JPH07141976A - Circuit breaker - Google Patents

Abstract

PURPOSE:To enhance the easiness of assembling works in installing a switching mechanism part, a current feeding part of adjacent phase, and attachment device/components, to enhance the reliance upon the motions of the adjacent phase current feeding part and attachment device/components, and to prevent the switching mechanism part, current feeding part, and further a tripping device from being adverse influenced by arcs generated when the circuitry is broken. CONSTITUTION:A tripping device 18, switching mechanism part 19, current feeding part 12, and arc extinguishing device part 17 are installed in a case 11, and the switching mechanism part 19 is mounted on an intermediate base 20 consisting at least in the facial course of an insulative material to be installed within the case 11, and together with this intermediate base 20, the switching mechanism part 19 is installed in the case 11. The intermediate base 20 has a bulkhead 35 for the space of adjacent phase to the space 38 of a phase having the switching mechanism part 19 in the case 11, and another bulkhead 34 for the arc extinguishing device part 17 and also a bulkhead 33 for the current feeding part 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker in which a trip device, an opening / closing mechanism part, an energizing part, and an arc extinguishing device part are incorporated in a case.

[0002]

2. Description of the Related Art Conventionally, in a circuit breaker, as shown in FIG.
As shown in, inside the case 1 composed of the case main body 1a and the cover portion 1b, the trip device 2, the opening / closing mechanism portion 3,
The one provided with the energizing part 4 and the arc extinguishing device part 5 is provided. Among them, the trip device 2 detects when an overcurrent flows in the main circuit and activates the opening / closing mechanism part 3. The activated opening / closing mechanism part 3 causes the movable contact 6 of the energizing part 4 to move. The circuit is cut off by separating from the fixed contact 7, and the arc extinguishing unit 5 erases the arc generated at that time.

The opening / closing mechanism section 3 is mounted inside the case 1 by attaching each of its parts to the case body 1a, and the case body 1a and the cover section 1 of the case 1 are also incorporated.
In b, a partition wall (not shown) is provided to separate the space of the phase having the opening / closing mechanism section 3 and the space of the other phase adjacent thereto.

[0004]

However, as described above, each of the parts of the opening / closing mechanism section 3 has the case main body 1a.
It was troublesome to attach and assemble to the, and the assemblability was poor. Further, the switching mechanism section 3 is a case 1 of one circuit breaker.
Since the opening / closing mechanism portion 3 is directly attached to the case main body 1a, the opening / closing mechanism portion 3 is located in the space of the other phase adjacent to the opening / closing mechanism portion 3, There is also a possibility that the space of the adjacent phase is narrowed, so that the operation of the current-carrying part of the adjacent phase and other accessory device parts may be impaired. Furthermore, in this case, the open / close mechanism section 3 also deteriorates the assembling property of the current-carrying portion of the next phase and other accessory device parts.

Although the case main body 1a and the cover portion 1b of the case 1 are provided with partition walls for separating the space of the phase having the opening / closing mechanism portion 3 and the space of the other phase adjacent thereto, The mechanical unit 3 and the arc extinguishing unit unit 5 or the energizing unit 4 are not spatially independent of each other and are located in almost one continuous space. Therefore, the influence of the arc generated when the circuit is cut off, especially the molten metal of each component contained in the arc gas, is transferred from the arc extinguishing device section 5 to the opening / closing mechanism section 3 and the energizing section 4 and to the trip device 2 or to the energizing section 4. There is a problem in that they adhere to the opening / closing mechanism section 3 and the trip device 2 and cause malfunction of the opening / closing mechanism section 3, the energizing section 4 and the trip device 2.

The present invention has been made in view of the above circumstances. Therefore, an object of the present invention is to improve the assembling property of the opening / closing mechanism part, the current-carrying part of the phase adjacent thereto, and the accessory device parts, and its neighbor. A circuit breaker capable of improving the reliability of the operation of the current-carrying part of the phase 1 and the accessory device parts, and
Provided is a circuit breaker capable of easily attaching and detaching accessory components of the next phase, and further, the adverse effect of the arc generated at the time of circuit interruption does not affect the switching mechanism section, the current-carrying section and the tripping device. To provide a circuit breaker that can keep the operation of the device good.

[0007]

In order to achieve the above object, in the circuit breaker of the present invention, it is arranged in a case together with a tripping device, an opening / closing mechanism part, an energizing part, and an arc extinguishing device part. , An intermediate base at least the surface of which is made of an insulating material, and the opening / closing mechanism is attached to the intermediate base,
It is characterized in that the opening and closing mechanism part is incorporated in the case together with the intermediate base.

In this case, the intermediate base preferably has a partition wall for the space of the phase next to the space of the phase having the opening / closing mechanism in the case. Further, the case has an opening at the upper part of the space of the phase next to the phase having the opening / closing mechanism part, through which an accessory device component of the next phase can be put in and taken out, and the opening and closing for opening and closing the opening part. It is good to have a possible auxiliary cover.

On the other hand, the intermediate base preferably has a partition wall for the arc extinguishing device section. Further, the intermediate base may have a partition wall for the current-carrying portion. Further, it is more preferable that the intermediate base has a partition wall for the arc extinguishing device section and also has a partition wall for the energizing section.

[0010]

According to the above means, the parts of the opening / closing mechanism may be attached to the intermediate base and incorporated in the case, and it is not necessary to attach each of them to the case. Further, the space occupied by the opening / closing mechanism in the case is the range attached to the intermediate base, and the space of the other phase adjacent thereto is not occupied.

In this case, particularly when the intermediate base has a partition wall for the space of the adjacent phase, the separation of the space of the phase having the opening / closing mechanism and the space of the adjacent phase can be made clearer.

Further, the case has an opening portion above and below the space of the phase next to the phase having the opening / closing mechanism, through which an accessory device component of the adjacent phase can be put in and taken out, and the opening thereof. With a detachable auxiliary cover that opens and closes the parts, attachment and removal of the accessory device component of the next phase can be performed by simply removing the auxiliary cover without removing the cover part of the case.

On the other hand, in the case where the intermediate base has a partition wall for the arc extinguishing device section, the effect of the arc generated when the circuit is cut off from the arc extinguishing apparatus section affects the opening / closing mechanism section, the energizing section and the trip device. Can be prevented by.

When the intermediate base has a partition wall for the current-carrying portion, the partition wall can prevent the influence of the arc generated when the circuit is cut off from the current-carrying portion from affecting the switching mechanism and the trip device. .

Further, in the case where the intermediate base has a partition wall for the arc extinguishing device section and a partition wall for the energizing section, the influence of the arc extinguishing apparatus section of the arc generated at the time of circuit interruption from the switching mechanism section, the energizing section and Spanning the trip device,
In addition, it is possible to more reliably prevent the influence of the arc from the current-carrying part from affecting the opening / closing mechanism part and the trip device by the partition walls.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, in FIG. 1, reference numeral 11 denotes a case, and the case main body portion 11 a and the cover portion 1
It consists of 1b. A current-carrying portion 12 is incorporated in the case main body portion 11a. The current-carrying portion 12 can be rotated by a fixed contact 13 having a substantially U-shape, a movable arm 14 and a movable arm 14 by a pin 15. Supported and contact 16a
Is composed of a movable contactor 16 which comes into contact with and separates from a contact 13a of the fixed contactor 13. Further, an arc extinguishing device portion 17 is incorporated in the case main body portion 11a on the side of the contacts 13a and 16a, and a trip device 18 is incorporated on the opposite side.

The current-carrying portion 1 in the case main body portion 11a
An opening / closing mechanism portion 19 is incorporated in the upper part of the upper portion 2 together with the intermediate base 20. The opening / closing mechanism unit 19 includes an operation handle 21.
And has a handle receiver 2 of this operation handle 21.
2 is rotatably attached to a frame 24 by a shaft 23. As shown in FIG. 2, there are a pair of left and right frames 24, and a catch 25 is rotatably attached by a pin 26 between them. Further, the catches 25 are provided with the first links 27 on both sides thereof and are rotatably connected by the pins 28, respectively, and the second links 29 are rotatably connected by the pins 30 to the first links 27, respectively. , And each tip end thereof is also rotatably connected to the movable contactor 16 by a pin 25. Further, a tension coil spring 32 functioning as a toggle spring is stretched between the pin 28 and the handle receiver 22.

On the other hand, the intermediate base 20 is made of an insulating material, and as shown in FIG. 3, a horizontal first partition 33.
And a second partition wall 34 extending obliquely upward at one end thereof, and third partition walls 35 extending vertically on the left and right sides, respectively. Then,
The opening / closing mechanism unit 19 positions most of the handle receiver 22, the catch 25, the first link 27, and the tension coil spring 32 above the first partition 33, and leaves the second
Link 29, first link 27 and tension coil spring 3
The second partition 33 and the second partition 34 are passed through holes 36 formed in the first partition 33 and the second partition 34 so as to be positioned below the first partition 33.
In this state, the opening / closing mechanism portion 19 is incorporated into the case main body portion 11a together with the intermediate base 20 as described above.

Incidentally, in the above-mentioned assembled state, the catch 25
Has the tip 25a locked to the catch receiver 37 of the trip device 18. In addition, the first partition 33 of the intermediate base 20
Faces the lower energizing portion 12, the second partition wall 34 faces the arc extinguishing device portion 17, and the third partition wall 3
As shown in FIG. 2, the reference numeral 5 faces the other phase spaces 39 and 40 located on the left and right sides of the phase space 38 in which the opening / closing mechanism section 19 exists in the case main body portion 11a.
Further, as shown in FIG. 4, there is no opening / closing mechanism in the spaces 39 and 40 of the phases on both sides of the phase, and a current-carrying part 41 similar to the current-carrying part 12 and an arc-extinguishing device similar to the arc-extinguishing device part 17. Part 4
2, and only the trip device 18 is arranged. In addition, with respect to the spaces 39 and 40 of the two adjacent phases, auxiliary device parts such as an auxiliary switch (not shown) are put in and taken out from the cover part 11b of the case 11. Aperture 43 that can be
And a detachable auxiliary cover 44 that opens and closes the opening 43 is provided.

According to the above construction, each part of the opening / closing mechanism portion 19 may be attached to the intermediate base 20 and incorporated into the case main body portion 11a, and each of them can be incorporated into the case main body portion 11a.
Since it is not necessary to attach it to a, the trouble can be eliminated and the assemblability can be improved. Further, the space occupied by the opening / closing mechanism portion 19 in the case 11 is the range attached to the intermediate base 20, and the spaces 39, 40 of the other phases adjacent thereto are not occupied, so that the space 3 of the adjacent phase 3
9 and 40 can be sufficiently secured, the movement of the current-carrying part 41 and other accessory device parts can be improved, the operational reliability of them can be improved, and their assembling property can be improved. Can be improved.

In this case, in particular, in the case of the above-mentioned structure, the intermediate base 20 has the third partition wall 35 for the spaces 39 and 40 of the adjacent phases, whereby the phase of the phase having the opening / closing mechanism section 19 is formed. Since the space 38 and the spaces 39, 40 of the adjacent phases can be more clearly separated, the reliability of the operation of the current-carrying part 41 of the adjacent phase and other accessory device parts, and the improvement of their assembling are also improved. It can be achieved more reliably.

Further, the cover portion 11b of the case 11 is formed with an opening 43 through which the accessory device parts of the adjacent phase can be taken in and out of the spaces 39 and 40 of the adjacent phase, and the opening part thereof. By providing the detachable auxiliary cover 44 for opening / closing 43, the attachment / detachment of the accessory device parts can be easily performed only by removing the auxiliary cover 44 without removing the cover portion 11b of the case 11. You can

On the other hand, when an overcurrent flows in the main circuit from the ON state of FIG. 1, the trip device 18 detects it and rotates the catch receiver 37 to lock the tip portion 25a of the catch 25. Is released, the catch 25 is rotated by the biasing force of the tension coil spring 32 so as to be separated from the catch receiver 37, and the first and second links 2 are released.
7, 29 are bent in a V shape, whereby the movable contact 16 is rotated upward together with the movable arm 14 to separate the contact 16a from the contact 13a of the fixed contact 13,
Cut off the circuit. At this time, the arc extinguishing device section 42 erases the arc that is generated.
The second partition 34 for the arc extinguishing device section 42 is provided in the intermediate base 20 with respect to the arc generated in 1. Therefore, the influence of the generated arc from the arc extinguishing device section 42, in particular of each part included in the arc gas. It is possible to prevent the molten metal from reaching the opening / closing mechanism section 19, the energization section 12 and the tripping device 18 by the second partition wall 34, and it is possible to keep their operations in good condition.

Further, the intermediate base 20 is also provided with a first partition 33 for the current-carrying portion 12, so that the influence of the arc generated at the time of the above-mentioned circuit interruption from the current-carrying portion 12 and the opening / closing mechanism portion 19 or. Since it is possible to prevent the trip device 18 from reaching, the opening / closing mechanism portion 19 and the trip device 18 are prevented.
The operation of can be better maintained. The intermediate base 20 may not be entirely made of an insulating material, but may be made of an insulating material only on the surface.

[0025]

The circuit breaker of the present invention is as described above, and has the following effects. Firstly, a trip device, an opening / closing mechanism portion operated by the trip device, and a movable contact that is separated from a fixed contact by the opening / closing mechanism portion in a case, and a fixed contact thereof. An arc extinguishing device for extinguishing an arc generated when a movable contact is separated from a child is incorporated, which comprises an intermediate base at least the surface of which is made of an insulating material and is disposed in the case. By mounting the opening / closing mechanism section on the base and incorporating the opening / closing mechanism section together with the intermediate base in the case, it is possible to improve the assemblability of the opening / closing mechanism section, the current-carrying part of the phase adjacent to the opening / closing mechanism section, and the accessory device parts. The improvement can be achieved, and the reliability of the operation of the current-carrying part and the accessory device of the adjacent phase can be improved.

Secondly, since the intermediate base has a partition wall for a space of a phase adjacent to a space of a phase having the opening / closing mechanism, the opening / closing mechanism, a current-carrying portion of the phase adjacent thereto, and an accessory. It is possible to more reliably achieve the improvement of the assembling property of the device component, and the improvement of the reliability of the operation of the current-carrying part and the accessory device component of the phase adjacent thereto.

Thirdly, the above-mentioned case has an opening above the space of the phase next to the phase having the opening / closing mechanism, and an opening through which an accessory device part of the phase next to the phase can be put in and taken out. By having the detachable auxiliary cover that opens and closes the opening, attachment and detachment of the accessory device component of the adjacent phase can be easily performed.

Fourthly, since the intermediate base is provided with a partition wall for the arc extinguishing device part, adverse effects of the arc extinguishing device part generated at the time of circuit interruption from the arc extinguishing device part, the opening / closing mechanism part, the energizing part and the trip device. Therefore, it is possible to keep their operation in good condition.

Fifth, since the intermediate base has the partition wall for the current-carrying portion, the adverse effect of the arc generated at the time of circuit interruption from the current-carrying portion is not exerted on the switching mechanism portion and the tripping device, and those The operation can be kept good.

Sixth, since the intermediate base has a partition wall for the arc extinguishing device section and a partition wall for the energizing section, the opening / closing mechanism prevents the arc generated when the circuit is cut off from the arc extinguishing apparatus section. It is possible to further improve the operation of the arc, the current carrying part and the trip device, and to prevent the influence of the current carrying part of the arc from affecting the switching mechanism part and the trip device.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view of a phase having an opening / closing mechanism according to an embodiment of the present invention.

FIG. 2 is a partial plan view of an opening / closing mechanism section and an intermediate base.

FIG. 3 is a vertical side view of a case and an intermediate base.

FIG. 4 is a vertical sectional side view of a phase having no opening / closing mechanism section.

FIG. 5 is a view corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

11 is a case, 12 is a current-carrying part, 16 is a movable contactor, 17
Is an arc extinguishing device part, 18 is a trip device, 19 is an opening / closing mechanism part,
Reference numeral 20 is an intermediate base, 33 is a first partition wall (a partition wall for a current-carrying portion), 34 is a second partition wall (a partition wall for an arc extinguishing device section), 35 is a third partition wall (a partition wall for a space of an adjacent phase), 38 Is a space of a phase having an opening / closing mechanism, 39,
Reference numeral 40 is a space for the adjacent phase, 43 is an opening, and 44 is an auxiliary cover.

Claims (6)

[Claims] 1. A current-carrying part having a tripping device, an opening / closing mechanism part operated by the tripping device, and a movable contactor separated from a fixed contactor by the opening / closing mechanism part in a case, and fixing the same. An arc extinguishing device for extinguishing an arc generated when the movable contact is separated from the contact is incorporated, the intermediate base having at least a surface made of an insulating material disposed in the case, A circuit breaker in which the opening / closing mechanism is attached to an intermediate base, and the opening / closing mechanism is incorporated in the case together with the intermediate base. 2. The circuit breaker according to claim 1, wherein the intermediate base has a partition wall for a space of a phase adjacent to a space of a phase having the opening / closing mechanism in the case. 3. The case has an opening through which an accessory device component of the next phase can be taken in and out, in the upper part of the space of the phase next to the phase having the opening / closing mechanism part, and the opening part. The circuit breaker according to claim 1, further comprising a removable auxiliary cover that opens and closes. 4. The circuit breaker according to claim 1, wherein the intermediate base has a partition wall for the arc extinguishing device section. 5. The circuit breaker according to claim 1, wherein the intermediate base has a partition wall for the current-carrying portion. 6. The circuit breaker according to claim 1, wherein the intermediate base has a partition wall for the arc extinguishing device section and a partition wall for the energizing section.