TWI351705B - - Google Patents

Description

1351705 (1) EMBODIMENT OF THE INVENTION [Technical Field] The present invention relates to a circuit breaker including a disconnecting means for driving a high-speed ratio of an operating shaft of a vacuum tube to a breaking direction by an electromagnetic repulsion. [Prior Art] The breaking means for driving the operating axis of the vacuum tube in the breaking direction by the electromagnetic repulsive action is constituted by a coil and a ring-shaped copper plate disposed opposite thereto. The coil of the electromagnetic excitation breaking means is rapidly demagnetized by a capacitor discharge or the like, and the vacuum tube is opened by the electromagnetic repulsive force of the coil current and the eddy current of the copper plate. In circuit breakers with electromagnetic repelling mechanisms, there are DC circuit breakers and high-speed circuit breakers. The former is to inject the charge previously charged to the capacitor in the opposite direction of the system current, and forcibly creates a current zero point to be disconnected. When a ground fault occurs in the DC system, a fast rising ground current is determined by the circuit constant of the resistor and the inductor. Therefore, high speed responsiveness is required in the disconnection operation. On the one hand, the latter is about the self-use power generation system, and is introduced to prevent the power outflow from the power generator side when the power system is out of power, to avoid the power failure of the overloaded power supply, and to switch from the power failure system to the sound system at high speed. The operation of the important load is continued, and the like. Both accept the responsiveness within a few m s after the disconnection command, and thus the electromagnetic repulsion mechanism is utilized. As a circuit breaker that carries the electromagnetic repulsion mechanism, as shown in the patent document-5- (2) 1351705, a vacuum tube, an operation mechanism provided in the opening and closing direction of the vacuum tube, and the operation are provided. The electromagnetic repulsion mechanism on the way to the mechanism is also a mechanism for reducing the automatic reduction of the shaft on the movable electrode side during the interruption of the current interruption. [Patent Document 1] Japanese Laid-Open Patent Publication No. 2000-29904 No. PCT Publication No. 2000-29904 1 发明 In the above-described conventional circuit breaker, not only a predetermined breaking speed but also a need to maintain a disconnection state is required at the time of high-speed disconnection. The attraction force of the permanent magnet is also high, and the electromagnetic repulsive force is high. Therefore, it is necessary to increase the size of the electromagnetic repulsive mechanism and increase the power supply capacity. Further, between the vacuum tube and the operating mechanism, the mechanism for automatically reducing the axis of the movable electrode side generated by the electromagnetic repulsion mechanism and the electromagnetic repulsion mechanism is arranged in series in the vertical direction. Therefore, when the vacuum tube is opened and closed by the operation mechanism of the vacuum tube, it is necessary to move the electromagnetic repulsion mechanism together and the automatic reduction mechanism of the shaft on the movable/electrode side. Therefore, in the case of the operation mechanism of the vacuum tube, for example, in the case of the electromagnetic operation mode, it is necessary to increase the capacity of the permanent magnets, the exciting coils, and the like of the components, thereby increasing the operating mechanism of the vacuum tube. Further, along with this, there is a possibility that the operability of the operating mechanism of the vacuum tube is lowered. The present invention provides a circuit breaker which is easy to release the conduction state due to the electromagnetic repulsion mechanism, and which can reduce the automatic reduction of the movable electrode side shaft when the current is interrupted, and has good operability. purpose. -6- (6) (6) 1351705 Fig. 4 is a front view showing an embodiment of a rectifying DC circuit breaker of the circuit breaker of the present invention shown in Fig. 1. Fig. 5 is a system circuit diagram showing an embodiment of a rectifying DC circuit breaker to which the circuit breaker of the present invention shown in Fig. 1 is applied. Fig. 6 is a timing chart showing an operation at the time of an accident in an embodiment of the rectifying DC circuit breaker of the circuit breaker of the present invention shown in Fig. 1. Fig. 7 is a timing chart showing an operation at the normal operation of an embodiment of the rectifying DC circuit breaker of the circuit breaker of the present invention shown in Fig. 1. First, using Figs. 5 to 7 for this A method of using and an operation method of an embodiment of a rectifying DC circuit breaker of a circuit breaker according to the invention will be described. In Fig. 5, the symbol 1 is a DC power supply, and a voltage of 1 500 V of the positive electrode is supplied to a general DC feed circuit. 2 is a load indicating a train or the like. 3 is a feeder that supplies electric power to the load, and 4 is a flyback line that connects the load 2 and the DC power source 1. The rectifying DC circuit breaker 5 of the circuit breaker of the present invention is inserted in the middle of the feeder line 3, and the switch is supplied with power from the DC power source 1 to the load 2. The rectifying DC circuit breaker 5 is composed of a first main switch 51, a second main switch 52, a first sub-switch 53, and four switches of the second sub-switch 5, and a control device 50. A first capacitor 55, a second capacitor 56, and a reactor 57 are connected to the rectifier type DC breaker 5. The first main switch 51 and the second main switch 52 are inserted in series with the feeder line 3, and the first main switch 51 is disposed on the DC power source 1 side, and the second main switch 52 is disposed on the load 2 side. The first sub-switch 53 and the series 10- (7) (7) 1351705 circuit of the first capacitor 55 and the reactor 57 are connected in parallel to the first main switch 51, and the second sub-switch 54 is connected in series with the second capacitor 56. The circuit is connected in parallel to the first capacitor 55. The current transformer 58 provided on the feeder 3 detects the energization current of the feeder 3 and inputs its current 値 to the overcurrent trip device 59. The overcurrent breaking device 59 has an automatic disconnection setting 値, and outputs an OFF command 11 when the current 値 of the feeder 3 reaches the set value or more. The control device 50 receives the disconnection command 1 from the external command 10 or the overcurrent trip device 59, and gives the open/close command to the rectifier DC breaker 5. The first sub-switch 53 is interlocked with the first main switch 51, and after the first main switch 51 is turned off, the delay time t1 (e.g., 2 ms) is turned on, and then turned off. On the one hand, the second sub-switch 54 is connected to the second main switch 52, and the second main switch 52 is turned off before the time t2 (e.g., 2.5 ms) of the disconnection. When the load 2 is operated, the first main switch 51 and the second main switch 52 are turned on, and DC 1 500 V is applied to the load 2. At this time, the first sub-switch 53 is turned off, and the second sub-switch 54 is turned on. Further, the first capacitor 55 and the second capacitor 56 are charged to +2000 V with the DC power source 1 side as a reference. When a failure of the load 2 occurs, or a grounding accident of the feeder 3 or the like occurs, an accident current that rises rapidly due to a circuit constant is generated in the feeder line 3. For example, when the circuit resistance is 15 ιηΩ and the circuit inductance is 150//H, the maximum reaching current is l〇〇kA, and the maximum rush rate is 10 kA/ms. When such an accident current occurs, in order to suppress the influence on the equipment, the accident current must be disconnected at a high speed. First, the accident current -11 - (8) (8) 1351705 检测 is detected at the converter 58, and is input to the overcurrent trip device 59. If the automatic disconnection setting of the overcurrent trip device 59 is set to, for example, 1 2000A', the timing of the accident current 値 reaches 12000A, the disconnection command is sent to the control device 50. The first main switch 51 is turned off by an instruction from the control device 50. The opening of the first main switch 51 is made to cause the first sub-switch 5 to be turned on by the delay time t1. Thereby, the first capacitor 55' second capacitor 56, the reactor 57, the first main switch 51, the first sub-switch 53', the second sub-switch 54 constitutes an LC resonance circuit to make the first capacitor charged in advance. The second capacitor 56 is discharged, and a rectified current in a direction opposite to the direction of the accident current is injected into the first main switch 51. When the electrostatic capacity of the first capacitor 55 is 60 yF and the electrostatic capacity of the second capacitor 56 is 1200 Ω, the rectified current 相反 in the opposite direction is 40 kA at the maximum, so that the accident current 値 reaches 40 kA. When the first sub-switch 53 is turned on, the accident current and the rectified current are killed. When the current of the first main switch 51 becomes zero, the first main switch 51 completes the open circuit. After the first main switch 5 1 is turned off, the second main switch 52 is turned off by the delay time t3, but if the time t3 is set to satisfy the condition of t3 > t1 + t2, then the first sub-switch 53 The second sub-switch 5 4 is not turned off before being turned on, so that the first capacitor 5 5 and the second capacitor 5 6 can be simultaneously discharged, as described above, which can correspond to a large current. Moreover, even if the first main switch 51 completes the open circuit, the first sub-switch 5 3 and the second sub-switch 54 both have a period of being in an on state, and thus the first capacitor 55 and the second capacitor 56 are powered by the DC power source 1 Being charged. This charging current is such that the charging voltage rises and the circuit current is zero, and the timing of the -12- (9) 1351705 vacuum tube's off current 値 is broken. On the other hand, the rectifying DC circuit breaker 5 in the normal operating state operates by using the external command 10 . When the external command 1 〇 accepts the command, the first main switch 51 and the second main switch 52 are simultaneously applied. At this time, the second sub-switch 54 is disconnected at the time t2 before the second main switch 52 is applied. Therefore, when the first sub-switch 53 is applied, the first capacitor 55' reactor 57 is established, the first main switch An LC resonant circuit formed by a pair of switches 53. The first capacitor 55 previously charged and the second capacitor 56 are discharged, and the rectified current is injected to the first main switch 51 in the opposite direction to the load current. Here, the load current 値 is set to 20001 2000A or less of the overcurrent trip device 59. If the rectified current at the time of discharge of a capacitor 55 is 値 as 1 4 k A to kill the maximum load current of 1 2000 A, and at the timing when the first main switch 51 becomes zero, the first main switch 51 completes the open circuit. Further, the second switch 52 functions to cut off the load 2 and the first unit 55 and the second capacitor 56 after the breaker is turned off, thereby preventing a power-induced accident caused by the charging voltage of the load-side capacitor. Hereinafter, an embodiment of the above-described rectifier type DC circuit breaker of the present invention will be described using Figs. 1 to 4 . The rectifier type DC circuit breaker 5 of the circuit breaker of the present invention is constructed by two electromagnets and mechanical links, and automatically realizes the operation timing of the switches. In the first to fourth figures, the disconnection opening finger of the state (the first main switch 51 and the second main switch 52 are in an on state) is shown to be turned off and off to be turned on 51, the middle, only the direction The biggest one will only be the next. Then, the current of the two main open capacitors is broken. Four -13- (10) (10) 1351705 Switches are vacuum tubes that have a pair of contacts inside, but can also be used in gas switches. First, an electrical connection is made to an embodiment of the rectifying DC circuit breaker 5 of the circuit breaker of the present invention. The fixed side feed line 100 of the first main switch 51 and the fixed side feed line 114 of the second main switch 52 are connected to a bus bar (not shown) disposed outside the rectifying DC circuit breaker 5. The same bus bar is connected to one end of the reactor 57. The other end of the reactor 57 is connected to the first capacitor 55 and the second capacitor 56. The movable conductor 62 of the first main switch 51 is electrically connected to the movable side feeder 120 via the collecting portion 1〇1. The movable side feed line 120 is connected to the DC power source 1. Further, the movable conductor 62 of the first main switch 51 and the movable conductor 69 of the first sub-switch 53 are electrically connected to each other via the conductors 102, 103, the flexible conductor 104 and the conductor 156. The feed line 106 and the feed line 107 are fixed to the fixed conductor 108 of the first sub-switch 53. The feeder 107 is a fixed conductor 109 connected to the second sub-switch 54. On the one hand, the feeder 106 is external to the rectifier type DC breaker 5 and is connected to the first capacitor 55. Further, the movable conductor 110 of the second sub-switch 54 is connected to the second capacitor 56 via the conductor 111, the flexible conductor 112, and the feed line 113. The movable conductor 200 of the second main switch 52 is electrically connected to the movable side feed line 203 via the collecting portion 20 1 . The movable side feed line 20 3 is connected to the load 2. The system circuit shown in Fig. 5 is realized by the above electrical connection method'. Hereinafter, a mechanical structure of an embodiment of the rectifying DC circuit breaker 5 of the circuit breaker according to the present invention will be described with reference to Figs. 1 to 4 . -14- (11) 1351705 As shown in Fig. 1, the movable conductor 62 of the first main switch 51 is connected to the member 64. The operating lever 65 is fixed at one end to the member 64' and the other end. Fixed to the hinge 66. The movable conductor 69 of the first sub-switch 53 is coupled to the hinge 66 via a member 67 via a pin 534. That is, the movable conductor 62 of the first main switch 51 and the movable conductor 69 of the first sub-switch 53 operate in conjunction with each other. The operating lever 65 is passed through a pin 150 that is applied to the upper and lower portions by planar processing. The nut 152' fixed to the pin 15A and the operating lever φ 65 serves as a holding washer 153, a spring ι 51, and a washer 154. In a state where the first main switch 51 is turned off, the hexagonal portion 155 and the pin 5' of the upper portion of the operating lever 65 are engaged by the pressing springs 151. : On the one hand, when the first main switch 51 is turned on, and at the timing when the fixed contact 61 of the main switch 51 is in contact with the movable contact 60, the engagement of the pin 150 with the hexagonal portion 155 is released, and when When the pressure spring 151 is compressed, the load of the pressure receiving spring 151 is the contact force that becomes the contact of the first main switch 51. • The operation lever 65 is connected to the electromagnetic repulsive coil 1 7 构成 and the repulsive plate 1 7 1 constituting the disconnecting means. The electromagnetic repulsive force between the current acting on the electromagnetic repulsion line 圏1 7 0 and the eddy current of the repulsion plate 177 is generated by the excitation of the electromagnetic repulsion coil 170, eddy current. The reciprocating plate 177 is configured to be received by the member 64, and the operating lever 65 is moved upward in the first drawing by the same repulsive force. As shown in Fig. 3, the movable conductor 200 of the second main switch 52 is pin-connected to the member 202. The operating lever 204 has one end fixed to the member 202. The operating rod 204 is a pin 206 of the abutting -15-(12) (12) 1351705 surface that is machined by the lower ground plane. The nut 208' fixed to the pin 206 and the operating rod 202 becomes the clamping washer 210'. The spring 212 is connected to the washer 214. In a state where the second main switch 53 is turned off, the hexagonal portion 2 16 and the pin 206 of the upper portion of the operating lever 202 are engaged by the pressing spring 2 1 2 . On the one hand, 'the second main switch 53 is turned on, and at the timing when the fixed contact 220 of the main switch 53 is in contact with the movable contact 222, the engagement of the pin 206 with the hexagonal portion 216 is released' again. When the pressure spring 212 is pressed When compressed, the load of the pressure receiving spring 212 is the contact force of the contact of the second main switch 53, such as the operation lever 65 of the first main switch 51 and the second main body, as shown in FIG. 1 and FIG. The operating lever 202 of the switch 52 is driven in the operator box 300 by the electromagnets 301 arranged for the first main switch 5 and the second main switch 52. The shaft 302 of the electromagnet 301 is connected to one of the levers 501 of the main shaft 500 via the member 303. The other lever L03' of the main shaft 500 is coupled to the insulating rod 502 extending toward the first main switch 5 1 side. An insulating rod 504 extending from the side of the main switch 52. The insulating rod 502 is engaged with the pin 150 by the counter shaft 510, and the insulating rod 504 is engaged with the pin 206 by the counter shaft 512. That is, as shown in Figs. 1 and 3, the attractive force of the electromagnet 301 is via the spindle 500 and the levers 501, 503 and the counter shaft 510' 512 provided thereto and the levers 513, 514 provided there. It is transmitted to the operating lever 65 of the first main switch 51 and the operating lever 202 of the second main switch 52. To turn on the first main switch 5 1, the second main switch 5 2, the coil 3 05 in the electromagnet 3 0 1 is energized, and the plunger 3 04 can be driven in the lower direction of the drawing. The first sub-switch 5 3 is driven in conjunction with the first main switch 5 1 as described above, and -16 - (13) (13) 1351705 is driven, but in order to realize the operation timing described in FIG. 5, as shown in FIG. The connection member 530 and the lever 531»the connection member 530 and the lever 531 are connected to each other by the pin 533. The other end of the joint member 530 is connected to the counter shaft 510. On the other hand, the lever 531 is in a state of being rotatable about the shaft 532. When the first main switch 51 is turned off, the operating lever 65 moves in the upper direction in the first drawing to turn the first sub-switch 53 on, but the lever 531 rotates in the counterclockwise direction, and the engagement is set in the counterclockwise direction. The lever 531 and the pin 5 34 of the hinge 66 are pulled back to the movable conductor 69 of the first sub-switch 53 in the breaking direction (downward direction). The hole through which the pin 66 passes is formed in the hinge 66 in a rounded shape. Regardless of the position of the operating lever 65, the movable movable conductor 68 is formed in the breaking direction (downward direction). Further, reference numeral 70 is a spring for giving a contact force to the first sub-switch 53. As shown in Fig. 3, the connecting member 540 and the lever 541 are also provided on the second sub-switch 5 4 side. When the second main switch 52 is turned off, the lever 541 is rotated in the clock direction about the shaft 542, and the pin 543 and the lever 541 of the movable conductor 110 provided in the second sub-switch 54 are engaged, and the direction is the disconnection direction. Direction) moves the movable conductor 5 44. Further, reference numeral 71 denotes a spring for giving a contact force to the second sub-switch 54. The connecting members 530, 540 are made to change the length thereof, and the closing timing of the main switch and the sub-switch is adjusted by the same member. In Fig. 4, reference numeral 555 is a drive spring provided in the operator case 300 in conjunction with the spindle 500, reference numeral 5 90 is a capacitor for supplying excitation energy to the coil 305, and reference numeral 591 is a control indicating the electromagnet 301. -17- (15) 1351705 212 and the dancer spring 555 in the operator box 300 are accumulated, and the first main switch 51 and the second main switch 52 are opened. The first sub-switch 53 is in an open state with the engagement lever 531 and the pin 5 3 4, and the second sub-switch 54 is engaged with the pin 541 by the engagement of the lever 541 and the pin 543. When the closing operation is completed, the excitation of the electromagnet 301 is released. Pressure-receiving pressure springs 151, 212 and bounce

The reaction force of the spring 5 5 5 is maintained by the attraction force of the permanent magnet 306 inside the electromagnet 301. In the normal opening operation of the first main switch 51 and the second main switch 52, the coil 305 is excited in the opposite direction to the above-described closing operation. By the opposite excitation of the coil 305, the magnetic flux generated by the permanent magnet 306 is eliminated, and when the attractive force of the electromagnet 301 drops to the reaction force of the spring, the first main switch 51 and the second main switch 52 are started. Disconnecting action" In the event of a high-speed disconnection at the time of an accident, the electromagnetic electromagnetic repels the coil 170. By the electromagnetic repulsive force occurring on the repulsion plate 171, the operating lever 65 is moved in the upward direction by the more curved pressing spring 151, the first main switch 51 is turned off, and the first sub-switch 53 is turned On state. At this timing, the spindle 500 and the counter shaft 510 are inoperative, and the state of the second main switch 52 and the t-th main switch 54 are still maintained. " By the electromagnetic repulsive force of the electromagnetic repelling coil 1 70 by the repelling plate 171, when the operating lever 65 moves upward again, the lever 585 of the release mechanism 900 and the axis of the electromagnet 301 are engaged The pin 583' of 302 causes the electromagnetic repulsive force to be transmitted to the pin 583. When the transmission force and the load of the pressure springs 151, 212, and the load of the dancer spring 555 exceed the permanent magnet 19- (17) 1351705, the movable electrode is generated when the current is interrupted by the electromagnetic repulsion mechanism. The automatic reduction of the shaft can suppress the large-sized operation of the operating mechanism of the vacuum tube, and can quickly release the movable electrode side shaft generated during the current interruption caused by the electromagnetic repulsion mechanism with a slight force. Automatic reduction and adsorption of the permanent magnet of the vacuum tube operating mechanism and the movable iron core,

* A is the conduction of the vacuum tube to provide a highly reliable circuit breaker.

8 to 11 are views showing an embodiment of a three-phase high-speed circuit breaker 600 of the circuit breaker according to the present invention, and Fig. 8 is a right side sectional view showing a three-phase high-speed circuit breaker 600 of the circuit breaker according to the present invention. Figure 9 is a rear view 'Figure 10 is a front view, all in a conducting state. Fig. 11 is a side sectional view showing the state immediately before the electromagnet 301 is released. In these figures, the same symbols as those of Figs. 1 to 4 are the same parts. In these figures, the 3-phase high speed circuit breaker 600 is a vacuum tube 601 having contacts that are in contact with the inside. The fixed conductor 602 on the fixed electrode side of the vacuum tube 601 is located on the upper side and is connected to the fixed side feeder 603. On the other hand, the movable conductor 604 on the movable electrode side is disposed on the lower side via the condenser portion 6〇5, and is guided to the movable side feed line 606. Further, the movable conductor 604 is connected to one end of the insulating rod 607. The other end of the insulating rod 607 is fixed to the operating lever 608. The operating lever 608 is inserted into a pin 609 that is abutted on the upper and lower surfaces to be planarly machined. The pin 609 is a lever 503 in which one of the three phases is engaged with one of the single spindles 500. The retaining washer 611' is biased against the spring 612, washer 613 by a nut 610 fixed to the pin 60 9 and the operating lever 608. In the state where the vacuum tube 601 is disconnected -21 - (18) (18)

In 1351705, the pressure receiving spring 612 is in a state in which the portion 620 of the lower portion of the operating lever 608 and the pin 609 are engaged. On the one hand, in the guidance of the vacuum tube 6〇1, the engagement between the pin 609 and the hexagonal portion 620 of the fixed contact 621 and the movable 622 contacting the vacuum tube 601 is released, and the load of the spring 612 becomes the contact. The contact force θ is an electromagnetic repulsion coil and a repulsion plate 171 that communicate with the disconnecting means. By the exciting end of the electromagnetic repulsion coil 170, the electromagnetic repulsive force of the repulsion plate 1" 71 is the same as that of the above-described embodiment, and the structure is received by the insulating rod 607, and by the same repulsive force, the operation 608 is Move in the lower direction of the figure. The operating lever 607 is driven in the operator box 300 by the electromagnet 301 for the vacuum tube 601. The shaft 302 of the electromagnet 301 is connected to the other lever 501 of the spindle 500 via 303. Further, the attraction of the electric 301 is It is transmitted to the operating lever 607 via the spindle 500. When the vacuum tube 601 is passed, the coil 3 05 in the electromagnet 301 is energized, and the plunger 3 04 is driven in the lower middle direction. Below the spindle 500, the levers 503, 501, a release mechanism 90 0 for the electromagnet is provided. The release mechanism 900 of the electromagnet 301 is a perturbation lever 632 that is rotatable about the shaft 631, and a spiral that is often disposed between the interference levers 63 2 and 5 0 1 by rotating the interference lever 63 2 toward the 3 03 side. The lever mechanism of the spring 6 3 3 (refer to Fig. 7). The shaft 631 of the release mechanism 900 is disposed on the side of the electromagnetic iridium 301 in order to effectively exert the lever. One end of the interference lever 63 2 abuts against the member 303, and the other end of the interference lever 63 2 is located at the hexagonal communication contact pressure 170. The magnet is connected to the rod arrangement member. FIG. 301: Component lever The principle of construction is to operate the end of the hex portion 62 0 of the lower portion of the rod 608 of the -22-(19) 1351705. Hereinafter, the operation of an embodiment of the three-phase high-speed circuit breaker 600 of the above-described circuit breaker of the present invention will be described.

In the turn-on operation, the coil 305 of the electromagnet 301 is excited by the pre-charged capacitor 590 shown in Fig. 8, and the attraction force is generated in the plunger 304. The same attraction force is transmitted to the operating lever 607 via the spindle 500, and the movable conductor 604 is driven upward to turn on the vacuum tube 601. At the same time as the opening operation, the pressing spring 612 and the jumping spring 555 are stored and have an opening operation. When the closing operation is completed, the energization of the electromagnet 301 is released. The reaction force of the pressure-receiving pressure receiving spring 612 and the jump spring 555 is maintained by the attraction force of the permanent magnets 306 inside the electromagnet 301. The coil 305 is excited in the reverse direction during the normal opening operation of the vacuum tube 601 and the closing operation. The magnetic flux of the permanent magnet 306 is eliminated by the reverse excitation of the coil 305, and the opening of the vacuum tube 601 is started when the attraction of the electromagnet 301 drops to the reaction force of the spring. The high-speed disconnection of the vacuum tube 60 1 at the time of the accident, the electromagnetic repulsion coil 170 of the excitation breaking means. The one side of the electromagnetic repulsive force 'operating rod 60 7 of the repulsive plate 171 is moved more gently by the bending spring 612, so that the vacuum tube 601 is turned off. At this time, the spindle 500 does not move. As shown in Fig. 9, the operating lever 607 is moved downward by the electromagnetic repulsion, and the operating lever 60 7 collides with the interference lever 63 2, and the collision force is transmitted to the member 303. When the communication force and the load of the pressure spring 612 and the dancer spring 5 5 5 exceed the attraction force of the permanent magnet 3〇6, the plunger 304 -23-(20) (20)

1351705 Moves upwards. In response to this action, the high-speed circuit breaker. The entire mechanism is moved to the disconnected state. ^ The high-speed breaking of the vacuum tube 601 of the above-described disconnecting means reduces the force of the reaction force of the pressing spring 612 55 5 from the attraction force of the permanent magnet 306, and also exceeds the electromagnetic force for maintaining the excess force of the conduction state of t The repulsive force acts on the electromagnetic moving part. As is conventionally known, if the electromagnetic repulsive force is directly applied to the actuator, the release mechanism 900 constituted by the lever 632 with the shaft 631 is resolved in a dangerous form in which the reaction force is reconnected. As shown in Fig. 9, 900 is a lever principle that reduces the force of the movable portion of the electromagnet to L1/L2. That is, the electromagnet 301 can be released by a slight manipulation force due to release. As a result, the reaction ratio at 301 is reduced. Vacuum tube 601 can be avoided. Further, in the present embodiment, the impact force of the electromagnetic repulsive force for forming the individual path of the electromagnet for breaking the accident current for switching the load is large, and the degree of the member must be enhanced in order to correspond to the closing. . The enhanced strength is an increase in the quality of the shut-off, and in order to open and close at a high speed, it is necessary to strengthen the poor electrical cycle. It is sufficient to limit the high-speed disconnection to the durability of the accident current interruption to several tens of times, and it is possible to solve the problem that the electromagnet described in the above-described textbook embodiment can be disconnected from the vacuum tube 601 if it is reversed from the ON operation. 'Therefore, the operating path of 600, must be used and the spring coil 601 iron 301 can be used for electromagnetic. In the present embodiment, the electromagnet 3 0 1 releases the re-energized electromagnet of the electromagnet released by the mechanism 900, and the state. If the high-speed disconnection is connected to the magnetic repulsive force of the movable part, the number f is ensured. In addition, the electromagnet used in the negative -24- (21) 1351705 current-carrying circuit and the accident current is disconnected, and only the control method is changed without changing the components. According to this embodiment, as in the above-described embodiment, the automatic reduction of the movable electrode side shaft generated during the current interruption due to the electromagnetic repulsion mechanism can be reduced with a simple configuration, so that the vacuum tube can be suppressed. The size of the operating mechanism is large and can be quickly removed with a small amount of force.

The automatic reduction of the movable electrode side shaft generated by the electromagnetic repulsion mechanism during the current interruption causes the adsorption of the permanent magnet of the vacuum tube operating mechanism and the movable iron core, that is, the conduction of the vacuum tube, to provide a highly reliable circuit breaker Device. Figure 12 is a left side view showing another embodiment of the rectifying DC circuit breaker of the circuit breaker according to the present invention. In the twelfth embodiment, the same reference numerals as in the first embodiment are the same, and the detailed description thereof is omitted. . In this embodiment, the lever 5 1 3 located at the middle portion on the right side of Fig. 2 is disposed, and the other lever 1 is disposed. The lever 1A is provided on one side of the member 1 00 1 side of the operating lever 65 and the other side is located on the side of the insulating rod 52, and is rotatably provided to the lever 513 by the shaft 1 002. Therefore, when the high-speed disconnection due to the upward movement of the repulsion plate 171 of the disconnecting means is moved upward by the operation lever 65, the member 1001 abuts on one side of the lever 1000 at the position P, and the shaft 1002 serves as a fulcrum. Turn the lever 1000 in the counterclockwise direction. By the rotation of the lever 1000 in the counterclockwise direction, the other side of the lever 1 000 collides with the insulating rod 502 at the position Q. Thereby, the insulating rod 503 moves downward, and the lever 501 on the electromagnet side is rotated in the clock direction, and the electromagnet 301 is made to be released. As a result, the reaction force when the discharge magnet 301 is discharged is reduced, and the risk of reconnection of the main switch can be avoided.

According to this embodiment, as in the above-described embodiment, the automatic reduction of the movable electrode side shaft generated during the current interruption due to the electromagnetic repulsion mechanism can be reduced by a simple configuration, so that the operation of the vacuum tube can be suppressed. The size of the mechanism is increased, and the automatic reduction of the movable electrode side shaft generated during the current interruption caused by the electromagnetic repulsion mechanism can be quickly removed with a slight force, and the permanent magnet and the movable iron core of the operating mechanism of the vacuum tube are Adsorption, that is, conduction of a vacuum tube, can provide a highly reliable circuit breaker. Brief Description of the Drawings Fig. 1 is a left side view showing an embodiment of a rectifying DC circuit breaker of a circuit breaker according to the present invention. Fig. 2 is a rear elevational view showing an embodiment of a rectifying DC circuit breaker of the circuit breaker of the present invention shown in Fig. 1. Fig. 3 is a right side view showing an embodiment of a rectifying DC circuit breaker of the circuit breaker of the present invention shown in Fig. 1. Fig. 4 is a front elevational view showing an embodiment of a rectifying DC circuit breaker of the circuit breaker of the present invention shown in Fig. 1. Fig. 5 is a system circuit diagram showing an embodiment of a rectifying DC circuit breaker to which the circuit breaker of the present invention shown in Fig. 1 is applied. Fig. 6 is a timing chart showing an operation at the time of an accident in an embodiment of the rectifying DC circuit breaker of the circuit breaker of the present invention shown in Fig. 1. -26- (23) 1351705 Fig. 7 is a timing chart showing an operation at the normal operation of an embodiment of the rectifying DC circuit breaker of the circuit breaker of the present invention shown in Fig. 1. Fig. 8 is a right side sectional view showing a three-phase high speed circuit breaker of the circuit breaker of the present invention. Fig. 9 is a rear elevational view showing a three-phase high speed circuit breaker of the circuit breaker of the present invention shown in Fig. 8.

Fig. 10 is a front elevational view showing a three-phase high speed circuit breaker of the circuit breaker of the present invention shown in Fig. 8. Fig. 11 is a left side sectional view showing a three-phase high speed circuit breaker of the circuit breaker of the present invention shown in Fig. 8. Fig. 12 is a left side elevational view showing another embodiment of the rectifying DC circuit breaker of the circuit breaker of the present invention. [Symbol description of main components] 5: Rectifier DC circuit breaker 51: First main switch (vacuum tube) 1 7 〇: Electromagnetic repulsive coil 1 7 1 : Repellent plate 3 0 1 : Electromagnet 3 0 6 : Permanent magnet 600: High Speed Circuit Breaker 900: Release Mechanism -27-

Claims (1)

1351705 7-day repair (or) replacement page No. 0961201; No. 26 patent application Chinese patent application scope amendments The Republic of China 100 years August 9 曰 Amendment 10, the scope of application for patents 1_-type circuit breakers, belonging to: vacuum tube, and a circuit breaker that maintains the vacuum tube in an ON state by an attractive force of the permanent magnet, and a disconnecting means for driving the operating shaft of the operating mechanism in an opening direction by electromagnetic repulsive action, characterized in that: A release mechanism for releasing the conduction state of the vacuum tube by the operating mechanism is provided between the opening means and the operating means, in response to the opening operation by the opening means. A circuit breaker comprising: a vacuum tube; and a circuit breaker that opens the operating axis of the vacuum tube in an opening direction by electromagnetic repulsion, characterized by: having a coil, a movable iron core, and a permanent An electromagnet composed of a magnet includes: exciting the coil to perform an operation of closing the vacuum tube, and maintaining the vacuum tube in an ON state by an attractive force of the permanent magnet, and exciting the coil in a direction opposite to an ON operation The operating mechanism for the opening operation of the vacuum tube and the opening operation by the disconnecting means are performed, and a release mechanism including a link mechanism that is connected to the operating mechanism in a state in which the vacuum tube is turned on is released. 3. A circuit breaker' is a circuit breaker having a vacuum tube and a disconnecting means for driving an operating shaft of the vacuum tube in an opening direction by electromagnetic repulsion, characterized by having a coil, a movable iron core, and a permanent The electromagnet formed by the magnet includes: exciting the coil to perform an operation of turning on the vacuum tube, and maintaining the conduction state of the vacuum tube 1351705 by replacing the page with the suction force of the permanent magnet And an operation mechanism that excites the coil in the opposite direction to the closing operation and causes the vacuum tube to be opened, and an opening operation caused by the opening means, and disconnects the conduction state of the vacuum tube. A release mechanism formed by the lever mechanism of the above operating mechanism. A circuit breaker comprising: a circuit breaker having two switch groups including a main switch and a sub-switch operating in conjunction therewith, characterized in that: one of the switch groups is electromagnetically repulsive a breaking means for driving the operating shaft in the breaking direction, and an electromagnet comprising a coil, a movable iron core, and a permanent magnet, and exciting the coil to the two switch groups to perform an ON operation by the permanent magnet The driving force is maintained, and the operating mechanism that excites the coil in the opposite direction to the closing operation and performs the opening operation, and the opening operation due to the disconnecting means, cancels the main switch. In the on state, the release mechanism is connected to the link mechanism of the above-described operating mechanism. 5. A circuit breaker comprising: a circuit breaker comprising two switches of a main switch and a sub-switch operating in conjunction therewith, characterized in that: one of the switch groups is repulsed by electromagnetic a breaking means for driving the operating shaft in the breaking direction, and an electromagnet comprising a coil, a movable core, and a permanent magnet, and exciting the coil for the two switch groups to be turned on by the permanent magnet The attraction mechanism is maintained, and the operating mechanism that excites the coil in the opposite direction to the closing operation and performs the opening operation, and the opening operation due to the disconnecting means, cancels the main The opening state of the switch is connected to the release mechanism constituted by the lever mechanism of the above-described operating mechanism. -2- 1351* _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The disconnecting means and the operating mechanism are arranged. 7. The circuit breaker according to claim 4, wherein the release mechanism is provided with two switch groups that open the electromagnetic repulsion by the conduction means. Timing adjustment measures. 8. The circuit breaker according to claim 6, wherein the release means is provided with an adjustment means for adjusting the timing of the operation of the two switch groups which are opened by the electromagnetic repulsion by the conduction means. -3-