JPH08161998A - Tripping device of earth leakage breaker - Google Patents

Abstract

PURPOSE: To enable leakage display to be reset both automatically and manually by installing a leakage indicating button on the electromagnet yoke portion of a leakage tripping device in such a way that it can move vertically, and locking a connection of the plunger of an electromagnet and a handle to the leakage indicating button. CONSTITUTION: A trip coil 53a is excited at the detection of a preset leakage current and then a trip hook 53i presses a rod 5c to the right in the figure, thereby opening a handle 4 in a closed position. Also, a leakage indicating button 54 projects to the outside of a leg integrated with the locking portion of the leakage indicating button 54 and with an attracting iron core. Since the leakage indicating button 54 is connected to a spring 57, the leakage indicating button 54 is automatically reset simply at the reclosure of the handle 4. The leakage indicating button 54 can also be reset manually. Thus the leakage indicating button 54, a test button 55 and a lead wire can be integrated together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth leakage trip device for an earth leakage breaker.

[0002]

2. Description of the Related Art As described in Japanese Utility Model Laid-Open No. 4-129457, a conventional electromagnetic trip coil and a unit product of a test terminal portion have a test terminal portion exposed on the surface, and a test button is tested. , It is dangerous because the charging part is exposed. In addition, the so-called slow-make mechanism was adopted for the opening and closing mechanism of the earth leakage breaker in Jikkei 1-28618, and the earth leakage display can be automatically reset by the handle-on operation. In addition, there is described an earth leakage trip device that can reset the earth leakage display manually, and the earth leakage display button is reset when the main circuit is reclosed in conjunction with the movable contact rod of the main circuit. Is displayed, but the fact that the earth leakage display button returns when the handle is turned on means
The main circuit of the main body must be able to be reset because the leakage indicator button is protruding, and at the time of resetting, the latch part of the main leakage circuit must be engaged after the latch part of the main circuit is engaged. In order to do so, the movement of the plunger needs to be in two stages so that the leakage indicator button is projected and then the main body is removed with a margin, and the stroke of the plunger in the leakage trip coil becomes large. Therefore, there was a tendency that the total space of the earth leakage trip device increased.

[0003]

A leakage indicator that can be downsized by integrating a leakage indicator button, a test button, a test terminal section, a test resistor, etc. with an earth leakage trip device and is also applicable to a small earth leakage breaker. We provide a structure that can be reset automatically by turning on the handle and the leakage display can be reset manually.

[0004]

[Means for Solving the Problem] A leakage display button and a test button are inserted into a hole in an upper flat portion adjacent to a leakage trip device, and a test terminal portion is provided at an upper end of an insulating housing having a mounting support portion. With the integrated structure in which the test resistor is installed in the mounting support part, and the structure in which the handle rotation part is connected with the earth leakage display button that engages with the earth leakage display button that engages with the hook at the plunger tip of the earth leakage trip device in the above structure A structure will be realized in which the leakage display can be automatically reset by turning on the handle and the leakage display can be reset manually.

[0005]

According to the present invention, the test terminal portion is inserted in the insulating housing below the earth leakage trip coil, the test resistance is inserted in the mounting support portion of the insulation housing, and the earth leakage display button and the test button are also integrated into one body. The lead wire of the trip coil and the lead wire of the test terminal section pass through the inside of the insulating housing and are drawn out to the bottom of the earth leakage breaker, so the insulation from the main circuit is ensured and the test terminal section and Since the test button is also integrated into the unit and the charging part is not exposed, the test of the test button can be performed safely, and the structure is such that the leakage indicator button and the handle rotating part are connected. It is possible to realize a structure in which the handle can be automatically reset by turning on the handle and the leakage display can be manually reset.

[0006]

EXAMPLES Examples will be described with reference to the drawings. The outline of the earth leakage breaker of the present invention is as follows. Reference numeral 1 is a mounting frame having an opening / closing mechanism part which has a sandwiching structure.
The arc-shaped grooves 1a, 1a are provided at the upper ends of the two side surfaces. Reference numeral 4 denotes a handle. The handle 4 is inserted into the protrusions 1b, 1b having a hole at the center of the upper end of the mounting frame 1, and the spiral spring 4a is inserted into the hole by the shaft 4b. One end of the spring 4a is attached to the mounting frame 1
The setting is performed by inserting the spring 4a into the hole 1c at the front end of the mounting frame 1 by inserting the spring 4a into the hole 1c.

Reference numeral 6 denotes a link, one end of which pivotally supports a roller 9, and the other end of which a shaft 6a penetrates a hole at the side end of the handle 4 and the grooves 1a and 1a to open and close the handle 4 in the front-rear direction. As a result, the shaft 6a slides in the grooves 1a, 1a.

Reference numeral 7 denotes a link, which has linear elongated holes 8 and 8 on two side surfaces of a substantially lower half, a rectangular engaging portion 7a at a lower portion of a sandwiching portion of the link 7, and a hole at an upper end. The shaft 7b
The support structure is rotatable in the hole on the right-angled line of the engaging portion 7a on the upper end load side of the mounting frame 1.

Numeral 5 is an operating rod, which is used after the leakage current is detected.
Push the rod part 5c of No. 2 to the power supply side with the leakage removal part. If it does not trip, it is attached to the rotating part of the operating rod 5.
The engaging portion 5b of the operating rod 5 and the engaging portion 7a of the link 7 are engaged by the reaction force of the spring 5a.

The roller 9 is sandwiched between the elongated holes 8 and 8, and a cross plate for opening and closing the fixed contact portion 2 and the movable contact portion 3 below the roller 9 by opening and closing the handle 4 in the front-back direction. Set 10.

When the leakage current is detected, the rod portion 5c of the operating rod 5 is pushed toward the power source side, the engaging portion 5b of the operating rod 5 and the engaging portion 7a of the link 7 are released, and the roller 9 is released. Slides down to the load side of the cross plate 10.

When the handle 4 is reset, the roller 9
Forcibly moves upward in the long holes 8 of the link 7 and returns to the cross plate 10, and at the same time, the engaging portion 7 of the link 7
a by the reaction force of the spring 5a locked on the operating rod 5,
The engagement portion 5b of the operating rod 5 is returned to the original engagement state.

Reference numeral 11 is an electronic circuit section, and 12 is a zero-phase current transformer. The zero-phase current transformer 12 detects a leakage current flowing in the main circuit, and then the electronic circuit section 11 performs amplification.

The earth leakage trip device of the present invention will be described below. 51 is an insulating housing, and insulating housing 5
1 is a wall 51 on two surfaces of the handle 4 side which are perpendicular to each other.
a and the wall 51b, and the hole 51c is formed in the lower adjacent portion of the wall 51a.
A side portion 51d having a side wall 51d, and a mounting support portion 51e inserted into the groove 60 of the hollow circuit breaker base portion side wall below the insulating housing 51, and the upper end 51f and the lower end 51g of the insulating housing 51 are open. Further, a hole 51h is further provided on the side of the upper end 51f.

53a is a trip coil, 53b is a bobbin, and bobbin 53b has a protrusion 53j at the bottom thereof.
Is a yoke forming a magnetic circuit, and 53d is an overhanging portion integrally formed with the bobbin 53b and has two holes 53e and 53f. Reference numeral 53g is a suction iron core incorporated in the trip coil 53a together with the iron core return spring 59.
At the tip of g, a component 53l including a leg 53h and a tripping hook 53i is attached. 53k is a trip coil 53
It is a lead wire drawn from a. Reference numeral 53 is an earth leakage trip device, which is a trip coil 53a, a bobbin 53b, and a yoke 5.
3c, an overhang portion 53d, a suction iron core 53g, an iron core return spring 59, a constituent portion 53l, and a lead wire 53k.

Reference numeral 56 denotes a test terminal portion which is a charging portion, and a curved portion 56 which constitutes one end of the test terminal portion 56.
a is fitted to the upper end 51f, and is installed in the hollow portion of the mounting support portion 51e so as to contact the end portion 58a of the test resistor 58. Attach the lead wire 56b from the bent portion 56a to the support portion 51e.
Through the hollow part of the.

Reference numeral 55 is a test button, which is an elongated rod-shaped leg portion 55.
a. Reference numeral 54 is an earth leakage display button, which is an elongated rod-like shape, and has a leg portion 54a having a groove 54c at an upper end of the earth leakage display button 54 and an engaging portion 54b. Test button 55 overhang part 5
The leakage display button 54 is inserted into the hole 53f of the 3d, into the hole 53e of the projecting portion 53d, so that the leg 53h of the component 53l and the engaging portion 54b are engaged with each other.

The earth leakage removing device 53, which is incorporated together with the earth leakage display button 54 and the test button 55, has a lead wire 53k.
Is inserted into the hole 51h on the side of the insulating housing 51, is passed through the hollow portion of the mounting support portion 51e, the mounting support portion 51e is installed in the groove 60 of the base side wall, and the lead wire 53k is connected to the electronic circuit portion 11. To be done. Protrusion 5 of bobbin 53b
3j is fitted to the upper end 51f of the insulating housing 51, and the leg portion 54a of the leakage indicator button 54 is connected to the hole 51 of the insulating housing 51.
It is set on the insulating housing 51 by inserting it into c and installing the leg portion 55a of the test button 55 so as to contact the tip 56c of the test terminal portion 56.

Reference numeral 57 denotes a spring, and the torsion coil portion of the spring 57 is locked to the shaft 4b integrated with the rotating portion of the handle 4, and the end portion 57a obtained by bending the end portion of the spring 57 is used as the insulating housing 51. Earth leakage trip device 53 installed inside
And the earth leakage display button 54, the groove 54c of the earth leakage display button 54
End 57 with the other end of the spring 57 bent
b is locked in the hole 51i on the side of the insulating housing 51a. The main parts of the earth leakage trip device are configured as described above.

When the set leakage current is detected, the trip coil 53a is excited to trip the trip hook 53i.
Pushes the rod portion 5c to the right side in FIG. 5 to open the closed handle 4. At the same time, the engaging portion 54b of the earth leakage display button 54 and the leg 53h integrated with the suction iron core 53g are disengaged, and the earth leakage display button 54 projects to the outside of the overhang portion 53d by the reaction force of the spring 57. The leakage display button 54 is automatically reset because the leakage display button 54 is connected to the spring 57 only by reclosing the handle 4. Of course, the leakage indicator button can be reset manually. As described above, it becomes possible to integrate the leakage display button, test button, and lead wire, which were previously dispersed, into a compact, integrated structure. did it.

FIG. 8 shows a second other embodiment of the automatic reset structure of the earth leakage display button of the earth leakage trip device, which is a part of the insulating mold of the huddle 66a and has a supporting portion 61a on the side thereof, so that the earth leakage occurs. The support portion 61a beside the earth leakage display button 62a, which is biased by the spring 63a from below the display button 62a and is engaged with the hook portion 64a of the electromagnetic trip coil, is directly pushed in the direction of the arrow at reset. 9 shows a third other embodiment of the structure for automatically resetting the earth leakage display button of the earth leakage trip device.
Is urged by the electromagnetic tripping coil hook 64
The leakage indicator button 62b engaged with b, the lever portion 65 having the support portion 61b in the hole on the upper surface of the leakage indicator button 62b, and the shaft 65a are made rotatable through a part of the insulating mold of the handle 66b. In this structure, the support portion 61b of the lever portion 65 is directly pushed in the direction. None of them corresponds to the spring 57.

[0022]

The test terminal plate is inserted in the insulating housing below the earth leakage trip coil, the test resistance is inserted in the mounting support portion of the insulation housing, and the earth leakage display button and the test button are integrally attached. Since the lead wire of the trip coil and the lead wire of the test terminal board pass through the inside of the insulating housing and are drawn out to the bottom of the earth leakage breaker, they are reliably insulated from the main circuit. Since the test button is also integrated into the unit and the charging section is not exposed, the unit can be tested independently. Moreover, since the entire leakage trip device can be integrated and miniaturized, there is a margin when it is mounted on a small leakage breaker. Moreover, with the above structure, the leakage indicator button that engages with the hook at the tip of the plunger of the leakage trip device is connected to the handle rotating part, so that the leakage indicator can be automatically reset by turning the handle on, and the leakage indicator can be reset manually. A possible structure is possible.

[Brief description of drawings]

FIG. 1 is a side sectional view of an earth leakage circuit breaker of the present invention.

FIG. 2 is a side sectional view showing a state in which the switching mechanism of the earth leakage circuit breaker of the present invention is opened.

FIG. 3 is a front view showing a state in which an opening / closing mechanism of the earth leakage circuit breaker of the present invention is opened.

FIG. 4 is a diagram showing an assembled state of an earth leakage trip device for an earth leakage breaker and an insulating housing of the present invention.

FIG. 5 is a diagram showing a first embodiment in which an earth leakage trip device for an earth leakage breaker according to the present invention is assembled in an insulating housing.

FIG. 6 is a side sectional view of a first embodiment of an assembly of an earth leakage trip device for an earth leakage breaker and an insulating housing according to the present invention.

FIG. 7 is a front view of a first embodiment of an assembly of an earth leakage trip device for an earth leakage breaker and an insulating housing according to the present invention.

FIG. 8 is a diagram showing a second embodiment of the automatic reset structure of the leakage trip device for the leakage breaker of the present invention.

FIG. 9 is a diagram showing a third embodiment of the automatic reset structure of the leakage trip device for the leakage breaker of the present invention.

FIG. 10 is a front view of the leakage breaker of the present invention with a cover removed.

[Explanation of symbols]

 1 Mounting Frame 1a Groove 1b Projection 1c Hole 2 Fixed Contact Part 3 Moving Contact Part 4 Handle 4a Spring 4b Shaft 5 Actuating Rod 5a Spring 5b Engagement Part 5c Rod Part 6 Link 6a Shaft 7 Link 7a Engagement Part 7b Shaft 8 Long Hole 9 Roller 10 Cross plate 11 Electronic circuit part 12 Zero-phase current transformer 51 Insulation housing 51a Wall 51b Wall 51c Hole 51d Side part 51e Mounting support part 51f Upper end 51g Lower end 51h Hole 51i hole 53 Electric leakage trip device 53a Coil 53b Bobbin 53c Yoke 53d Overhanging portion 53e Hole 53f Hole 53g Suction iron core 53h Leg 53i Pull-out hook 53j Projection portion 53k Pull-out lead wire 53l Component portion 54 Leakage indicator button 54a Leg portion 54b Engaging portion 54c Groove 55 Test button 55a Leg portion Terminal part 56a Curved part 56b Lead wire 56c Tip 57 Spring 57a End 57b End 58 Test resistance 58a End 59 Iron core return spring 60 Groove 61a Support 61b Support 62a Leakage indicator button 62b Leakage indicator button 63a Spring 63b Spring 64b Hook Part 65 lever part 65a shaft 66a handle 66b handle

Claims (6)

[Claims] Claim: What is claimed is: 1. A circuit breaker which is closed when a handle is turned, a leakage detection electromagnet installed in the circuit breaker, and a leakage breaker for displaying a circuit break and a leakage by the operation of the leakage detection electromagnet. In the disconnecting device, an earth leakage display button movably installed in an electromagnet yoke portion of the earth leakage removing device, and an electromagnet plunger engaging with the earth leakage display button,
A device for tripping an earth leakage breaker, in which a connector of a handle is engaged with the earth leakage display button. 2. The trip device for the earth leakage breaker according to claim 1, wherein the end of the earth leakage display button, the handle rotating portion and the side wall of the insulating housing are connected by a spring. 3. The trip device for the earth leakage breaker according to claim 1, wherein a spring is provided below the earth leakage display button, and the lower portion of the handle is pressed against the support portion of the earth leakage display button when resetting. 4. A structure in which a spring is provided below the earth leakage display button, a lever having a supporting portion and the earth leakage display button are rotatable, and the lower portion of the handle is pressed against the supporting portion of the lever at the time of resetting. The trip device for an earth leakage breaker according to claim 1. 5. An earth leakage trip device having a test button and an earth leakage display button, and an earth leakage circuit breaker for interrupting a circuit by the operation of the earth leakage trip device, wherein a side wall formed in an L shape at an upper portion and formed below the side wall. Insulating housing part consisting of a hollow storage part and a projecting mounting support part formed below the storage part, a test terminal part installed on the storage part, and an upper part of the test terminal part. An earth leakage trip device, an earth leakage trip device, and an earth leakage breaker trip device in which lead wires of a test terminal portion are passed through a hollow mounting support portion. 6. A circuit breaker according to claim 5, wherein the test terminal portion installed in the housing portion of the insulating housing portion is covered with the earth leakage trip device, and the test resistance of the earth leakage trip device is contained in the mounting support portion. Removal device.