CN102290299A - Circuit breaker - Google Patents

Abstract

The present invention provides a circuit breaker, which can simply perform a test trip by simply changing and improving the circuit breaker without actually passing overcurrent or using an optional voltage tripping device. In a circuit breaker (such as a circuit protector) with a switch mechanism (4), a handle (5) and an electromagnetic tripping device (7) mounted on the housing (1), as an accessory part of the circuit breaker, there are A jig (9) for testing and tripping is inserted into the case (1) from the outside to press the above-mentioned armature (7a) to the trip position, and a jig insertion hole for the above-mentioned jig to be inserted is provided in the case (1) (1a), wherein the jig (9) for testing tripping is a crowbar with a tongue-shaped operating piece (9a) bent in a "く" shape at the front end, and in the shell (1), it is connected with the electromagnetic tripping The armature (7a) of the device (7) oppositely forms a slit-shaped jig insertion hole (1a).

Description

circuit breaker

technical field

The present invention relates to a small circuit breaker aimed at a circuit protector, and more specifically relates to a structure corresponding to a test trip function.

Background technique

As various devices such as FA equipment, OA equipment, and electronic equipment connected to circuits, and components (components) for protecting their control circuits against overcurrent, there are known housings equipped with fixed contacts and movable contacts. The above-mentioned circuit protector is composed of a main circuit contact composed of contacts, a switch mechanism, and an electromagnetic tripping device (for example, refer to Patent Document 1).

This circuit protector is a small, compact circuit breaker with a protection function that conforms to domestic and foreign standards, and is connected with upper-level wiring circuit breakers, leakage circuit breakers, etc. (these circuit breakers are equipped with test trips for sequence inspection) Agency) is different, the product in the prior art of standard specification does not have test trip function. Therefore, when the sequence check is performed on the user side, the status quo is to use an optional voltage tripping device, or to actually trip the circuit protector through overcurrent.

prior art literature

patent documents

Patent Document 1: Japanese Patent Application Laid-Open No. 9-326228

Contents of the invention

The problem to be solved by the invention

As mentioned above, when performing serial inspection on the user side, it is necessary to purchase an optional voltage tripping device and add it to the circuit protector, or to pass an overcurrent in the circuit protector, so as the user's needs, it is expected There are test means that can be easily implemented to replace this method in the prior art.

In view of the above circumstances, an object of the present invention is to provide a circuit breaker that can be used without actually passing an overcurrent or using an optional voltage release device by simply changing a circuit breaker targeted at a circuit protector or the like. case, simply perform a test trip of the modified circuit breaker.

In order to achieve the above object, according to the present invention, a circuit breaker is provided, which is equipped with a contact, a switch mechanism, a handle and an electromagnetic tripping device in the housing,

As an accessory part of the above-mentioned circuit breaker, there is provided a jig for testing tripping that is inserted into the case from the outside to perform a press-in operation for pressing the armature of the electromagnetic tripping device to the trip position. The jig insertion hole for inserting into the housing (first aspect) is specifically configured as follows.

(1) The above-mentioned jig for testing and tripping is a crowbar with a tongue-shaped operating piece formed by bending at the front end, and the jig insertion hole of the housing for inserting the operating piece of the crowbar is in line with the above-mentioned electromagnetic tripping device. The armature has a slit-shaped hole opened on its side oppositely (the second aspect).

(2) The above-mentioned housing is a two-in-one structure formed by butting the shell and the cover, and slit-shaped grooves are formed oppositely in the form of cutouts on the peripheral parts of the above-mentioned shell and the above-mentioned cover, as jig insertion holes ( third aspect).

According to the above structure, when the user performs a serial inspection in the system at the place of use, the jig (pry plate) for testing and tripping, which is an accessory part of the circuit breaker, is inserted into the jig insertion hole opened on the casing, and prying is performed manually. operate. By this operation, the circuit breaker can be tripped only by a simple push-in operation in which the operating piece of the crowbar presses the armature of the electromagnetic tripping device to the trip position.

Therefore, there is no need to actually pass overcurrent like conventional products, or use an optional voltage release device, etc., only by inserting a plate-shaped test tripping jig as an accessory part from the outside and setting it in the circuit. Sequence inspection can be easily performed by prying the jig insertion hole on the case of the circuit breaker. Moreover, the cost of the jig for testing and tripping with a simple shape can also be reduced. In addition, it is not necessary to make a large change to the main body of the circuit breaker of the existing product. Slots can be easily matched.

Description of drawings

FIG. 1 is an internal structural diagram of a circuit breaker in which a test jig for tripping is inserted into a case of the circuit breaker according to an embodiment of the present invention, taking a circuit protector as an example.

2 is a supplementary explanatory diagram of FIG. 1 , (a) is an external perspective view of a state in which a jig for a trip test is inserted into a case, and (b) is an external view of the jig for a trip test.

3 is an external view of the circuit breaker showing a state in which the trip test jig is pulled out from FIG. 2 , (a) is a perspective view viewed from the jig insertion hole side, and (b) is an end view.

Fig. 4 is an exploded view of the housing corresponding to Fig. 3, (a) is a perspective view, and (b) is an end view.

Symbol Description

1 shell

1a Fixture insertion hole

4 switch mechanism

5 handles

7 Electromagnetic release device

7a armature

9 Fixtures for testing tripping

9a Operation piece

Detailed ways

Hereinafter, taking the above-mentioned circuit protector as an example, the embodiments of the present invention will be described based on the embodiments shown in FIGS. 1 to 4 .

In each figure, 1 is the case of the circuit breaker (circuit protector), 1a is a jig insertion hole for inserting a test tripping jig described later into the case from the outside, and 2 and 3 are the power supply side and the load side. The main circuit terminal, 4 is the switching mechanism of the main circuit contact composed of fixed contacts and movable contacts, 5 is the handle, 6 is the arc suppression device, 7 is the armature 7a which is attracted by the armature of the fixed iron core 8 is a latch mechanism connecting the armature 7a of the electromagnetic tripping device 7 and the switch mechanism 4, and 9 is a newly added test tripping device as an accessory part of the circuit breaker of the present invention. The jig, corresponding to the jig, is formed in the above-mentioned jig insertion hole 1a of the housing 1, corresponding to the assembly position of the armature 7a of the electromagnetic tripping device 7, and opens on the side wall end surface of the housing 1. In addition, the above-mentioned casing 1 is a two-in-one structure in which the casing 10 and the cover 11 are butt-jointed as shown in FIG. 4 . In addition, the function and operation|movement of this circuit breaker (circuit protector) are already described in detail in the said patent document 1, and the description is abbreviate|omitted here.

In addition, the jig 9 (accessory part of the circuit breaker) for the above-mentioned test and tripping, as shown in FIG. The skid plate (such as resin) is made. On the other hand, the jig insertion hole 1a of the casing 1 into which the operating piece portion 9a of the crowbar 9 is inserted is a slit-shaped hole opened opposite to the side of the armature 7a of the electromagnetic tripping device 7, As shown in FIG. 4 , the peripheral positions of the shell 10 and the cover 11 are aligned, and slit-shaped grooves 10a, 11a are formed oppositely in the form of cutouts, and the combination of the shell 1 obtained by docking the shell 10 and the cover 11 In this state, a slit-shaped jig insertion hole 1a is formed.

Next, the test operation at the time of performing a sequence check using the jig|tool 9 for test trips mentioned above is demonstrated. That is, as shown in FIG. 2( a), insert the operating piece portion 9a of the jig 9 for the test trip from the arrow A direction into the slit-shaped jig insertion hole 1a opened on the side wall end face of the housing 1, and When lifting in direction B, the operating piece 9a is pried counterclockwise with the edge of the jig insertion hole 1a as a fulcrum, pressing the armature 7a of the electromagnetic tripping device 7 shown in FIG. 1 against the armature of the fixed iron core. The operation of the armature 7a is the same as the operation of the armature 7a being attracted by the armature when the electromagnetic tripping device 7 detects an overcurrent. Through this test operation, the switching mechanism 4 performs a tripping operation through the latch mechanism 8 (see FIG. 1 ). , the main circuit contact becomes an open circuit state. In addition, when resetting the circuit breaker, it is only necessary to pull out the test jig 9 from the case 1, temporarily move the handle 5 to the reset position and then switch to the start (ON) position, thereby breaking the circuit to return to the conduction state.

As mentioned above, when the user performs a test trip on the circuit breaker at the place of use, it is not necessary to actually pass the overcurrent in the circuit breaker, and it is not necessary to prepare an optional voltage tripping device, and only through the crowbar type test trip The serial inspection can be easily performed by inserting the jig 9 into the jig insertion hole 1a of the case 1 and performing a prying operation.

Moreover, the above-mentioned jig 9 for testing and tripping adopts a simple plate-shaped structure, and its cost is also low. In addition, it is not necessary to make substantial changes to the main body of the circuit breaker. The forming of the outer casing 1 is based on the production process of the prior art products. It can be easily responded by only adding a small amount of changes to the mold.

Claims (3)

1. circuit-breaker, it is mounted with contact, switching mechanism, lever and electromagnetic type trip gear at shell, and described circuit-breaker is characterised in that:

Appurtenances as circuit-breaker, be provided with and insert shell from the outside and use tool, be provided with the tool patchhole of using with tool insertion shell for described test tripping operation so that carry out the test tripping operation that armature with the electromagnetic type trip gear is pressed into the push operation of trip position.

2. circuit-breaker as claimed in claim 1 is characterized in that:

Test tripping operation is the skid plate that is bent to form tongue-shaped operating sheet portion at front end with tool, is hole in the slit-shaped of the side opening of the armature of described electromagnetic type trip gear for the tool patchhole of the shell of the operating sheet portion insertion of this skid plate.

3. circuit-breaker as claimed in claim 1 or 2 is characterized in that:

Shell is the two-in-one structure that is formed by shell and lid butt joint, relatively forms the groove of slit-shaped at the circumference of described shell and described lid in the mode of otch, as the tool patchhole.

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