KR920004652B1 - Remote-controlled circuit breaker - Google Patents

Abstract

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Description

Remote Control Circuit Breaker

1 to 9 are diagrams showing one embodiment of the invention described in claim 1,

1 is a side cross-sectional view of a control handle off and in a remote operation off state.

2 is a front view of a state in which the front cover of FIG. 1 is partially removed.

3 is a rear view of a state in which the rear cover of FIG. 1 is partially removed.

4 is a partial side view of the determination of the line IV-IV of FIG.

5 is a composite schematic diagram of FIGS. 1 and 4 showing a control handle auto and a remote operation off state.

6 is a composite schematic diagram of FIGS. 1 and 4 showing a control handle auto and a state of remote operation temperature.

7 is a composite schematic of FIGS. 1 and 4 showing a trip state.

8 is an exploded perspective view of an electronic part.

9 is a partial view of the arrow VII of FIG.

10 through 16 are diagrams showing one embodiment of the invention described in claim 2,

Fig. 10 is a side sectional view showing a state of a remote control off with a control handleoff.

11 is a front view of a state in which the front cover of FIG. 10 is partially removed.

12 is a schematic diagram of FIG. 10 showing a control handle auto and indicating a state of remote operation off.

FIG. 13 is a schematic diagram of FIG. 10 showing a control handle auto and a state of remote operation temperature. FIG.

14 is a schematic view of FIG. 10 showing a trip state.

FIG. 15 is a partial view of arrow XV of FIG. 12;

FIG. 16 is a partial view of arrow VI of FIG. 13;

17-23 show one embodiment of the invention as claimed in claim 3,

18 is a front view of a state in which the front cover of FIG. 17 is partially removed.

19 is a partially broken side view of the line VII-VII of FIG.

FIG. 20 is a composite schematic diagram of FIGS. 17 and 19 showing a control handle auto and a state of remote operation off.

21 is a schematic diagram of FIG. 17 and FIG. 19 showing the state of the control handle auto and the remote operation temperature.

22 is a composite schematic of FIGS. 17 and 19 showing a trip state.

23 is a synthetic schematic diagram of FIGS. 17 and 19 showing the state of mechanical temperature.

24 is a conventional operating system diagram of a three-phase induction motor.

25 is a view showing a conventional one.

* Explanation of symbols for main parts of the drawings

(5): Breaker case (5a): Front cover

(5b): Base (5c): Back Cover

(6): Power terminal (8)-(17): Contact part

(26): electromagnetic coil (28): fixed iron core

(30): movable iron core (34): transmission lever

200: electronic part 50: control handle

(52): opening 63: control lever

300: control mechanism 400: overcurrent trip

(78): Load side terminal (82): Off display

(83): Auto display part (84): Press bar

(86): spring (87): on display board

(88): connecting lever 90: pressing rod

(92): spring

The present invention relates to an improvement of a remote control circuit breaker having a circuit breaker original breaking function and a high frequency long life switching function.

FIG. 24 shows a conventional operating system diagram of, for example, a three-phase induction motor M. As is apparent from this figure, the conventional electric motor M is each a separate circuit breaker 1 and a (electromagnetic contactor 2). Is connected to a converter (not shown) via a main circuit mechanism configured in series.The reason for such a connection is that the circuit breaker 1 is short-circuited or overloaded, such as a main circuit mechanism or an electric motor (M). The main purpose is to protect equipment and converters, and the allowable opening and closing times are approximately 10,000 or less, so they are not used in places with frequent opening and closing such as power opening and closing, and it is also difficult to perform remote operation. The magnetic contactor (2) is used where the frequency of opening and closing frequently is high. In case of single use, the contact is welded, melted and reused when the current flows through the circuit due to a short circuit accident. Can not withstand. Were the same time to compensate for such unavoidable molded case circuit breaker (1) and subjected to jongcheung connection with the contactor (2), Fig. Frequent opening and closing the remote operation as in the above reasons prevent welding, melting of the contact.

Thus, the circuit breaker 1 and the magnetic contactor 2 were housed together in the case 3 as shown in FIG.

By the way, when storing the circuit breaker 1 and the magnetic contactor 2 in the case 3 as mentioned above, the circuit breaker 1 and the magnetic contactor 2 must be manufactured separately, of course, these mechanisms. In addition, the wiring between the respective mechanisms becomes complicated, and a large space is required inside the case 3, resulting in an increase in size.

The present invention has been made to solve such a problem, and can be compactly constituted as one component, and at the same time, the opening and closing performance of a high frequency coating life can be obtained by a remote operation type electronic part, and the control mechanism part Can be used to separate the electronics and obtain high-speed breaking performance by the overcurrent trip, and to enable the mechanical temperature control of the electronics from the outside, to check the circuits, and to detect the on / off state of the contacts externally. It is an object of the present invention to obtain a remote control circuit breaker which can obtain both or one side of the possibility.

The remote control circuit breaker according to the first invention has a contact portion, an electronic portion consisting of an electromagnetic coil, a fixed core and a movable core, a control lever and a control handle, and when the control handle is turned off, the control lever supports the control lever. When the control handle is automatized, a control mechanism part for playing the control lever and an overcurrent trip part are provided, and on the display of the control handle, " off " and " auto " are also displayed between the movable core and the control lever. A transfer lever disposed in the transfer lever for transmitting the operation of the movable iron core to the control lever, a push rod for pushing and operating the transfer lever to operate the contact portion on, and a spring for applying a force in the pushing direction of the push rod; It is equipped with.

In addition, the remote control circuit breaker according to the second invention has a contact portion, an electronic portion comprising an electromagnetic coil, a fixed iron core and a movable iron core, a control lever and a control handle, and a control lever when the control handle is turned off. And an overcurrent trip portion for supporting the control lever when the control handle is automatized, and displaying "off" and "auto" on the display of the control handle and coaxially with the control handle. When the on-display panel is rotatably installed, the on-display panel is connected to the control lever by a connecting lever, and when the control handle is in the auto position and the contact portion is in the on state, the on-display panel automatically turns on the control handle. The display part is covered.

In addition, the remote control circuit breaker according to the third invention has a contact portion, an electronic portion consisting of an electromagnetic coil, a fixed iron core and a movable iron core, a control lever and a control handle, and a control lever when the control handle is turned off. And a control mechanism part for playing the control lever and an overcurrent trip part when the control handle is automatized, and is disposed between the movable iron core and the control lever to transfer the operation of the movable iron core to the control lever. A lever, a push rod for pushing and operating the transfer lever to operate the contact portion on, and a spring which always protrudes to the outside by applying a force in the opposite direction to push the push rod.

In the first aspect of the present invention, when the control handle is in the auto position, the control lever becomes high. Therefore, the remote control type electronic part can open and close the contact part via the control lever without passing through the control mechanism part, and when the over current flows, The part is separated, the control mechanism part is tripped by the overcurrent trip part, and the contact part is opened and blocked by the control lever. In addition, in the present invention, when the push rod is pushed in, the transfer lever operates and becomes equal to the excited state of the movable iron core, so that the contact portion is turned on. When the pushing bar is stopped, the pushing bar returns to the origin along with the movable iron core and the control lever by the transfer lever returning by the tension spring, and the contact portion returns to the off position.

In addition, in the present invention, when the control handle is in the "off" and "auto" positions, the state can be detected from the outside by the "off" and "auto" of the display of the control handle, and the control handle is in the auto position. When the contact part is turned on, the push rod moves to a position where the push rod follows the transfer lever by a spring so that the state of the contact part temperature can be detected from the outside.

Next, in the second aspect of the invention, when the control handle is in the auto position, the control lever is played. Therefore, when an overcurrent flows at the time when the contact part can be opened and closed through the rare lever without using the control mechanism part. The electronic part is separated, the control mechanism part is tripped by the overcurrent trip part, and the contact part is opened and blocked by the control lever. Further, in the present invention, when the control handle is in the "off" and "auto" positions, the state can be detected from the outside by the "off" and "auto" of the display of the control handle, and the control handle is in the auto position. When the contact portion is in the on state, the on display panel is rotated by the control lever through the connecting lever so that the on display panel covers the auto display portion of the control handle so that the state of the contact portion temperature can be detected from the outside.

In the third aspect of the invention, when the control handle is in the auto position, the control lever becomes high, so that the contact part can be opened and closed via the control lever without using the control mechanism part, and at the same time, an overcurrent has flowed. At this time, the electronic part is separated, the control mechanism part is tripped by the overcurrent trip part, and the contact part is opened and blocked by the control lever. In addition, in this method, when the push rod is pushed against the spring, the transfer lever is operated to be in the same state as the excited state of the movable iron core, so that the contact portion is turned on. Then, when the pushing bar stops pushing, the pushing bar is fed back by the spring, the temporary core and the control lever are returned to the origin, and the contact portion returns to the off position.

An embodiment of the first invention will be described with reference to FIGS. 1 to 9. 1 is a side view of the remote control off state with the control handle off, FIG. 2 is a front view with the front cover partially removed in FIG. 1, and FIG. 3 is a back view with the rear cover partially removed in FIG. A partially broken side view of the line IV-IV of FIG. 2, FIG. 5 is a composite schematic diagram of FIGS. 1 and 4 showing the control handle auto and the remote operation off state, and FIG. 6 is a control handle auto and the state indicating the remote operation temperature. Fig. 1 and Fig. 4 are schematic diagrams of Fig. 1, Fig. 7 is a schematic diagram of Figs. 1 and 4 showing a trip state, Fig. 8 is an exploded perspective view of an electronic part, Fig. 9 is a partial view of arrow V of Fig. 5.

In the figure, reference numeral 5 denotes a breaker case, and is composed of a front cover 5a, a base 5b, and a rear cover 5c. Numeral 6 denotes a power shaft screw pressed against the base 5b and provided with an external threaded terminal screw 7. 8 is a power supply side stator supported on the back side of the base 5b, and one end is connected to the power supply side terminal 6 by a screw 7a. (9) is a power supply side fixed contact welded to the other end of the power supply stator (8), (10) a mover having a power supply side movable contact (11) and a load side movable contact (12) on both sides. Reference numeral 13 denotes a mover holder made of an insulator, and supports the mover 10. Reference numeral 14 denotes a cross-by over each pole, and is inserted into the groove 14a so that the movable holder 13 can slide. Reference numeral 15 denotes a pressing spring for applying a force to the mover 10 in the closing direction and is housed in the spring receiving portion 5d of the rear cover 5c. Reference numeral 16 denotes a load side fixed contact that faces the load side movable contact 12 and is welded to the load side stator 17. 18A and 18B are arc extinguishing portions disposed on the left and right sides of the movable holder 13, surrounded by an insulating plate 18a and an exhaust plate 18b, and formed of a magnetic body ( 18c). 19 is an exhaust passage formed by the base 5b and the back cover 5c, and the exhaust hole 20 is provided. Reference numeral 21 denotes a mounting bracket, which is supported by the back cover 5c so as to be slidable, and a force is applied to the right by the spring 22. As described above, the contact portions 8-17 are accommodated in the space portion formed between the base 5b and the back cover 5c, and the crossbar 14 is connected to the upper portion by the opening 23 of the base 5b. I'm in contact.

Next, the electronic part 200 is fixed to the base 5b by the screw 24 at the power supply side terminal 6 side of the front of the base 5b. As shown in FIG. 7, the electronic coil 200 is inserted into the magnet frame 25 having a shape, and the holes 26a and the magnet frame 25 of the coil 26 are inserted from above. Leg portions 28a-28c of the fixed core 28, to which the shading coils 27 are fixed, are inserted into the openings 25a, 25b, respectively, and also the cutouts 28d of the fixed core 28, Each elastic body 29 (spring in this embodiment) is inserted between the 28d and the magnet frame 25 to prevent the fixed core 28 from being separated from the magnet frame 25 and by the movable core 30. It is possible to absorb impact force. The movable iron core 30 is fixed to the holder 31 by a stopper 32, and each bearing portion 31a is provided at both ends of the holder 31, and the transfer lever 34 is provided by each side 33. As shown in FIG. Is rotatably supported by each bearing 34a. In addition, the transmission lever 34 is supported by the shaft 35 on the magnet frame 25, and is caught between each projection 34b of the transmission lever 34 and each projection 25c of the magnet frame 25. A force is applied in the opening direction between the movable iron core 35 and the fixed iron core 28 by each tension spring 36.

In the figure, 37 and 38 are auxiliary switches, and are fixed to the magnet frame 25 by screws 39 and 40, and the actuators 37a and 38a are holders 31. It is arranged to be turned on and off by the action of the movable iron core 30 in combination with each of the protrusions 31b.

In addition, 41 is a terminal block, the terminal 42 is pressed, and the terminal screw 43 for external connection is provided. In this embodiment, out of the three sets of six terminals 42, two or four terminals 42 at both ends are connected to the auxiliary switches 37 and 38 by the lead wires 44 and used as terminal blocks for the auxiliary switches. In addition, one of the pair of inner two terminals 42 is connected to the coil 26 via the limit switch 45 and the other is directly connected to the coil 26. That is, the limit switch 45 and the coil 26 of the electronic part 200 are connected in series. The limit switch 45 is fixed to the screw 46 to the magnet frame 25. The terminal screw 43 is exposed to the outside from the opening 47 of the front cover 5a, and an external electric wire (not shown) is connected, and the terminal block 41 is magnetized by each of the fixed leg portions 41a. It is fixed to the frame 25. 48 is a terminal cover, and the terminal screw 43 of the terminal block 41 is not required to be exposed to the outside without necessity.

Next, the control mechanism 300 is arrange | positioned at the front middle part of the base 5b. 49 is an instrument frame fixed to the base 5b by screws 49a, 50 is a control handle rotatably supported by the shaft 51 on the instrument frame 49, and the front cover 5a. The inner projection 50a is connected to the link 54 by the pins 53 and constitutes a toggle link mechanism. At the other end of the link 54, a roller 55 is axially rotatably supported. Reference numeral 56 is a lever, which is rotatably supported by the shaft 51 on the mechanism frame 49, and the tip portion is held by the latch 57. The latch 57 is rotatably supported by the shaft 58 by the mechanism frame 49, and a force is applied counterclockwise by a torsion spring (not shown). (59) is a trip bar rotatably supported by the shaft (60) to the instrument frame (49), to be applied clockwise by a torsion spring (not shown) and to engage the latch (57). It is. 61 is a platen supported in the respective U-grooves 49b of the mechanism frame 49 so as to be movable up and down, and a force is applied upward by the tension spring 62, and the roller 55 on the upper end surface. At the same time, the lever 56 is engaged. 63 is a control lever rotatably supported by the shaft 64 on the instrument frame 49, one end 63a is engaged with the crossbar 14, and the other end 63b is connected to the transfer lever 34. It engages with the holding part 35c and is engaged in the hole 61a of the platen 61. As shown in FIG. In FIG. 1, since the control handle 50 is in an off state, the control lever 63 is restrained by the tension spring 62 through the platen in the upward direction. That is, since the load of the tension spring 62 is greater than the load of the pressing spring 15 that exerts a force on the mover 10, the control lever 63 is maintained in the state of FIG. 1, and both the contacts 9, ( 11), (12) and (16) are cleared. At this time, as shown in FIG. 1, a gap is formed between the other end 63b of the control lever 63 and the locking portion 34c of the transmission lever 34. As shown in FIG.

Next, an overcurrent trip part 400 made of a bimetal and a plunger type electromagnet is disposed on the load side in front of the base 5b. 65 is a 1st yoke, the load side stator 17 is connected to the end 65a by the screw 66, the bimetal 67 is welded, and the adjustment screw 68 is provided. 69 is a bobbin, and is provided with the hollow core 70 and the plunger 71 which were stuck to the 1st yoke 65 inside. The plunger 71 is exerted upward by the pressure spring 72 for detection. The tip 71a of the plunger 71 is engaged with the U groove 59a of the trip bar 59. When the plunger 71 is sucked in the core 70 direction, the trip bar 59 is connected to the torsion spring. Rotate against it. Reference numeral 73 is a rod and extends to the movable holder 13 via the hollow portion of the core 70, the hole 74 of the base 5b, and the hole 14a of the crossbar 14. Also, when the plunger 71 is sucked in the direction of the core 70, the plunger 71 strikes the mover holder 13 through the rod 73 so that both contacts 9, 11, 12, 16 Gary). Reference numeral 75 is a second yoke, which is attached to the first yoke 65, 76 is a coil, one end of which is connected to the front end of the bimetal 67 by the flexible copper wire 77, and the other end thereof is the load side. It is connected to the terminal 78. A terminal screw 79 for external connection is provided on the load side terminal 78. 80 is an operation piece, is rotatably supported by the shaft 81 of the first yoke 65, and has a force applied in the counterclockwise direction by a spring (not shown), and a trip bar 59 ) Has an arm (80a) that engages. The trip time is adjusted by changing the gap between the tip of the bimetal 67 and the working piece 80 by the rotation of the adjusting screw 68.

In addition, in the drawing, reference numeral 82 denotes an off display portion disposed on the control handle 50, 83 an auto display portion disposed on the control handle 50, and 84 a hole 85a and a magnet of the front cover 5a. The pressing rod 86 supported by the hole 85b of the frame 25 so as to be movable up and down is a weak spring that always applies the pressing rod 84 downward, and the pressing rod 84 is provided by the spring 86. The lower end 84a of the contact with the transmission lever 34 follows the transmission lever 34.

Next, the operation will be described.

In the off state of the control handle 50 shown in FIGS. 1 to 4, the off display portion 82 of the control handle 50 is moved from the opening 52 of the front cover 5a as shown in FIG. It is possible to detect the off state of the contact part from the outside because it looks through. When the control handle 50 is set to the auto position by turning the control handle 50 to the right in this contact-off state, as shown in FIG. 5, the link 54 is extended so that the platen 61 is tension spring 62. FIG. ) And the control lever 63 is released. The control lever 63 rotates clockwise through the crossbar 14 by the pressure springs 15 of the contact portions 8-17, and when there is no gap with the transmission lever 34 of the electronic portion 200. The suspension is stopped by the tension spring 36 that applies the force to the transfer lever 34. That is, it is because it is designed so that the load of the tension spring 36 may become larger than the load of the press spring 15. FIG. At this time, the mover 10 rises as much as the gap between the transmission lever 34 and the control lever 63 disappears, so that the opening distance between the two contacts 9, 11, 12, and 16 is shown in FIG. -Some decrease from the state of FIG. In the auto state of the control handle 50, the auto display portion 83 is viewed from the opening 52 as shown in Figs. 5 and 9, so that the contact portion off state in the auto state can be detected from the outside. Can be. At this time, since the transmission lever 34 does not operate, the pressing rod 84 does not move, but protrudes from the front cover 5a.

And when the handle auto-shown in FIG. 5 is shown and the electronic part 200 is unexcited (when remote off), the limit switch 45 detects the movement of the platen 61, and is in the on state. When a voltage is applied to the terminal 42 from the outside, the coil 26 is excited and the movable core 30 is attracted to the fixed core 28. Since the transmission lever 34 rotates counterclockwise against the tension spring 36 to release the control lever 63 together with the movable iron core 30, the mover 10 is connected to the pressing spring 15. Rises, and both the contacts 9, 11, 12, and 16 are closed. Fig. 5 shows the handle auto and female (remote temperature). At this time, the projection part 31b of the holder 31 presses the actuators 37a and 38a of the auxiliary switches 37 and 38 to operate the contacts of the auxiliary switches 37 and 38. In addition, although the movable iron core 30 collides sharply with the fixed iron core 28, the impact force is absorbed by the elastic body 29. Since the transfer lever 34 moves in the state of the contact portion of FIG. 6, the pressing rod 84 is lowered by the spring 86 to enter the hole 85a of the front cover 5a. It can be detected at.

Next, in FIG. 6, when the application of the voltage to the terminal 42 is turned off, the movable iron core 30 is operated in the opening direction by the tension spring 36, and the transfer lever by the tension force of the tension spring 36 34, the control lever 63 is rotated counterclockwise, and overcomes the pressing spring 15 of the mover 10 to open both contacts 9, 11, 12, and 16. The process returns to the state shown in FIG. In this way, the state of FIG. 5 and FIG. 6 can be repeated, ie, it can open and close a contact by remote operation (voltage application), without making it through the control mechanism part 300. FIG.

In the ON state of FIG. 6, the current flows from the power supply terminal (6) to the power supply stator (8) to the power supply fixed contact (9) to the power supply movable contact (11) to the actuator (10) to the load side movable contact (12). (16) → load side stator 17 → first yoke 65 → bimetal 67 → flexible copper twisted pair 77 → coil 76 → load side terminal 78;

6, the bimetal 67 is bent in the right direction, the trip bar 59 is rotated counterclockwise against the torsion spring through the operating piece 8, and the latch 57 is rotated. ) Rotate clockwise against torsion spring. Since the lever 56 is released by the rotation of the latch 57, the platen 61 is pushed up by pushing the roller 55 to the left side with the lever 56 by the tension spring 62, and the control lever ( 63 is rotated counterclockwise against the pressing spring 15, and the two contacts 9, 11, 12, and 16 are opened. This trip state is shown in FIG. In the trip state of FIG. 7, since the control handle 50 is in an intermediate position, the trip state can be detected from the outside.

At this time, the limit switch 45 is also broken by the rise of the platen 61, and the excitation of the coil 26 is eliminated, so that the movable iron core 30 is opened in the same way as the off operation, and controlled by the transmission lever 34. The lever 63 transmits the force in the direction of opening both the contacts 9, 11, 12, and 16. That is, two spring loads of the tension spring 62 and the tension spring 36 act on the contact portions 8-17, and both the contacts 9, ( 11), 12, and 16 are opened.

Next, when the short-circuit current flows in FIG. 6, the plunger 71 is instantaneously attracted by the coil 76 in the direction of the core 70, and the trip bar 59 is counterclockwise against the torsion spring. The mechanism is operated in the same manner as in the operation of the bimetal 67, and the plunger 71 strikes the movable holder 13 directly through the rod 73, so that both the contacts 9, 11, 12 ), (16) to open. The arc generated between the contacts moves between the vehicle 10 and the respective stators 8 and 17, and then continues between the two arc runners 82 and 83 and the respective stators 8 and 17. It is divided and subdivided by each grid 18c. In addition, the hot gas generated in each of the extinguishing portions 18A and 18B is discharged to the outside from each exhaust hole 20 through the exhaust passage 19 through a hole (not shown) of each exhaust plate 18b.

In the reset operation, the control handle 50 is turned to the left (off direction) in the state of FIG. 7, and the latch 57 is loaded on the platen 61 by the lever 56 pushing the roller 55 to the right. Is completed by mating.

As described above, when the control handle 50 is in the "off" and "auto" positions, the off display portion 82 and the auto display portion 83 of the control handle 50 respectively open the opening 52 of the front cover 5a. It is possible to detect the "off" and "auto" states from the outside, and when the control handle 50 is in the auto position and the contact portion is in the on state, the pressing rod 84 is moved by the spring 86. Since it moves to the position to follow the transfer lever 34, and it pushes in, it is possible to detect the state of a contact part temperature from the outside by the movement of this push rod 84.

In the above description, the remote operation has been described. However, in the case where the electronic part 200 is mechanically turned on from the outside for a circuit check or the like in the field, the remote control of FIG. 5 with the control handle 50 in the auto position is shown. In this case, the pressing bar 84 may be pushed in. Pushing the push rod 84 against the tension spring 36 in the state of FIG. 5, rotates the transfer lever 34 counterclockwise against the tension spring 36, as shown in FIG. When the movable iron core 30 is excited, the contact portion 8-17 is closed by rotating the control lever 63 clockwise by the pressing spring 15. When the press bar 84 is released in the state of FIG. 6, the press bar 84 is moved together with the movable core 30 and the control lever 63 by the transfer lever 34 returned by the tension spring 36. The process returns to the state of FIG.

Next, an embodiment of the second invention will be described with reference to FIGS. 10 to 16. FIG. 10 is a side cross-sectional view showing a state of remote control off with a control handle off, FIG. 11 is a front view of a state with some front cover removed from FIG. 10, and FIG. 12 is a view of FIG. Fig. 13 is a schematic view of Fig. 10 showing the state of remote operation temperature, Fig. 14 is a schematic view of Fig. 10 showing a trip state, Fig. 15 is a partial view of arrow XV of Fig. 12, Fig. 16 is Fig. 13 It is a partial view of the arrow VI of FIG., And attaches | subjects the same code | symbol to the same or equivalent part as the embodiment shown to FIG. 1-FIG. 9, and abbreviate | omits description.

In the figure, 86 is an on-display panel rotatably mounted to the shaft 51, and is connected to the control lever 63 by the connecting lever 88. As shown in FIG. Reference numerals 89a and 89b are pins for rotatably supporting both ends of the connecting lever 88 to the on display panel 87 and the control lever 63, respectively.

In the off state of the control handle 50 shown in FIGS. 10 and 11, the off display portion 82 of the control handle 50 is moved from the opening 52 of the front cover 5a as shown in FIG. It is possible to detect the off state of the contact part from the outside because it looks through.

In the auto state of the control handle 50 shown in FIGS. 12 and 15, the auto display portion 83 of the control handle 50, as shown in FIG. 15, opens the opening 52 of the front cover 5a. It can be detected from the outside so that the contact state can be detected from the outside. At this time, since the control lever 63 does not operate, the on display panel 87 does not move.

Since the control lever 63 moves in the state of the contact portion temperature shown in FIG. 13, the connecting lever 88 is lowered accordingly so that the on display panel 87 rotates in the clockwise direction, and as shown in FIGS. 13 and 16 As shown in the on-screen display 87 from the opening 52. As a result, the ON state of the contact portion can be detected from the outside.

In the trip state shown in FIG. 14, since the control handle 50 is in an intermediate position, the trip state can be detected from the outside.

As described above, when the control handle 50 is in the " off " and " auto " positions, the off display portion 82 and the auto display portion 83 of the control handle 50 respectively open the opening 52 of the front cover 5a. ), The state of "off" and "auto" can be detected from the outside, and when the control handle 50 is in the auto position and the contact portion is in the on state, the on-display panel 87 controls the control handle 50. By covering the auto display unit 83 of Fig. 1), the on-display panel 87 is visible from the opening 52, and the on-state of the contact portion can be detected from the outside.

In addition, an embodiment of the third invention will be described with reference to FIGS. 17-23.

17-23 show one embodiment of the third invention, FIG. 17 is a side cross-sectional view showing a state of remote control off with a control handle off, and FIG. 18 with a front cover partially removed from FIG. Front view, FIG. 19 is a partially broken side view of the line VIII-VIII of FIG. 18, FIG. 20 is a composite schematic diagram of FIG. 17 and FIG. 19 showing the state of the remote control off and the remote control off, and FIG. 17 and 19 show the state of operation temperature, 22 shows the synthesized view of FIGS. 17 and 19 show the trip state, and 23 shows the 17 and 19 show the state of mechanical on. It is a schematic diagram, and the same code | symbol is attached | subjected to the part same as an Example shown in the said FIG.

In the drawing, reference numeral 90 denotes a push rod supported up and down in the hole 91a of the front cover 5a and the hole 91b of the magnet frame 25, and 92 denotes the push rod 90 always upward. The spring 92 exerts a force, and by this spring 92, the lower end 90a of the pressing rod 90 comes into contact with the transmission lever 34 in the ascending position, and the upper end 90b is external from the front cover 5a. To protrude.

In this way, if the pressing rod 90 is provided, the electronic part 200 can be mechanically turned on from the outside in the field, and the circuit inspection and the like can be performed. That is, in the state of remote-off of FIG. 20 with the control handle 50 in the auto position, the pressing rod 90 may be pushed in. In the state of FIG. 20, when the push rod 90 is pushed against the spring 92, the transmission lever 34 is rotated counterclockwise against the tension spring 36 as shown in FIG. In the same state as when the movable iron core 30 is excited, the contact portions 8-17 are closed by rotating the control lever 63 clockwise by the pressing spring 15. When the pressing rod 90 is released in the state of mechanical temperature (manual temperature) shown in FIG. 23, the pressing rod 90 is returned by the spring 92, and the transfer lever 34 is extended by the tension spring 36. In this case, the transfer lever 34 returns the state of FIG. 20 by opening the contact cores 8-17 through the control lever 63 and simultaneously opening the movable iron core 30.

As described above, according to the present invention, it can be compactly constituted as one member, and the high frequency long life switching performance can be obtained by the electronic part of the remote operation type, and the electronic part is separated by the control mechanism to overcurrent trip. The high speed cut-off performance can be obtained by the part, and the mechanical on operation of the electronic part can be performed from the outside, so that the circuit can be inspected and the like, and the off state of the contact part can be obtained from the outside. There is an effect.

Claims (6)

A case 5, fixed contacts 9 and 16 fixed to the case, movable contacts 11 and 12 movably mounted to the case so as to contact and leave the fixed contact, and the electromagnetic coil 26 And an electronic part (200) comprising a fixed iron core (28) fixed to the case, a movable iron core (30) movably mounted to the case so as to be attracted to the fixed iron core, and the movable contact ( A control lever 63 rotatably mounted to the case so that 11 and 12 contact and leave the fixed contacts 9 and 16, and a control handle 50 for releasably holding the control lever 63. The control lever 63 is formed at the position where the movable contacts 11 and 12 are separated from the fixed contacts 9 and 16 when the control handle is in the first position. And releasing the control lever 63 to perform a predetermined rotation when the control handle is in the second position. In the control part 50 and the control lever 63, the movable contacts 11 and 12 are connected to the fixed contacts 9 and 16 when the bent part 300 and a current larger than a predetermined value flow through the circuit breaker. An overcurrent trip part 400 operative to deviate from the contact, a transfer lever 34 rotatably mounted to the case 5 to transmit the movement of the movable iron core 30 to the control lever 63; A remote control type, comprising: pushing rods 84, 90 protruding from the case at a first position and movably mounted to the case 5 to contact the transfer lever 34 at a second position. Circuit breaker. 2. The remote of claim 1, wherein the first position of the control handle 50 is an off position of the circuit breaker and the second position of the control handle 50 is a remotely operable position of the circuit breaker. Operated Circuit Breakers. 2. A remote control circuit breaker according to claim 1, characterized in that the press bar (84) is made of a spring (86) for applying force to the press bar such that the push bar (84) always contacts the transfer lever (34). 4. The remote of claim 3, wherein the first position of the control handle 50 is an off position of the circuit breaker, and the second position of the control handle 50 is a remotely operable position of the circuit breaker. Operated Circuit Breakers. The remote control circuit breaker according to claim 1, wherein the pressing rod (90) is provided with a spring (92) for applying a force to the pressing rod so that the pressing rod (90) always protrudes from the case. 6. The remote of claim 5, wherein the first position of the control handle 50 is an off position of the circuit breaker and the second position of the control handle 50 is a remotely operable position of the circuit breaker. Operated Circuit Breakers.

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