is latched by the trip link 50 when the second movable shaft 58 is latched by the trip link 50.
The slit 71 of 49 is moved from the upper side to the lower side, and the second movable shaft 58 moves the connecting link 48. Then, when the third movable shaft 59 moves beyond the straight line connecting the second movable shaft 58 and the second fixed shaft 55, the third movable shaft 59 is rapidly reversed so that the movable contactor 46 connected to the connecting link 48 moves to the first position. 1 fixed shaft 54
Is rotated about, and as shown in FIGS. 25 to 28,
The movable contact 63 contacts the fixed contact 92. At this time, the first fixed shaft 54 is located in the middle of the elliptical slit 61 a provided in the middle portion of the movable contact 46, and applies a contact pressure to the movable contact 63. Further, in the overcurrent trip in the trip state, when the overcurrent flows in the electric path in the ON state shown in FIGS. 1 to 4, the gap adjusting screw 97 gradually urges the bimetal interlocking plate 77 due to self-heating of the bimetal 93. As a result, the trip link 50 is pushed, the connecting piece 70 of the latch link 49 is disengaged from the locking portion 75, the latch link 49 is rotated by the opening spring 47, and the movable contact 46 is moved by the first fixed shaft 54. It rotates in the direction away from the fixed contact 92 about the center. Then, as shown in FIGS. 29 to 32, the power source side contact
While opening 60, the movable shaft 58 is caught by the opening edge 89a of the frame cover 89, and the operation handle 52 is held at the neutral position. In the short circuit trip, when the short circuit current flows in the electric path in the ON state shown in FIGS. 1 to 4, the movable iron core 102 of the detection electromagnet 94 is attracted to the fixed iron core 99. As a result, the trip link drive rod 100 is pushed out and pushes the movable iron core interlocking plate 79 of the trip link 50, and the trip link 50 rotates so that the latch link 49 is released.
46 opens. However, the movable contactor 46 is connected to the movable iron core 10 before the contact is opened by such link interlocking.
At the same time as the second operation, the flange portion 112 of the movable iron core 111 is locked to the movable contactor 46 and attracted to move the movable contact 63 away from the fixed contact 92. That is, just before the latch link 49 is tripped, the movable contact 46 rotates in the direction of compressing the opening spring 47 about the first fixed shaft 54 to perform the opening operation.

The leakage detecting device 26, as shown in FIGS. 33 to 37, is a zero-phase current transformer 129 for detecting an unbalanced current in an electric circuit.
And a control circuit unit 13 for amplifying the output of the zero-phase current transformer 129.
0 and the operation part 137 of the test button 27 described later on the housing 1
A movable contact plate 131 that holds the movable contact plate 131 so as to project from the fixed contact shaft 132 that generates an unbalanced current in the zero-phase current transformer 126 via a test circuit unit 141, which will be described later, by contacting the movable contact plate 131. , And a leakage detection substrate 133 to which these components are attached.
3 is arranged near the output terminal 9 of the power supply side wire 6. It should be noted that the leakage detecting substrate and the zero-phase current transformer may be separately provided. The leakage detecting substrate 133 is provided with a slit 134 through which the neutral electric wire 216 can pass. By mounting the upper end of the leakage detection substrate 133 in the cut groove 35 of the body 2 and the zero-phase current transformer 126 in the recess 36 of the body 2, the leakage detection device 26 is installed in the housing 1. ing. In addition, the control circuit unit 130 has an amplifier 13 that outputs a signal when the unbalanced current flowing in the electric circuit exceeds the sensitivity current.
5 and a switching element 136 composed of a thyristor which is turned on when a signal output from the amplifier 135 is output. The switching element 136 may be composed of a transistor.

The test button 27 is actually operated from the upper surface of the housing 1, and has a substantially cylindrical operation portion 13
7 and a leg portion 138 extending from the lower surface of the operating portion 137, which is mounted in the operating hole 16 so that the operating portion 137 projects to the upper surface of the housing 1. Also, the tip of the leg portion 138 has a cut groove 140 at the center to give elasticity, and when it is inserted into the operation hole 16, it is locked inside the operation hole 16 and abuts against the movable contact plate 131. A section 139 is provided. By pressing the test button 27, the movable contact plate 131 comes into contact with the fixed contact shaft 132, and the zero-phase current transformer is passed through the test circuit unit 141.
Generate an unbalanced current in 126. The test circuit unit 141 includes a current limiting resistor 142 that limits a current and a test winding 143.

The test button 27 is actually operated from the upper surface of the housing 1, and has a substantially cylindrical operation portion 13
7 and a leg portion 138 extending from the lower surface of the operating portion 137, which is mounted in the operating hole 16 so that the operating portion 137 projects to the upper surface of the housing 1. Also, the tip of the leg portion 138 has a cut groove 140 at the center to give elasticity, and when it is inserted into the operation hole 16, it is locked inside the operation hole 16 and abuts against the movable contact plate 131. A section 139 is provided. By pressing the test button 27, the movable contact plate 131 comes into contact with the fixed contact shaft 132, and the zero-phase current transformer is passed through the test circuit unit 141.
Generate an unbalanced current in 126. The test circuit unit 141 includes a current limiting resistor 142 that limits a current and a test winding 143.

The earth leakage display device 28 has a housing when an earth leakage occurs.
1 is an electric leakage display member 144 projecting from the upper surface of the housing 1, and a spring for projecting the electric leakage display member 144 from the operation hole 15 of the housing 1.
145, first and second transmission levers 146 and 147 for rotating the trip ring 50 to trip the opening / closing mechanism portion 44,
Consists of a tension spring 148 that pulls the second transmission lever 147 toward the lower surface of the body 2, and an electromagnet device 149 that rotates the second transmission lever 147 by the current amplified by the control circuit unit 130 of the leakage detection device 26. Has been done. Leakage indicator 144
Has a cylindrical shape and is an operation hole of the housing 1 when an electric leakage occurs.
The display part 150 protruding from 15 and the operation hole 15
The leg portion 151 has a cut groove 152 into which one end of a spring 145 is inserted and a locked piece 153 to be locked to the first transmission lever 146. Spring 145
Is formed in a coil shape and is attached to the second fixed shaft 55 and
154 is inserted into the spring shaft hole 85 of the operation handle 52, and the other end 155 is inserted into the cut groove 152 of the earth leakage display member 144, and they are attached so as to urge them upward in FIG. The other end 155 has the operation handle 52 at the neutral position,
When operating handle 52 is moved to the open position, operating handle
It has an abutting portion 156 that abuts the other end of the swinging portion 83 of 52. The first transmission lever 146 has a vertical piece 157 having an opening 159, and an engagement portion 160 which is connected to the vertical piece 157 and which engages with the engagement portion 167 of the second transmission lever 147. The engaging piece 158 is formed. Also, these vertical pieces 15
An insertion recess 161 into which the third fixed shaft 56 of the frame 53 is inserted is provided between the 7 and the engagement piece 158, and the third fixed shaft 56 is inserted into the insertion recess 161 and the opening 159 is inserted. The first transmission lever 146 is rotatably held by the frame cover 89 by inserting the protrusions 78 of the trip link 50. The second transmission lever 147 includes a diagonal piece 162 having a locking portion 166 for locking the locked portion 153 of the leakage indicator member 144 at the tip, and the first transmission lever connected to the diagonal piece 162.
Engaging piece having engaging portion 167 engaging engaging portion 160 of 146
163 and the diagonal piece 16 are connected to the lower side of the locking portion 166 of the diagonal piece 162.
It is installed in the direction that intersects 2 and has a tension spring.
Hook shaft 164 hooked on the hook of 148 and diagonal piece 162
Which are connected to the side surface of the
It is composed of a locking piece 165 for locking the movable iron core 171 of 149. In addition, the insertion concave portion 16 into which the first fixed shaft 54 of the frame 53 is inserted is provided between the oblique pieces 162 and the engagement pieces 163 in series.
The second transmission lever 147 is rotatably held by the frame cover 89 by mounting the first fixed shaft 54 in the insertion recess 168. According to the present embodiment, the transmission lever that transmits the output of the leakage detection device to the cutoff mechanism is composed of two members, but any number of members can be applied.

The tension spring 148 is formed in a coil shape, and is hooked on the hook shaft 164 of the second transmission lever 147 and the hook shaft 37 of the body 2. The electromagnet device 149 includes a coil bobbin 169 around which a coil is wound, a fixed iron core 170, and a movable iron core 17.
1 and a yoke 172. Coil bobbin
169 is the central portion 173 around which the coil is wound and the central portion 17
Collar part 17 that is continuous with 3 and is formed so as to sandwich the central part 173.
4 and one of the collars 174 to the other.
Through-holes 175 are formed at both ends reaching 174. In addition, the collar portions 174 at both ends include an upper piece 182 of a yoke 172, which will be described later.
A recess 176 is formed in which the lower piece 183 and the lower piece 183 are fitted into each other. The coil terminals 177 at both ends of the coil bobbin 169 are connected to the control circuit unit 130 and the test circuit unit 141 of the earth leakage detection device 26 via lead wires (not shown). Fixed iron core 170
Is a coil bobbin 1 having a substantially cylindrical shape and having a cut groove 178.
It is inserted into the through hole 175 of 69 and is held by the holding recess 185 of the yoke 172 described later. The movable iron core 171 includes a columnar movable iron core body 179, a continuous shaft 180 continuous with the movable iron core body 179, and an engagement piece 165 engaged with an engagement piece 165 of the second transmission lever 147. The movable iron core body 179 is inserted into the through hole 175 formed in the coil bobbin 169 and is retained by the holding recess 185 of the yoke 172, so that the movable iron core 171 cannot fall from the coil bobbin 169. There is no. The yoke 172 is an upper piece 182 facing each other.
The lower piece 183 and the lower piece 183 are formed into a substantially U-shape via the connecting piece 184, and the upper piece 182 and the lower piece 183 are fitted in the recess 176 of the collar 174 of the coil bobbin 169 in a concavo-convex manner to form a coil bobbin. It is mounted on the 169. Also, this upper piece 182 and lower piece
183 includes a groove 178 on the fixed core 170 and a movable core body 17
Retaining recess for holding 9 and 9 so that they do not come out of the through hole 175
85 are provided.

The operation principle of the earth leakage detection device 26, the test button 27 and the earth leakage display device 28 will be described with reference to FIGS. 33 and 37. In the figure, 8 is an input terminal for connecting the power supply side wire 6, 216 is a neutral wire for connecting the ground side wire 7,
Reference numeral 9 is the output terminal of the power supply side wire 6 that connects the load, and 10 is the output terminal of the ground side wire 7 that connects the load.

That is, when an unbalanced current flows in the electric path,
The zero-phase current transformer 129 detects the secondary output and generates the secondary output.
The moving iron core 171 of the electromagnet device 149 is fixed to the stationary iron core by exciting the coil by amplifying with 135 and turning on the switching element 136.
When the locked portion 181 of the movable iron core 171 is sucked toward the 170 side and pushes up the locking piece 165 of the second transmission lever 147, the second transmission lever 147 rotates about the first fixed shaft 54, and The engaging portion 167 of the second transmission lever 147 pushes down the engaging portion 160 of the first transmission lever 146, and the first transmission lever 146 rotates about the third fixed shaft 56, and the first transmission lever 146. The trip link 50 is inserted into the opening 159 of the
Rotate around. Then, the movable contact 63 is pulled out from the fixed contact 92 to open the power supply side contact 60, similarly to the trip operation of the breaking mechanism 24 described above. Also, the second transmission lever
The rotation of 147 disengages the locked portion 153 of the earth leakage display member 144 from the engagement portion 166, and the display portion 150 of the earth leakage display member 144 is attached by the spring 145 attached together with the operation handle 52 via the second fixed shaft 55. Protrudes from the operation hole 15 of the housing 1, and the operation handle 52 is held at the neutral position. Furthermore, when conducting a leakage test, the test button 27 is pressed to bring the movable contact plate 131 into contact with the fixed contact shaft 132, and a signal is applied to the test circuit section 141, so that an unbalanced current flows in the zero-phase current transformer 129. Occurs, the electromagnet device 149 works, and the movable iron core 171 is attracted. Therefore, as described above, the movable contact 63 is disengaged from the fixed contact 92 by the breaking mechanism 24.

When the display portion 150 of the leakage display member 144 projects from the operation hole 15 of the housing 1 due to the electric leakage and the operation handle 52 is in the neutral position, when the operation handle 52 is displaced toward the opening position, The other end of the swinging portion 83 of the operation handle 52 comes into contact with the contact portion 156 formed on the spring 145, and the other end 155 of the spring 145 moves downward in FIG. As a result, the leakage indicator member 144, into which the other end 155 of the spring 145 is inserted, is displaced toward the inside of the housing 1, and due to this displacement, the locked portion 153 of the leakage indicator member 144 locks the second transmission lever 147. It is locked to the part 166. According to the present embodiment, when the display portion of the earth leakage display member projects from the operation hole of the housing and the operation handle is in the neutral position,
Although the leakage indicator member is locked to the second transmission lever by moving the operation handle toward the opening position, the leakage indicator member is moved to the second transmission lever by moving the operation handle toward the closing position. It can also be applied to the one that is locked to the transmission lever.

The terminals are input / output terminals 8 and 9 of the power supply side wire 6.
And an output terminal 10 of the ground side wire 7. The input terminal 8 of the power supply side wire 6 is a terminal screw 186 having a driver operation hole 189 and a screw hole into which the terminal screw 186 is screwed.
A terminal plate 187 having a protrusion 191 connected to the coil 104 of the detection electromagnet 94 and a terminal screw 186.
And a nut 188 having a screw hole 192 into which is screwed, and the input terminal 8 of this power supply side wire 6 is mounted in the terminal groove 29 of the first section 23A. The output terminal 9 of the power supply side wire 6 has a driver operation hole 196 and has a chevron-shaped dowel 19
A terminal board 19 having a terminal screw 193 having a screw hole 198 with which the terminal screw 193 is screwed and a leg piece 199 having a screw hole 198 into which the terminal screw 193 is screwed and which is connected from the fixed contact 122 via the power supply side electric wire 128
4 and a nut 195 having a screw hole 200 into which the terminal screw 193 is screwed, and is mounted in the terminal groove 32 of the second section 23B. The input terminal 8 of the power source side wire 6 is electrically connected to the output terminal 9 of the power source side wire 6 via the contact 60 and the power source side wire 128. The output terminal 10 of the ground side wire 7 has a terminal screw 201 having a driver operation hole 205 and a chevron-shaped metal plate 206, and a screw hole 207 into which the terminal screw 201 is screwed, and the terminal separator 4 has a screw hole 207. A terminal plate 202 having a fixed side contact portion 208 penetrating the through hole 43, and a terminal screw
A nut 203 having a screw hole 209 into which 201 is screwed, a through hole 210 that overlaps with a screw hole 207 of the terminal board 202, and a cover portion 21 that covers the output terminal 9 of the power supply side wire 6.
The output terminal 10 of the ground side wire 7 is mounted in the terminal groove 42 of the terminal separator 4 which is located above the terminal groove 32 in which the output terminal 9 of the power supply side wire 6 is mounted. .

The neutral device 212 includes a neutral movable plate 213 that contacts the fixed-side contact portion 208 of the terminal plate 202,
The neutral handle 214 for pressing the neutral movable plate 213 against the fixed-side contact portion 208, and the neutral movable plate
A biasing spring 215 that biases 213 away from the fixed-side contact portion 208, and a neutral electric wire connected to the ground-side wire 7.
216 and. Neutral movable plate 213
Is a conductive material formed in a rectangular shape, and has an insertion hole through which a positioning protrusion 223 of a biasing spring 215 described later is inserted at one end.
217, and one end thereof is fixed to the neutral electric wire 216 by welding or the like, and is disposed in the contact portion 34 of the body 2 so as to face the fixed side contact portion 208 between the outer wall 13 and the inner wall 40. This neutral movable plate 213 and the fixed side contact portion 20
8 and 8 form a neutral contact 218. The neutral handle 201 is made of an insulating material such as synthetic resin and has a substantially elliptical shape in a side view, and has an annular portion 219 that comes into contact with the neutral movable plate 213 when rotated, and an uneven portion at a fixed position (not shown) of the body 2. Rotation spindle 22 that fits and becomes the center of rotation
0, an operating portion 221 that extends from the upper end surface of the inner wall 40 to be operated from the outside of the housing 1, and a neutral movable plate.
The protrusion 222 for pressing the fixed side contact portion 208 against the fixed side contact portion 213 is arranged inside the housing 1 so that the operation portion 221 projects into the neutral handle window hole 12 of the housing 1. The biasing spring 215 is formed of an elastic member in a coil shape, and by being mounted in the mounting recess 33b of the support portion 33, it biases the neutral movable plate 213 in the direction away from the fixed-side contact portion 208. . Also, this biasing spring 215
The positioning protrusion piece 223 positions the neutral movable plate 213 by inserting it into the insertion hole 217 of the neutral movable plate 213 into the insertion recess 34a of the insertion device body 2. In addition, the neutral movable plate 213 of this biasing spring 215
At the tip end that abuts on the, a seat 224 that widens the area for urging the neutral movable plate 213 is provided. One end of the neutral electric wire 216 is fixed to one end of the neutral movable plate 213, and is inserted into the slit 134 of the earth leakage detection substrate 133 through the zero-phase current transformer 129 and the insertion recess 38 of the arc separator 3, and the insertion hole 20 It is connected to the ground side (not shown) by protruding from the earth leakage breaker.

Next, a method for opening and closing the neutral device 212 will be described with reference to FIG. That is, the broken line in the figure shows a state in which the neutral handle 214 is tilted to open the neutral movable plate 213. In this state, the neutral movable plate 213 is in contact with the contact portion 34 of the body 2 by the urging force of the urging spring 215. In this state, rotate the operating part 221 of the neutral handle 214 so that it rises and the neutral handle 214 is rotated.
The tip of the protrusion 222 formed on 214 is the neutral movable plate.
The neutral movable plate 213 is pressed against the fixed-side contact portion 208 by abutting on the fixed-side contact portion 208. And the protrusion 222
When the neutral movable plate 213 is pushed beyond the center of the tip of the projection, the tip of the projection 222 is pushed obliquely upward and rightward in FIG. 38 by the pressing force of the biasing spring 215, and the neutral handle 214 fixes the neutral movable plate 213 on the fixed side. Contact part 208
It is fixed in the state of touching.

Next, a method for incorporating this earth leakage breaker in the distribution board will be described with reference to FIGS. 38 and 39. In the figure, 225 is a distribution board, which has a receiving frame 226 having a mounting bracket 229 for mounting the earth leakage breaker, a door 227 for opening and closing the opening of the receiving frame 226, and a window into which the handle protrusion 11 of the earth leakage breaker is inserted. An inner lid that has a frame 230 and conceals everything except the handle protrusion 11.
It consists of 228 and. This bracket 225 mounting bracket 22
By inserting 9 into the recesses 17 and 18 of the earth leakage breaker, the earth leakage breaker is incorporated into the distribution board 225.

According to this embodiment, the operation handle, the leakage display member, and the test button are arranged in this order from the input terminal side of the power supply side line, but they are arranged in order in the input / output terminal direction of the power supply side line. You can apply them in any order.

Further, according to the present embodiment, the bimetal is provided near the input terminal of the power supply side line and the control circuit of the leakage detection device is provided near the output terminal of the power supply side line, but the bimetal is provided near the output terminal of the power supply side line. Alternatively, the control circuit of the leakage detector may be provided near the input terminal of the power supply side line.

[0046]

According to the earth leakage breaker of the first aspect of the present invention, the operation handle, the earth leakage display member, and the test button are sequentially arranged in the input / output terminal direction on the handle protrusion of the housing.
It can be separated from the operation handle, earth leakage display member and test button of the next earth leakage circuit breaker.When the earth leakage circuit breakers are installed side by side, it is possible to know which earth leakage circuit breaker the operation handle, earth leakage display member and test button belong to. It will be easy.

According to the earth leakage circuit breaker of the second aspect, in the first aspect, the bimetal of the interruption mechanism is arranged near one side of the input / output terminal, and the control circuit section of the earth leakage detection device is arranged on the other side of the input / output terminal. Since it is provided near the side, in addition to the above effect, the heat generated by the bimetal is less likely to be transmitted to the control circuit unit, and the control circuit of the leakage detection device is less likely to break.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a partial vertical cross-sectional view of the one shown in FIG.

FIG. 3 is a partial vertical cross-sectional view of the one shown in FIG.

FIG. 4 is a partial vertical cross-sectional view of the one shown in FIG.

5 is a perspective view showing a state in which a cover is attached to FIG. 1. FIG.

FIG. 6 is a top view of FIG.

FIG. 7 is a front view of FIG.

FIG. 8 is a side view of FIG. 5 as seen from the input terminal side of the power supply side line.

9 is a side view of FIG. 5 viewed from the output terminal side of the power supply side line.

FIG. 10 is an exploded perspective view of that of FIG.

11 is a partially exploded perspective view of the one shown in FIG.

12 is a partially exploded perspective view of the one shown in FIG.

FIG. 13 is a partially exploded perspective view of that of FIG.

14 is a partially exploded perspective view of the one shown in FIG.

15 is a partially exploded perspective view of the one shown in FIG.

16 is a partially exploded perspective view of the one shown in FIG.

FIG. 17 is an exploded perspective view obtained by further disassembling FIG.

FIG. 18 is a partially exploded perspective view of that of FIG. 17;

FIG. 19 is a partially exploded perspective view of that of FIG. 17;

FIG. 20 is a partially exploded perspective view of that of FIG.

FIG. 21 is a partially exploded perspective view of that of FIG. 17.

22 is a partially exploded perspective view of the one shown in FIG.

23 is a partially exploded perspective view of the one shown in FIG.

FIG. 24 is a partially exploded perspective view of that of FIG. 17;

25 is a vertical cross-sectional view showing a state in which the handle of the one shown in FIG. 1 is turned on.

FIG. 26 is a partial vertical cross-sectional view of that of FIG. 25.

FIG. 27 is a partial vertical cross-sectional view of that of FIG. 25.

28 is a partial vertical cross-sectional view of the one shown in FIG. 25. FIG.

29 is a vertical cross-sectional view showing the tripped state of the one shown in FIG. 1. FIG.

30 is a partial vertical cross-sectional view of that of FIG. 29. FIG.

31 is a partial vertical cross-sectional view of that of FIG. 29. FIG.

32 is a partial vertical cross-sectional view of that of FIG. 29. FIG.

FIG. 33 is a circuit diagram of the leakage detection mechanism of FIG. 1.

FIG. 34 is a vertical cross-sectional view for explaining the trip operation of FIG. 1 due to electric leakage.

35 is a partial vertical cross-sectional view of that of FIG. 34. FIG.

36 is a partial vertical cross-sectional view of that of FIG. 34. FIG.

FIG. 37 is a partial vertical cross-sectional view of that of FIG. 34.

38 is a longitudinal sectional view showing the neutral device of FIG. 1. FIG.

FIG. 39 is a vertical cross-sectional view showing a state in which the one shown in FIG. 5 is incorporated in a distribution board.

FIG. 40 is a front view showing a state in which the one shown in FIG. 5 is incorporated in a distribution board.

[Explanation of symbols]

 1 Housing 6 Power line 7 Ground line 8 Power line input terminal 9 Power line output terminal 11 Handle protrusion 24 Breaking mechanism 26 Leakage detector 27 Test button 28 Leakage indicator 52 Operation handle 60 Contact 82 Operation handle operation 93 Bimetal 129 Zero-phase current transformer 130 Control circuit section 144 Earth leakage indicator

Claims (2)

[Claims] 1. A housing for accommodating a power supply side wire of an electric path having a contact inserted therein and a grounding side wire arranged in parallel with the electric power supply path, equipped with at least input / output terminals of the power supply side wire, and having an upper surface of a distribution board with a cover. A housing provided with a handle protrusion that is inserted into the window hole of
An operating handle that opens and closes the contact protruding from the handle protrusion and a bimetal that detects overcurrent flowing between the contacts, and a breaking mechanism that forcibly opens the contacts in response to this bimetal and an unbalanced electric path A zero-phase current transformer that detects a current and a leakage detection device having a control circuit unit that processes the detection signal, and a signal that supplies an unbalanced current to the zero-phase current transformer, and is provided on the upper surface of the housing. An electric leakage breaker equipped with a test button provided on the housing and an electric leakage display member provided on the upper surface of the housing for displaying an electric leakage in response to the output of the electric leakage detection device. An earth leakage circuit breaker characterized in that a display member and a test button are sequentially arranged in the direction of the input / output terminals. 2. The earth leakage according to claim 1, wherein the bimetal of the breaking mechanism is arranged near one side of the input / output terminal, and the control circuit section of the earth leakage detection device is arranged near the other side of the input / output terminal. Circuit breaker.