JPH0319164Y2 - - Google Patents

Description

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

Conventionally, in a circuit breaker having a remote control electromagnetic device for controlling the circuit on and off together with a handle, the operation terminal Z ₁ is as shown in FIG. 20 to 22.
As shown in the figure, it was provided on the side of the power supply side terminal Z ₂ or the load side terminal Z ₃ . Z ₄ is the outer shell and Z ₅ is the handle. This resulted in the disadvantage that the width of the outer shell _Z4 of the cutter became large, requiring a large installation area for the cutter (for example, JP-A-48-13868).

In addition, there were devices that had another terminal above the main terminal (for example, Utility Model Publication No. 55-42364), but this had the disadvantage that the upper terminal got in the way when connecting the main terminal, making it difficult to connect. .

Therefore, an object of this invention is to provide a remote control type circuit breaker which reduces the installation area of the breaker without making terminal connection difficult.

That is, this invention consists of an outer shell, main terminals provided at slightly lower portions of both end walls of the outer shell,
an operating electromagnet device disposed inside the outer shell on either one of the end walls, a coil portion located inside the main terminal, and an operating portion protruding above the coil portion; and the operating electromagnet. an operating terminal located above the coil section of the device in a space on the side of the operating section and recessed in the upper part of the end wall of the outer shell so as to form a step shape above the main terminal; It is prepared.

According to the configuration of this invention, since the operation terminal is provided above the main terminal, the width of the outer shell can be reduced by the amount of the operation terminal compared to the conventional example, so that the installation area of the disconnector can be reduced. In addition, the operation terminals are provided in a stepped manner on the shoulder of the outer shell, so they do not interfere with the connection of the main terminals.
Furthermore, since the operating terminal and the operating electromagnet device are provided close to each other, wiring between them is easy, and the operating terminal is connected to the upper side of the coil section of the operating electromagnet device and the side between the operating section. Since it is located in a small space, the extra space within the outer shell can be effectively utilized and the circuit breaker can be downsized.

An embodiment of this invention is shown in FIGS. 1 to 19. 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 the opening 3, and the case 1 is assembled together with stop pins 4 to 6 at three connecting holes A to C. . In addition, the shoulder portions on the other side of the lid 2 and the case 1 are formed into a taper 7, and the case 1
Stepped portions 8 to 11 are formed in the upper portions of both end walls, and a mounting groove 12 is formed in the lower end portion.

The terminals are main terminals 13 for electrical circuits as shown in FIG.
14 and operation terminals 15 and 16 for operation signals, and the main terminals 13 and 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. A screw hole 22 is formed in the upper piece 21 of the terminal frame 17a, 17b, respectively, and a washer 1 is formed in the terminal screw 20.
9 and the washer 18, and the terminal screw 20 is screwed into the screw hole 22. Furthermore, the power supply side terminal device 13 is formed by bending the end of the lower piece 23 of the terminal frame 17a downward to form a hanging piece 24, which is attached to the lower step 9 at one end of the case 1. Therefore, this stepped portion 9 has a loose screw insertion groove 25 that opens on its upper surface and the opening 3 side of the case 1, and a fixing slit 26.
and is formed. The terminal frame 17a is placed in case 1.
As shown in Fig. 7, from the opening 3 side of the
When the terminal screw 20 is passed through the 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. The fixing screw 33 is temporarily screwed into the screw hole 30, and the device 14 is attached from the opening 3 side of the case 1 as shown in FIG. 7 in the same manner as described above.
When the fixing screw 33 is tightened to the side edge of the slit 27 using a driver (not shown), it is fixed without wobbling. In this way, the upper piece 21 of the terminal frames 17a, 17b
are located on the upper surface of each stepped portion 8, 9, and connection is performed by passing an electric wire (not shown) between the washer 18 and the upper piece 21, turning it around the terminal screw 20, and tightening the screw 20. The operation terminals 15 and 16 are made up of a pair of terminal screws 35 screwed into the upper part of the U-shaped terminal frame 34, and have a smaller shape than the terminal device, and are located at the position of the power supply side terminal device 13 of the case 1. It is attached to the upper step 11 of the step 9. 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 the terminal frame 3 is inserted into the fixed slit 36.
The lid 2 is fixed by interposing an insulating plate 37 between the lids 4 and 4 and closing the lid 2. Note that the upper step portion 10 on the load side terminal device 14 side is provided with the
A pair of auxiliary terminals 38 and 39 are provided as shown in FIG. These auxiliary terminals 38 and 39 are for transmitting detection signals for 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 electrical path between the main terminals 13 and 14 is mainly composed of a contact portion 43, a plunger type electromagnet device 44, and a bimetal 45 as shown in FIG. 10, which are arranged almost in a straight line between the terminals 13 and 14. be done. The contact section 43 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 portion 43, the case 1 is placed in the center of the bottom plate 49 of the case 1.
A partition plate 50 having a height of about 1/3 of the height of the case 1 is erected to form an arc extinguishing chamber 51 on the left side and an operating electromagnet storage chamber 52 on the right side when viewed from the opening 3 side of the case 1. , fixed contact plate 5 along the surface of the partition plate 50
3 into an inverted U-shape, insert it while guiding it to the partition plate 50 on the side of the opening 3 of the case 1, and insert the rear end of the width plate 54 provided at the end on the side of the storage chamber 52 into the opening 3 of the case 1. It is positioned by coming into contact with the back surface when viewed from the side. The fixed contact 46 is connected to the arc extinguishing chamber 51 of the fixed contact plate 46.
fixed to the side. Further, a slit 55 is formed in the lower part of the storage chamber 52 between the width plate 54 and the terminal frame 17a in the case 1, and a stranded copper wire 56 or a conductive plate is inserted into the slit 55 to increase the width as shown in FIG. The plate 54 and the terminal frame 17a are connected. The movable contact 48 is connected to the movable contact plate 5 as shown in FIG.
7, consisting of a contact frame 58, a contact pressure applying spring 59, and a movable contact 47; a movable contact plate 57 and a contact frame 58;
are pivotally connected at the upper part by a pin 60, and a contact plate 57 is connected at the upper side of the pin 60 as shown in FIGS. 7 and 10.
A contact pressure applying spring 59 is installed in a compressed state between the contact frame 58 and the upper end of the contact frame 58 . 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 latch link 64, which will be described later, by a pin 63 above the pothole 62 at the lower end of the contact frame 58, so that the movable contact 48 is
7 faces the fixed contact 46.

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. First yoke 6
5 consists of a U-shaped frame 72 and a backing plate 73.
is installed and fixed between the upper piece 74 and the lower piece 75 on the opposite side of the vertical piece 72a of the U-shaped frame 72 by fitting and caulking the protrusion 76 and the square hole 77. This yoke 65 is integrally formed with a frame 79 of a crosspiece 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 is formed on the other side edge of the upper piece 74. 81 is formed, the square hole 83 at the lower end of the opposing side plate 82 is fitted, and the side plate 82 is erected by caulking.
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 cutout recesses 86 formed in both side plates 80 and 82, and a shaft 88 is passed through the recess 86 to support the frame 79. One end of the shaft 88 is connected to the side plate 1a of the case 1, and is located above the arc extinguishing chamber 51. A presser tube 89 is fitted into the bottomed mounting hole 87 (FIG. 5), and the other end is formed inside the lid 2 as shown in FIG.
fitted inside. At this time, the side plate 82 is pushed by the opening edge of the holding tube 89 to support the side plate 80 on the side plate 1a of the case 1. 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, thereby determining the posture of the yoke 65. The fixed core 68 has a through hole 92, and a hole 93 formed in the vertical piece 72a of the U-shaped frame 72.
The movable rod 71 is fitted from the inside and fixed by caulking, and the movable rod 71 is inserted through the through hole 92. Coil tube 6
7 has a small diameter portion 94 at one end, and this 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 erection. The plunger 70 is slidably fitted into the coil tube 67, and a forced opening rod 96 protrudes from one end thereof.
protrudes outward from the small diameter portion 94 of the coil tube 67,
A collar 97 is formed at the tip thereof, and passes through the large diameter side of the pothole 62 of the movable contact plate 57 facing the fixed contact 46, 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 one end of the coil 66 is welded to a flexible copper stranded wire 98, and its 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 them increases, and the plunger 70 is attracted to the fixed iron core 68 by overcoming the force of the spring 69, and the plunger 70 operates. As a result, the movable rod 71 is pushed by the plunger 70 and the vertical piece 72a of the U-shaped frame 72
The collar 9 of the forced opening rod 96 protrudes further outward.
7 engages with the small diameter side of the pothole 62 and operates 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 is
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.
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 frame 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 operating link 110, a handle 111 and an operating 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 pivoted to 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 and the upper end of the trip link 109 intersect, 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 48 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 130. 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 includes a plunger linking rod 1 which serves as an operating part as shown in FIGS. 10 to 13.
Place the bottom plate 4 of the case 1 with the side with the protruding 39 on top.
The upper end of the connecting rod 139 is connected to the plunger connecting hole 135 of the handle 111 by a pin 140, and the coil end 141 is inserted into the slit 14 in the upper part of the storage wall.
2 to the operating terminals 15 and 16. This electromagnet device 112 is of a polar type, and as shown in FIG.
A coil 147 is wound between the upper flange 14 and the upper flange 14.
A magnet box 148 is integrally formed on the upper part of the magnet box 6, and storage openings 149 and 15 are opened outward on opposite sides thereof.
0 is formed. Opening 1 in this coil frame 143
An inverted U-shaped yoke 151 is mounted on the yoke 151, leaving the 49 and 150 sides, and the bottom plate yoke 152 is applied to the lower end and caulked to the edge of the yoke 151. Plate plunger 1
53 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 can be slid freely inside. Also, connection rod 139
A circular part 156 is formed at the lower end, and the circular part 156 is inserted into the engagement hole 154 through the groove 155 so as to be able to swing freely in the plate width direction, and the upper end is inserted through the locking hole 158 formed in the upper piece 157 of the yoke 151. The handle 111 and the plunger 153 are protruded from each other, thereby making the interlock between the handle 111 and the plunger 153 smooth. Two permanent magnets 159 and 160 having magnetic poles N and S in the plate thickness direction are housed in openings 149 and 1.
50, and the ends of the protection plates 162, 163 are engaged with notches 161 formed on both sides of the opening edge and the yoke 151, and are attracted and held by the magnetic force of the magnets 159, 160. The magnetic poles N and S of the magnets 159 and 160 are housed so that the same polarity faces each other as shown in FIG.
160 individually create a magnetic path as shown by the arrow in FIG. Therefore, when the plunger 153 is in the lower position and approaches the yoke 152, and when it moves upward and approaches the upper piece 157 of the yoke 151, it is latched. Also yoke 15
A return coil spring 164 is compressed between the arm 134 of the handle 111 and the arm 134 of the handle 111. When the electromagnetic device 112 is not energized, the handle 11
1 is turned on or off, the linking rod 139 and the plunger 153 move up and down due to the force, and the permanent magnets 159 and 16 move as described above.
Since the upper and lower positions of the plunger 153 are held by the magnetic force of 0, the handle 1
11 on and off states are respectively maintained;
As a result, the movable contact 48 is held in a state in which it contacts the fixed contact 46 with contact pressure as shown in FIG. 13, and is also held in an open state as shown in FIG. 14.
In addition, in the on state shown in FIG. 13, the operation terminal 15,
When a pulse of unidirectional operating current is applied to 16, the magnetic flux of magnets 159, 160 is canceled, so plunger 153 is moved upward by return spring 164, and after the current stops, it is held by permanent magnets 159, 160. Ru. As a result of this operation, the handle 111 is turned off via the link rod 139, and the movable contact 48 is opened via the operation link 110. On the other hand, when a pulse of operating current in the opposite direction is applied to the operating terminals 15 and 16, the plunger 153 is pulled down by the magnetic force of the coil 147 from the state shown in FIG. Retained. This action rotates the handle 111 in the on direction, and the movable contact 48 is held in contact with the fixed contact 46 with contact pressure, turning 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.
3, the movable contact 48 rotates via the operation link 110 about the pin 138 of the handle 111 as a fulcrum, and the handle 111 and the electromagnet device 112 are rotated.
Trip-free operation is performed in which the movable contact 47 is opened from the fixed contact 46 without the plunger 153 operating.

The trip test button 165 is used to arbitrarily test the trip operation of the crosspiece 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. A return coil spring 169 is compressed within the groove 166 between the bottom 167 of the test groove 166 and the flange 168 of the test button 165 to bias the test button 165 upwardly. The lower end of the test button 165 faces the upper edge of the trip link 109. Therefore, when the test button 165 is pressed, the side piece 1 of the trip link 109 is pressed at its lower end.
Trip link 109 rotates to the right to push against arcuate surface 120 (FIG. 11) of 14, thereby releasing engagement with latch link 64 and performing a tripping action.

The remote control type circuit breaker having the above configuration is closed and fixed by housing each component in the case 1 as described above and closing the lid 2.
At this time, the crosspiece groove portion 79 includes the electromagnetic device 44, the movable contactor 48, and the arc running plate 84, which perform instantaneous tripping operation.
Both can be stored in case 1 in one block. 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 operating electromagnet device 112
The plunger 153 assumes a horizontal attitude with respect to the ground and operates in the horizontal direction. Furthermore, this remote control type circuit breaker shows the structure for one pole; in the case of multiple poles, the same structure can be installed side by side on the side and connected to the connection holes A to C of the case and lid. They are connected together by passing a caulking pin through them. 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 Figure 18 for three poles,
Handles 111a to 111c for each case L ₁ to _{L 3}
The on-off interlocking rod 170 is passed through the interlocking rod hole 132, and the trip interlocking rod 171 shown in FIG. 19 is placed above the intersection of the trip link 109 and the latch link 64 as shown in the imaginary line in FIG. This trip linking rod 171 extends a latch link sensing arm 172 and a trip link tripping arm 173 that face the trip link 109 and latch link 64 of each pole, and has both ends connected to the cases L ₁ to _{L 3 .}
A sensing arm 172 is mounted on a latch link 64 that is rotatably supported on the side plate of the sensor and has a large rotation amount. For example, when an abnormal current flows through a single pole circuit and a trip occurs, the upper end of the latch link 64
7 causes the latch link sensing arm 172 to be pushed and rotated to the left in FIG. 7, which causes the trip arm 173 at each pole to rotate and push the trip link 109 in the trip 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. Further, the coils 147 of each pole of the operating electromagnet device 112 are connected in series, and the operating terminals 15,
16 is only for one pole as shown in FIG.
Therefore, when an operation signal is sent to the operation terminals 15 and 16, each electromagnet device 112 operates simultaneously to perform the same operation.

Next, we will summarize the operation of this remote control type circuit breaker. That is, the on state is shown in FIG. 17a and FIG. 13.
In this case, latch link 64 is trip link 1
09, the handle 111 is tilted to the right, and the movable contact 48 comes into contact with the fixed contact 46.
Also, the plunger 153 of the operating electromagnet device 112
moves downward and is held by the protruding piece 152 of the yoke 152 by permanent magnets 159 and 160. As described above, for this purpose, the handle 111 and the movable contact 48 are held in the on position. In addition,
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 the handle 111 remains held by the plunger 153, so the movable contact 47 separates from the fixed contact 46, and the electrical circuit is quickly cut off. 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. The latch portion 128 engages the hook portion 1 of the trip link 109.
It is latched at 19. Of course, operation terminal 15,1
6 may be applied to activate the electromagnetic device 112 to operate the 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 64 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 type circuit breaker of this invention has an operating terminal above the main terminal, so the width of the outer shell can be reduced by the operating terminal compared to the conventional example. The installation area can be reduced. Also, since the operation terminals are provided in a stepped manner on the shoulder of the outer shell, they do not interfere with the connection of the main terminals. Furthermore, since the operation terminals and the operation electromagnet device are provided close to each other, In addition to making interconnection easier, the operation terminal is located in the space between the upper side of the coil part of the operating electromagnet device and the side of the action part, so the extra space inside the outer shell can be effectively utilized. This has the effect that the breaker can be made smaller.

[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 contact, the electromagnet device, and the crosspiece structure, 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 a three-pole type circuit breaker, Fig. 19 is a perspective view of a trip linking rod, Fig. 20 is a plan view of a conventional example, Fig. 21 is a front view thereof, and Fig. 22 is another one. FIG. 7 is a cutaway plan view of a conventional example. 1...A case serving as an outer shell, 13, 14...Main terminals, 15, 16...Operation terminals, 112...Operation electromagnet device, 139...Plunger linking rod serving as an operating part, 143...Coil part Coil frame to configure.

Claims (1)

[Scope of utility model registration request] an outer shell, a main terminal provided at a slightly lower portion of both end walls of the outer shell, and a coil portion disposed inside the outer shell on either one of the end walls and located inside the main terminal. An operating electromagnet device having an operating part protruding above the coil part, and an operating electromagnet device located above the coil part of the operating electromagnet device in a space on the side of the action part, and having a stepped shape above the main terminal. and an operation terminal recessed in the upper part of the end wall of the outer shell so as to form a remote control circuit disconnector.