JPS6343795Y2 - - Google Patents

Description

[Detailed explanation of the idea]

This invention relates to a circuit or disconnection device having a closure jacket made of a molded insulator, and more particularly to an improvement of a circuit or disconnection device with an auxiliary switch in which a micro switch is attached to the outside of the closure jacket. Conventionally, this type of circuit breaker with auxiliary switch has often been formed by housing a microswitch within a closed jacket, but the storage space for the microswitch as an auxiliary switch is limited, making it difficult to store a large number of microswitches. Storage is becoming increasingly difficult as circuits and disconnectors tend to become smaller.
Therefore, attempts have been made to install a large number of micro-switches on the outside of the closure jacket, but this increases the installation space and the operating force required to operate the micro-switches puts a burden on the opening/closing mechanism of the circuit and disconnector. There was a problem in that it adversely affected the opening and closing operations of the breaker. Therefore, the main purpose of this invention is to enable the installation of a large number of microswitches, improve the installation space, and reduce the burden that the operating force required to operate the microswitches places on the opening/closing operation mechanism of the circuit and disconnector. The purpose is to In summary, this invention consists of a transmission lever whose middle part is rotatably supported on a fulcrum shaft, one end is linked to a contact crossbar that transmits the opening/closing operation of the contact, and the other end projects outside the closure jacket. At least one pair of microswitches are provided on both sides of the thin plate-like free end of the contact crossbar, and when the contact crossbar is in either the on position or the off position, the operation button of one of the opposing microswitches is in the operating state. It was designed to be biased toward Other objects, features and advantages of the invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings. One embodiment of this invention will be explained based on the drawings. The circuit breaker body 1 is formed into a box shape by a mold base 2 made of a molded insulator, a partial bottom cover 2' of the mold base 2, and a mold cover 3. The molded base 2 and molded cover 3 are formed with insulating partitions that cover all the live parts of the circuit and disconnector except the terminals, and house the main components of each pole and the operating mechanism. Each partitioned pole room 4
In addition, an opening/closing operation mechanism chamber 5 is provided adjacent to one side of each electrode chamber 4, and the opening/closing operation mechanism chamber 5 houses an opening/closing operation mechanism 5A, a tripping mechanism 5B, and a rated current adjustable mechanism 5C. . Regarding the common parts of each pole, only one pole will be explained for the sake of simplicity. As shown in FIG. 4, terminals 6, 6' are provided at both ends of each pole, and each terminal tap plate 6
It is made of a conductive material together with a and 6a', and is inserted and mounted in the mold base 2. The terminal conductive plates 7, 7' are connected to the terminals 6, 6',
The end wall of the storage groove of each electrode chamber is formed with electrode chamber end plates 4a, 4a' made of an insulating material. One end of a flexible lead 8 made of a conductive material is connected to one terminal conductive plate 7, and an introduction piece 6c extending inward from the end partition wall of the mold base 2 is connected to the adjacent terminal 6.
A movable arc horn 9 is connected to the inner tip thereof. A contact crossbar 10 made of a molded insulator penetrates from the opening/closing operation mechanism chamber 5 to each pole.
As can be seen from Figures 12a and 12b, it has two tongue-shaped contact holder members 10a for each pole integrally molded therein, and fitting grooves 10b provided in these contact holder members 10a. A protruding shaft 11a protruding from both wings of the movable contact rod 11 bent into a U-shape is fitted, so that the movable contact rod 11 is rotatably mounted between the two contact holder members 10a. ing. The contact spring 12 is connected to the contact crossbar 1
0 and the movable contact rod 11, and normally applies contact pressure to the movable contact rod 11 in a counterclockwise direction. In addition, movable contact rod 1
A flexible lead 8 from a terminal 6 is connected to 1, and a movable contact 13 is attached to the free end. The electromagnetic device 14 is located in the center along with its auxiliary devices, and includes a primary coil 15 and a secondary coil 16.
The primary coil 15 is composed of an insulated winding, and the cross-sectional area of the winding and the number of turns thereof are appropriately selected according to each rated current, and the number of ampere turns is selected to be constant with respect to the rated current. . Furthermore,
The secondary coil 16 is also made of an insulated winding and is wound inside the primary coil 15 via an insulator 17, and lead wires 16a and 16b are connected to the overcurrent response device 18. The cross-sectional area and number of turns of the secondary coil 16 may be constant regardless of the rated current. The fixed core 19 is formed into a block by laminating silicon steel plates, and is insulated from the secondary coil 16 by an insulator. That is, the secondary coil 16 is wound around the fixed core 19, and the primary coil 15 is further coaxially wound on the outside thereof. A yoke 20 made of several laminated steel plates is attached to both sides of the fixed core 19. The fixed core 19 and the yoke 20 form an H-shaped magnetic core, and this yoke 20 connects the primary coil 15 and the secondary coil. Next coil 16
A current transformer is constructed by surrounding the contact portion 20a, and is provided so as to extend over the contact portion 20a, the arc extinguishing chamber portion 20b, and the instantaneous tripping portion 20c. A yoke insulating plate 21 is attached to the inside of the yoke 20, and is formed in a large size so as to protrude from the outer periphery of a part of the contact portion 20a of the yoke 20 and the arc extinguishing chamber portion 20b. On the contact side of the yoke 20, a pair of corresponding yoke insulating plates 2
Engagement protrusions 22a provided on both sides of the fixed contact base 22 made of an insulating plate so as to close the space between the engagement holes 21a and 21d provided in the pair of yoke insulating plates 21 and yoke 20, respectively. A fixed contact base 22 is supported between the pair of yokes 20 . A fixed contact rod 23 made of a conductive material is bent into an L shape and held on a fixed contact base 22, has a fixed contact 24 at a position corresponding to the movable contact 13, and has a primary coil at one end. 15
The lead wire 15a is connected to the other end, and a stationary arc horn 25 made of a metal material is connected to the other end. The fixed arc horn 25 may be bent integrally with the fixed contact rod 23 or separately, and passes near the lower side of the primary coil 15 to the arc extinguishing chamber 2.
6 ends to form an end-bent engagement piece 25a.
is the tripping element housing partition wall 2a of the mold base 2.
It is engaged and supported by a fitting groove 26 provided in. An arc insulating plate 23a is attached to the fixed contact 23. Further, the fixed side arc horn 25 is provided so as to almost completely partition the gap between the pair of yoke insulating plates 21 provided correspondingly, and the arc extinguishing chamber 26
is isolated from the primary and secondary coils 15 and 16, and the overcurrent response device 18 is isolated by the partition wall 2a of the mold base 2. The arc extinguishing grid group 27, 27' is formed by a large number of magnetic plates 28, 28' housed in the arc extinguishing chamber 26, and is connected to the fixed side arc horn 25 provided horizontally below the primary coil 15. An arc extinguishing grid group 27 is arranged below, and an arc extinguishing grid group 27' is arranged next to the movable arc horn 9 provided at one end of the arc extinguishing chamber 26 toward the bottom wall of the mold base 2. An L-shaped intermediate arc runner 29 connects these movable arc horn 9 and fixed arc horn 2.
5 and arc extinguishing grid groups 27, 27' to strengthen the extinguishing magnetic flux. Fixed side arc horn 25 and intermediate arc runner 29
The arc extinguishing grid group 27, which is arranged horizontally between one side and the other, has a large number of magnetic plates 28 provided with inclined V-shaped notches 28a on the contact side for drawing the arc, as shown in FIG. They are arranged in parallel at equal intervals so that the left and right sides alternate. Further, an arc extinguishing grid group 27' arranged between the movable arc horn 9 and the other side of the intermediate arc runner 29 with a slight inclination towards the bottom wall of the mold base 2 is connected to a large number of magnetic plates 28'. As shown in FIG. 7, an arc drawing notch 28'a is provided on the contact side, and a notch 28'b is provided on the lower end side, and both ends of the notch 28'a are connected to the magnetic plate 28. It is formed to have long legs 28'c and short legs 28'd, which are arranged in parallel at equal intervals so that the left and right sides alternate. A buffer plate 30 made of an insulator is provided so as to partition one end of the arc extinguishing chamber 26 over the tip side of the arc extinguishing grid group 27, so that the arc gas flowing out from the arc extinguishing grid group 27, 27' is buffered. The arc gas is transferred from the ventilation hole 30a of the plate 30 to the exhaust expansion chamber 31 provided in the bottom cover 2' of the mold base 2, and further to the arc gas exhaust expansion chamber 31 provided in the bottom cover 2' of the mold base 2. It is connected to the discharge port 32 so that arc gas is guided to the outside. When using the timed tripping bimetal 34 as the tripping element of the timed tripping device 33 of the overcurrent response device 18, the bimetal 34 is bent into a J shape as shown in FIGS. It is divided by a dividing groove 35 at the center of the width, leaving the upper end connecting part 34a on the long side, and at divided ends 34b and 34c on the parallel opposing short sides, there are lead wires 16a for leading out and introducing the current of the secondary coil 16. , 16b are connected. The bimetal 34 is attached to the bottom cylindrical protrusion 2d in the tripping element storage recess 2c of the mold base 2 by a mounting hole 34e provided in the armrest 34d and a mounting screw 37 passing through the bimetal insulating piece 36. installed. Further, a bimetal adjustment screw 38 is provided on the bimetal upper end connecting portion 34a so as to face the tongue piece 39a of the trip bar 39. The trip bar 39 is made of a molded insulator and extends from the opening/closing operation mechanism chamber 5 to each pole of the mold base 2.
The tongue piece 39a provided for each pole extends through the vicinity of the joint between the mold cover 3 and the mold cover 3, and an inclined surface 40 is integrally formed on one side of the tongue piece 39a. It is provided facing the screw 38, so that the gap between the bimetal adjusting screw 38 and the tongue piece 39a can be set at an appropriate position by adjustment work. Trip bar 3
9 is supported so as to be movable in the direction across the multipole, and the position of the inclined surface 40 of the tongue piece 39a can be changed by a rated current adjustable mechanism 5c provided in the opening/closing operation mechanism chamber 5, which will be described later. The set current can be adjusted by increasing/decreasing the gap between the corresponding bimetal adjusting screws 38. The lead-in piece 7'a on one side of the terminal conductive plate 7' is connected to the primary coil 15.
It is connected to the lead wire 15b at one end, and the other side is connected to the terminal 6' by a lead-out piece 7'b extending through the end partition wall of the mold base 2. The instantaneous tripping device 41 of the overcurrent response device 18 has a movable iron piece 42 for instantaneous tripping, and this movable iron piece 42 has an ear piece 42a in the center that connects to the pair of yokes 2.
0 and the small frame 43 installed between these yokes 20
It is rotatably supported by the yoke 20 by a support shaft 44 that passes through the yoke 20, and an enlarged wing portion 42b extending between the pair of yokes 20 is provided at one end so as to correspond to a part of the outer peripheral edge of the yoke 20. The tail portion 43c at the other end is provided to correspond to the protruding piece 39b of the trip bar 39. One end of the leaf spring 45 is attached to the movable iron piece 42, and the enlarged wing portion 42b of the constantly movable iron piece 42 is attached to the pair of yokes 20.
It is constructed so that it acts in the direction of separation from.
The instantaneous trip adjustment screw 46 is screwed into a small frame 43 attached to the yoke 20, and its penetrating tip abuts the other end of the leaf spring 45, causing the instantaneous trip adjustment cover 3' of the mold cover 3 to be adjusted. The instantaneous trip setting value can be adjusted to a desired value by removing it and changing the amount of deflection of the leaf spring 45 by rotating the adjustment screw 46 through the adjustment hole 3a with a screwdriver or the like. Furthermore, a stopper piece 43a of the movable iron piece 42 is provided at one end of the small frame 43. As shown in FIGS. 8 to 12, the opening/closing operation mechanism chamber 5 is provided with an opening/closing operation mechanism 5A and a tripping mechanism 5B in association with the contact crossbar 10 and the trip bar 39. Automatic tripping in response to overcurrent tripping can be controlled. The opening/closing operation mechanism 5A has a molded insulating handle 47 supported by a handle shaft 49 on a pair of left and right fixed frames 48 fixed to the mold base 2, and an operation knob 47a of the handle 47 is connected to the mold cover 3. It protrudes from the opening 3b so that the handle 47 can be rotated. In FIGS. 8 to 10, when the operating knob 47a of the handle 47 is tilted to the left, it is in the on state, and when it is tilted to the opposite side, it is in the off state. The handle spring 50, which constitutes a torsion spring, is attached to the fixed frame 48 and the handle 47.
The handle 47 is always biased in the off direction, that is, in the time direction. Handle 47
One end of an operating link 52 is connected to the lever by a pin 51, and the other end of the operating link 52 is loosely connected to a long slot 54a of a trip lever 54 by a pin 53. The trip lever shaft 55 is supported by the fixed frame 48, and the trip lever 54 is rotatably supported. One end of the contact link 56 is connected to the operating link 52 by a pin 53 that engages with the long groove hole 54a of the trip lever 54, and the other end is connected to the crossbar operating piece 10f formed integrally with the contact crossbar 10 by a pin 57. ing. One end of the blade spring 58 is hung on the pin 57 at the other end of the contact link 56, and the blade spring 5
The other end of the contact crossbar 8 is hung on a spring hanging piece 59 attached to the mold base 2, and constantly biases the contact crossbar 10 in the clockwise direction. In the trip mechanism 5B, the trip lever 54
The claw portion 54b at one end is a hooking portion 60 which is a semicircular notch of a trip pin 60 supported on the fixed frame 48.
It is engaged with a in normal closed and open circuit states. The trip pin arm 61 has a curved portion 61a along the circumference of the trip pin 60, and this curved portion 61a is provided with a long groove hole 61b, and the screw 62 passes through this long groove hole 61b to connect the tap provided on the trip pin 60. It is screwed into the hole and the trip lever 5
The hook portion 54b of No. 4 and the engaging portion 60 of the trip pin 60
The configuration is such that the amount of engagement with a is adjusted to a required amount of engagement by rotating the trip pin 60, and then fixed with a screw 62. One end of a bimetal 63 for ambient temperature correction is connected to one side 61c of a trip pin arm 61 that is integrally attached to the trip pin 60, and the other end of this bimetal 63 for ambient temperature correction is connected to the projection piece 39c of the trip bar 39.
is located opposite. A trip pin return spring 64 is provided to constantly pull the trip pin arm 61 clockwise, and the clockwise movement of the trip pin arm 61 is caused by the engagement protrusion 61d on the other side of the trip pin arm 61 being pressed against the fixed frame 48. The clockwise rotation of the trip pin arm 61 is limited by engagement with the provided locking piece 48a, and a steady state rest position of the trip pin arm 61 is determined. As shown in FIG. 5, one end of the trip bar 39 is connected by inserting a bearing pin 65 provided on the side wall of the mold base 2 of the opening/closing operation mechanism chamber 5 into a slide shaft hole 66 provided in the shaft core of the trip bar 39. The exposed part 67 of the metal shaft core is supported rotatably and slidably in the axial direction, and the other end is integrally embedded with the trip bar 39. The bearing plate is attached to the partition wall that separates the end pole chamber 4 from the adjacent pole. 68 so as to be rotatable and slidable in the axial direction. The trip bar spring 69 has one end engaged with the protruding piece 39c of the trip bar 39 and the other end engaged with the spring hanging piece 70 of the fixed frame 48, and always biases the trip bar 39 clockwise. As shown in FIGS. 8 to 11, the rated current adjustable mechanism 5C includes a rated current adjustable knob 71 made of a molded insulator rotatably supported by a mounting member 72 fixed to the fixed frame 48. The head of the adjustable knob 71 is exposed through the cutout hole 3c of the mold cover 3, and the lower end has an actuation piece 71a protruding at an eccentric position.
is fitted into the slot 39e of the trip bar 39, and by rotating the rated current adjustment knob 71 from the outside, the operating piece 71a is moved in an arc shape, thereby causing the trip bar 39 to slide in the axial direction. Therefore, the position of the sloped surface 40 of the tongue piece 39a corresponding to the bimetal adjustment screw 38 in each pole chamber changes, and the gap between the adjustment screw 38 and the corresponding sloped surface 40 is changed to adjust the set current. can. The trip push button 73 is the rated current adjustable knob 71
Similarly, the head is exposed through the cutout hole 3d of the mold cover 3, and the lower end is attached to the mounting member 7.
2, 72' and the upper side 74 of the U-shaped trip push button return spring 74 attached to the lower side of the mounting member 72'.
The trip push button return spring operating piece 74b is provided at the lower side of the trip push button 39 so as to press the protruding piece 39d of the trip bar 39. As shown in Figures 3, 8, 12a and 12b, the crossbar 10 is integrally formed with an opening/closing indicator piece 10c on the opposite side of the crossbar operating piece 10f, and around the opening/closing indicator piece 10c there are two grooves 10d, For example, one groove 10d is colored green and the other groove 10e is colored red, so that when the circuit is connected from the display window 3e of the mold cover 3 and the disconnector is closed, the red groove 10e is provided. In the open state, the open/closed state of the circuit or disconnector can be directly determined by visually observing the green groove 10d. Further, one end 75a of a transmission lever 75 to an auxiliary switch is connected to the crossbar operating piece 10f using a pin 57.
The free end 75b is rotatably supported by a shaft 76 and protrudes outward from an opening 77 provided in the bottom wall of the opening/closing operation mechanism chamber 5 of the mold base 2, and is connected to a micro switch 7 provided as an auxiliary switch.
8, 78' are provided so as to correspond to the operating buttons 79, 79'. The micro-switches 78, 78' have a deep bottom surface of each terminal chamber 4 of the mold base 2, and a shallow bottom surface of the opening/closing operation mechanism chamber, which is formed in different steps, so that the outside of the closed envelope of the molded insulator is formed at the lower bottom of the opening/closing operation mechanism chamber. The crossbar in the opening/closing operation mechanism chamber of the contact crossbar 10 extends across each electrode chamber and transmits the opening/closing operation of the fixed contact 24 and the corresponding movable contact 13 housed in each electrode chamber 4. Actuation piece 10
A micro switch 78, in which the free end 75b of the transmission lever 75, which performs two actions using the shaft 76 as a fulcrum, turns the control circuit "on" and "off" depending on the rotational position of f.
78' operating buttons 79, 79', and in the drawing, micro switches 78, 7
The operating buttons 79, 79' of the micro switches 78, 78' are mounted so as to sandwich the free end 75b of the transmission lever 75, and the operating buttons 79, 79' of the micro switches 78, 78'
79' When the armature or disconnector is in the "on" or "off" position, either actuation button 7 is pressed by the transmission lever 75.
9, 79' are provided so as to be in an operating state. Further, a plurality of micro switches 78, 78' may be provided in parallel on both sides of the free end portion 75b of the transmission lever 75. Next, to explain the opening/closing operation of the circuit breakers and disconnectors configured in this way, in the normal off state shown in FIGS. 8 and 13, the operating knob 47a of the handle 47 is tilted to the right. The claw portion 54b of the trip lever 54 can be engaged with the engaging portion 60a of the trip pin 60, and the contact crossbar 10, which is in the state of preparation for closing the circuit or disconnection, is in the open state of the main contact portion. Accordingly, the free end 75b of the transmission lever 75 to the auxiliary switch is held in the operating state by pressing the operating button 79' of the micro switch 78' on the right, and the micro switch 78 on the left The actuation button 79 is in an open state. These microswitches 78, 78' are provided with a contact structure, and each of the microswitches 78, 78' can output either an "on" or "off" signal to the control circuit. If the operating knob 47a is moved to the left to the on side from the OFF state of this circuit breaker or disconnector, the pin 53 is moved to the right within the elongated hole 54a of the trip lever 54 via the operating link 52, and as a result, the contact The contact crossbar 10 is rotated counterclockwise via the link 56, and the shear spring 58 is pulled to increase the tensile force, and in the final closing stroke, the handle shaft 49 and the pin 5
1 and the pin 53, the line becomes an overcenter link state, forming an inverted dogleg shape as shown in FIG. 9. In this state, the handle 47 and the operating link 5
2 is held stationary. Therefore, the contact crossbar 10 is connected to the movable contact 1 of the movable contact rod 11.
The contact crossbar 10 is rotated counterclockwise to the closed position of the main contact section, and the auxiliary switch The transmission lever 75 rotates clockwise to release the operating button 79' of the micro switch 78' on the right side of the free end 75b from the pressed operating state, and the operating button returns to its original state. Operation button 7 of switch 78
Press 9 to maintain the operating state. When the operating knob 47a is manually moved clockwise to the right from this ON state of the circuit breaker or disconnector, the pin 53 is moved to the left in the long groove hole 54a of the trip lever 54 via the operating link 52. The contact crossbar 10 is rotated clockwise via the contact link 56, and the contact crossbar 10 separates the movable contact 13 from the fixed contact 24 and enters the OFF state. In addition, in the case of automatic tripping due to overcurrent flowing and activation of overcurrent tripping device, overcurrent response device 1
When the trip bar 39 is rotated clockwise by the bimetal 34 of 8, the projecting piece 39c of the trip bar 39 rotates the bimetal 63 for ambient temperature correction, the trip pin arm 61, and the trip pin 6.
0 are rotated counterclockwise as a unit, thereby disengaging the engaging portion 60a of the trip pin 60 and the claw portion 54b of the trip lever 54, and the trip lever 54 is rotated counterclockwise to release the spring. The spring force of the cutting spring 58 causes the pin 53 to move through the long slot hole 5 of the trip lever 54 via the contact link 56.
4a to the left, the shear spring 58
is contracted, the contact crossbar 10 is rotated clockwise, the movable contact 13 is separated from the fixed contact 24, and the current is briefly cut off (FIG. 10). At the same time, since the handle spring 50 is directly rotated clockwise together with the handle 47, the operating link 52 and the trip lever 5
4. The contact link 56 is pulled up and through the process shown in FIG. 10, the handle spring 50 returns the claw portion 54b of the trip lever 54 to the OFF state in which it is engaged with the engaging portion 60a of the trip pin. Furthermore, when an excessive current such as a short-circuit current flows, the magnetic field generated in the primary coil 15, which is arranged so that current flows in the same direction as the fixed contact rod 23, links to the movable contact rod 11, causing this electromagnetic When the force is overcome by the acting force of the contact spring 12 and the contact crossbar 10 is held in the closed circuit position, the movable contact rod 11 is rotated clockwise about the protrusion shaft 11a that engages with the contact holder member 10a as a fulcrum, The movable contact 13 is early separated from the fixed contact 24 and is torn off, resulting in the state shown in FIG. 14 in which the movable contact 13 is held in the separated position by the reversal of the acting force of the contact spring 12. After this operation, the overcurrent response device 18 is activated, and as described above, the trip bar 39 rotates to disengage the engagement portion 60a of the trip pin and the claw portion 54b of the trip lever 54, and the opening/closing operation mechanism is collapsed. Then, the contact crossbar 10 is rotated clockwise, and the shaft 11a of the movable contact rod 11 is moved, so that the contact spring 12
The force acting on the movable contact rod 11 is reversed again.
is returned to its normal position, and the handle spring 50
As a result, the claw portion 54b of the trip lever 54 is returned to the off state shown in FIGS. 8 and 13, in which the closing preparation is completed, in which the claw portion 54b of the trip lever 54 is engaged with the engaging portion 60a of the trip pin. As described above, according to this invention, in a circuit or a disconnector equipped with a closing jacket formed by a mold base 2 and a mold cover 3 made of a molded insulator, at least A pair of contacts 13 and 24 that can be opened and closed, a contact crossbar 10 that transmits opening and closing operations to these contacts, rotatably supported at the middle part by a fulcrum shaft 76, and one end 75a interlocked with the contact crossbar 10,
At least a pair of micro switches 78, 78' are provided facing each other on both sides of the free end 75b, the other end of which is in the form of a thin plate.
79' is attached so as to sandwich the thin plate-shaped part, and when the contact crossbar 10 is in either the ON position or the OFF position, the transmission lever 75 is used to operate the operation button of one of the opposing microswitches. Since the micro switches 79 and 79' are biased into the operating state, by providing a plurality of micro switches 78 and 78' in parallel on both sides of the transmission lever, all the micro switches can be placed on one side of the transmission lever 75. Compared to those installed in parallel, the width required to operate all the micro-switches on the thin plate-like portion of the free end of the transmission lever 35 is smaller, ensuring reliable transmission operation and making the circuit easier to install the micro-switches. The width dimension of the disconnector, which has a relatively small margin, has been reduced, and the circuit board and disconnector, which has a relatively margin, is distributed in the longitudinal direction, making it possible to install the micro switch by effectively utilizing the installation space of the circuit board and disconnector. Quantity can be increased. Moreover, the relationship between the force required to operate a single microswitch and the stroke of the actuation button is as shown in Figure 16, when the force required for operation is applied to the actuation button from a free position where no external force is applied. Then, through the operating positions C and D, the operating position reaches the operating limit position F. Next, reduce the external force on the operating button and when the return force RF is reached, the return point D,
If the micro switch is provided only on one side of the transmission lever 35, following the process of returning to the free position A point where the external force is removed via point B, as described above, one micro switch requires an operating force of OF,
To operate multiple microswitches, the operating force required is a multiple of the number of microswitches, which increases the burden on the operating force of the opening/closing operation mechanism of the circuit and disconnector. This may result in a lack of operating force for the mechanism, which adversely affects the opening and closing operations of circuits and disconnectors. On the other hand, in this invention, at least micro switches 78 and 78' are provided on both sides of the transmission lever 35, and the relationship between the on/off operation of the circuit or disconnector and the required operating force of the micro switch is determined by 17 and 18, FIG. 17 shows the transmission lever 75 when the micro switches 78, 78' are in the neutral position and the operating buttons 79, 79' are in the free position. When the lever 75 is in the neutral position of the micro switches 78, 78', the operating button 79,
79' are provided so as to press the transmission levers 75 against each other, and the off-side micro switch 78 is in the operating position when the circuit or disconnector is in the OFF position when the circuit or disconnector is turned on. 17 and 18, the on-side microswitch 78 is in the return position at the OFF position of the circuit and disconnector.

[Table] Switch return
Switch returns
Through this process, the off-side microswitch 78' is returned to its original state, and the on-side microswitch 78 is brought into operation. In the on-to-off operation of the circuit breakers or breakers, the on-side microswitch 78 is in the operating position when the circuit breakers are in the on position, and the off-side microswitch 78 is in the return position when the circuit breakers are in the on position. 7
8' in Figures 17 and 18,

[Table] Switch return
switch operation
Through this process, the on-side microswitch 78 is returned to its original state, and the off-side microswitch 78' is brought into operation. In this way, the required operating force for the on-side microswitch requires an increase in the closing force of the opening/closing mechanism of the circuit and disconnector, but the amount of force required is half that of all the microswitches, and the operating force of the microswitch on this side is only half that of all the microswitches. The return force acts to assist the force of the breaker spring when opening the circuit breaker or disconnector, and the required operation force for the off-side microswitch is in a direction that opposes the opening operation of the circuit breaker or breaker. The degree of return is half that of all microswitches, and the return force of the microswitch installed on this side has the effect of helping the initial required closing force when closing a circuit or disconnector, and when closing a solenoid. Helps with power. In other words, the operating force required to operate the microswitches installed on either the on or off side only becomes a burden on the circuit or disconnection, and it is not possible to install a large number of microswitches only on the on or off side. The effect of being able to smoothly operate the same number of microswitches with half the operating force required in the case of a conventional auxiliary switch is significant, and even if a large number of auxiliary switches are installed, there is no adverse effect on the opening/closing operation of circuits or disconnectors. do not have.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a circuit breaker showing an example of implementing this invention, Fig. 2 is a right side view of the circuit breaker shown in Fig. 1, and Fig. 3 is a plan view of the circuit breaker shown in Fig. 1. Figure 4 is a plan view of the disconnector with the mold cover removed; Figure 4 is a sectional view of the electrode chamber taken along line 4-4 in Figure 1 in the direction of the arrow; Figure 5 is a cross-sectional view of line 5-5 in Figure 1. FIG. 6 is a cross-sectional view taken along the arrow direction, and FIG. 6 is a back view of the mold base of FIG. 1 with the bottom cover partially removed. Figure 7 is an exploded perspective view of the main parts of the electromagnetic device for circuit breakers;
Figures 10 to 10 are cross-sectional views of the opening/closing operation mechanism chamber viewed in the direction of the arrow along line 8-8 in Figure 1, and Figure 8 is a circuit breaker with an auxiliary switch showing an embodiment of this invention. Figure 9 showing the off and reset states of
Figure 10 is a similar diagram showing the on-state process, Figure 11 is an exploded perspective view of the rated current adjustment mechanism, Figures 12a and 12b are contact crossbars and movable contacts. Fig. 13 is a sectional view of the electrode chamber showing the off state, Fig. 14 is a sectional view of the electrode chamber showing the process of shorting and breaking, and Fig. 15 16 is a cross-sectional view of the main part showing an embodiment in which a plurality of micro switches are provided in parallel on both sides of the transmission lever's own end, and FIG. 16 shows the required force required to operate a single micro switch and the stroke of the operating button. 17 and 18 are simplified diagrams showing the relationship between the on/off operations of the circuit breakers and the required operating force of the microswitch according to this invention. In the figure, 1: Main body, 2: Mold base, 3: Mold cover, 4: Pole chamber, 5A: Opening/closing operation mechanism,
5B: Tripping mechanism, 6, 6': Terminal, 9: Arc horn, 10: Contact crossbar, 11: Movable contact rod, 12: Contact spring,
13: Movable contact, 14: Electromagnetic device, 15: Primary coil, 16: Secondary coil, 18: Overcurrent response device, 19: Fixed core, 20: Yoke, 23: Fixed contact rod, 24: Fixed contact, 25: arc horn, 26: arc extinguishing chamber, 27, 27': arc extinguishing grid group, 28, 28': magnetic plate, 30: buffer plate,
32: Discharge port, 33: Timed tripping device, 34: Bimetal, 39: Trip bar, 41: Instantaneous tripping device, 42: Movable iron piece, 45: Leaf spring, 47:
Handle, 52: Operation link, 54: Trip lever, 56: Contact link, 61: Trip pin arm, 71: Adjustable knob, 73: Trip push button, 75: Transmission lever, 78, 78': Micro switch, 79, 79': Actuation button.

Claims (1)

[Claims for Utility Model Registration] 1. In a circuit or disconnector having a closing envelope formed by a molded base and a molded cover made of a molded insulator, at least one pair of opening/closing devices provided within the closing envelope. a contact crossbar that transmits an opening/closing operation to the contact, a free end rotatably supported at an intermediate portion on a fulcrum shaft, one end interlocked with the contact crossbar, and the other end made of a thin plate. a transmission lever protruding from the opening hole of the closure jacket; at least two microswitches are provided facing each other on both sides of the thin plate-like free end of the transmission lever; The transmission lever biases the actuating button of one of the opposing microswitches into the operating state when the contact crossbar is in either the on position or the off position. A circuit disconnector with an auxiliary switch. 2. A circuit breaker with an auxiliary switch according to claim 1, wherein a plurality of micro-switches are provided in parallel on either side of the free end of the transmission lever.