JPS58131625A - Multipolar circuit breaker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention The present invention has a multi-pole contact interposed between a power source and a load, and when an abnormality is detected in the load, all of the multi-pole contacts are opened to connect the power source to the load. This invention relates to a nine-pole type circuit disconnector that can quickly cut off the power supply.

Conventional multi-pole circuit breakers have an independent contact breaking mechanism for each pole, and the latch plates in each contact breaking mechanism arranged in parallel with each other, in other words, rotate by input from a bimetal, etc., to close the contacts. The latch plates that perform the breaking operation are connected by interlocking rods so that when the latch plate of one pole rotates, the latch plate of the other pole also rotates, and the contact breaking operation of each pole is performed simultaneously. This is what I used to do. However, in such conventional examples, it is not possible to share the structure of the latch plate and the size of the casing with single-pole circuit breakers, and therefore it is not possible to share the same molds, production plates, etc., which reduces efficiency. There was a problem in that it was difficult to carry out production.

The present invention has been made to solve these problems of the conventional example, and has a plurality of negative pole type circuit breakers installed in parallel.
- It is an object of the present invention to provide a multi-polar circuit breaker that allows the contact breaking mechanisms of each circuit breaker to be linked to each other with a simple configuration and improves productivity by sharing parts. It is something to do.

The configuration of the present invention will be described below with reference to illustrated embodiments. 1st
The figure shows the appearance of a single-pole type circuit breaker, which is the basis of the present invention. ) is provided protrudingly. Figure 2 shows the state where the fixed odor 3) has been removed and one casing j (21) has been removed from the other casing j (22), and as shown in the figure, both casings (21) and (22) are In between is a pair of external connection terminals (
51) It houses various parts such as (52), a movable contactor (6), and an arc extinguisher (7).

Figures 3 and 4 are books showing individual parts required for the operation of the circuit breaker, and Figures 5 to 8 show the cross-sectional structure of the circuit breaker. In each of the above figures, (8) is a movable contact attached to the tip of the movable contactor (6), which contacts and opens the fixed contact 1101 attached to one terminal plate (91), thereby causing the main circuit. K so that it can be opened and closed
It's happening. A tightening screw Owl is attached to each terminal board (91) (9g) via a washer (+11) and a slurry seat washer (+121), thereby forming a pair of external connection terminals (51) (52). The other end of the braided wire H, whose one end is welded to the free end side of the bimetal 06), is attached to the protruding piece 041 protruding from the terminal plate (9ε). 6) is welded. The movable contactor (6) is connected to the movable arm (lη), and the movable arm (171) has a striking portion (19a) bent into a substantially U-shape and fits into the concave groove (4a) in the hashidle (4).
). In addition, both ends (+ on 19) of the rotating shaft (191) are U which serve as the pivot points of the movable arm αη.
It is fitted into the U-shaped groove (3) and also fitted into the pivot hole (211) of the movable frame and the U-shaped groove (4). This is a tension spring for biasing the OFF position and the OFF position.One end of this tension spring (C) is engaged with the center part (1!Ja) of the rotation axis OI, and the other end is engaged with the center part (1!Ja) of the rotation axis OI. Axial hole T24 of movable arm 0η
Both ends of the IK are engaged with a supported busy. Therefore, as shown in FIGS. 5 and 7, the handle (4) is biased toward the OFF position or the OFF position at the point where the tension spring @ crosses the rotation center P of the rotation axis (II). Furthermore, the movable arm (Iη, the movable frame H, and the rotating shaft) can be integrated by the tensile force of the tension spring 181. A stepped portion (to) is formed, and the concave groove (4b) of the hashidle (4) can be engaged with the protruding portion as shown in Fig. 3. During the assembly process of the circuit breaker, Hasidor (4) points to arrow A.
It is K-shaped to prevent it from flying out in the direction shown. The next K (rotation) is engaged with a compression coil type link for forcibly opening the movable contact (6) during a tripping operation. This Suzurishi J
C2'i4 is stored in the storage space of both casings j (2t) (2g), and the trap is set so that the rear end (271) of Suzulink Co., Ltd. comes into contact with the bottom surface (301L). It is something that The arc preservation plate is a movable contact (6)
The movable contact (8) is the fixed contact (10!) of the terminal board (91).
This is to prevent the splicer from being eroded and damaged by the arc generated when it is separated from the main body, and is composed of a front protection plate (28a) and a side protection plate (z8b). Further, the front protection plate (28a) is slightly sloped to improve the contact with the insert for inserting the tip (27a) of the slit seal. (2) Magnetism I
This is a yoke plate for short-circuit current detection formed by g#-, and a side projecting piece protrudes from this yoke plate.
can be fixed by means of retaining holes formed in a pair of casings (21) and (22), respectively. The center piece of the yoke plate is tightened and fixed to the terminal plate (92), and side pieces forming magnetic coupling paths extend vertically from both sides of the center piece. There is. @η is a latch plate, and both ends of the shaft support inserted through the shaft support hole T21jK are supported by the engagement holes of both casings (21) and (22), making the latch plate rotatable. . η of this latch plate is formed of a magnetic material, and when an excessive current flows through the bimetal urA, the magnetic flux generated around the bimetal 06) flows toward the center piece (to) and one side of the yoke plate (3). The button is designed to attract the magnetic attraction piece (41) of η of the latch plate to the side piece □□□.

Furthermore, a contact piece (4) is formed at the upper end of the latch plate C71, and it comes into contact with the free end side of the bi8310 beat. A locking step ■ is formed at the tip of 03, and the ti
It comes into contact with the locking portion 14 (to) of the l-moving frame ([). +46) is the latch root blade, the contact piece i42 is tl
It is a torsion spring that presses against the free end 11 of Imetal (11), and as shown in Figs. When the handle (4) is in the OFF position, K contacts the hashidle (4), and when it is in the OFF position, the K touches the handle (21).
(The two K contact each other, and the force applied to the latch plate 071 is changed depending on the state of the hash door (4). On the other hand, when the torsion gene (■) is fitted into the pivot boss (471) of the cage (21), The other cage-J5 (2,
) The receiver is stopped by the pivot post (47m) K. Both cages (2t) (zt)K also have shaft support holes (4 barrels and large holes for inserting fixtures (3)) for supporting both ends (19b) of the rotating shaft (I), and Exhaust hole (50
m) (50b), etc. are provided. Plus +71
It is a Fi arc extinguishing device, and is formed by holding an arc extinguishing plate part η made of a plurality of magnetic materials at appropriate intervals with an II M f6'A K made of an insulating material, and is movable. The arc generated when the contact (8) and the fixed contact III are separated can be extinguished as quickly as possible. Each arc extinguishing stone υ is provided with a notch (51 m) through which the movable contactor (6) can pass. This notch (51m)
A substantially V-shaped cut (51b) is formed at the lower end, and the gas accumulated around the contact is removed via this cut (51b) to the gas accumulation part formed behind the fixed contact. By discharging the water, the shutoff performance can be improved. Also, there is a partition wall between the arc extinguishing chamber that stores the arc extinguishing device (7) and the cutoff mechanism section 16 that stores the sling/jig and the movable frame (l11, etc.). is formed to prevent the arc from the arc extinguishing chamber from entering the cutoff mechanism (5υ).

The operation of such a single-pole type circuit breaker is shown in Figures 5 to 8.
This will be explained using figures. First, Figure 5 shows the state when the circuit breaker is off, and in this state, the movable contact (8
) and the fixed contact (lO) are separated. At this time, the movable contact +61 is urged by the tensile force of the tension spring (C), and is separated to a position where it comes into contact with the opening edge of the bottom opening (18a) of the movable frame (11). 4) is similarly biased by the tensile force of the tension spring □□□, and is stopped at a position where the groove (4b) engages with the protrusion example. Also, one end of the torsion spring decoy is Handle (4
), the other end of the torsion spring is held in place by the abutment piece 142 of the latch plate 371. Also, the spring resistor for trip operation is compressed and remains in the storage space. Figure 6 shows a sectional view taken along the line X-X in Figure 5.
It can be clearly seen that the center portion (19a) of the movable arm IF+) and the movable arm IF+) are pulled together by the tension spring. Next, Figure 7 shows the state when the circuit breaker is turned on. In this state, the movable contact (6)
is biased by the tensile force of the tension spring, and the movable contact (8)
is stopped at the position where the fixed contact (IQK is pressed). Also, the hashidle (4) is also urged by the tensile force of the tension spring, and the operating part of the handle (4) is pressed against the case (21) (221K). The movable contact (8) and hashidor (
The direction in which the operating section 4) is biased is reversed at the point where the tension spring (c) crosses the rotation center P of the rotation axis (Im).

Therefore, when the circuit breaker is on, one end of the torsion spring decoy is no longer pressed against the outer peripheral surface of the handle (4), as shown in FIG. The pressure force applied to the latch plate 1 is weaker than in state 11 when it is off, so that the desired force is applied to the abutment piece. Therefore, if the bimetal O@ deforms due to an overcurrent and presses the contact piece, or if the yoke plate G is magnetized by the short-circuit current flowing through the bimetal plate and attracts υ to the magnetically attracting piece. The latch plate @ is rotated around the pivot support pin (to), and from this K the locking step part and the locking part t are rotated.
The engagement with aS is disengaged, the spring Ij (goods) extends,
The end of the movable frame is configured to rotate about the rotation center P of the rotation axis -. FIG. 8 shows a turtle showing a state in which such a tripping operation is performed. As shown in the figure, the movable frame is pressed by the splinter vIK and rotates, so the movable contact (@)I! It is pushed by the opening edge of the bottom opening (18m) of the movable frame and is forcibly driven in the contact opening direction. When the movable contactor (61) is opened by a predetermined distance, it is further driven in the contact opening direction by the tensile force of the tension spring, and finally the movable arm fist η comes into contact with the pivot bracket @. The movable arm 611η stops at a position where the hash doll (4) groove (4b) is engaged with the protrusion of the movable frame I. At this time, the movable frame Q1 is tilted. Therefore, the operation part of the hash doll (4) stops approximately at the center between the OP position and the OFF position, indicating that a trip operation has been performed. As shown, return the handle (4) to the OFF position and remove the locking step (44).
and the locking part (c) are not restored.
) cannot be stopped at the oscillating position. As is clear from comparing Figures 5 and 7, the opening width of the opening (18 m) of 1 movable frame (Im) is longer than the opening/closing stroke of the movable contact (6). Therefore, when there is no trifling operation such as during manual opening/closing operation, the movable contact (6) is not affected by contact breaking mechanisms such as the splice, movable frame structure, and latch plate (b). In addition, in this embodiment, one end of the torsion spring arm was set apart from the hashidle (4+), so when the latch 1g is turned off, the abutment piece (
4 is strongly pressed, it is possible to reduce the possibility that the locking step part (4) and the locking part - will come out of engagement due to vibrations when manually opening and closing the hash door (4).

By the way, when the movable contact (8) and the fixed contact are opened and the main circuit is dialysed, the movable contact (8) and the fixed contact are
An arc occurs between the
7) The arc is extinguished as quickly as possible by the nine or more arc extinguishing plates provided in the interior. Arc extinguishing plate H
As mentioned above, a KIIV-shaped kerf (51b) is formed at the lower end of the notch (51m).
) is arranged 4 points below the terminal *(OX) as shown in FIG. Therefore, the gas generated around the contact when the circuit is disconnected passes through this groove (51b) to the terminal [C*1'
) is designed to be quickly discharged to the rear gas retention area. Further, since the gas discharged into this gas retention section is discharged from the exhaust hole (50 m), the amount of arc ejected to the outside can be reduced. In addition to this exhaust hole (Set),
An exhaust hole (SOb) is also provided on the opposite side of the arc extinguisher (1), which releases gas in both directions, thereby increasing the efficiency of gas discharge from the arc extinguisher (7). It is.

Next, Figure 9 is a cross-sectional view showing the adjustment mechanism for the thermal response characteristics of the bimetallic circuit breaker of the above-mentioned single-pole type circuit breaker. A push-up jig φη and a push-down jig - are inserted into the circuit value disconnector main body +11 so that the thermal response characteristics of the bimetal 0190 can be changed from the outside. In FIG. 9, - is an adjustment piece formed at the lower end of the terminal plate (92), which connects the abbreviated opening - and the push-up retaining part (capital and push-down engagement part 12). The adjustment piece has a protruding piece 04) protruding from the end thereof, and the protruding piece C14) has a retaining hole (15a) made of K bimetal θ pine, so the adjustment piece is relatively Bimetal Q is easily deformed, and when the push-up jig 6η is engaged with the push-up retaining portion 11) and the adjustment piece is pushed upward, the area around the abbreviated opening of the adjustment piece is deformed, and the bimetal Q The free end of (to) is displaced in the direction shown by arrow qK. Also, the push-down jig-
When the adjustment piece is pushed down and engaged with the retaining part 12 and the adjustment piece is pushed down, the periphery of the abbreviated opening of the adjustment piece is deformed in the opposite direction, and the free end of the bimetal branch is shaped like an arrow Q. Displaced in the opposite direction. Therefore, the gap between the free end of the bimetal 01 and the contact piece (b) of the latch plate can be freely adjusted, thereby making it possible to adjust the thermal response characteristics of the bimetal vehicle.

Next, FIGS. 10 to 14 show a multi-pole type circuit breaker which is the gist of the present invention, in which three of the above-mentioned negative-pole type circuit breakers B are arranged in parallel to form a three-phase AC multi-pole circuit breaker. It consists of a pole type circuit breaker, and as shown in Fig. 11, each circuit breaker B
are fixed to each other by long fixings #31. The operation part of each hashidle (41) is fitted with a connecting shaft, and a connecting shaft is fitted into the horizontal hole I4 formed at the tip of each operation part. Each hashidor (4) is designed to interlock with each other.Both casings (21) (2a) and K of each circuit breaker B are each formed with a substantially fan-shaped projection as shown in FIG. In the present invention, by appropriately punching out the inner side of the center ridge of each circuit breaker, approximately fan-shaped openings (66a) are formed in the adjacent cages (21) <21> of each circuit interrupter IIB. However, this opening (66a) allows the K interlocking plate part η to be inserted.The length in the longitudinal direction of the interlocking plate @η is greater than the thickness when three circuit breakers B are stacked. It is slightly shorter.゛Also, the length of the interlocking plate @η in the width direction is
It is approximately equal to the radius of the approximately fan-shaped opening (brass),
Therefore, the interlocking plate part? ) is in contact with the center of the substantially fan-shaped opening (66a), and the other end in the width direction is bent so that it can rotate along the arc of the substantially fan-shaped opening (66a). . Figure 12 shows the hashidor (4) with the interlocking plate installed.
) indicates the position of the movable contact (6) when it is in the OFF position.As shown in F&, in this state, the movable contact (6) does not touch the interlocking plate Iη. It is something. Figure 13 shows a state in which any one of the circuit breakers B has tripped and the movable contact (6) has opened. In this state, the interlocking plate η is the movable contact (6). ), the latch plate aη of the other circuit breaker B is pressed by the interlocking plate part η and rotates, and as a result, the three circuit breakers B are activated almost simultaneously. It has a button for trip operation.

In the detailed explanation of the present invention, an overcurrent detection mechanism consisting of a bimetallic body and a short circuit current detection mechanism consisting of a yoke plate (2) and a magnetic adsorption piece @1) were shown as a load abnormality detection mechanism. It is also possible to use an earth leakage detection mechanism, an open phase detection mechanism, etc. instead.

The present invention is constructed as described above, in which a plurality of negative-pole type circuit breakers are arranged in parallel, and a movable contact is driven by a driving source in one contact opening direction when any one of the circuit breakers operates to break. An interlocking plate is provided in contact with @ to operate the contact breaking mechanism of the other circuit breaker, and this interlocking plate is inserted into a substantially fan-shaped opening formed in the mutually adjacent casing of each circuit breaker. Therefore, it is possible to interlock each contact breaking mechanism of a single-pole type circuit breaker with an extremely simple structure, and therefore, by stacking an appropriate number of single-pole type circuit breakers, the desired number of circuit breakers can be set. It is possible to configure a multi-pole type circuit breaker with a number of poles, and it has the advantage of significantly improving production efficiency because it can share the metal lid and production line with a - pole type circuit breaker. be. Further, in the present invention, the interlocking plate is inserted into the substantially fan-shaped opening,
One end in the width direction of the interlocking plate contacts the center of the substantially fan-shaped opening, and the other end in the width direction can rotate along the arcuate portion Ka of the substantially fan-shaped opening, so that the axis of the interlocking plate This has the advantage that there is no need to provide a special member such as a support, the structure is simple, and failures of the interlocking plate shaft support mechanism can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the appearance of a single-pole circuit breaker which is the basis of the present invention, Fig. 2 is a perspective view of the same as above with both casings open, and Figs. 3 and 4 are the same as above. A perspective view showing the components; FIG. 5 is a sectional view of the above circuit breaker in the OFF state; FIG. 6 is a sectional view taken along the line X-X of the above; FIG. 7 is a sectional view of the above circuit breaker in the OFF state. Figure 8 is a cross-sectional view of the circuit breaker as described above in a tripped state, Figure 9 is a cross-sectional view showing the adjustment mechanism for the thermal response characteristics of the bimetal used in the circuit breaker as described above, and Figure 1θ is the invention of the present invention. FIG. 11 is an exploded perspective view of the same, and FIGS. 12 and 13 are cross-sectional views of the same in the OFF state and the trip state, respectively. (21) (2g) is Keshishita, (4) is Hasidor,
(6) is a movable contact; (8) is a movable contact; (16) is a fixed contact; (16) is a bimetal; (66a) is an opening; and (3) is an interlocking plate. Agent Patent Attorney Ishi 1) Chief 7th figure 5th figure 6th figure 7th figure 2s figure 8th figure 9 W field 61 ft512 figure 13th figure

Claims (1)

[Claims] (11) A rotatable movable contact with a movable contact attached to one end, a fixed contact that contacts and opens with the movable contact by the rotating operation of the movable contact, and a movable contact and a fixed contact that open when an abnormality is detected in the load. A plurality of single-pole circuit breakers are installed in parallel, each having a contact breaking mechanism inside the casing that drives the movable contact in the direction of separation, and a hashidle that rotates the movable contact protruding outside the casing. When one of the circuit breakers is in the process of breaking operation, an interlocking plate is provided that comes into contact with the movable contact driven in the contact opening direction to operate the contact breaking mechanism of the other circuit breaker. The plate is inserted into the substantially fan-shaped opening formed in the mutually adjacent cages' and I' of each circuit speed breaker, so that one end in the width direction of the interlocking plate abuts the center of the substantially fan-shaped opening,
A multi-polar circuit breaker whose other end in the width direction is designed to be able to rotate along an arc of a substantially fan-shaped opening.