JPH0127556Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a remote control type multi-pole type circuit breaker.

Previously, for example, from JP-A No. 52-146874,
It was considered to construct a multi-pole type by arranging multiple single-pole remote control circuits and disconnectors in parallel.
This allows the use of single-pole remote-controlled circuit breakers and disconnectors, which greatly improves the productivity of remote-controlled multi-pole circuit breakers.

However, this remote-controlled multi-pole circuit breaker has the drawbacks of a large number of parts and an inability to prevent open-phase accidents.

Therefore, the purpose of this invention is to improve productivity, reduce costs, and reduce the number of parts.
Moreover, it is an object of the present invention to provide a remote control type multipolar circuit switch and disconnector that can prevent open-phase accidents.

That is, the remote control multi-polar circuit breaker of this invention includes an abnormal current detecting means, a fixed contact, a movable contact having a movable contact that connects and separates from the fixed contact, and the abnormal current detecting means. The latch link has a trip link that responds to the operation, and has a latch link that is latched to the trip link and is released by the operation of the trip link, and a handle that is supported in the latched state by the trip link of the latch link and can turn on and off the movable contact. A mechanism section configured to trip-open the movable contact by releasing the latch link when the movable contact is on, and turn on and off the movable contact when the latch link is latched to the trip link. a first circuit breaker having an operating electromagnet device, a power supply side terminal device and a load side terminal device between which the fixed contact, the movable contact, and the abnormal current detection means are connected; a second circuit breaker having the same configuration as the circuit breaker and installed in parallel with the first circuit breaker; and a second circuit breaker having the same configuration as the first circuit breaker; and a trip linking rod having a latch sensing arm that is provided astride between the latch link and the disconnector and that responds to the operation of the latch link, and a trip link tripping arm that trips and operates the trip link by the operation; The present invention is characterized in that the coils of the operating electromagnet devices of the circuit breakers and the second circuit breakers are connected in series.

According to the configuration of this invention, the movable contact can be turned on and off by operating the handle and operating the operating electromagnet device. Further, when the mechanism section of one pole is tripped by the operation of the abnormal current detection means, all the mechanism sections of the other pole are tripped by the trip interlocking rod. In this case, by arranging multiple single-pole circuits and disconnectors in parallel, most single-pole parts can be used, resulting in high productivity and low cost.In addition, since the coils of the operating electromagnet device are connected in series, The number of terminals of the operating electromagnet device can be reduced, reducing the number of parts, and if one coil is disconnected, all the other poles become inoperable, so open-phase accidents can be prevented.

An embodiment of this invention is shown in FIGS. 1 to 20. First, let me explain the structure of one pole.This is a 30 ampere frame type that detects line overcurrent and short circuit current and performs trip operation, and can be turned on, off, and reset by the handle and operation signal. ing.

The outer shell mainly consists of case 1 and lid 2 as shown in Figure 10.
The case 1 is rectangular with a narrow width and has an opening 3 formed on one side, a lid 2 is closed in this opening 3, and the case 1 is assembled into one body with stop pins 4 to 6 at three connecting holes A to C. . Further, the shoulder portions of the lid 2 and the other side of the case 1 are formed into a taper 7, and the upper portions of both end walls of the case 1 are formed with step-like steps 8 to 11, and the lower end portions are formed with a mounting groove 12. ing.

The terminals are mainly the main terminal 1 for the electrical circuit as shown in Figure 7.
3, 14, and operation terminals 15, 16 for operation signals, and the main terminals 13, 14 consist of a power supply side terminal device 13 and a load side terminal device 14. This terminal device mainly consists of a substantially U-shaped terminal frame 17 as shown in FIG.
a, 17b, a washer 18 with a presser protrusion, a spring washer 19, and a terminal screw 20 as component parts,
A screw hole 22 is formed in the upper piece 21 of the terminal frames 17a and 17b, respectively, and the washer 19 and washer 18 are passed through the terminal screw 20, and the terminal screw 20 is inserted into the screw hole 2.
It is screwed into 2. Furthermore, the power supply side terminal device 13
The hanging piece 24 is formed by bending the end of the lower piece 23 of the terminal frame 17a downward, and is attached to the step 9 on the lower side of one end of the case 1. Therefore, this stepped portion 9 forms a screw loose insertion groove 25 and a fixing slit 26 which are open on the upper surface thereof and on the side of the opening 3 of the case 1. When the terminal frame 17a is inserted into the fixing slit 26 from the opening 3 side of the case 1 as shown in FIG. 7 and the terminal screw 20 is passed through the loose insertion groove 25, the hanging piece 2
4 serves as a retainer against the outer end wall of the case 1, and when the lid 2 is closed, the cover 2 is fixed as a retainer against the disengager in the opening direction. Load side terminal device 14
is attached to the lower step 8 of the other end of the case 1, and similarly forms a loose screw insertion groove 25 and a fixing slit 26, and further forms a slit 27 for attaching a fixing screw. The terminal frame 17b is formed by bending the end of the lower piece 28 upward to form a vertical piece 29, and forming a screw hole 30 in the center of the vertical piece 29.
A driver insertion hole 32 is formed in the intermediate piece 31 of the terminal frame 17b facing the terminal frame 17b. Temporarily screw the fixing screw 33 into the screw hole 30, attach the terminal device 14 from the opening 3 side of the case 1 as shown in FIG. Tighten it to the edge and it will be fixed without wobbling. In this way, the upper piece 21 of the terminal frames 17a, 17b is positioned on the upper surface of each stepped portion 8, 9, and the connection is made by passing an electric wire (not shown) between the washer 18 and the upper piece 21, and
This is done by turning the terminal screw 20 and tightening the terminal screw 20. The operation terminals 15 and 16 are a pair of terminal screws 35 screwed into the upper part of the U-shaped terminal frame 34, and are smaller in shape than the terminal device described above.
It is attached to the upper step part 11 of the step part 9 where No. 3 is located. That is, a fixed slit 36 is formed in the stepped portion 11, two terminal frames 34 are inserted from the opening 3 side, and an insulating plate 37 is interposed between the terminal frames 34.
It is fixed by closing the lid 2. In addition, a pair of auxiliary terminals 38 and 39 are provided on the upper step part 10 on the load side terminal device 14 side as shown in FIGS. 7 and 10.
is provided. These auxiliary terminals 38 and 39 are for transmitting detection signals of on/off and trip operations of the circuit breaker to an external notification lamp or buzzer. This is a Z-shaped terminal plate 40 with a screw 41 screwed into the lower piece, which is inserted into a slit 42 formed in the stepped portion 10 and partitioned by an insulating plate 43.

The electric circuit between the main terminals 13 and 14 mainly includes a contact portion 43 as shown in FIG.
14 are arranged almost in a straight line. Contact part 43
1 controls the opening and closing of the electric circuit, and is composed of a movable contact 48 having a fixed contact 46 and a movable contact 47. In order to position this contact part 43, a partition plate 50 having a height of about 1/3 of the height of the case 1 is set up in the center of the bottom plate 49 of the case 1, and when viewed from the opening 3 side of the case 1, An arc extinguishing chamber 51 is formed on the left side, an operation electromagnet storage chamber 52 is formed on the right side, and a fixed contact plate 53 is bent into an inverted U shape along the surface of the partition plate 50 to form an arc extinguishing chamber 51 on the opening 3 side of the case 1. A width plate 5 is pushed in while being guided by the partition plate 50 and provided at the end on the storage chamber 52 side.
4 is positioned by abutting the rear end of the case 1 on the rear surface of the case 1 when viewed from the opening 3 side. The fixed contact 46 is fixed to the arc extinguishing chamber 51 side of the fixed contact plate 53. Further, the width plate 54 and the terminal frame 17 in the case 1
A slit 55 is formed in the lower part of the storage chamber 52 between the width plate 54 and the terminal frame 17 as shown in FIG.
It is connected to a. The movable contact 48 is the eleventh
As shown in the figure, it is composed of a movable contact plate 57, a contact frame 58, a contact pressure applying spring 59, and a movable contact 47, and the movable contact plate 57 and the contact frame 58 are pivotally connected at the upper part by a pin 60. pin 6 like
A contact pressure applying spring 59 is installed in a compressed state between the upper end portions of the contact plate 57 and the contact frame 58 on the upper side of the contact point plate 57 .
Due to this spring 59, the intermediate portion of the contact plate 57 comes into elastic contact with the lower end portion 61 of the contact frame 58, resulting in a stable state. The movable contact 47 is fixed to the lower end of the movable contact plate 57, and a pothole 62 for forced contact opening is formed above it. The movable contact 48 is pivotally supported by a pin 63 above a pothole 62 at the lower end of the contact frame 58 to a latch link 64, which will be described later, so that the movable contact 47 faces the fixed contact 46 as shown in FIG. .

The plunger type electromagnet device 44 detects short circuit current, and mainly uses the yoke 65 as shown in FIG.
, the coil 66 , the coil tube 67 , and the fixed iron core 6
8, a return spring 69, a plunger 70, and a movable rod 71 as constituent parts. First, the yoke 65 consists of a U-shaped frame 72 and a stop plate 73, and the stop plate 73 has a protrusion 76 and a square hole 77 fitted between an upper piece 74 and a lower piece 75 on the opposite side of the vertical piece 72a of the U-shaped frame 72. The construction is fixed by crimping. This yoke 65 integrally forms a frame 79 of a mechanism section 78, which will be described later.
One side plate 80 of the frame 79 is raised above one side edge of the upper piece 74, and a protrusion 80 is placed on the other side of the upper piece 74.
1 and a square hole 83 at the lower end of the opposing side plate 82.
are fitted and caulked to stand the side plate 82 upright. Further, an arc traveling plate 84 is bent and extended from the lower end of the contact plate 73, and is located below the lower piece 75 of the U-shaped frame 72, with an insulating plate 85 interposed therebetween. This frame 79 has notched recesses 86 formed in both side plates 80 and 82, and a shaft 88 is passed through the recesses 86 to support the frame 79. One end of the shaft 88 is located above the arc extinguishing chamber 51 on the side plate 1a of the case 1. The other end is fitted into the bottomed mounting hole 87 (Fig. 5) of the
As shown in the figure, it is fitted into a presser cylinder 89 formed inside the lid 2. At this time, press the side plate 82 with the opening edge of the presser cylinder 89 to move the side plate 80 to the side plate 1a of the case 1.
to support. Furthermore, four ribs 91 provided in the vicinity of the attachment hole 87 of the side plate 1a are engaged with the side edges of the U-shaped frame 72 and the contact plate 73, so that the attitude of the yoke 65 is determined. The fixed core 68 has a through hole 92,
The movable rod 71 is fitted from the inside into a hole 93 formed in the vertical piece 72a of the U-shaped frame 72 and fixed by caulking, and the movable rod 71 is inserted through the through hole 92. The coil tube 67 has a small diameter portion 94 at one end, and the small diameter portion 94 is fitted into a mounting hole 95 formed in the backing plate 73, and the other end is fitted onto the fixed iron core 68 for construction. The plunger 70 is slidably fitted into the coil tube 67, and a forced opening rod 96 protrudes from one end of the plunger 70 and protrudes outward from the small diameter portion 94 of the coil tube 67. A collar 97 is formed at its tip, and the fixed contact 46 It passes through the large diameter side of the pothole 62 of the movable contact plate 57 opposite to the movable contact plate 57 and is located on the small diameter side thereof (FIG. 7). The return spring 69 is compressed and installed between the fixed iron core 68 and the plunger 70. The coil 66 has a large wire cross-sectional area, so it has rigidity, and the hole of the coil 66 is fitted into the coil tube 67, and a flexible copper stranded wire 98 is welded to one end, and the tip is connected to the movable contact plate. 5
It is welded to the upper end of 7. With such a configuration, in this electromagnet device, the operation of the plunger 70 is limited by the spring force of the return spring 69 when only the rated current or overcurrent flows through the coil 66, but when a short circuit current flows, the operation of the plunger 70 is restricted by the fixed iron core 68. plunger 70
The magnetic flux between the fixed iron cores 68 and 68 increases, and the plunger 70 is attracted to the fixed iron core 68 by overcoming the force of the return spring 69, and the plunger 70 operates. As a result, the movable rod 71 is pushed by the plunger 70 and the vertical piece 7 of the U-shaped frame 72
2a, and the collar 97 of the forced contact opening rod 96 engages with the small diameter side of the pothole 62 and acts to draw the movable contact plate 57 together.

The bimetal 45 detects overcurrent, and as shown in FIGS. 7 and 10, it is bent into a substantially L-shape consisting of a horizontal piece 98 and a diagonal piece 99.
Thread the gap adjustment screw 100 into the upper end of 9.
A caulking hole 101 is formed in the horizontal piece 98. This bimetal 45 is the lower piece 2 of the load side terminal device 14.
8, the hanging piece 102 is cut down, the caulking hole 101 is fitted into the protrusion 103 of the hanging piece 102, and the hanging piece 102 is caulked and fixed in the position shown in the figure. In this case, since the terminal device 14 is fixed without wobbling by the fixing screw 33, the bimetal 45 is also fixed in a fixed position. The other end of the coil 66 and the upper end of the bimetal 45 are welded together by a flexible copper stranded wire 104, and when a current flows between the copper stranded wire 104 and the terminal 14, the bimetal 45 is heated by its own Joule heat. ,
Since the high expansion side is located on the terminal 14 side, the diagonal piece 99 is bent in the direction away from the terminal 14. The curved operation is set to operate with an overcurrent several times the rated current.

From the above configuration, the electric path is sequentially formed from the power supply side terminal device 13 to the connecting copper stranded wire 56, the fixed contact plate 53,
Fixed contact 46, movable contact 47, movable contact plate 57,
It is connected to the load side terminal device 14 via the copper stranded wire 98, the coil 66, the copper stranded wire 104, and the bimetal 45. Opening and closing are controlled by the contact portion 43. In addition, the arc extinguishing chamber 51
The terminal device 14 on the load side of the end wall 1b of the case 1 constituting the arc extinguishing chamber 51 quickly separates the arc generated between the contacts 46 and 47 and extinguishes it.
An exhaust port 105 is formed at the bottom of the fixed contact plate 53.
The arc traveling plate 106 is continuously extended from below the fixed contact 46 and laid along the partition plate 50 and the bottom plate 49 of the arc extinguishing chamber 51, and is connected to the upper arc traveling plate 8.
A de-ion grid 107 is provided between the arc travel plates 84 and 106 on the inside of the exhaust port 105 and opposite to the discharge port 105 . A protruding rib 108 is provided on the center line of the arc traveling plate 106 from the fixed contact 46 to the grid 107 to facilitate the traveling of the arc and avoid sticking. The operation of the arc extinguishing device is such that when an arc is generated between the contacts 46 and 47 due to the opening of the contacts 46 and 47 during a short circuit, the current path including the arc is connected to the fixed contact plate 53, the fixed contact 46, the arc, Since the movable contact 47 and the movable contact plate 57 form a U-shape, an electromagnetic driving force that drives the arc toward the grid 107 is generated. As a result, the arc leaves the contacts 46, 47 and travels on the arc running plates 84, 106, and when it approaches the deionization grid 107, it is attracted and moves to the grid 1.
The gas enters into the arc 07 and is divided and cooled by the grid 107 to extinguish the arc, and the gas is exhausted from the exhaust port 105. In this way, short-circuiting and disconnection can be made faster.

The mechanism section 78 for turning on, off, tripping, and resetting the movable contactor 43 is composed of a trip link 109, a latch link 64, an operation link 110, a handle 111, and an operation electromagnet device 112, as shown in FIG. The trip link 109 is connected to the vertical piece 113 and the vertical piece 1 as shown in FIG.
It consists of a side piece 114 that is integrally connected at the middle part of the vertical piece 113, and the ear piece 11 is located on the side opposite to the side piece 114 of the vertical piece 113.
5 and a shaft hole 1 in the side piece 114 and the ear piece 115.
16, and the hole 11 at the end of the bimetal 45 side of the side pieces 80, 82 of the frame 79 is formed by a pin 117.
It is supported by 8. The lower end of the vertical piece 113 is the seventh
As shown in the figure, it is located in front of the movable rod 71 of the plunger type electromagnet device 44, and the upper end portion is a bimetal 4.
It is located in front of the gap adjustment screw 100 of No. 5.
Further, the side piece 114 stands obliquely upward, and has a downwardly directed hook portion 119 formed on the obliquely upper edge side of its upper end, and the upper end edge is formed into an arcuate surface 120 . A torsion coil spring 121 for return is inserted into and supported by the pin 117 of this trip link 109, and one end portion 121a thereof
is engaged with the oblique lower edge of the side piece 114, and the other end 121b
are abutted against and locked to the upper piece 74 of the yoke 65 to urge the trip link 109 to rotate counterclockwise in FIG. It is designed so that it can be locked by coming into contact with it. The latch link 64 has a pair of elongated side pieces 122, 123 facing each other, and the left side edge of the upper end (FIG. 11) is connected by a latch bridging piece 124.
A pin 126 is passed through the frame 79, and the pin 126 is pivotally mounted on the movable contact 48 side of the side pieces 80, 82 of the frame 79. A return torsion coil spring 127 is supported by the pin 126, one end 127a of which is engaged with the upper piece 74 of the yoke 65, and the other end 127b is engaged with the lower edge of the side pieces 122, 123. The spring action urges the latch link 64 to rotate clockwise in FIG. The upper end of this latch link 64 intersects with the upper end of the trip link 109, and the latch part 128 at the lower end of the bridging piece 124 is connected to the hook part 11 of the trip link 109.
9 in the rotation direction. Therefore, when the latch link 64 is rotated to the left against the spring force of the spring 127, the latch portion 128 slides on the arcuate surface 120 of the trip link 109, causing the trip link 109 to rotate to the right against the spring action. , the latch portion 128 is engaged with the hook portion 119. As a result, the trip link 109 and the latch link 64 are brought into a reset state, and the posture of the trip link 109 becomes the detection position of the adjustment screw 100 and the movable rod 71 by the vertical piece 113. When the trip link 109 operates, the latch link 64 is disengaged and released, resulting in a trip state. A pin 63 supporting the movable contact 43 is pivotally supported in a hole 129 at the lower end of the latch link 64. Note that an insulating projection is provided on the surface of the abutting plate 73 of the yoke 65.
A counter plate N ₂ is formed integrally with the case ₁ above the contact plate 53, and a contact plate 57 hangs between the two, and the contact plate 57 covers the interval between them. The distance is set to the maximum distance that allows the arc to move, thereby preventing the arc from moving upward.

The handle 111 is made of an insulating material and has a tenth
As shown in the figure, it is inserted from the opening 3 side into a handle groove 130 formed slightly to the right in the center of the top plate 1c of the case 1, and is rotatably supported on the case 1 by a shaft 131 at the bottom of the groove 130. . This handle 111 has an interlocking rod through hole 132 formed at the upper end of the part protruding from the case 1, a connecting hole 133 (FIG. 12) formed at the lower end with the shaft 131 in between, and furthermore, as shown in FIG. As shown, an arm 134 extends to the right in a substantially horizontal direction from the position of the shaft 131, and a plunger connecting hole 135 (FIG. 12) is formed in the arm 134. 136 is a circular arc shade that closes the gap between the handle groove 136. One end of the operation link 110 is connected to the connecting hole 133 by a pivot pin 138, and the other end is connected to a pivot pin 60 that supports the movable contact plate 57 and the contact frame 58. The posture of the handle 111 in FIG. 13 (tilted to the right) is in the on state,
By tilting to the right, the operation link 110 is pushed and the movable contact 48 is pushed. Since the latch link 64 is latched to the trip link 109, the movable contact 48 rotates about the pin 63, and the movable contact 47 moves to the fixed contact 46. come into contact with. When the handle 111 is further pushed to the home position, the movable contact 47 is in contact with the fixed contact 46, so the movable contact plate 5
7 rotates about the pin 60, which compresses the contact pressure applying spring 59, thereby applying contact pressure. In this way, the contact portion 43 is closed, resulting in an on state, and this state is maintained by the operating electromagnet device 112, which will be described later. FIG. 14 shows the handle 111 in the OFF state (tilted to the left). In this case, too, the movable contact 48 rotates around the pivot pin 63 of the latch link 64, and when the handle 111 is tilted to the left, the operating link 111 is pulled and the operation link 110
Since the upper end of the movable contact 48 is pulled by the
7 separates from the fixed contact 46 and opens. This off operation also resets the latch link 64 after the trip operation. That is, in the trip-free state, the latch link 64 is released from the trip link 109 and rotates about the pin 126 by the spring 127, so the latch link 64
is in the state shown in FIGS. 15 and 16, but when the handle 111 is tilted to the left to the home position, the movable contact 48 pulls the operation link 110.
As a result, the latch link 64 rotates to the left about the pin 126 against the spring force of the spring 127, and the latch part 128 slides on the arcuate surface 120 of the trip link 109, and the hook part 119 This leads to it being locked in place.

The operating electromagnet device 112 is inserted into the storage portion 52 in an upright position against the bottom plate 49 of the case 1 with the side from which the plunger linking rod 139 protrudes as shown in FIGS. 10 to 13 at the top; The connection rod 13
9 is connected to the plunger connecting hole 135 of the handle 111 by a pin 140, and the coil end 1
41 is connected to the operating terminals 15 and 16 through a slit 142 in the upper part of the storage wall. This electromagnet device 1
Reference numeral 12 is a polar type, and as shown in FIG. are integrally formed, and storage openings 149 and 150 that open outward are formed on opposite sides thereof. This coil frame 1
43 with the openings 149 and 150 left open, an inverted U-shaped yoke 151 is attached, and a bottom plate yoke 152 is attached to the lower end.
and caulk the edge of the yoke 151. The plate-shaped plunger 153 has an engagement hole 154 at one end, and the engagement hole 154 and the edge communicate with each other through a groove 155.
It is slidably passed through the square hole 144 of No. 3. Further, the linking rod 139 has a circular portion 156 formed at its lower end, which is engaged with the engagement hole 154 through a groove 155 so as to be swingable in the plate width direction, and its upper end is connected to the yoke 151.
It protrudes from a locking hole 158 formed in the upper piece 157, thereby smoothing the interlock between the handle 111 and the plunger 153. Magnetic pole N in the plate thickness direction,
Two permanent magnets 159 and 160 having S are placed in the storage openings 149 and 150, and the protective plate 1 is placed in the notch 161 formed on both sides of the opening edge and in the yoke 151.
The ends of magnets 159 and 16 are locked together.
It is attracted and held by a magnetic force of 0. This magnet 15
Since the magnetic poles N and S of 9 and 160 are housed so that the same poles face each other as shown in FIG.
52 and plunger 153 as a route.
Create a magnetic path like the arrow in the figure. Therefore, when the plunger 153 is in the lower position and approaches the yoke 152, and when it moves to the upper position and approaches the upper piece 1 of the yoke 151,
57, each is latched. Also, the yokes 151, 152 and the arm 1 of the handle 111
A return coil spring 164 is compressed between 34 and 34. This electromagnetic device 112 operates when the handle 111 is turned on or off in a non-energized state.
Due to its force, the connecting rod 139 and the plunger 1
53 moves up and down, and as described above, the plunger 153 is moved by the magnetic force of the permanent magnets 159 and 160.
Since the upper and lower positions are respectively maintained, the on and off states of the handle 111 are maintained, respectively, so that the movable contact 48 contacts the fixed contact 46 with contact pressure as shown in FIG. It is held in the open state shown in FIG. 14. Furthermore, when a pulse of unidirectional operating current is applied to the operating terminals 15 and 16 in the on state shown in FIG.
moves upward, and after the current stops, the permanent magnet 159,
160. With this operation, the handle 111 is turned off via the link rod 139, and the movable contact 4 is turned off via the operation link 110.
8 performs an opening operation. On the other hand, when a pulse of operation current in the opposite direction is applied to the operation terminals 15 and 16, the 13th
From the state shown in the figure, the plunger 15 is moved by the magnetic force of the coil.
3, and after the current stops, the permanent magnets 159 and 16
0, it is attracted and held by the yoke 152. This action rotates the handle 111 in the on direction,
The movable contact 48 is held in contact with the fixed contact 46 with contact pressure, and is turned on. Furthermore, in the tripped state described above, the latch link 64 is released from the trip link 109 and rotates by its spring 127, as shown in FIGS. 15 and 16.
The pin 13 of the handle 111 is rotated by the rotation of the pin 63.
The movable contact 48 rotates about 8 as a fulcrum via the operation link 110, and trip-free operation is performed in which the movable contact 47 is opened from the fixed contact 46 without operating the handle 111 and the plunger 153 of the electromagnetic device 112.

The trip test button 165 is used to arbitrarily test the trip operation of the mechanism section 79. That is, case 1 as shown in FIGS. 7 and 10
A mounting groove 166 is formed on the top plate 1c to the left of the groove 130 of the handle 111, and a test button 165 is formed in this.
Insert from the opening 3 side. Mounting groove 1 within groove 166
66 bottom 167 and test button 165 flange 1
Compress the return coil spring 169 between the
Push test button 165 upward. Test button 16
The lower end of 5 faces the upper edge of trip link 109. Therefore, when the test button 165 is pressed, the side piece 114 of the trip link 109 is pressed at its lower end.
The trip link 109 rotates to the right to push against the arcuate surface 120 (FIG. 11), thereby releasing the engagement with the latch link 64 and performing the tripping action.

The remote control type multi-polar circuit breaker configured as described above is closed and fixed by placing each component between the case 1 as described above and closing the lid 2. At this time, the mechanism section 79 is housed in the case 1 in one block together with the electromagnetic device 44 that performs an instantaneous tripping operation, the movable contact 48, and the arc traveling plate 84. Further, the bimetal 45 which performs a time-limited tripping operation is housed together with the load-side terminal device 14 in one block. Further, this breaker is used with the bottom plate 49 of the case 1 attached to the vertical mounting surface with the power supply side terminal device 13 facing upward. At this time, the plunger 153 of the operating electromagnet device 112 assumes a horizontal attitude with respect to the ground, and operates in the horizontal direction. Furthermore, this remote control multi-pole type circuit breaker shows the structure for one pole; in the case of multiple poles, the same structure is installed side by side on the side, and the case and lid are stacked. They are connected together by passing caulking pins through the connecting holes A to C. Specifically, in the case of two poles, unevenness having the same shape as that shown in FIG. 6 is symmetrically formed on both sides of the lid 2, and a case having a symmetrical shape at the opening with the case 1 is stacked on the outer surface of the lid. In the case of a three-pole case, the uneven shape of the lid 2 is formed on the outer surface of the two-pole case 1, and a case having the same shape as the case 1 is stacked on the outer surface, and each case is integrally connected with a common caulking pin. Internal parts are common. Furthermore, for multiple poles, as shown in FIG. 18 for three poles, the on/off interlocking rods 170 are passed through the interlocking rod holes 132 of the handles _111a to 111c of each case L1 to _L3 , and the trip interlocking rods shown in FIG. 171 is arranged above the intersection of the trip link 109 and the latch link 64 as shown in the imaginary line in FIG. This trip interlocking rod 1
Reference numeral 71 denotes a latch link sensing arm 172 facing the trip link 109 and latch link 64 of each pole.
The sensing arm 1 is attached to the latch link 64 which has a large rotation amount and is rotatably supported by the side plates of the cases L ₁ to _{L 3} at both ends.
72 is listed. For example, if an abnormal current flows in the circuit of one pole and a trip occurs, the latch link 6
4 is rotated upward by the spring 127, the latch link sensing arm 172 is pushed and rotated to the left in FIG.
3 rotates and pushes the trip link 109 in the tripping direction. As a result, the other poles also trip at the same time. On the other hand, when the handle of one pole is turned on or off by hand or the electromagnetic device 112 using the on/off interlocking rod 170, the handle of the other pole is also turned on or off at the same time. Furthermore, as shown in FIG.
a to 147c are connected in series, and the operating terminal 1
5 and 16 are only for one pole as shown in FIG. Therefore, when an operation signal is sent to the operation terminals 15 and 16, each electromagnetic device 112 operates during operation and performs the same operation, but on the other hand, if there is a disconnection in the coil, all the devices 112 will not operate.

Next, we will summarize the operation of this remote control multi-pole type circuit breaker. That is, the on state is shown in FIG. 17a and FIG. 13. In this case, the latch link 64 is latched to the trip link 109, the handle 111 is tilted to the right, the movable contact 48 is brought into contact with the fixed contact 46, and the plunger 153 of the operating electromagnetic device 112 is moved downward to protrude the yoke 152. Piece 1
52' by permanent magnets 159 and 160. As mentioned above, the handle 11 is used for this holding.
1 and the movable contact 48 are held in the on position. Note that this ON operation may be performed by directly operating the handle 111 or by sending signals to the operating terminals 15 and 16 to drive the plunger 153 upward.

The off state is shown in FIG. 17b and FIG. 14. As before, the latch link 64 is latched, the handle 111 is tilted to the left, and the movable contact 48 is therefore in the open state. Also, the operating electromagnet device 1
The twelve plungers 153 are moved to the upper position and held there. Its working relationship and operation mode are the same as in the on state.

Among the trip states, overcurrent trip is shown in FIG. 17c and FIG. 15. That is, the first
When an overcurrent flows through the electric circuit in the on state shown in FIG. 3, the self-heating of the bimetal 45 gradually pushes the trip link 109 and releases the latch link 64, causing the latch link 64 to rotate. As a result, the movable contact pivot pin 63 moves downward, and since the handle 111 remains held by the plunger 153, the movable contact 47 separates from the fixed contact 46, and the electric path is finally severed. As described above, the reset after tripping is performed when the handle 111 is turned to the OFF position from the state shown in FIG. rotate to
Latch portion 128 is latched to hook portion 119 of trip link 109. Of course, the operation terminal 15,
A signal may be applied to 16 to actuate electromagnetic device 112 to actuate handle 111 to the off position.

The short circuit trip is shown in FIGS. 17d and 16. In other words, when a short circuit current flows through the electrical circuit in the on state, the plunger 96 of the electromagnetic device 44
is attracted to the fixed iron core 68. As a result, the movable rod 71 is pushed out and pushes the lower end of the trip link 109, and since the trip link 109 rotates, the latch link 16 is released, and the movable contact 48 is opened as described above. However, movable contact 4
8, before the contact is opened by such link interlocking, that is, at the exact same time as the plunger 70 operates, the collar 97 of the forced contact opening rod 96 engages and pulls the contact plate 57, thereby fixing the movable contact 47. Contact 46
Separate from. That is, just before the latch link 64 is tripped, the contact plate 57 rotates about the pin 60 in a direction that compresses the contact pressure applying spring 59 and performs an opening operation. The reset operation is the same as described above.

As mentioned above, the remote control multi-pole circuit breakers and disconnectors of this invention are highly productive and inexpensive because they can use almost all single-pole components by arranging multiple single-pole circuit breakers in parallel. In addition, since the coils of the operating electromagnet device are connected in series, the number of terminals of the operating electromagnet device can be reduced, reducing the number of parts.Also, if one coil is disconnected, all other poles will not operate. This has the effect of preventing open-phase accidents.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of this invention, Fig. 2 is a side view thereof, Fig. 3 is a front view, Fig. 4 is a rear view, Fig. 5 is a side view of the case, and Fig. 6 is a lid. 7 is a side view with the lid removed, FIG. 8 is a partially cutaway plan view, FIG. 9 is a sectional view taken along the line of FIG. 7, and FIG. 10 is an exploded perspective view. FIG. 11 is an exploded perspective view of the movable contactor, electromagnet device, and mechanism, and FIG. 12 is an exploded perspective view of the operating electromagnet device.
Fig. 13 is a sectional view of the on state, Fig. 14 is a sectional view of the off state, Fig. 15 is a sectional view of the tripped state by bimetal, Fig. 16 is a sectional view of the tripped state by the electromagnetic device, and Fig. 17 is the operation. Diagram, 1st
FIG. 8 is a plan view of the three-pole circuit breaker, FIG. 19 is a perspective view of the trip linking rod, and FIG. 20 is a wiring diagram of the operating electromagnet device. 13... Power supply side terminal device, 14... Load side terminal device, 44... Plunger type electromagnet device which is abnormal current detection means, 45... Bimetal which is abnormal current detection means, 46... Fixed contact, 47... Movable contact, 48
...Movable contactor, 64...Latch link, 78...Mechanism section, 109...Trip link, 111...Handle, 112...Operation electromagnet device, 147a-14
7c...Coil, 171...Trip interlocking rod, 172
... Latch link sensing arm, 173... Trip link tripping arm.

Claims (1)

[Claims for Utility Model Registration] Abnormal current detection means, a fixed contact, a movable contact having a movable contact that connects and separates from the fixed contact, and a trip link that responds to the operation of the abnormal current detection means. It has a latch link that is latched to and released by the operation of the trip link, and a handle that is supported in the latched state by the trip link of the latch link and can turn on and off the movable contact. a mechanism section that trip-opens the movable contact when the movable contact is released; and an operation electromagnetic device that turns on and off the movable contact while the latch link is latched to the trip link;
a first circuit breaker having a power supply side terminal device and a load side terminal device between which the fixed contact and the movable contact and the abnormal current detection means are connected; a second circuit breaker installed in parallel with the first circuit breaker; and a second circuit breaker installed between the first circuit breaker and the second circuit breaker. a trip linkage rod having a latchlink sensing arm that is disposed in response to the operation of the latchlink, and a triplink tripping arm that trips and operates the triplink in response to the operation of the triplink; A remote control type multipolar circuit breaker, characterized in that the coils of the operating electromagnetic devices of each of the second circuit breaker are connected in series.