JPH0435866B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] This invention relates to a remote control type circuit breaker.

[Background technology]

Proposed examples of this invention are shown in FIGS. 1 to 22. That is, this proposed example includes a movable contact 48 having a movable contact 47 facing a fixed contact 46;
A manually operable handle 111 is linked by a link 110 so that the movable contact 48 opens and closes in a non-reversing manner as the handle 111 opens and closes, and also detects means 44 and 45 for detecting abnormal current. Trip link 1 that responds and drives
an opening/closing mechanism section 78 having a latch link 64 releasably engaged with the opening/closing mechanism section 78 and supporting the connection between the movable contact 48 and the handle 111 so as to be releasable by detaching the latch link 64; It has a plunger 70 that operates in conjunction with the handle 111, and the plunger 70 is attracted to the armature of one or the other of the stationary yokes 148, 150 by the magnetic force of the permanent magnet 149, and is A bistable polar electromagnet device 112 moves the plunger 70 by canceling or superimposing the magnetic force generated in the coil 147.

According to this proposed example, the open/closed position of the movable contact 48 can be held by the magnetic force of the permanent magnet 149 of the bistable polarized electromagnet device 112, so the conventional toggle-type holding mechanism is not required, and the holding mechanism is not required. Since the capacity to remove the mechanism is no longer required, even if the electromagnet is bistable, the overall size can be reduced, and the operating power can be further reduced.
In addition, since the plunger 70 of the bistable polar electromagnet device 112 is in a stable position, the attractive force by the permanent magnet 149 becomes large, so that the opening/closing position is reliably held and stable opening/closing can be ensured.

A more detailed explanation will be given below with reference to the drawings. First, let me explain the structure of one pole.This is a 30 ampere frame type that detects line overcurrents and short circuit currents and trips, and also turns the line on, off, and reset using the handle and remote control operation signals. I am able to operate it.

The outer shell (the cutter main body) A mainly consists of a main case 1, a middle case 2, a side case 3, and an upper cover 4 as shown in FIG. A middle case 2 with a top plate 11a and a standing plate 11b that are almost closed is placed on the middle case 2, and a side case 3 is placed on the outer surface of the middle case 2 to connect the three connection holes 5 to 7 of the main case 1 and the side case 3. They are assembled together by eyelet pins 8 that pass through, and the inner case 2 is held between them. The upper cover 4 is made of elastic plastic and is attached to mounting walls 9, 10 stepped at the upper ends of the main case 1 and side cases 3, and to both end edges of the top plate 11a of the middle case 2. By extending the terminal cover 12 further outward and forming a thin wall 12a at the base thereof, a hinge portion 13 that can be elastically rotated upward is formed. By combining in this way, a flat box-shaped outer shell A is constructed, and the shoulders on both sides in the width direction of the outer shell A are tapered into tapers 14, and the both sides of the outer shell A have step-like stepped portions 15. - 18 are formed by the main case 1 and the inner case 2, and the main case 1 has a mounting groove 19 formed at the lower end of the outer shell A for attaching a cutter or disconnector to a distribution board or the like.

The terminals are mainly the main terminal 2 for the electrical circuit as shown in Figure 7.
0, 21, an operation terminal 22 for remote control operation signals, and an auxiliary terminal 23, and the main terminals 20, 21 consist of a power supply side terminal device 21 and a load side terminal device 20. These terminal devices mainly consist of terminal plates 24, 25, a washer 26 with a presser protrusion, a spring washer 27, a square nut 28, and a terminal screw 29 as shown in FIG.
A screw through hole 30 is formed in the terminal screw 29, and the washer 27 and washer 26 are passed through the terminal screw 29.
is passed through the screw through hole 30 and screwed into the nut 28 on the lower surface. Each terminal plate 24, 25 has one side edge bent downward to form a hanging piece 31, 32, and each terminal device 20, 21 has a lower stepped portion 15 on both sides of the outer shell A, 16. Therefore, these stepped portions 15 and 16 have screw/nut loose insertion grooves 33 that open in the upper surface and in the lateral direction of the main body case 1.
and hanging piece insertion slits 34, 35 are formed. Insert each terminal device 20, 21 into the stepped portions 15, 16 from the opening side of the main body case 1 as shown in FIG.
Pass the hanging pieces 31, 32 through the slits 34, 35,
The inner case 2 and the side case 3 are clamped by passing the terminal screw 29 and nut 28 through the groove 33 and closing the inner case 2 and the side case 3. For wiring, connect the electric wire (not shown) with washer 26.
and the terminal plates 24 and 25, and the terminal screw 29
This is done by tightening the terminal screw 29.

Further, the operation terminal 22 has a terminal screw 37 screwed into the upper part of the U-shaped terminal frame 36, and is composed of three pieces in consideration of three-wire remote control. The terminal device 21 is attached to the upper step 18 formed in the inner case 2 of the step 16 where the terminal device 21 is located, at a position partitioned by an insulating partition plate 38 . That is, a fixed slit 39 is formed in the stepped portion 18, and the three terminal frames 34 are inserted into the slit 39.
, and is clamped and fixed to the stepped portion 18 by the spring action of the terminal frame 36. Further, the auxiliary terminal 23 is provided on the upper step portion 17 on the load side terminal device 20 side. This auxiliary terminal 23 is for transmitting detection signals of on/off and trip operations of the circuit and disconnector to an external alarm lamp or buzzer. This is Z
A screw 41 is screwed into the lower piece of the letter-shaped terminal plate 40, and the insulating partition plate 42 of the second step 17 of the middle case
The upper piece 40a is inserted into the holding groove 17a to be held. The terminal cover 12 is located exactly on the upper surface of the operating terminal 22 and the auxiliary terminal 23, and when the disconnector is installed on a distribution board or the like and the upper surface is covered with a flash plate, the flash plate and the terminal Insulation between 22 and 23 can be ensured. Note that the connections to these terminals 22 and 23 are made by opening the terminal cover 12 upward.

The electrical circuit between the main terminals 20 and 21 mainly includes a contact portion 43, a plunger type electromagnet device 44, and a bimetal 45 as shown in FIG. Arranged. The contact section 43 controls 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, a partition plate 50 having a height of about 1/3 of the height of the main body case 1 is erected at the center of the bottom plate 49 of the main body case 1 to open the lateral side of the main case 1. When viewed from above, the arc extinguishing chamber 51 is formed on the left side, the operating electromagnet storage chamber 52 is formed on the right side, and the fixed contact plate 53 is bent into an inverted U shape along the surface of the partition plate 50. It is pushed in while being guided by the partition plate 50 from the lateral opening side, and positioned by abutting the back end of the width plate 54 provided at the end on the storage chamber 52 side against the back surface of the main body case 1 when viewed from the lateral opening side. Ru. The fixed contact 46 is fixed to the arc extinguishing chamber 51 side of the fixed contact plate 53. Further, a slit 55 is formed in the lower part of the storage chamber 52 between the width plate 54 of the main body case 1 and the hanging piece 32 of the terminal plate 25, and a stranded copper wire 56 or a conductive plate is inserted into the slit 55. As shown in FIG. 7, the width plate 54 and the hanging piece 32 are connected by welding. The movable contact 48 consists of a movable contact plate 57, a contact frame 58, a contact pressure applying spring 59, and a movable contact 47, as shown in FIG. As shown in FIGS. 7 and 11, a contact pressure applying spring 59 is installed in a compressed state between the contact plate 57 and the upper end of the contact frame 58 at a position above the pin 60. 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. This movable contact 48 has a pin 63 passed through a support hole 61a above the pothole 62 at the lower end of the contact frame 58, and is pivotally supported by a latch ring 64, which will be described later, as shown in FIG. The movable contact 47 faces the fixed contact 46.

The plunger type electromagnet device 44 is a detection means for detecting short-circuit current, and is mainly used for the yoke 6 as shown in FIG.
5, a coil 66, a coil tube 67, a fixed iron core 68, a return spring 69, a plunger 70, and a movable rod 71. First York 65
consists of a U-shaped frame 72 and a backing plate 73, and the backing plate 73 is formed by fitting and caulking a protrusion 76 and a square hole 77 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. Erection is fixed. This yoke 65 is integrally formed with 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 the other side of the upper piece 74 and the standing piece 72a A protrusion 81 is formed on the frame 7.
The square holes 83 of the opposite side plate 82 of No. 9 are fitted and caulked to stand the opposite side plate 82 facing the one side plate 80. 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. The frame 79 is arranged such that the lower piece 75 of the yoke 65 is placed on the support base 1a provided on the main body case 1, and the arc travel plate 84 is positioned on the lower surface of the support base 1a to sandwich the support base 1a. Two pins 87, 8 forming a mechanism section 78, which will be described later.
8 is the support hole 89, 9 of the main case 1 and the middle case 2.
These pins 87 and 88 are passed through the holes 91 and 92 of the frame 79, and the frame 79
is held, and the frame 7 is held on the side of the middle case 2.
9 (FIG. 9), and the postures of the yoke 65 and the frame 79 are determined by these. The fixed iron core 68 has a through hole 68a, and a hole 93 formed in the vertical piece 72a of the U-shaped frame 72.
The movable rod 71 is longer than the fixed core 68 and is fitted into the through hole 68a from the inside and fixed by caulking.
It is slidably inserted into the The coil tube 67 has a small diameter portion 94 at one end, and this small diameter portion 94 is connected to the backing plate 73.
It is fitted into a mounting hole 95 formed in , and the other end is fitted into a fixed iron core 68 for erection. plunger 70
is slidably fitted into the coil tube 67, and a forced contact opening rod 96 protrudes from one end thereof, protrudes outward from the small diameter portion 94 of the coil tube 67, has a collar 97 formed at its tip, and faces the fixed contact 46. It passes through the large diameter side of the pothole 62 of 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 rigidity due to its large wire cross-sectional area, and the hole of the coil 66 is inserted into the coil tube 6.
7, and one end thereof is folded back in the axial direction to form the hanging piece 3 of the terminal plate 24 of the load side terminal device 20.
1 is welded. With such a configuration, in this electromagnet device 44, 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. The magnetic flux between the fixed iron core 68 and the plunger 70 increases, and the force of the return spring 69 is overcome, the plunger 70 is attracted to the fixed iron core 68, 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 end 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 is a detection means for detecting overcurrent, and its main body is made up of two thin plates with different coefficients of thermal expansion that are polymerized together, as shown in FIGS. 7 and 11.
It is bent into a substantially L shape consisting of a horizontal piece 98 and a diagonal piece 99, and a gap adjustment screw 10 is attached to the upper end of the diagonal piece 99.
0 and caulk the hole in the horizontal piece 98 (not shown)
is formed and caulked to the lower end of the side plate 82 of the frame 79 (welding may also be used). The other end of the coil 66 and the upper end of the bimetal 45 are welded together using a flexible copper stranded wire 101. And the side plate 82 of the frame 79
and the upper end of the movable contact plate 57 are the flexible copper stranded wires 1
02, and when a current flows between the copper stranded wire 101 and the coil 66, it is heated by its own Joule heat, and since the high expansion side is located on the terminal device 20 side, the diagonal piece 99 moves away from the terminal device 20. bend The curved operation is set to operate with an overcurrent several times the rated current.

From the above configuration, the electric circuit is sequentially formed from the power supply side terminal device 21 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 20 via the copper stranded wire 102, the side plate 82 of the frame 79, the bimetal 45, the copper stranded wire 101, and the coil 68. Opening and closing are controlled by the contact portion 43. Further, the arc extinguishing chamber 51 is designed to extinguish the arc generated in the contact portion 43 in the event of a short circuit or disconnection by quickly separating it from between the contacts 46 and 47. Exhaust port 103 at the bottom of the terminal device 20
The arc travel plate 104 is continuously extended from below the fixed contact 46 of the fixed contact plate 53 to form an arc extinguishing chamber 5.
1 along the partition plate 50 and bottom plate 49,
This is placed opposite the upper arc traveling plate 84, and the exhaust port 1
A de-ion grid 105 is placed between the arc traveling plates 84 and 104 inside the de-ion grid 105, and an exhaust plate 106 with many holes is erected on the back side of the de-ion grid 105, and is also fixed to the de-ion grid 105. Arc-extinguishing side plates 107 are provided on both sides between the contact plates 53 to protect the main case 1 and the inner case 2 from arcs and to form a return path for arc gas. Furthermore, a protruding rib 108 is provided on the center line of the arc travel plate 104 from the fixed contact 46 to the deion grid 105 to facilitate arc travel and avoid sticking. The operation of the arc extinguishing device as described above is as follows:
When an arc occurs between the contacts 46 and 47 due to the opening of the contact plate 53, the current path containing the arc is
Since the fixed contact 46, the arc, 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 105 is generated.
As a result, the arc leaves the contacts 46 and 47 and travels on the arc running plates 84 and 104, and when it approaches the de-ion grid 105, it is attracted and enters the de-ion grid 105. The gas is divided and cooled to extinguish the arc, and the gas is exhausted from the exhaust port 103 through the exhaust plate 106. 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 includes a trip link 109, a latch link 64, an operating link 110, and a handle 111, as shown in FIGS. 11 and 12.
and an operating electromagnet device 112. The trip link 109 consists of a vertical piece 113 and a side piece 114 integrally connected at the intermediate part of the vertical piece 113, as shown in FIG. A shaft hole 116 is formed in the ear piece 114 and the ear piece 115, and the bimetal 45 of the side pieces 80 and 82 of the frame 79 is connected by a pin 87.
It passes through a hole 91 at the side end, and both ends are pivotally supported in support holes 89 formed in the main case 1 and the middle case 2. As shown in FIG.
The upper end portion is located in front of the gap adjustment screw 100 of the bimetal 45. 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 . This trip link 10
A torsion coil spring 121 for return is attached to the pin 87 of 9.
is fitted and supported, and its one end 121a is connected to the side piece 11.
4, and the other end 121b is fixed to the lower edge of the yoke 6.
The trip link 10 abuts and locks on the upper piece 74 of 5.
9 in the counterclockwise direction as shown in FIG.
The lower end of 13 contacts the movable rod 71 and the fixed iron core 6
It is designed so that it can be locked on the protruding surface of 8. The latch link 64 is made up of a pair of elongated side pieces 122, 123 facing each other, the left side edge of the upper end (FIG. 12) is connected by a latch bridging piece 124, and the side pieces 122, 123
Pass the pin 88 through the hole 125 in the middle part of the frame 79, pass the pin 88 through the hole 92 on the movable contact 48 side of the side pieces 80, 82 of the frame 79, and then insert both ends into the support holes of the main case 1 and the middle case 2. It is centered at 90. A return torsion coil spring 12 is attached to the pin 88.
7 is supported, and one end 127a of the yoke 65 is supported.
The other end 127b is fixed to the upper piece 74 of the side piece 12.
2, 123, and its spring action urges the latch link 64 to rotate clockwise in FIG. I have to. The upper end of this latch link 64 and the upper end of the trip link 109 intersect, and the latch portion 12 at the lower end of the bridging piece 124
8 is located above the hook portion 119 of the trip link 109 in the rotating direction. Therefore, when the latch link 64 is rotated to the left against the spring force of the torsion coil spring 127, the latch portion 128 slides on the arcuate surface 120 of the trip link 109, causing the trip link 109 to move to the right against the spring action. When rotated, the latch portion 128 locks onto the hook portion 119. As a result, the trip link 109 and the latch link 64 are reset, and the posture of the trip link 109 becomes the detection position of the bimetal adjustment screw 100 and the movable rod 71 by the vertical piece 113. Then, when the trip link 109 operates, the latch link 64 is released and released, resulting in a trip state. The pin 63 supporting the movable contact 43 is connected to the hole 1 at the lower end of the latch link 64.
29. A counter plate 126 is integrally formed with the main body case 1 above the contact plate 53, facing the caulking protrusion 76b of the lower piece 75 of the yoke 65, and the contact plate 57 is suspended between the two. is the maximum distance at which the contact plate 57 can rotate, thereby preventing the arc from moving upward.

The handle 111 is made of an insulating material and has an eleventh
As shown in the figure, it is inserted into the handle groove 130a formed slightly to the right of the center of the top plate 11a of the inner case 2 and the handle hole 130b of the upper cover 4, and is inserted into the main case 1 and the inner case by a shaft 131 at the bottom of the handle hole 130b. It is rotatably supported between the holes 131a of the case 2. This handle 111 has operation unevenness 111a formed on both sides of the portion protruding from the upper cover 4 in the rotational direction, and an arc plate-shaped ON display plate 111b (with "ON" written on the surface) on both sides of the lower side of the upper cover 4. display) and an off display plate 111c (displaying "OFF" on the surface), and a connecting hole 133 is provided at the lower end of the handle 111 with the shaft 131 in between.
(FIG. 13), and further, as shown in FIG.
Figure). In this way, the handle 111
is in the on position as shown in Figure 14, the handle hole 1
30b, the word "ON" on the on display board 111b can be read, and when the handle 111 is in the off position as shown in FIG. 15, the word "OFF" on the off display board 111c can be read from the handle hole 130b. You can check whether it is on or off. The operation link 110 is an H-shaped flat plate with both sides bent in the same direction, and consists of both side pieces 136 and a bridging piece 137. One end of the both side pieces 136 is connected to the connecting hole 133 by a pivot pin 138, and the other a pivot pin 60 whose end supports the movable contact plate 57 and the contact frame 58;
connected to. The posture of the handle 111 in FIG. 14 (tilted to the right) is in the on state, and by tilting to the right in this way, the operation link 110 is pushed, the movable contact 48 is pushed, and the latch link 64 is latched to the trip link 109. Therefore, the movable contact 48 rotates around the pin 63, and the movable contact 4
7 contacts the fixed contact 46. Furthermore, handle 1
11 to the home position, since the movable contact 47 is in contact with the fixed contact 46, the movable contact plate 57
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. 15 shows the handle 111 in the OFF state (tilted to the left), the movable contact 48 is also connected to the pivot pin 63 of the latch link 64.
When the handle 111 is tilted to the left, the operating link 110 is pulled, and the operating link 11
0 pulls the upper end of the movable contact 48, so the movable contact 47 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 the spring 127 is released.
Since the latch link 64 rotates about the pin 126 as a fulcrum, the latch link 64 is in the state shown in FIGS. The latch link 64 is pulled up as a whole to the side, so that the latch link 64 supports the spring 1 with the pin 126 as a fulcrum.
The latch part 1 rotates to the left against the spring force of 27.
28 slides on the arcuate surface 120 of the trip link 109 and is engaged with the hook portion 119.

The trip display device 139 displays a trip when a trip operation is performed due to an abnormal current, and consists of a display link 139a and an interlocking link 139b as shown in FIG. Display link 1
39a has a lower end pivotally supported by the handle shaft 131,
An arc-shaped trip display board 139c ("TRIP" is displayed on the surface) is provided at the upper end.
The interlocking link 139b has both ends bent in the same direction to form an axis, and the display link 139a and the latch link 6
It is connected to the upper end of 4. This trip display device 139 is located in a position retracted from the off position of the handle 111 when the latch link 64 is in the reset state as shown in FIGS.
When the latch link 64 becomes tripped, the latch link 64 rotates clockwise, and the interlocking link 139b
Press to rotate the display link 139a and move the trip display plate 139c to the ON display plate 1 of the handle 111.
11b (the handle 111 is always in the on position during the tripping operation). As a result, when viewed from the handle hole 130b, the word "TRIP" on the trip display board 139 can be read, and the display "ON" is hidden.

The operating electromagnet device 112 is inserted into the storage portion 52 in an upright position with respect to the bottom plate 49 of the main body case 1 with the side from which the plunger 140 is projected as the top, as shown in FIGS. 11 to 14, and the plunger 1
40 is connected to the plunger connecting hole 135 of the handle 111 via a U-shaped pin 141. This electromagnet device 112 is a bistable type polarized electromagnet device, and as shown in FIG.
3 through the square hole 144, and the upper and lower flanges 145,
A coil 147 is wound between the coil frames 14 and 146.
A pair of inner yokes 148 are fitted to the left and right sides of 3 with an upper piece 148a and a lower piece 148b that serve as armatures,
Flanges 145 and 146 are formed on both sides of the yoke 148.
A pair of permanent magnets 149 magnetized in the plate thickness direction are attached to the outer surface of the inner yoke 148 (the magnetic poles are indicated by N and S), and a pair of outer yokes 150 are attached to the outside of the permanent magnet 149. Adsorb each. The plunger 140 slidably passes through the square hole 144 of the coil frame 143, and flanges 151 and 152 are provided between the inner yoke 148 and the outer yoke 149 at the upper and lower ends thereof, and the connecting portion 153 is provided on the upper surface of the flanges 151. An engagement hole 153a protrudes and bears the U-shaped pin 147 at the upper end of the connecting portion 153.
is formed. A buffer plate 154 is interposed between the lower ends of the outer yoke 150 and the plunger 140
We are providing buffers during transportation. Since the magnetic poles N and S of the permanent magnet 149 have the same polarity facing each other as shown in FIG.
Magnetic poles S appear on 48a and 148b, and magnetic poles N appear on the upper and lower ends of the outer yoke 150, which are the armatures, and face each other. Therefore plunger 14
Both ribs 151 and 152 of 0 are shown in FIG.
In any position shown in Fig. 5, it is attracted and latched. In addition, the coil frame 143 and the handle 1
A return coil spring 155 is compressed between the handle 111 and the arm 134 of the handle 111, and its spring force is weaker than the attraction force of the plunger 140, but when the handle 111 is turned off manually or by the magnet device 112, this spring action is activated. The contacts 46 and 47 are opened vigorously. In this electromagnet device 112, when the handle 111 is manually turned on or off in a non-energized state, the plunger 140 moves up and down by the force, and as described above, the magnet of the permanent magnet 149 moves the plunger 140 up and down. Since the handle 111 is held in the on and off positions, the movable contact 48 is held in the fixed contact 4 as shown in FIG.
6 with a contact pressure, and is also held in the open state shown in FIG. 15. On the other hand, there is a 21st
A pair of rectifier diodes 156 and 15 as shown in the figure.
7 and a switching contact portion 158 are interposed and connected to each other, so that this electromagnet device 112 can be driven by alternating current. That is, these parts fit into the recess 1 formed on the side of the middle case 2 between the middle case 2 and the side case 3.
59. First, the U-shaped fixed contact plate 160
is fitted into the fixed protrusion 161, and the pair of switching contact plates 162 and 163 are supported in a sandwiched manner by the slits 165a and 165b of the support protrusion 164 facing the fixed protrusion 161, and the upper and lower surfaces of the fixed contact plate 160 is in contact with. Further, an arcuate hole 166 is formed between the fixed protrusion 161 and the support protrusion 164,
A switching contact drive bar 167 integrally formed on the side surface of the arm 134 of the handle 111 passes through the circular arc hole 166 and is located between the switching contact plates 162 and 163, so that the handle 111 is in the ON position (FIGS. 8 and 14). , the lower switching contact plate 163 is opened from the fixed contact plate 160, and the handle 111 is placed in the OFF position (FIG. 15).
This opens the upper switching contact plate 162.
Then, connect the fixed contact plate 160 as shown in Figure 21.
The end of the coil 147 is connected to one operating terminal 22, and the diodes 156, 157 are connected to a pair of movable contact plates 162, 163 so that the polarities are opposite to each other. It is connected to terminal 22. In Figure 21,
167 is an AC power supply, and 168 is an external changeover switch. In this way, for example, when the external changeover switch 168 is turned on, a unidirectional current flows through the diode 156 to the coil 147, and the plunger 140 is moved from the upper position in FIG. 15 to the lower position in FIG. 14 and held there. . At this time, the drive lever 167 rotates downward, the movable contact plate 162 comes into contact with the fixed contact plate 160, and the movable contact plate 163 separates from the fixed contact plate 160, resulting in the state shown in FIG. 21b. Therefore, when turning off, switch the external changeover switch 168 to the off side, and the coil 147 is energized in the opposite direction, driving the plunger 140 upward and driving the handle 111 to the off position.
A lever 167 switches between movable contact plates 162 and 163. Furthermore, in the trip state described above, the first
6 and 17, the latch link 64 is released from the trip link 109 and its spring 1
27, the movable contact 48 rotates around the pin 138 of the handle 111 via the operation link 110 due to the rotation of the pin 63, and the plunger 1 of the handle 111 and the electromagnet device 112 rotates.
Trip-free operation is performed in which the movable contact 47 is opened from the fixed contact 46 without the contact 53 operating.

The above is a case of a three-wire system, but in the case of a two-wire system, as shown in FIG.
0 may be provided, and the operating principle is the same as that of the 3-wire system. Of course, the electromagnet device 112 can be driven by further applying a DC voltage.

The trip test button 171 is used to arbitrarily test the trip operation of the mechanism section 78. That is, as shown in FIGS. 7 and 11, a button hole 172 and a mounting groove 173 are formed on the left side of the handle 111 of the inner case 2 and the upper cover 4,
A test button 171 is inserted into this through the side opening of the inner case 2, and is rotatably supported by a shaft portion 174. This test button 171 has a fixed arm 173a extending in the rotation direction within the mounting groove 173, and the fixed arm 173a is positioned in the horizontal groove 175 of the mounting groove 173, and the fixed arm 173a By elastically locking the protrusion 177 at the tip of the test button 177, the test button 177 is fixed, and when the test button 171 is rotated to the left in FIG. The lower end 171a of the test button 171 faces the front side of the upper edge of the trip link 109. Therefore, when the test button 171 is rotated, the lower end of the test button 171 pushes the side piece 114 of the trip link 109, causing the trip link 109 to rotate to the right, thereby releasing the engagement with the latch link 64.
A tripping operation is performed.

The option switch 178 is used for external alarms, etc., and is installed in a recess 179 formed on the side of the middle case 2 between the middle case 2 and the side case 3, as shown in FIG. This recess 179 and the recess 159 in which the diodes 156 and 157 are located are formed by the difference between the width space occupied by the electromagnet device 112 and the width space occupied by the mechanism section 78 and the handle 111. This option switch 178 is connected to the auxiliary terminal 23, and is activated by detecting the tripping operation of the latch link 64 of the mechanism section 78 by a member 178a.

The remote control type circuit breaker with the above configuration houses each component in the outer shell A as described above, and the mechanism section 78 includes an electromagnetic device 44 that performs an instantaneous tripping operation, a bimetal 45, a movable contact 48, The arc traveling plate 84, handle 111, remote control electromagnet device 112, and trip display device 139 are housed in a one-block main body case 1. Further, this shear disconnector is used with the bottom plate 49 of the main body case 1 attached to the vertical mounting surface.
At this time, the plunger 1 of the operating electromagnet device 112
40 assumes a horizontal posture with respect to the ground and moves 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 is installed side by side on the side and the caulking pins are passed through the connecting holes 5 to 7. This allows them to be connected together. In the case of three poles, the first
As shown in Fig. 9, instead of the upper cover 4, a three-pole upper cover 180 is placed over the three pole disconnectors, and three single-pole pole disconnectors are simply arranged in a distribution board or the like. In order to distinguish it from the other poles, only one handle hole 181 and one trip test button hole 182 are opened, the protrusion that becomes the knob of the handle of the other pole is removed, and the test button 171 is removed. In addition, in the case of multi-pole, one on/off interlocking rod for handle interlocking and trip interlocking.
83 and trip interlock rod 184 are applied.
The trip linking rod 184 shown in FIG. 20 penetrates each pole through a through hole 185 formed in the frame 79 inside the intersection of the trip link 109 and the latch link 64 as shown in FIG. A latch link sensing protrusion 186 and a trip link tripping protrusion 187 that face each other extend out, and both ends are rotatably supported by the side plates of the outer shell. For example, when an abnormal current flows in the circuit of one pole and causes a trip operation, the upper end of the latch link 64 is rotated upward by the spring 127, which pushes the latch link sensing protrusion 186 and rotates to the left as shown in FIG. The tripping protrusion 187 rotates and the tripping link 1
Push 09 in the tripping direction. As a result, the other poles also trip at the same time. On the other hand, the on/off interlocking rod 18
3 is a hole 183a at the display board position of each handle 111.
are formed and interlocked with each other, so that when the handle of one pole is turned on or off by hand or by the electromagnetic device 112, 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 terminal 22 is only for one pole.
By sending an operation signal to the operation terminal 22, the electromagnetic devices 112 can work simultaneously to perform the same operation.

Next, the operation of this remote control type circuit breaker will be summarized. That is, the on state is shown in FIG. 18a and FIG. 14. 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 140 of the operating electromagnet device 112 is moved downward and the permanent magnet 149 Retained. As described above, for this holding, the handle 111 and the movable contact 48 are held in the on position. Note that this on operation is performed using the handle 111.
There are cases in which the plunger 140 is directly operated, and cases in which a signal is sent to the operation terminal 22 to drive the plunger 140 downward.

The off state is shown in FIGS. 18b and 15. As before, the latch link 64 is latched and the handle 111 is tilted to the left, so that the movable contact 4
8 is an open state. In addition, the operating electromagnet device 1
Twelve plungers 140 are moved upward 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. 18c and FIG. 16. That is, the first
When an overcurrent flows through the electric circuit in the ON state shown in FIG. 4, 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 140, the movable contact 47 separates from the fixed contact 46, and the electric path is finally severed. As described above, the reset after tripping occurs when the handle 111 is turned to the OFF position from the state shown in FIG. rotates 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. 18d and 17. That is, in the on state, when a short circuit current flows through the electric circuit, the plunger 9 of the electromagnetic device 44
6 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, before the movable contactor 48 is opened by such link interlocking, that is, at the exact same time as the plunger 70 operates, the collar 97 of the forced opening rod 96 engages with the contact plate 57 and pulls it. The movable contact 47 is connected to the fixed contact 4
Separate from 6. That is, the latch link 64
Just before the contact plate 57 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.

In these tripping operations, when the latch link 64 rotates, the display link 139a rotates,
A trip display board 139c is located on the upper surface of the ON display board 111b to perform a trip display.

The above proposed examples had the following drawbacks. That is, in this proposed example, the handle 111 and the movable contact 48 are linked together, and the plunger 70 of the bistable polar electromagnet device 112 is linked to this linkage. Therefore, the opening/closing position of the movable contactor 48 is adjusted to the bistable polarized electromagnet device 1.
Since the handle 111 is interposed when the bistable polar electromagnet device 12 is held, if the position of the handle 111 shifts even slightly, the force will affect the holding force or operating force of the bistable polar electromagnet device 112. In other words, the handle 111 is in a state where shaking is not allowed. For this reason, for example, when using a multi-polar remote control type circuit switch or disconnector in which a plurality of operating handles 111 are arranged in parallel and connected, if the opening and closing positions of both handles 111 are misaligned,
There is a risk that force will be applied to the handle 111, affecting the holding force or operating force within the bistable polarized electromagnet 112, changing the impression received from the remote signal, or causing a change in contact pressure to the movable contact. It was hot.

[Purpose of the invention]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a remote-controlled circuit breaker that allows some play in the operating handle.

[Disclosure of the invention]

The present invention comprises a plunger that can be driven by excitation of a coil, an operating electromagnet device that is self-retaining at both end positions in its operating direction and can be released by a predetermined force, and a tripping member that responds to a detection means that detects abnormal current. a movable contact having a latch member that engages with the plunger and a movable contact opposite the fixed contact supported by the latch member so that the movable contact opens and closes in response to the plunger; an opening/closing mechanism section that links the movable contact and opens the movable contact when the latch member is disengaged by the operation of the tripping member; and an operating handle that is engaged during linkage with the movable contact.

According to the configuration of the present invention, the movable contact and the plunger of the operating electromagnet device are linked and the opening/closing position of the movable contact is held by the operating electromagnet device, thereby achieving miniaturization and reducing operating power. be able to. In addition, since the operating handle is movably engaged with the plunger during the linkage between the plunger of the operating electromagnet device and the movable contact, it is possible to provide some play, for example when using a multi-polar type. Even if there is a slight misalignment of the handle, variations in performance can be reduced.

An embodiment of this invention is shown in FIGS. 23 to 28. In other words, this remote control type circuit disconnector can be roughly divided into the container body 201 and the terminal 2.
02a, 202b, an opening/closing mechanism section 203, a bistable electromagnet 204, and a detection bimetal 205. The container body 201 consists of a main body 206 that has an opening on the side and parts are fitted sideways, and a cover 207 that opens the opening, and has four rivets 2.
They are fixed together by 08. 201a is a mounting groove. Terminals 202a and 202b are terminal board 20
9, a power terminal 212a and a load terminal 212b, which are each constructed of a terminal screw 210, a terminal nut 211, and a dowel 212, and are installed at both ends of the container body 201, respectively.

In the opening/closing mechanism section 203, a mechanical frame 213 is formed into a substantially U-shape (when viewed from above) by caulking a caulking section 214, and handle support pieces 215 extend from the upper edges on both sides. It is fixed within the container body 201 by a shaft that will be described later. The fixed contact 216 constituting the opening/closing section is integrally formed with the terminal plate 209 of the load terminal 202b and supported on the inner wall surface of the container body 201, and a fixed contact 217 is fixed to the tip thereof. One movable contactor 218 has a contactor shaft 219 at its lower end, and the lower end passes through the mechanical frame 213 vertically, and bearing notches 220 are formed at both lower ends of the mechanical frame 213.
A contact shaft 219 is fitted into the contact shaft 219 , and a movable contact 221 is provided at the upper end, facing the fixed contact 217 . And the contact spring 222 is connected to the movable contact 218
and the end wall of the mechanical frame 213, and dowels 223, 224 are formed on each of them to prevent the contact spring 222 from coming off. This contact spring 222 biases the movable contact 218 to open. Movable contact 22 of movable contactor 218
1 and the spring support 224.
25, on which one end of the contact link 226 is pivotally supported, and on the other end of the contact link 226 a second
A shaft 227 is provided, to which a U-shaped connecting link 22 is provided.
8, and a third shaft 231 is provided in the other end hole 230 of the connecting link 228. Further, the upper piece 234 of the latch link 233 formed by bending the shaft rod into a U-shape is connected to the intermediate hole 232 at the lower part of the connecting link 228 adjacent to the second shaft 227, and the lower piece 235 of the latch link 233 is connected to the mechanical frame 213. It passes through a vertical slit 236 (perpendicular to the direction of rotation of the movable contact 218) formed in the vertical direction. trip link 2
37 has a locking part 238 on the top and a moving piece 2 on the side.
39, the trip link shaft 240 is passed through the middle part, and the trip link shaft 240 is inserted into the vertical slit 2 of the mechanical frame 213.
The trip link spring 24 is supported in the shaft hole 241 at the lower part of the spring 36 and is further formed of a torsion coil spring.
Pass the coil portion of No. 2 through the trip link shaft 240 and connect both ends to the mechanical frame 213 and the trip link 23.
7, thereby positioning the locking part 238 at a position where it intersects with the vertical slit 236 by appropriate means, and forming a guiding curved part 243 on the upper edge of the locking part 238 so that the lower part of the latch link 233 Piece 23
5 moves to the lower end of the vertical slit 236, the locking portion 238 is pushed open so that the lower piece 235 is latched. The handle 244 has a handle shaft 245 in the middle part, which is connected to the mechanical frame 21.
Pass it through the hole 246 of the handle support piece 215 of No. 3,
He is trying to rotate in the same direction as the movable contact 218. The tip of the handle 244 has a notched recess 247
and connect it to the end piece 22 of the connecting link 228.
8a and the operating portion 24 on the opposite side of the tip.
8 protrudes from the handle hole 249 of the container body 201. The mechanical frame 213 is fixed by positioning the protrusions at both ends of the shafts 240 and 245 in holes (not shown) in the vessel body 201.

The bistable electromagnet 204 includes a coil 251 wound around a coil frame 250, and a pair of U-shaped small magnet yokes 252a and 252 on both sides of the coil frame 250.
b are fitted, and the same polar sides (for example, N pole) of the permanent magnets 253a, 253b are attracted to the outer surface of each small yoke 252a, 252b, and the permanent magnets 253a, 2
A pair of U-shaped large yokes 254a and 254b are attached to the coil frame 250 so as to be attracted to the coil frame 53b by their magnetic force.
The plunger 256 is slidably inserted into the cavity of the coil frame 250, and the small yoke 252 of the plunger 256 is fitted into the protruding pieces 255a, 255b of the coil frame 250.
Armatures 257a and 257b are provided at positions between a and 252b and large yokes 254a and 254b,
One end of the plunger 256 is configured to protrude outward. The electromagnets 204 are fixed as a whole by being housed in the partition wall 258 of the container body 201 in this combined state. A terminal board 260 of a pair of operating terminals 259 is connected to both ends of the coil 251, and the terminal board 260 is installed above the power terminal 202a of the container body 201, and the terminal board 260 is provided with a terminal screw 261. Also plunger 2
56 is arranged to reciprocate approximately parallel to the rotating direction of the movable contact 218 when housed in the container body 201, and is inserted into the shaft hole 2 of the protruding end of the plunger 256.
56a is connected to the third shaft 231.
The operation of this bistable electromagnet 204 is such that the armatures 257a, 257b of the plunger 256 are in the states shown in FIGS. 24 and 27, and the yokes 252a, 252 are
b, 254a, 254b, a stable state is achieved by the permanent magnets 253a, 253b. That is, the plunger 256 is in the stable state on the protruding side (the second
4) and a stable state after retraction, and by energizing the coil 251 in one direction or the opposite direction, the operation is reversed from one of the stable states to the other.

The base end of the bimetal 205 is the power terminal 202a.
Welded to the terminal plate 209 (fixed by caulking is also acceptable).
An adjustment screw 262 is provided at the operating end, and the tip thereof faces the touch piece 239 of the latch link 237. Further, a flexible electric wire 263 such as a copper stranded wire is welded between the operating end and the shaft support side end of the movable contact 218, so that the power terminal 202a and the load terminal 202b are connected to the bimetallic wire 263.
05, connected by a flexible electric wire 263, a movable contact 218, a movable contact 221, and a fixed contact 217,
An internal circuit is configured.

The operation will be explained. First, the on state is the 24th
As shown, the lower piece 23 of the latch link 233
5 is latched to the latch link 237, and the plunger 256 of the electromagnet 204 is in the stable position on the protruding side. Latching of trip link 237 causes connecting link 228 to latch to latch link 233.
is pulled to a position where the second axis 227 approaches the plane containing the first axis 225 and the third axis 231,
The distance between the shafts 225 and 231 is the greatest, and due to their dimensional relationship, the movable contact 218 is pushed and the movable contact 221 comes into contact with the fixed contact 217. In this case, the contact link 2 is further moved by a predetermined amount from the position where the movable contact 221 contacts the fixed contact 217.
26 pushes the movable contact 218, the movable contact 218 is rotated about the movable contact 221 to compress the contact spring 222, and as a result, contact pressure is applied to the contacts 217 and 221. There is.
At this time, the contact shaft 219 has moved within the notch 220 to the extent shown in FIG. 24, floating above the inner end of the notch 220. Furthermore, in this on state, the handle 24
The handle 244 is in the on state when the position number 4 is tilted. This ON state is maintained by permanent magnets 253a and 253b of the electromagnet 204. The ON operation is performed by passing current through the coil 251 and moving the plunger 256 to the position shown in the figure, or by operating the handle 244.

In the off state, as shown in Fig. 27, the latch link 2
33 is latched, and the plunger 256 is held at a stable position on the backward side. As the plunger 256 retreats, the movable contact 218 opens. The operation is performed by energizing the electromagnet 204 from the on state to reverse the plunger 256, or by reversing the handle 244.

In the trip state, as shown in FIG. 28, when an overcurrent of more than a predetermined value flows through the electric circuit, the bimetal 205 bends to the low expansion side due to self-heating, and when the bimetal 205 bends by a predetermined amount, the adjustment screw 262 closes to the trip link 237.
A tripping operation is performed in which the locking portion 238 is released from the lower piece 335 of the latch link 233 by pushing the moving piece 239 of the latch link 233. As a result, the second shaft 227 is connected to the first and third shafts 22 by the action of the contact spring 222.
5,231 away from the plane containing the movable contact 21
8 performs the opening operation. At this time, since the plunger 256 remains fixed, the connecting link 228 is connected to the third
The handle 244 is rotated around the axis 231, and the handle 244 assumes a vertical position, and a trip display is displayed.

Note that the reset is in the state where the bimetal 205 has returned, so the trip link 237 is in the state where the spring 2
42, the coil 251 is energized to move the plunger 256 to the stable position on the backward side, and the handle 244 is turned to the off side. In addition, like the latch link 64 in the proposed example, the latch link 233 is connected to the movable contact 21 in the opening/closing mechanism.
8 may be used.

〔Effect of the invention〕

As described above, according to the remote control type circuit breaker of the present invention, the movable contact and the plunger of the operating electromagnet device are linked, and the open/close position of the movable contact is held by the operating electromagnet device. , it is possible to achieve miniaturization and reduce operating power. In addition, since the operating handle is movably engaged with the plunger during the linkage between the plunger of the operating electromagnet device and the movable contact, it is possible to provide some play, for example when using a multi-polar type. This has the effect of reducing variations in performance even if there is a slight misalignment of the handle.

[Brief explanation of drawings]

Fig. 1 is a plan view of a proposed example of the present invention, Fig. 2 is a side view thereof, Fig. 3 is a front view, Fig. 4 is a rear view,
Figure 5 is a side view of the main case, Figure 6 is a side view of the middle case seen from inside, Figure 7 is a side view with the middle case removed, and Figure 8 is a sectional view with the side case removed. , FIG. 9 is a partially cutaway plan view, FIG. 10 is a sectional view taken along the line X-X in FIG. 7, and FIG. 11 is an exploded perspective view.
Fig. 12 is an exploded perspective view of the movable contactor, electromagnet device, and mechanism, Fig. 13 is an exploded perspective view of the operating electromagnetic device and handle, Fig. 14 is a sectional view of the on state, and Fig. 15 is the off state. 16 is a sectional view of the tripped state due to the bimetal; FIG. 17 is a sectional view of the tripped state due to the electromagnetic device;
Figure 8 is an operating diagram, Figure 19 is a plan view of a three-pole type circuit breaker, Figure 20 is a perspective view of a trip linking rod,
Fig. 21 is a three-wire drive circuit diagram of the electromagnetic speed control device, Fig. 22 is a two-wire drive circuit diagram, Fig. 23 is a perspective view of an embodiment of the present invention, and Fig. 24 shows its on state. 25 is a perspective view with the container body removed, FIG. 26 is an exploded perspective view thereof, FIG. 27 is a sectional view in the off state, and FIG. 28 is a sectional view in the tripped state. 203... Opening/closing mechanism section, 204... Bistable type polarized stone device, 205... Bimetal serving as detection means, 21
7... Fixed contact, 218... Movable contact, 221... Movable contact, 233... Latch link which is a latch member, 237... Trip link which is a trip member,
244...Handle, 256...Plunger.

Claims (1)

[Scope of Claims] 1. An operating electromagnet device that self-holds a plunger that can be driven by excitation of a coil at both end positions in its operating direction and that can be released with a predetermined force, and that responds to a detection means that detects abnormal current. a latch member that engages with the tripping member; the plunger and the movable contact facing the fixed contact are supported by the latch member so that the movable contact opens and closes in response to the plunger; an opening/closing mechanism section linking a movable contact having the movable contact so that the movable contact can be opened by disengaging the latch member by operation of the tripping member; A remote controlled circuit breaker comprising a plunger and an operating handle engaged during linkage with the movable contact.