JP2002075164A - Ground leakage breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ground leakage breaker which will not cause troubles regarding contacting of the finger tip of an operator to a handle, when operating a test button, even though its width is smaller than that of one pole of an agreed type (specified by JIS). SOLUTION: In a ground leakage breaker, of which the width is less than that of one pole of specified type, a test button 14 of a ground leakage detective circuit is fitted on the on-side of a handle 13, so that contacting of the finger tip of an operator to a handle, when operating a test button, is prevented. Additionally, it is desirable that an electrical source terminal 11 be a plug-in type and that a mechanical member 17 be fixed under the handle 13 and a ground leakage detective base 19 be placed under the test button of an electrical source side and that an exhaustion hole 20 be formed on a housing, which extends from the mechanism member 17 to load side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth leakage breaker having a width of not more than one pole of a collective type.

[0002]

2. Description of the Related Art An earth leakage circuit breaker includes a mechanism for opening and closing a movable contact in conjunction with a handle, a ZCT for earth leakage detection and a circuit board for earth leakage detection. Requires a test button to make sure it works. As shown in FIG. 5, in the case of the earth leakage breaker having a width twice as large as that of the circuit breaker for wiring, the power supply side terminal 1 is connected to half of the case.
In some cases, a test unit 3, a display button 4, and a load-side terminal 5 were provided on the other half of the case.

In the earth leakage circuit breaker as shown in FIG. 5, the handle 2 and the test button 3 are located laterally on a panel cut surface exposed on the distribution board surface. For this reason, when the test button 3 is pressed with a fingertip, if the leakage detection circuit is normal, the mechanism trips and the handle 2 operates.
Never hit the finger.

However, the dimensions of the earth leakage breaker are gradually reduced, and when the width is less than the width of a single pole (25 mm) shown in JIS C 8370, the area of the panel cut surface is reduced, and the handle 2 and the test button are cut off. 3 cannot be arranged in the lateral direction as shown in FIG. For this reason, an earth leakage breaker provided with a test button 3 below the same line as the handle 2 (OFF operation side of the handle) is commercially available.

In general, in a circuit breaker such as an earth leakage breaker, the handle 2 is disposed slightly closer to the power supply (upper side) than the center of the case in terms of ergonomics so as to be easily operated. In addition, the test button 3 which is used less frequently is usually arranged at a lower position (the OFF operation side of the handle) of the handle 2 in a close position. As a result, when the test button 3 is pressed with a fingertip, the mechanism trips, the handle 2 moves to the OFF operation side, and the fingertip may be strongly hit.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and has a width of less than one pole of the collective type, but does not cause the handle to hit the fingertip when operating the test button. It was made to provide.

[0007]

According to the present invention, there is provided an earth leakage circuit breaker having a width of not more than one pole of a contract type. The test button is provided. The power supply side terminal is a plug-in terminal,
A mechanism is configured under the handle, a leakage detection board is arranged below the test button on the power supply side of the mechanism, and an exhaust hole is formed in an outer shell extending from the mechanism to the load side. Is preferred.

In the earth leakage breaker of the present invention, the test button of the earth leakage detection circuit is provided on the ON operation side of the steering wheel by inverting the conventional layout. Therefore, even if the test button is pressed and the steering wheel is moved to the OFF operation side, There is no risk of hitting your fingertips. Further, if the leakage detection board is provided on the power supply side from the mechanism section and the exhaust hole is formed in an outer shell extending from the mechanism section to the load side, the leakage detection board may be exposed to gas. Absent.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. FIG. 1 is a plan view and a side view of an earth leakage breaker according to the present invention. The width of a case 10 is less than one pole of the agreement type, that is, 25 mm or less. The power supply side terminal 11 is a plug-in terminal, and the load side terminal 12 is a plug-in terminal. As shown in FIG. 1, the handle 13 is
The test button 14 is provided on the ON operation side of the handle 13.

FIG. 2 is a diagram showing the internal structure of the earth leakage breaker of the present invention, in which a fixed contact 15 is provided at a position near the load side terminal 12 and a mechanism portion having a movable contact 16 opposed thereto. 17 is arranged below the handle 13. On the other hand, near the power supply terminal 11, a ZCT 18
Is provided between the ZCT 18 and the mechanical unit 17. Test button 1
Reference numeral 4 is located immediately above the leakage detection board 19. The mechanism 1
An exhaust hole 20 is formed in the outer periphery of the case extending from 7 to the load side, so that the arc gas generated at the moment when the movable contact 16 is separated from the fixed contact 15 can be immediately exhausted.

The earth leakage circuit breaker of the present invention thus constructed is used inside a distribution board or the like as in the conventional product.
3, the handle 13 tripped when the test button 14 is pressed with a fingertip does not hit the fingertip. Further, since the arc gas generated at the time of opening the electrode is immediately discharged from the exhaust hole 20 on the load side, the leakage detecting substrate 19 is not exposed to the arc gas as in the related art. Further, since the leakage detection board 19 is located directly below the test button 14, if a test finger with which the test button 14 contacts the leakage detection board 19 is provided,
Wiring between them is not required.

In a conventional household power distribution board, breakers 21 having a width of 32 mm, which are called safety breakers, are arranged above and below the main bar 22 as shown in FIG. This safety breaker 21 can be connected in reverse, and the upper row of the main bar 22 is
Both bottom rows were turned on by raising the handle. As described above, all the test buttons are arranged on the OFF operation side of the handle.

On the other hand, the earth leakage breaker according to the second aspect of the invention is a plug-in type.
The lower row cannot be arranged in the same direction, and the plug-in terminal on the power supply side must always face the main bar 22. In other words, the lower row of the earth leakage breakers is turned on when the handle 13 is tilted up, while the upper row of the earth leakage breakers is turned on when the handle 13 is tilted down. Since the distribution board is usually installed on the wall near the ceiling, when the test button 14 is on the OFF operation side (load side) of the handle 13 as in the conventional structure, especially the upper row of the earth leakage breakers is provided. The test button 14 is hard to reach. However, in the present invention, since the test button 14 is on the ON operation side (power supply side) of the handle 13, there is an advantage that the test buttons 14 of the earth leakage breaker in the upper row can be easily reached. In addition, it is preferable that a display device (not shown) for the electric leakage be provided on the power supply side of the handle 13 similarly to the test button 14.

When the plug-in type is adopted, it is not preferable to discharge the arc gas from the power supply side because the three main pole bars 22 on the power supply side are close to each other. By discharging the gas from the exhaust hole 19 on the load side as in the above, the main bar 22 is not contaminated by the arc gas.

[0015]

As described above, the earth leakage breaker according to the first aspect of the present invention has a width equal to or less than one pole of the agreement type, but does not cause the handle to hit the fingertip when the test button is operated. The earth leakage breaker according to the second aspect of the present invention has the advantages that the earth leakage detection board is not exposed to the arc gas as in the prior art, and that the wiring between the earth leakage detection board and the test button is not required. is there.

[Brief description of the drawings]

FIG. 1 is a plan view (A) and a front view of an earth leakage breaker of the present invention.
(B).

FIG. 2 is an internal structure diagram of the earth leakage breaker of the present invention.

FIG. 3 is a diagram showing an example of an arrangement of a conventional safety breaker in a home distribution board.

FIG. 4 is a diagram showing an example of the arrangement of the earth leakage breaker of the present invention in a home distribution board.

FIG. 5 is a plan view of a conventional wide earth leakage breaker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power supply side terminal in prior art 2 Handle 3 Test button 4 Display button 5 Load side terminal 10 Case of earth leakage breaker of this invention 11 Power supply side terminal 12 Load side terminal 13 Handle 14 Test button 15 Fixed contact 16 Moving contact 17 Mechanism part 18 ZCT 19 Leak detection board 20 Exhaust hole 21 Safety breaker 22 Main bar

Claims (2)

[Claims] 1. An earth leakage breaker having a width equal to or less than one pole of a contract type, wherein a test button of an earth leakage detection circuit is provided on an ON operation side of a handle. 2. A power supply side terminal is a plug-in terminal, a mechanism section is formed below a handle, a leakage detection board is arranged below a test button on a power supply side of the mechanism section, and a power leakage detection board is provided from the mechanism section. The earth leakage breaker according to claim 1, wherein an exhaust hole is formed in an outer shell extending to a load side.