TWI752500B - Circuit breaker - Google Patents

Abstract

This invention provides a circuit breaker (1) having a mechanism unit (6) for performing on/off switching of a circuit, a command output unit (40) for operating the mechanism unit (6) to output an operation command, a switch unit (15) which operates in connection with the completion of operation of the mechanism unit according to an operation command, and an abnormality detection unit (16). The abnormality detection unit (16) detects the abnormality of the mechanism unit (6) according to a difference between the timing of the output of an operation command from the command output unit (40) and the timing of the operation of the switch unit (15).

Description

breaker

The present invention relates to a circuit breaker capable of determining an abnormality of a mechanism part for opening and closing a circuit.

Conventionally, a circuit breaker has a fixed contact, a movable contact, and a mechanism portion that performs an opening and closing operation for opening and closing a circuit. The mechanism part has a link mechanism, and by moving the movable contact by the link mechanism, the movable contact is brought into contact with the fixed contact, or the movable contact is separated from the fixed contact. Through the contact between the movable contact and the fixed contact, the circuit breaker is in a conducting state and the circuit is in a closed state. In addition, when the movable contact is separated from the fixed contact, the circuit breaker is in an off state and the circuit is in an open state.

The timing of the opening and closing operations of the mechanism part that moves the movable contact changes due to the increase in frictional force, the wear of mechanical parts, the entrapment of foreign objects, and the like. Therefore, the state of the mechanism portion can be determined from the temporal change of the opening and closing operations among the mechanism portions.

For example, Patent Document 1 discloses a technique in which, in a circuit breaker having an auxiliary contact opened and closed in conjunction with a closed-circuit operation of an operating mechanism, the state of the auxiliary contact changes according to the state of the auxiliary contact after an excitation command is input to the closed coil or the open coil. The time until the abnormality of the operating mechanism is detected. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Application Laid-Open No. 61-203820

[The problem to be solved by the invention]

However, in the technique described in the above-mentioned Patent Document 1, in order to monitor the intermediate state of the opening and closing operation among the mechanism parts, there is a possibility that an abnormality of the mechanism part performing the opening and closing operation cannot be accurately detected.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to obtain a circuit breaker capable of accurately detecting an abnormality in a mechanism portion that performs an opening and closing operation. [means to solve the problem]

In order to solve the above-mentioned problems and achieve the object, the circuit breaker of the present invention includes: a mechanism part for opening and closing a circuit; a command output part for outputting an operation command for operating the mechanism part; The switch part; and the abnormality detection part. The abnormality detection unit detects the abnormality of the mechanism unit based on the difference between the timing at which the operation command is output from the command output unit and the timing at which the switch unit operates. [Effect of invention]

According to the present invention, there is an effect of being able to accurately detect an abnormality of the mechanism portion that performs the opening and closing operations.

Hereinafter, a circuit breaker according to an embodiment of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to this embodiment.

Implementation type 1. FIG. 1 is a schematic diagram of a configuration example of a circuit breaker according to Embodiment 1 of the present invention. As shown in FIG. 1, the circuit breaker 1 includes: a fixed contact 4 electrically connected to a power source (not shown); a movable contact 5 electrically connected to a load (not shown); and a mechanism portion 6 that opens and closes a circuit .

The mechanism portion 6 includes an opening and closing mechanism portion 20 that performs the following operations: a closing action of bringing the movable contact 5 into contact with the fixed contact 4 to make the circuit in a closed state; Point 4 is separated to make the circuit form the open-pole action of the open-circuit state. Further, the mechanism portion 6 includes an open-pole coil portion 21 for causing the opening-closing mechanism portion 20 to perform a pole-opening operation, and a pole-closing coil portion 22 for causing the opening-closing mechanism portion 20 to perform a pole-closing operation. The opening and closing actions are the opening and closing actions.

In addition, the circuit breaker 1 includes: a converter 11 for converting energization current or leakage current flowing to a circuit; an OFF button 12 for opening the circuit; an ON button 13 for closing the circuit; and a drive The drive unit 14 of the mechanism unit 6 . The drive unit 14 includes a command output unit 40 that outputs an operation command for operating the mechanism unit 6 , and drives the open-pole coil unit 21 or the closed-pole coil unit 22 according to the operation command output from the command output unit 40 .

For example, when the open-pole command Do is output from the command output unit 40 as an operation command, the drive unit 14 causes an excitation current to flow to the coil of the open-pole coil unit 21 . Thereby, the pole-opening coil portion 21 mechanically acts on the opening-closing mechanism portion 20 to cause the opening-closing mechanism portion 20 to perform a pole-opening operation. In addition, when the command output unit 40 outputs the closed-pole command Dc as an operation command, the drive unit 14 causes an excitation current to flow to the coil of the closed-pole coil unit 22 . As a result, the closing coil portion 22 mechanically acts on the opening and closing mechanism portion 20, and the opening and closing mechanism portion 20 performs the closing operation.

FIG. 2 is a schematic diagram of an example of the configuration of the drive unit according to the first embodiment. As shown in FIG. 2 , the drive unit 14 includes: the above-mentioned command output unit 40 ; a rectifier circuit 41 that full-wave rectifies the AC voltage from the AC power source 8 and outputs the full-wave rectified voltage; During the output period, the switching element 42 is connected in series with the open-pole coil portion 21 . Further, the drive unit 14 includes a switching element 43 that is connected in series with the closed-pole coil unit 22 during the output period of the rectifier circuit 41 . The switching elements 42 and 43 are, for example, MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistor).

The command output unit 40 includes an open-pole command output unit 44 and a closed-pole command output unit 45 . The pole-opening command output unit 44 outputs the pole-opening command Do when the OFF button 12 is operated, or when the energization current or the leakage current is greater than or equal to a preset value. The fact that the energization current is greater than or equal to the preset value refers to a state of overcurrent. The closing command output unit 45 outputs the closing command Dc when the ON button 13 is operated. The pole-opening command Do and the pole-closing command Dc are, for example, pulse signals of a High level for a period longer than a predetermined time.

Returning to Fig. 1, the description of the circuit breaker 1 is continued. The circuit breaker 1 includes: a switch unit 15 that operates in conjunction with the completion of the operation of the mechanism unit 6 according to the operation command; an abnormality detection unit 16 that detects an abnormality of the mechanism unit 6; The notification unit 17 of abnormality detected by the abnormality detection unit 16 . The abnormality detection unit 16 detects the abnormality of the mechanism unit 6 based on the signal output from the switch unit 15 and the operation command output from the command output unit 40 .

The notification unit 17 includes, for example, a display unit and a speaker, and can display an abnormality on the display unit or output a warning sound from the speaker. In addition, the display portion may be a warning light, or may be a display such as an LCD (Liquid Crystal Display; liquid crystal display). In addition, the notification part 17 is not limited to a display part, a speaker, etc., as long as it can notify abnormality.

The switch portion 15 includes a first switch 31 that operates in conjunction with the completion of the pole-opening operation of the mechanism portion 6 , and a second switch 32 that operates in conjunction with the completion of the pole-closing operation of the mechanism portion 6 . Further, the switch portion 15 includes a third switch 33 that operates in conjunction with the completion of the action of the opening coil portion 21 on the opening and closing mechanism portion 20 , and a third switch 33 that operates in conjunction with the action of the closing coil portion 22 to the opening and closing mechanism portion 20 . The fourth switch 34 that operates in conjunction is completed.

The first switch 31 , the second switch 32 , the third switch 33 , and the fourth switch 34 are, for example, micro switches fabricated as small switches, respectively. The micro switch is equipped with a contact mechanism with a small contact interval and an instantaneous action mechanism, and the contact mechanism performs opening and closing operations with a predetermined action and a predetermined force. The contact mechanism is covered by a casing. In addition, the microswitch includes an actuator outside the contact mechanism. The momentary action mechanism is a mechanism that instantaneously switches contacts at a certain operating position with respect to the actuator, regardless of the operating speed and operating force with respect to the actuator.

Micro switches are also known as Precision Snap Action Switches or Sensitive Switches. In addition, each of the first switch 31, the second switch 32, the third switch 33, and the fourth switch 34 may be constituted by switches other than micro switches.

The abnormality detection unit 16 detects the abnormality of the mechanism unit 6 based on the difference between the timing of outputting the operation command from the command output unit 40 and the timing of the operation of the switch unit 15 . For example, when the difference between the timing of outputting the pole opening command Do from the command output section 40 and the timing of the operation of the first switch 31 is outside the first range R1, the abnormality detection section 16 determines that the pole opening operation of the mechanism section 6 is abnormal. When the difference between the timing of outputting the pole-opening command Do from the command output section 40 and the timing of operating the first switch 31 is within the first range R1, the abnormality detection unit 16 determines that the pole-opening operation of the mechanism unit 6 is not abnormal.

When the difference between the timing at which the closing command Dc is output from the command output unit 40 and the timing at which the second switch 32 operates is outside the second range R2, the abnormality detecting unit 16 determines that the closing operation of the mechanism unit 6 is abnormal. When the difference between the timing at which the closing command Dc is output from the command output unit 40 and the timing at which the second switch 32 operates is within the second range R2, the abnormality detecting unit 16 determines that the closing operation of the mechanism unit 6 is not abnormal.

In this way, the circuit breaker 1 detects the abnormality of the mechanism portion 6 based on the operation and the operation command of the switch portion 15 that operates in conjunction with the completion of the operation of the mechanism portion 6 , and therefore, it is compared to monitoring the state in the middle of the opening and closing operation of the mechanism portion 6 . In this case, the abnormality of the mechanism portion 6 can be detected with high accuracy. In the case of detecting the abnormality of the mechanism portion 6 by monitoring the intermediate state of the opening and closing operation of the mechanism portion 6, the period from the intermediate state of the opening and closing operation of the mechanism portion 6 to the completion of the operation of the mechanism portion 6 is not monitored. The abnormality of the mechanism part 6 during this period cannot be detected. On the other hand, since the circuit breaker 1 can monitor the period until the operation of the mechanism portion 6 is completed, the abnormality of the mechanism portion 6 can be accurately detected.

When the difference between the timing of outputting the open pole command Do from the command output section 40 and the timing of operating the third switch 33 is outside the third range R3, the abnormality detection section 16 can determine that the open pole coil section 21 has an abnormality. When the difference between the timing at which the closing command Dc is output from the command output unit 40 and the timing at which the fourth switch 34 operates is outside the fourth range R4, the abnormality detecting unit 16 can determine that the closing coil unit 22 is abnormal. In this way, the circuit breaker 1 can individually detect the abnormality of the open-pole coil part 21 and the closed-pole coil part 22 of the mechanism part 6 .

Here, the configuration of the opening and closing mechanism unit 20 will be described. FIG. 3 is a cross-sectional view of the circuit breaker when the circuit breaker according to Embodiment 1 is in an open state in which charging is completed. FIG. 4 is a cross-sectional view of the circuit breaker when the circuit breaker according to Embodiment 1 is in a closed state in which discharge is completed. FIG. 5 is a cross-sectional view of the circuit breaker when the circuit breaker according to Embodiment 1 is in a closed state in which charging is completed. FIG. 6 is a cross-sectional view of the circuit breaker when the circuit breaker according to Embodiment 1 is changed from a closed state in which charging is completed to an open state in which charging is completed. In addition, FIGS. 3-6 mainly show the structure of the opening and closing mechanism part 20 in the circuit breaker 1, and do not show the partial structure of the circuit breaker 1. FIG. In addition, in the following description, the clockwise direction and the counterclockwise direction refer to the clockwise direction and the counterclockwise direction on the plane including FIGS. 3 to 6 .

As shown in FIG. 3 , the circuit breaker 1 includes an insulating case 7 ; a power source side fixed terminal 2 on which fixed contacts 4 are arranged; a load side fixed terminal 3 ; and a movable contactor 50 on which movable contacts 5 are arranged. In addition, the circuit breaker 1 includes: one end is fixed to the load-side fixed terminal 3, the other end is fixed to the movable contactor 50, and the other end is fixed to the flexible conductor 51 having flexibility; The pressure contact spring 52; and the opening and closing mechanism part 20 which is accommodated in the casing 7 and performs the opening and closing of the circuit.

When the fixed contact 4 is in contact with the movable contact 5 , the load-side fixed terminal 3 and the power-side fixed terminal 2 are electrically connected via the flexible conductor 51 . The movable contactor 50 on which the movable contact 5 is arranged is driven by the opening and closing mechanism unit 20 .

The opening and closing mechanism unit 20 includes a frame 53 fixed to the casing 7 and a cam 54 that is rotatably supported by the frame 53 and rotates counterclockwise in conjunction with the rotation of a handle (not shown). Further, the opening/closing mechanism part 20 includes a guide plate 55 whose one end is attached to the frame 53 and extends upward; a closing spring 56 attached to the guide plate 55; .

A snap pin 47 provided at one end of the accumulating arm 57 is inserted into an elongated hole formed in the guide plate 55 . One end of the closing spring 56 is in contact with the snap pin 47 , and the other end is in contact with the frame 53 . In addition, the arm-side roller 57 a provided at the other end of the energy storage arm 57 abuts on the cam surface of the cam 54 . The cam 54 is provided with a cam side roller 54a.

Further, the opening and closing mechanism portion 20 includes: a first closing latch 58 supported by the frame 53 in a rotatable state; a second closing latch 59 supported by the frame 53 in a rotatable state; and supported by the frame 53 in a rotatable state, and a Parts form a semi-cylindrical closed rod 60 . The front end of the first closing latch 58 is in contact with the cam side roller 54a. The latch-side roller 58 a provided in the first closing latch 58 is in contact with the lower end of the second closing latch 59 .

The opening and closing mechanism part 20 includes: a link mechanism 61, a link rod 62 supported by the frame 53 in a rotatable state; a release latch 63 supported by the frame 53 in a rotatable state; A trip bar 64 to which one end of the latch 63 is engaged. The link mechanism 61 includes a first link 68 and a second link 69 . One end of the first link 68 and one end of the second link 69 are connected by a bolt (not shown).

The other end of the second link 69 is connected to the other end of the second link arm portion 65 by the latch 67 . The second link arm portion 65 is fixed to a main shaft 66 , and the main shaft 66 is rotatably supported by the frame 53 . One end of the link tie rod 62 is connected to the other end of the first link 68 by a bolt (not shown), and a tie rod side roller 62a is provided in the middle part between the one end and the rotation center. The side surface of the release latch 63 is engaged with the rod-side roller 62a.

FIG. 7 is a schematic diagram of the relationship among the main shaft, the insulating link arm, and the insulating link according to Embodiment 1, and only shows the configuration of a part of the opening and closing mechanism unit 20 . As shown in FIG. 7 , the opening/closing mechanism unit 20 includes a main shaft 66 ; an insulating link arm part 70 fixed to the main shaft 66 ; and a second connection fixed to the main shaft 66 and arranged between the insulating link arm parts 70 . The lever arm portion 65 . Three base ends of the insulating link arm portions 70 are arranged at equal intervals on the main shaft 66 along the extending direction. The shapes of the insulating link arm portion 70 and the second link arm portion 65 are the same as each other. The arm portion 70 for an insulating link is rotatably coupled to one end of the insulating link 72 shown in FIG. 4 by a latch 71 . The other end of the insulating link 72 is connected to the movable contactor 50 .

In the state shown in FIG. 3 , when the pole closing coil part 22 performs the pole closing operation according to the pole closing command Dc from the command output part 40 , as shown in FIG. 4 , the closing rod 60 rotates in the clockwise direction. The locking of the second closing latch 59 of the closing rod 60 is released. After the unlocked second closing latch 59 is rotated clockwise, the engagement between the lower end of the second closing latch 59 and the latch-side roller 58a is released. Therefore, since the cam 54 rotates counterclockwise while rotating the first closing latch 58 counterclockwise by the cam side roller 54a, the arm side roller 57a falls into the step portion of the cam surface of the cam 54.

The energy storage arm 57 is rotated in the counterclockwise direction by the release of the elastic force of the closing spring 56 , and the middle part of the link mechanism 61 is bounced up. Since the trip bar 64 is locked by the action of the trip latch 63 in the counterclockwise direction, the link mechanism 61 is extended and the second link arm 65 is rotated in the counterclockwise direction. Thereby, as shown in FIG. 4, in the circuit breaker 1, the movable contact 5 and the fixed contact 4 are brought into contact, and the circuit is in a closed state.

From the state shown in FIG. 4 , when the handle not shown is manually operated or the electric motor not shown is rotated, the cam 54 rotates counterclockwise. Therefore, the arm side roller 57a moves while rotating along the cam surface of the cam 54, and the accumulating arm 57 rotates clockwise. As a result, as shown in FIG. 5 , the snap pin 47 provided at one end of the accumulating arm 57 moves downward, so that the closing spring 56 accumulates elastic force.

Next, the pole-opening operation for moving the circuit breaker 1 from the state shown in FIG. 5 to the open state will be described. When the circuit breaker 1 is in the state shown in FIG. 5, when the pole-opening coil part 21 performs the pole-opening operation according to the pole-opening command Do of the command output part 40, as shown in FIG. 6, the trip bar 64 is oriented counterclockwise. Rotating in the direction, the locking of the tripping latch 63 by the tripping rod 64 is released. After the unlocked release latch 63 is rotated counterclockwise, the engagement between the release latch 63 and the pull rod side roller 62a is released.

Therefore, the link rod 62 is rotated in the clockwise direction. The other end of the first link 68 is pulled up by the clockwise rotation of the link lever 62 , so that the relationship between the first link 68 and the second link 69 is broken, and the main shaft 66 rotates clockwise. Thereby, the movable contact 5 is separated from the fixed contact 4, and the circuit is in an open state.

The first switch 31 shown in FIG. 1 is arranged in the circuit breaker 1 so as to operate in conjunction with the completion of the pole-opening operation of the opening and closing mechanism portion 20 . Specifically, the first switch 31 has a structure in which the contacts are separated from each other when the opening and closing mechanism portion 20 changes from the state shown in FIG. 5 to the state shown in FIG. 6 . For example, the actuator is mounted on the The member of the main shaft 66 operates. In addition, the 1st switch 31 may be the structure which contacts with each other when the opening/closing mechanism part 20 changes from the state shown in FIG. 5 to the state shown in FIG. 6. FIG.

Moreover, the 2nd switch 32 is arrange|positioned in the circuit breaker 1 so that it may operate in conjunction with the completion|finish of the closing operation of the opening/closing mechanism part 20. FIG. Specifically, the second switch 32 has a configuration in which the contacts come into contact with each other when the opening and closing mechanism portion 20 is changed from the state shown in FIG. 3 to the state shown in FIG. 4 . For example, the actuator is mounted on the main shaft by 66 components to act. In addition, the 2nd switch 32 may be the structure which isolate|separates a contact point, when the opening/closing mechanism part 20 changes from the state shown in FIG. 3 to the state shown in FIG. 4. FIG.

Moreover, the 3rd switch 33 is arrange|positioned in the circuit breaker 1 so that it may operate in conjunction with the completion|finish of the operation of the opening-closing mechanism part 20 by the pole-opening coil part 21. FIG. For example, when the open-pole coil portion 21 has a configuration including an electromagnetic solenoid, the third switch 33 changes the trip bar 64 from the state shown in FIG. 5 at the moving position of the plunger of the open-pole coil portion 21 In the case of the position shown in Fig. 6, the contacts are separated from each other. The third switch 33 is, for example, a member for operating an actuator by a plunger attached to the open-pole coil portion 21 . In addition, the third switch 33 may be a contact point when the movement position of the plunger of the open-pole coil portion 21 is at a position where the trip bar 64 changes from the state shown in FIG. 5 to the state shown in FIG. 6 . composition that will come into contact with each other.

Moreover, the 4th switch 34 is arrange|positioned in the circuit breaker 1 so that it may operate in conjunction with the completion of the action of the closing coil part 22 on the opening and closing mechanism part 20 . For example, when the closing coil portion 22 has a configuration including an electromagnetic solenoid, the fourth switch 34 changes the closing rod 60 from the state shown in FIG. In the case of the position in the state shown in Fig. 4, the contact points are in contact with each other. The fourth switch 34 is, for example, a member for operating an actuator by a plunger attached to the closed-pole coil portion 22 . In addition, the fourth switch 34 may be in a position where the closing rod 60 changes from the state shown in FIG. 3 to the state shown in FIG. 4 when the moving position of the plunger of the closing coil part 22 is the state shown in FIG. 4 . composition that will be contacted.

Next, the structure of the abnormality detection part 16 shown in FIG. 1 is demonstrated concretely. FIG. 8 is a schematic diagram of a configuration example of an abnormality detection unit according to Embodiment 1. FIG. As shown in FIG. 8 , the abnormality detection unit 16 includes: a difference calculation unit 81 that calculates the difference between the signal output from the switch unit 15 and the operation command output from the command output unit 40 ; a memory unit 82 that stores range information; The abnormality determination unit 83 of the mechanism unit 20 . The determination part 83 determines the abnormality of the opening-and-closing mechanism part 20 based on the comparison result of the difference computed by the difference computing part 81 and the range information memorize|stored in the memory|storage part 82.

The difference calculation unit 81 includes a first calculation unit 84 ₁ , a second calculation unit 84 ₂ , a third calculation unit 84 ₃ , a fourth calculation unit 84 ₄ , a fifth calculation unit 84 ₅ , and a sixth calculation unit 84 ₆ . The first calculation unit 84 ₁ calculates the difference ΔTc1 between the timing at which the open-pole command Do is output from the command output unit 40 and the timing at which the first switch 31 operates. The timing at which the first switch 31 operates is the timing at which the signal So1 output from the first switch 31 changes from the High level to the Low level.

The second calculation unit 84 ₂ calculates the difference ΔTc2 between the timing at which the closing command Dc is output from the command output unit 40 and the timing at which the second switch 32 operates. The timing at which the second switch 32 operates is the timing at which the signal So2 output from the second switch 32 changes from the Low level to the High level.

The third calculation unit 84 ₃ calculates the difference ΔTc3 between the timing at which the open-pole command Do is output from the command output unit 40 and the timing at which the third switch 33 operates. The timing at which the third switch 33 operates is the timing at which the signal So3 output from the third switch 33 changes from the High level to the Low level.

Fourth calculation timing calculation section ₈₄₄ is output from the command output unit 40 Dc closure command timing switch 34 and the operation of the fourth difference ΔTc4. The timing at which the fourth switch 34 operates is the timing at which the signal So4 output from the fourth switch 34 changes from the Low level to the High level.

31 ΔTc5 operation timing difference between the first and the fifth switch ₅ operation unit 84 of the third switch 33 of the operation timing. ΔTc6 timing difference between the second switch 32 and the operation of the sixth arithmetic unit ₈₄₆ calculating a fourth switch 34 of the operation timing.

The storage unit 82 stores: the first range information representing the first range R1; the second range information representing the second range R2; the third range information representing the third range R3, the fourth range information representing the fourth range R4; 5th range information of the 5th range R5; and 6th range information indicating the 6th range R6. The range information stored in the memory unit 82 can be set or updated by input from an input unit (not shown).

The determination unit 83 includes a first determination unit 85 ₁ , a second determination unit 85 ₂ , a third determination unit 85 ₃ , a fourth determination unit 85 ₄ , a fifth determination unit 85 ₅ , and a sixth determination unit 85 ₆ . The determination unit 83 reads the first range information, the second range information, the third range information, the fourth range information, the fifth range information, and the sixth range information from the memory unit 82, and calculates based on the read information and the difference An abnormality of the opening and closing mechanism unit 20 is determined based on the calculation result of the unit 81 .

Specifically, the first determination unit ₈₅₁ in the case of calculating the difference between the first ΔTc1 calculation unit ₈₄₁ is outside a first range Rl, the opening operation mechanism is determined as abnormal portions 6, the difference in the range of 1 ΔTc1 In the case of R1, it is determined that the pole-opening operation of the mechanism section 6 is not abnormal. The second determination unit ₈₅₂ in the case where the difference ΔTc2 second calculation unit ₈₄₂ of the operation is outside the second range R2, it is determined closing actuation mechanism portion 6 is abnormal, where the difference ΔTc2 in the range of 2 R2 is , it is determined that the closing action of the mechanism portion 6 is not abnormal.

Third determination section ₈₅₃ in the case of the third arithmetic unit difference ΔTc3 84 ₃ of the operation is outside the range of 3 R3, the determination is open pole coil unit 21 is abnormal, the difference ΔTc3 is the case within the scope of the third R3, determined The open-pole coil portion 21 is not abnormal. Fourth determination unit ₈₅₄ in the case of the fourth calculation portion difference ΔTc4 84 ₄ operations is outside the range of 4 R4 determines the closed electrode coil portion 22 is abnormal, the difference ΔTc4 case where the range of 4 R4, determined It is not abnormal that the coil portion 22 is closed.

A fifth determining section ₈₅₅ in the case where the difference between the ₈₄₅ arithmetic fifth arithmetic unit ΔTc5 the range of 5 R5 outside, it is determined that the opening and closing mechanism portion opening operation abnormality, the difference ΔTc5 the range of 5 R5 of 20 In this case, it is determined that the pole-opening operation of the opening and closing mechanism portion 20 is not abnormal. Sixth determining section ₈₅₆ in the case where the difference between the ₈₄₆ arithmetic sixth arithmetic unit ΔTc6 the range of 6 R6 outside, determines that the closing actuation mechanism portion 20 is opened and closed is abnormal, the difference ΔTc6 in the range of 6 R6 is In this case, it is determined that the closing operation of the opening and closing mechanism portion 20 is not abnormal.

Here, the current flowing to the circuit, and the state changes of the opening and closing mechanism portion 20 , the open-pole coil portion 21 , and the switch portion 15 will be described. First, a state change during the pole-opening operation of the mechanism section 6 will be described. FIG. 9 is a schematic diagram showing the state changes of the current flowing to the circuit, the switching mechanism part, the pole opening coil part, the first switch and the third switch during the pole opening operation of the circuit breaker according to the first embodiment.

As shown in FIG. 9 , when the circuit breaker 1 is in the closed state, at time t1 , when the pole-opening command Do is output from the command output unit 40 , the plunger in the pole-opening coil section 21 moves, and at time t2 , the pole is moved. The moving position of the plug becomes the action completion position. "Stroke of the pole-opening coil part" shown in FIG. 9 represents the movement position of the plunger in the pole-opening coil part 21, and changes from the operation start position to the operation completion position. At time t2, when the pole-opening operation of the pole-opening coil portion 21 is completed and the movement position of the plunger becomes the operation completion position, the signal So3 output from the third switch 33 changes from the High level to the Low level.

When the movement position of the plunger in the open-pole coil portion 21 becomes the operation completion position, the trip bar 64 is rotated by the plunger of the open-pole coil portion 21, the latch of the opening and closing mechanism portion 20 is released, and the At time t2, the pole-opening operation of the opening-closing mechanism portion 20 starts. When the pole-opening operation of the opening and closing mechanism portion 20 is started, the stroke of the opening and closing mechanism portion 20 is moved from the first position to the second position. The stroke of the opening and closing mechanism portion 20 represents the movement position of the other end of the second link 69, and changes from the first position to the second position. When the link mechanism 61 is in the state shown in FIG. 5, the stroke of the opening and closing mechanism part 20 is the first position, and when the link mechanism 61 is in the state shown in FIG. 6, the stroke of the opening and closing mechanism part 20 is the second position Location.

When the stroke of the opening/closing mechanism part 20 changes from the first position to the second position, the fixed contact 4 and the movable contact 5 are separated, but an arc is generated between the fixed contact 4 and the movable contact 5 . Therefore, after the fixed contact 4 and the movable contact 5 are separated from each other for a certain period of time, the current will continue to flow between the fixed contact 4 and the movable contact 5 . In addition, the fixed time varies depending on the voltage, current, and phase between the fixed contact 4 and the movable contact 5 .

Next, at time t3, the arc between the fixed contact 4 and the movable contact 5 disappears, and the circuit is in an open state. In addition, at time t4, the stroke of the opening and closing mechanism portion 20 reaches the second position, and the pole-opening operation of the opening and closing mechanism portion 20 is completed. When the stroke of the opening and closing mechanism portion 20 reaches the second position, the signal So1 output from the first switch 31 changes from the High level to the Low level.

The first calculation unit abnormality detection unit 16 is ₈₄₁ calculated from an output command output unit 40 open during poor pole instructions Do time t1 and the time from the signal So1 of the first switch 31 becomes a Low level from the High level to t4, T1 as the difference ΔTc1. The first determination unit abnormality detection unit 16 is ₈₅₁ in the period T1 of conditions outside the range of the first Rl, determines that the opening operation mechanism portion 6 is abnormal, the period T1 is the case within the scope of the first Rl, determines that the mechanism The pole-opening operation of the section 6 is not abnormal.

In this way, the abnormality detection unit 16 determines the abnormality of the pole-opening operation of the mechanism unit 6 during the time period after the output of the pole-opening command Do until the completion of the pole-opening operation of the mechanism unit 6 . Therefore, the abnormality of the pole-opening operation of the mechanism portion 6 can be detected more accurately than the case of monitoring the state in the middle of the pole-opening operation of the mechanism portion 6 . The abnormality detection unit 16 can accurately detect abnormality in the pole-opening operation of the mechanism unit 6 due to changes in the static frictional force and the dynamic frictional force among the opening and closing mechanism units 20 . In addition, the abnormality detection unit 16 can accurately detect an abnormality in the pole-opening operation of the mechanism unit 6 caused by the foreign matter stuck in the mechanism unit 6 .

Further, the third calculating portion abnormality detection unit 16 is ₈₄₃ calculates the opening hour of the instruction Do is output from the command output unit 40 t1 the signal So3 from the third switch 33 from High level into time Low level difference t2 is The period T3 serves as the difference ΔTc3. Third determination unit abnormality detection unit 16 is ₈₅₃ in the period T3 of conditions outside the range of 3 R3, it is determined that the opening-pole coil unit 21 is abnormal, in the period T3 is the case within a range of 3 R3, determines that open-pole coil Section 21 is not abnormal. In this way, the circuit breaker 1 can individually detect the abnormality of the pole-opening operation of the pole-opening coil portion 21 of the mechanism portion 6 .

_{Further, the fifth} calculation unit 845 of the abnormality detection unit 16 calculates the time t2 when the signal So3 from the third switch 33 changes from the High level to the Low level and the signal So1 from the first switch 31 changes from the High level to the Low level The period T5 of the difference at the time t4 is set as the difference ΔTc5. A fifth determining section abnormality detection unit 16 is ₈₅₅ during T5 of conditions outside the range of 5 R5, it determines that the contact opening operation of the opening and closing mechanism portion 20 is abnormal, in the period T5 is the case within a first range 5 R5, is determined The pole-opening operation of the opening-closing mechanism portion 20 is not abnormal. In this way, the circuit breaker 1 can individually detect the abnormality of the pole-opening operation of the opening and closing mechanism portion 20 among the mechanism portions 6 .

Next, the current flowing to the circuit during the closing operation of the mechanism portion 6 , and the state changes of the opening and closing mechanism portion 20 , the closing coil portion 22 , and the switch portion 15 will be described. Fig. 10 is a schematic diagram showing the state changes of the current flowing to the circuit, the opening and closing mechanism part, the closing coil part, the second switch and the fourth switch during the closing operation of the circuit breaker according to the first embodiment.

As shown in FIG. 10, when the circuit breaker 1 is in the open state, when the closing command Dc is output from the command output unit 40 at time t11, the plunger in the closing coil unit 22 moves, and at time t12, the plunger moves. The moving position of the plug becomes the action completion position. The “stroke of the closed-pole coil portion” shown in FIG. 10 represents the movement position of the plunger in the closed-pole coil portion 22 , and changes from the operation start position to the operation completion position. At time t12, when the closing operation of the closing coil portion 22 is completed and the movement position of the plunger becomes the operation completion position, the signal So4 output from the fourth switch 34 changes from the Low level to the High level.

In addition, when the moving position of the plunger in the pole-closing coil part 22 becomes the operation completion position, the closing rod 60 is rotated by the plunger of the pole-closing coil part 22, the latch of the opening and closing mechanism part 20 is released, and at time During t12, the closing operation of the opening and closing mechanism portion 20 starts.

When the closing operation of the opening and closing mechanism portion 20 starts, at time t13 in the middle of the stroke of the opening and closing mechanism portion 20 changing from the second position to the first position, the current starts before the fixed contact 4 and the movable contact 5 come into contact with each other. flow. The current starts to flow before the fixed contact 4 and the movable contact 5 come into contact because when the distance between the fixed contact 4 and the movable contact 5 becomes shorter, due to the The voltage will cause insulation breakdown between the fixed contact 4 and the movable contact 5 .

Next, at time t14, the stroke of the opening and closing mechanism portion 20 reaches the first position, and the pole-closing operation of the opening and closing mechanism portion 20 is completed. When the stroke of the opening and closing mechanism portion 20 reaches the first position, the signal So2 output from the second switch 32 changes from the Low level to the High level.

During poor second calculating portion abnormality detection unit 16 is ₈₄₂ calculated from an output command output section 40 closure command Dc is time t11 and the signal from the second switch 32 So2 becomes High level from Low level to time t14 T2 as the difference ΔTc2. The second determination unit abnormality detection unit 16 is ₈₅₂ in the period T2 of conditions outside the range of the second R2, determines that the closing actuation mechanism portion 6 is abnormal, in the period T2 is the case within the scope of the second R2, it is determined that means The pole-closing action of the part 6 is not abnormal.

In this way, the abnormality detection unit 16 determines an abnormality in the closing operation of the mechanism unit 6 during the time period after the output of the closing command Dc until the closing operation of the mechanism unit 6 is completed. Therefore, the abnormality of the closing operation of the mechanism part 6 can be detected more accurately than in the case of monitoring the state in the middle of the closing operation of the mechanism part 6 . The abnormality detection unit 16 can accurately detect an abnormality in the closing operation of the mechanism unit 6 due to changes in the static frictional force and the dynamic frictional force of the opening and closing mechanism unit 20 . In addition, the abnormality detection unit 16 can accurately detect an abnormality in the closing operation of the mechanism unit 6 caused by the foreign matter being caught in the mechanism unit 6 .

In addition, the _fourth calculation unit 844 of the abnormality detection unit 16 calculates the difference between the time t11 when the closing command Dc is output from the command output unit 40 and the time t12 when the signal So2 from the second switch 32 changes from the Low level to the High level. The period T4 serves as the difference ΔTc4. Fourth determination unit abnormality detection unit 16 is ₈₅₄ in the period T4 of conditions outside the range of 4 R4, it is determined that the closed electrode coil portion 22 is abnormal, in the period T4 is the case within a first range 4 R4, it is determined that the closed-pole coil Section 22 is not abnormal. In this way, the abnormality detecting unit 16 of the circuit breaker 1 can individually detect the abnormality of the closing operation of the closing coil unit 22 of the mechanism unit 6 .

In addition, the _sixth calculation unit 846 of the abnormality detection unit 16 calculates the time t12 when the signal So4 from the fourth switch 34 changes from the Low level to the High level and the signal So2 from the second switch 32 changes from the Low level to the High level. The period T6 of the difference at the time t14 is regarded as the difference ΔTc6. Sixth determining section abnormality detection unit 16 is ₈₅₆ in the period T6 of conditions outside the range of 6 R6, it is determined that the contact closing operation of the opening and closing mechanism portion 20 is abnormal, in the period T6 is the case within a first range 6 R6, is determined The closing operation of the opening and closing mechanism portion 20 is not abnormal. In this way, the abnormality detection unit 16 of the circuit breaker 1 can individually detect the abnormality of the closing operation of the opening/closing mechanism unit 20 among the mechanism units 6 .

Next, the process performed by the abnormality detection part 16 of the circuit breaker 1 is demonstrated using a flowchart. FIG. 11 is a flowchart showing an example of processing performed by the abnormality detection unit when the circuit breaker of Embodiment 1 is in an ON state. In addition, the process shown in FIG. 11 is repeatedly performed by the abnormality detection part 16, when the circuit breaker 1 is in the ON state.

As shown in FIG. 11, the abnormality detection unit 16 determines whether or not an open-pole command Do is output from the command output unit 40 (step S10). The abnormality detection unit 16 determines that the pole-opening command Do is output (step S10: YES), and calculates the difference ΔTc1 between the timing at which the pole-opening command Do is output and the timing at which the first switch 31 operates (step S11).

The abnormality detection unit 16 determines whether or not the difference ΔTc1 calculated in step S11 is within the first range R1 (step S12 ). When the abnormality detection unit 16 determines that the difference ΔTc1 is not within the first range R1 (step S12 : NO), the abnormality detection unit 16 determines that the pole-opening operation of the mechanism unit 6 is abnormal, and outputs a message indicating the pole-opening operation of the mechanism unit 6 from the notification unit 17 . Abnormal information (step S13).

When the abnormality detection unit 16 completes the processing of step S13, or when it is determined that the difference ΔTc1 is within the first range R1 (step S12: YES), the timing for outputting the pole-opening command Do and the timing for operating the third switch 33 are calculated. difference ΔTc3 (step S14). The abnormality detection unit 16 determines whether or not the difference ΔTc3 calculated in step S14 is within the third range R3 (step S15 ). When the abnormality detection unit 16 determines that the difference ΔTc3 is not within the third range R3 (step S15 : NO), the abnormality detection unit 16 determines that the open-pole coil unit 21 is abnormal, and outputs information indicating the abnormality of the open-pole coil unit 21 from the notification unit 17 ( step S16).

When the abnormality detection unit 16 completes the processing of step S16, or when it is determined that the difference ΔTc3 is within the third range R3 (step S15: YES), the timing of the operation of the third switch 33 and the timing of the operation of the first switch 31 are calculated. difference ΔTc5 (step S17). The abnormality detection unit 16 determines whether or not the difference ΔTc5 calculated in step S17 is within the fifth range R5 (step S18 ). When the abnormality detection unit 16 determines that the difference ΔTc5 is not within the fifth range R5 (step S18 : NO), the abnormality detection unit 16 determines that the pole-opening operation of the opening/closing mechanism unit 20 is abnormal, and outputs from the notification unit 17 indicating that the pole-opening operation of the opening/closing mechanism unit 20 is abnormal. Information about the abnormality of the operation (step S19).

When the process of step S19 ends, the abnormality detection unit 16 determines that the pole-opening command Do is not output (step S10: NO), or determines that the difference ΔTc5 is within the fifth range R5 (step S18: YES) , the process shown in FIG. 11 ends.

FIG. 12 is a flowchart showing an example of processing performed by the abnormality detection unit when the circuit breaker of Embodiment 1 is in the OFF state. In addition, the process shown in FIG. 12 is repeatedly performed by the abnormality detection part 16 when the circuit breaker 1 is in the OFF state.

As shown in FIG. 12 , the abnormality detection unit 16 determines whether or not the closing command Dc is output from the command output unit 40 (step S20 ). The abnormality detection unit 16 determines that the closing command Dc is output (step S20: YES), and calculates the difference ΔTc2 between the timing of outputting the closing command Dc and the timing at which the second switch 32 operates (step S21).

The abnormality detection unit 16 determines whether or not the difference ΔTc2 calculated in step S21 is within the second range R2 (step S22 ). When the abnormality detection unit 16 determines that the difference ΔTc2 is not within the second range R2 (step S22 : NO), the abnormality detection unit 16 determines that the closing operation of the mechanism unit 6 is abnormal, and outputs a message indicating the closing operation of the mechanism unit 6 from the notification unit 17 . Abnormal information (step S23).

When the abnormality detection unit 16 completes the processing of step S23, or when it is determined that the difference ΔTc2 is within the second range R2 (step S22: YES), the timing at which the closing command Dc is output and the timing at which the fourth switch 34 operates are calculated. difference ΔTc4 (step S24). The abnormality detection unit 16 determines whether or not the difference ΔTc4 calculated in step S24 is within the fourth range R4 (step S25 ). When the abnormality detection unit 16 determines that the difference ΔTc4 is not within the fourth range R4 (step S25 : NO), the abnormality detection unit 16 determines that the closing coil unit 22 is abnormal, and outputs information indicating the abnormality of the closing coil unit 22 from the notification unit 17 ( step S26).

When the abnormality detection unit 16 completes the processing of step S26, or when it is determined that the difference ΔTc4 is within the fourth range R4 (step S25: YES), the timing at which the fourth switch 34 operates and the timing at which the second switch 32 operates are calculated. difference ΔTc6 (step S27). The abnormality detection unit 16 determines whether or not the difference ΔTc6 calculated in step S27 is within the sixth range R6 (step S28 ). When the abnormality detection unit 16 determines that the difference ΔTc6 is not within the sixth range R6 (step S28 : NO), the abnormality detection unit 16 determines that the closing operation of the opening/closing mechanism unit 20 is abnormal, and outputs from the notification unit 17 indicating that the closing operation of the opening/closing mechanism unit 20 is abnormal. Information about the abnormality of the operation (step S29).

When the process of step S29 ends, the abnormality detection unit 16 determines that the pole-closing command Dc is not output (step S20 : NO), or that the difference ΔTc6 is within the sixth range R6 (step S28 : YES) , the process shown in Fig. 12 ends.

FIG. 13 is a schematic diagram showing an example of the hardware configuration of the abnormality detection unit according to the first embodiment. As shown in FIG. 13 , the abnormality detection unit 16 includes a computer including a processor 161 , a memory 162 , and an interface circuit 163 .

The processor 161 , the memory 162 and the interface circuit 163 can transmit and receive data with each other through the bus bar 164 . The memory portion 82 can be realized by the memory 162 . The processor 161 executes the functions of the difference calculation unit 81 and the determination unit 83 by reading and executing the programs stored in the memory 162 . The processor 161 is an example of a processing circuit, and includes one or more of a CPU (Central Processing Unit), a DSP (Digital Signal Processor), and a system LSI (Large Scale Integration) .

The memory 162 includes RAM (Random Access Memory, random access memory), ROM (Read Only Memory, read only memory), flash memory, EPROM (Erasable Programmable Read Only Memory, erasable programmable read only memory) one or more of EEPROM (registered trademark) (Electrically Erasable Programmable Read Only Memory, Electrically Erasable Programmable Read Only Memory). In addition, the memory 162 includes a recording medium on which a computer-readable program is recorded. The recording medium includes one or more of non-volatile or volatile semiconductor memory, magnetic disk, flexible memory, optical disk, CD optical disk, and DVD (Digital Versatile Disc). In addition, the abnormality detection unit 16 may also include an integrated circuit such as an ASIC (Application Specific Integrated Circuit) and an FPGA (Field Programmable Gate Array).

Implementation type 2. The circuit breaker of Embodiment 2 differs from the circuit breaker 1 of Embodiment 1 in that it has a fifth switch that operates in conjunction with the start of the pole-opening operation of the mechanism portion, and is operated in conjunction with the start of the mechanism portion’s pole-closing operation. The sixth switch that operates, and the seventh switch that operates in conjunction with the stroke of the mechanism section reaching the intermediate position. Hereinafter, the components having the same functions as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted, and the description will focus on the differences from the circuit breaker 1 of the first embodiment.

Fig. 14 is a schematic diagram showing a configuration example of a circuit breaker according to Embodiment 2 of the present invention. As shown in FIG. 14 , the circuit breaker 1A of the second embodiment is different from the circuit breaker 1 in that it has a switch unit 15A and an abnormality detection unit 16A instead of the switch unit 15 and the abnormality detection unit 16 .

The switch portion 15A includes, in addition to the configuration of the switch portion 15, a fifth switch 35 that operates in conjunction with the start of the pole-opening operation of the opening-closing mechanism portion 20, and a fifth switch 35 that operates in conjunction with the start of the pole-closing operation of the opening-closing mechanism portion 20 The sixth switch 36 ; and the seventh switch 37 that operates in conjunction with the stroke of the opening and closing mechanism portion 20 reaching the intermediate position. The fifth switch 35, the sixth switch 36, and the seventh switch 37 are, for example, micro switches.

The fifth switch 35 is arranged in the circuit breaker 1A so as to operate in conjunction with the start of the pole-opening operation of the opening and closing mechanism unit 20 . For example, the fifth switch 35 is configured such that the contacts are separated from each other in conjunction with the start of the pole-opening operation of the opening-closing mechanism 20 , and the actuator is operated by a member attached to the main shaft 66 . During the pole-opening operation of the opening and closing mechanism portion 20 , the fifth switch 35 operates before the fixed contact 4 and the movable contact 5 are separated. In addition, the fifth switch 35 may be configured so that the contacts are brought into contact with each other in conjunction with the start of the pole-opening operation of the opening and closing mechanism portion 20 .

The sixth switch 36 is arranged in the circuit breaker 1A so as to operate in conjunction with the start of the closing operation of the opening/closing mechanism unit 20 . The sixth switch 36 is, for example, configured to be in contact with the start of the closing operation of the opening and closing mechanism portion 20 , and the actuator is operated by a member attached to the main shaft 66 . During the closing operation of the opening and closing mechanism portion 20 , the sixth switch 36 operates before the fixed contact 4 and the movable contact 5 come into contact with each other. In addition, the sixth switch 36 may be configured such that the contacts are separated from each other in conjunction with the start of the closing operation of the opening and closing mechanism portion 20 .

The seventh switch 37 is arranged in the circuit breaker 1A so as to operate in conjunction with the stroke of the opening and closing mechanism portion 20 reaching the intermediate position. For example, the seventh switch 37 is configured such that the contacts are separated from each other in conjunction with the stroke of the opening/closing mechanism 20 from the first position to the intermediate position, and the actuator is operated by a member attached to the main shaft 66 . During the pole-opening operation of the opening and closing mechanism portion 20 , the seventh switch 37 operates after the fixed contact 4 and the movable contact 5 are separated. In addition, when the closing operation of the opening and closing mechanism portion 20 is performed, the seventh switch 37 operates before the fixed contact 4 and the movable contact 5 come into contact with each other. In addition, the seventh switch 37 may be configured so that the contacts come into contact with each other in conjunction with the stroke of the opening and closing mechanism portion 20 from the first position to the intermediate position.

The abnormality detection unit 16A can determine the abnormality of the opening and closing mechanism unit 20 based on the operation of the fifth switch 35 , the operation of the sixth switch 36 , and the operation of the seventh switch 37 in addition to the function of the abnormality detection unit 16 . FIG. 15 is a schematic diagram showing an example of the configuration of the abnormality detection unit according to the second embodiment.

As shown in FIG. 15 , the abnormality detection unit 16A includes a difference calculation unit 81A, a memory unit 82A, and a determination unit 83A. _{The difference calculation unit 81A includes a seventh calculation unit 84 7} , an eighth calculation unit 84 ₈ , a ninth calculation unit 84 ₉ , and a tenth calculation unit 84 ₁₀ , in addition to the configuration of the difference calculation unit 81 .

A seventh arithmetic unit ₈₄₇ calculates the timing difference ΔTc7 timing of the operation of the first switch 31 of the operation switch 35 is 5. The timing at which the fifth switch 35 operates is the timing at which the signal So5 output from the fifth switch 35 changes from the High level to the Low level.

8 timing calculation unit ₈₄₈ calculates the sixth switch 36 and the operation timing of the operation of the second switch 32 difference ΔTc8. The timing at which the sixth switch 36 operates is the timing at which the signal So6 output from the sixth switch 36 changes from the Low level to the High level.

9 computing unit ₈₄₉ which calculates an opening operation for opening command output unit 40 from the source instruction timing difference ΔTc9 seventh timing switch 37 outputs Do operation. The timing at which the seventh switch 37 operates during the open-pole operation is the timing at which the signal So7 output from the seventh switch 37 changes from the High level to the Low level.

The tenth arithmetic unit 84 to ₁₀ calculates the difference ΔTc10 between the timing at which the closing command Dc from the command output unit 40 is output during the closing operation and the timing at which the seventh switch 37 operates. The timing at which the seventh switch 37 operates during the closing operation is the timing at which the signal So7 output from the seventh switch 37 changes from the Low level to the High level.

The storage unit 82A stores, in addition to the information stored in the storage unit 82, seventh range information representing the seventh range R7, eighth range information representing the eighth range R8, ninth range information representing the ninth range R9, and The 10th range information of the 10th range R10.

The determination unit 83A includes a seventh determination unit 85 ₇ , an eighth determination unit 85 ₈ , a ninth determination unit 85 ₉ , and a tenth determination unit 85 _{10 in addition to the configuration of the} determination unit 83 . A seventh determining section ₈₅₇ in the case where the difference ₈₄₇ is calculated according to the seventh arithmetic unit ΔTc7 is outside the range of 7 R7 is, it is determined that the opening and closing mechanism portion 20 of the actuation is abnormal, the difference ΔTc7 in the range of 7 R7 is In this case, it is determined that the pole-opening operation of the opening and closing mechanism portion 20 is not abnormal. Eighth determination section ₈₅₈ in the case where the difference ₈₄₈ is calculated according to an eighth arithmetic unit ΔTc8 the range of 8 R8 outside, it is determined that the contact closing operation of the opening and closing mechanism portion 20 is abnormal, the difference ΔTc8 the range of 8 R8 is In this case, it is determined that the closing operation of the opening and closing mechanism portion 20 is not abnormal.

9, determination section ₈₅₉ in the case where the difference between the ninth arithmetic unit ₈₄₉ calculates the ΔTc9 is outside the range of 9 R9 is, it is determined that an opening operation mechanism portion 6 is abnormal, is within the range of the difference ΔTc9 of 9 R9 is , it is determined that the pole-opening operation of the mechanism section 6 is not abnormal. The tenth determination unit 85 to ₁₀ determines that the pole-closing operation of the mechanism unit 6 is abnormal when the difference ΔTc10 calculated by the tenth calculation unit 84 to _{10 is outside the tenth range R10, and when the difference ΔTc10 is within the tenth range R10} , it is determined that the closing action of the mechanism portion 6 is not abnormal.

Here, the current flowing into the circuit, and the state changes of the opening and closing mechanism portion 20 , the open-pole coil portion 21 , and the switch portion 15A will be described. First, a state change during the pole-opening operation of the mechanism section 6 will be described. Fig. 16 is a schematic diagram showing the state changes of the current flowing to the circuit, the opening and closing mechanism part, the opening coil part, the first switch, the fifth switch and the seventh switch during the pole opening operation of the circuit breaker according to the second embodiment, and the opening and closing mechanism The state changes of the part 20 and the open-pole coil part 21 are the same as those shown in FIG. 9 .

As shown in FIG. 16, when the circuit breaker 1A is in the closed state, when the pole-opening command Do is output from the command output unit 40 at time t21, the movement position of the plunger of the pole-opening coil unit 21 at time t22 Becomes the action completion position. The trip bar 64 is rotated by the plunger of the pole-opening coil portion 21 , the latch of the opening-closing mechanism portion 20 is released, and at time t22 , the pole-opening operation of the opening-closing mechanism portion 20 is started. When the pole-opening operation of the opening and closing mechanism unit 20 is started, the signal So5 output from the fifth switch 35 changes from the High level to the Low level.

Next, at time t23 when the stroke of the opening and closing mechanism portion 20 reaches the intermediate position, the signal So7 output from the seventh switch 37 changes from the High level to the Low level. Next, at time t25 when the stroke of the opening and closing mechanism portion 20 changes from the first position to the second position, the signal So1 output from the first switch 31 changes from the High level to the Low level.

_{The seventh} calculating unit 847 of the abnormality detecting unit 16A calculates the time t22 when the signal So5 from the fifth switch 35 changes from the High level to the Low level and the time when the signal So1 from the first switch 31 changes from the High level to the Low level The difference period T7 of t25 is the difference ΔTc7. A seventh determining section abnormality detection portion 16A ₈₅₇ during T7 to conditions outside the range of 7 R7, determines that the contact opening operation of the opening and closing mechanism portion 20 is abnormal, in the period T7 is the case within a first range 7 R7, is determined The pole-opening operation of the opening-closing mechanism portion 20 is not abnormal. Thereby, the abnormality detection part 16A of the circuit breaker 1A can individually detect the abnormality of the pole-opening operation of the opening and closing mechanism part 20 among the mechanism parts 6 .

_{Further, the ninth} calculation unit 849 of the abnormality detection unit 16A calculates the difference between the time t21 when the open-pole command Do is output from the command output unit 40 and the time t23 when the signal So7 from the seventh switch 37 changes from the High level to the Low level. The period T9 serves as the difference ΔTc9. 9 determination unit abnormality detection portion 16A ₈₅₉ during T9 of conditions outside the range of 9 R9, determines that the opening operation mechanism portion 6 is abnormal, during T9 is the case within a first range 9 R9, is determined mechanism The pole-opening operation of the section 6 is not abnormal. Thereby, the abnormality detection part 16A of the circuit breaker 1A can detect abnormality in the pole-opening operation of the opening and closing mechanism part 20 until the stroke of the opening and closing mechanism part 20 reaches the intermediate position.

Next, the current flowing to the circuit during the closing operation of the mechanism portion 6 , and the state changes of the opening and closing mechanism portion 20 , the closing coil portion 22 , and the switch portion 15A will be described. 17 is a schematic diagram showing the state changes of the current flowing to the circuit, the opening and closing mechanism, the closing coil, the second switch, the sixth switch and the seventh switch during the closing operation of the circuit breaker according to the second embodiment, and the opening and closing mechanism. The state changes of the part 20 and the closed-pole coil part 22 are the same as those shown in FIG. 10 .

As shown in FIG. 17, when the circuit breaker 1A is in the open state, when the closing command Dc is output from the command output unit 40 at time t31, the movement position of the plunger becomes the operation completion position at time t32. When the movement position of the plunger of the closing coil portion 22 becomes the operation completion position, the closing rod 60 is rotated by the plunger of the closing coil portion 22, the latch of the opening and closing mechanism portion 20 is released, and the closing of the pole of the opening and closing mechanism portion 20 is released. The action begins. When the closing operation of the opening and closing mechanism unit 20 is started, the signal So6 output from the sixth switch 36 changes from the Low level to the High level.

Next, at time t33 when the stroke of the opening and closing mechanism portion 20 reaches the intermediate position, the signal So7 output from the seventh switch 37 changes from the Low level to the High level. Next, at time t35 when the stroke of the opening and closing mechanism portion 20 changes from the second position to the first position, the signal So2 output from the second switch 32 changes from the Low level to the High level.

_{The eighth} calculation unit 848 of the abnormality detection unit 16A calculates the time t32 when the signal So6 from the sixth switch 36 changes from the Low level to the High level and the time when the signal So2 from the second switch 32 changes from the Low level to the High level The difference period T8 of t35 is the difference ΔTc8. Eighth determination section abnormality detection section 16A is ₈₅₈ in the period T8 of conditions outside the range of the 8 R8, it is determined that the contact closing operation of the opening and closing mechanism portion 20 is abnormal, during T8 is the case within a first range 8 R8, it is determined The closing operation of the opening and closing mechanism portion 20 is not abnormal. Thereby, the abnormality detection part 16A of the circuit breaker 1A can individually detect the abnormality of the closing operation of the opening and closing mechanism part 20 among the mechanism parts 6 .

In addition, the tenth calculation unit 84 to _{10 of the} abnormality detection unit 16A calculates the difference between the time t31 when the closing command Dc is output from the command output unit 40 and the time t33 when the signal So7 from the seventh switch 37 changes from the Low level to the High level. The period T10 serves as the difference ΔTc10. 10, determination section abnormality detection section 16A 85 ₁₀ during T10 to conditions outside the range of 10 R10, is determined closing actuation mechanism portion 6 is abnormal, during T10 is the case within a first range 10 R10, it is determined that means The pole-closing action of the part 6 is not abnormal. Thereby, the abnormality detection part 16A of the circuit breaker 1A can detect abnormality of the closing operation of the opening and closing mechanism part 20 until the stroke of the opening and closing mechanism part 20 reaches the intermediate position.

In this way, the circuit breaker 1A can detect the abnormality of the mechanism portion 6 by a different method in addition to the abnormality detection of the mechanism portion 6 performed in the circuit breaker 1, so that the abnormality detection of the mechanism portion 6 can be performed with high accuracy.

Next, processing performed by the abnormality detection unit 16A of the circuit breaker 1A will be described using a flowchart. FIG. 18 is a flowchart showing an example of the processing performed by the abnormality detection unit when the circuit breaker of the second embodiment is in the ON state. Note that the processing performed by the abnormality detection unit 16A when the circuit breaker 1A is in the ON state includes the processing of steps S11 to S19 shown in FIG. 11 , but is omitted in FIG. 18 .

As shown in FIG. 18, the abnormality detection unit 16A determines whether or not an open-pole command Do is output from the command output unit 40 (step S30). The abnormality detection unit 16A determines that the pole-opening command Do is output (step S30: YES), and calculates the difference ΔTc7 between the timing of the operation of the fifth switch 35 and the timing of the operation of the first switch 31 (step S31). The abnormality detection unit 16A determines whether or not the difference ΔTc7 calculated in step S31 is within the seventh range R7 (step S32 ). When the abnormality detection unit 16A determines that the difference ΔTc7 is not within the seventh range R7 (step S32 : NO), the abnormality detection unit 16A determines that the pole-opening operation of the opening/closing mechanism unit 20 is abnormal, and outputs from the notification unit 17 indicating that the pole-opening operation of the opening/closing mechanism unit 20 is abnormal. Information about the abnormality of the operation (step S33).

When the abnormality detection unit 16A finishes the processing of step S33, or when it is determined that the difference ΔTc7 is within the seventh range R7 (step S32: YES), the timing for outputting the pole-opening command Do and the timing for operating the seventh switch 37 are calculated. difference ΔTc9 (step S34). The abnormality detection unit 16A determines whether or not the difference ΔTc9 calculated in step S34 is within the ninth range R9 (step S35 ).

When the abnormality detection unit 16A determines that the difference ΔTc9 is not within the ninth range R9 (step S35 : NO), the abnormality detection unit 16A determines that the pole-opening operation of the mechanism unit 6 is abnormal, and outputs an output from the notification unit 17 indicating the pole-opening operation of the mechanism unit 6 the abnormal information (step S36).

When the process of step S36 ends, the abnormality detection unit 16A determines that the pole-opening command Do is not output (step S30: NO), or determines that the difference ΔTc9 is within the ninth range R9 (step S35: YES) , the process shown in FIG. 18 ends.

FIG. 19 is a flowchart showing an example of processing performed by the abnormality detection unit when the circuit breaker of the second embodiment is in the OFF state. Note that the processing performed by the abnormality detection unit 16A when the circuit breaker 1A is in the OFF state includes the processing of steps S21 to S29 shown in FIG. 12 , but is omitted in FIG. 19 .

As shown in FIG. 19 , the abnormality detection unit 16A determines whether or not the closing command Dc is output from the command output unit 40 (step S40 ). When it is determined that the closing command Dc is output (step S40 : YES), the abnormality detection unit 16A calculates the difference ΔTc8 between the timing of the operation of the sixth switch 36 and the timing of the operation of the second switch 32 (step S41 ). The abnormality detection unit 16A determines whether or not the difference ΔTc8 calculated in step S41 is within the eighth range R8 (step S42 ). When the abnormality detection unit 16A determines that the difference ΔTc8 is not within the eighth range R8 (step S42 : NO), the abnormality detection unit 16A determines that the closing operation of the opening/closing mechanism unit 20 is abnormal, and outputs from the notification unit 17 that the closing operation of the opening/closing mechanism unit 20 is abnormal. Information about the abnormality of the pole motion (step S43).

When the abnormality detection unit 16A finishes the processing of step S43, or when it is determined that the difference ΔTc8 is within the eighth range R8 (step S42: YES), the timing at which the closing command Dc is output and the timing at which the seventh switch 37 operates are calculated. difference ΔTc10 (step S44). The abnormality detection unit 16A determines whether or not the difference ΔTc10 calculated in step S44 is within the tenth range R10 (step S45 ). When the abnormality detection unit 16A determines that the difference ΔTc10 is not within the tenth range R10 (step S45 : NO), the abnormality detection unit 16A determines that the closing operation of the mechanism unit 6 is abnormal, and outputs an output from the notification unit 17 indicating the closing operation of the mechanism unit 6 the abnormal information (step S46).

When the process of step S46 ends, the abnormality detection unit 16A determines that the pole-closing command Dc is not output (step S40: NO), or determines that the difference ΔTc10 is within the tenth range R10 (step S45: YES) , the process shown in Fig. 19 ends.

The hardware configuration of the abnormality detection unit 16A is the same as that of the abnormality detection unit 16 shown in FIG. 13 . The memory unit 82A of the abnormality detection unit 16A is realized by the memory 162 . The processor 161 executes the functions of the difference calculation unit 81A and the determination unit 83A by reading and executing the programs stored in the memory 162 .

In addition, in the above example, the abnormality detection unit 16A calculates the differences ΔTc1 to ΔTc10 and determines whether the differences ΔTc1 to ΔTc10 are within the normal range, but it may be a configuration in which a part of the difference among the differences ΔTc1 to ΔTc10 is not included. In this case, the abnormality detection unit 16A determines whether or not the calculated difference among the differences ΔTc1 to ΔTc10 is within the normal range. The abnormality detection unit 16A does not need to count the number of switches that are not arranged in the switch unit 15A among the first switch 31 , the second switch 32 , the third switch 33 , the fourth switch 34 , the fifth switch 35 , the sixth switch 36 , and the seventh switch. gap. In addition, the abnormality detection unit 16A can calculate only the difference set by the user of the circuit breaker 1A among the differences ΔTc1 to ΔTc10 .

Implementation type 3. The circuit breaker of Embodiment 3 differs from the circuit breakers of Embodiments 1 and 2 in that it has a connection for outputting a contact signal that changes in conjunction with the contact and separation of the fixed contact and the movable contact by the mechanism unit. A dot signal output unit and a voltage detection unit that detects the voltage between the terminals. Hereinafter, components having the same functions as those of the second embodiment will be given the same reference numerals and descriptions thereof will be omitted, and the description will focus on the differences from the circuit breaker 1A of the second embodiment.

Fig. 20 is a schematic diagram of a configuration example of a circuit breaker according to Embodiment 3 of the present invention. As shown in FIG. 20 , the circuit breaker 1B of the third embodiment is different from the circuit breaker A in that it includes a contact signal output unit 18 and a voltage detection unit 19 , and has an abnormality detection unit 16B instead of the abnormality detection unit 16 .

The contact signal output unit 18 outputs a contact signal So8 that changes in conjunction with the contact and separation of the fixed contact 4 and the movable contact 5 by the mechanism unit 6 . The contact signal output unit 18 is, for example, a micro switch. The contact signal output unit 18 is arranged in the circuit breaker 1B so as to be changed in conjunction with the contact and separation of the fixed contact 4 and the movable contact 5 of the mechanism unit 6 . The contact signal output unit 18 operates an actuator, for example, by a member attached to the main shaft 66 . When the contact signal output unit 18 is an auxiliary switch, the contact signal So8 output by the contact signal output unit 18 is sometimes referred to as an auxiliary contact signal.

The voltage detection unit 19 detects an inter-terminal voltage belonging to the voltage between the power-side fixed terminal 2 and the load-side fixed terminal 3 . In addition, the voltage detection unit 19 may be a voltage detection unit that detects the voltage between the contacts, which is the voltage between the fixed contact 4 and the movable contact 5, instead of detecting the voltage between the terminals. In this case, the abnormality detection unit 16B uses the voltage between the contacts instead of the voltage between the terminals. In addition, since the voltage between the terminals due to the arc is larger than the voltage between the contacts due to the arc, it is easy to estimate the arc voltage.

In addition to the function of the abnormality detection unit 16A, the abnormality detection unit 16B can determine the abnormality and connection of the mechanism unit 6 based on the contact signal So8 from the contact signal output unit 18 and the inter-terminal voltage detected by the voltage detection unit 19 . Point consumption exception. The contact consumption is the consumption of at least one of the fixed contact 4 and the movable contact 5 .

FIG. 21 is a schematic diagram showing a configuration example of an abnormality detection unit according to Embodiment 3. FIG. As shown in FIG. 21 , the abnormality detection unit 16B includes a difference calculation unit 81B, a memory unit 82B, and a determination unit 83B. The difference calculation unit 81B includes an eleventh calculation unit 84 ₁₁ , a twelfth calculation unit 84 ₁₂ , and a thirteenth calculation unit 84 _{13 in} addition to the configuration of the difference calculation unit 81A.

The eleventh calculation unit 84 to ₁₁ calculates the difference ΔTc11 between the timing at which the open-pole command Do is output from the command output unit 40 and the timing at which the contact signal So8 from the contact signal output unit 18 changes. The twelfth calculation unit 84 to ₁₂ calculates the difference ΔTc12 between the timing at which the closing command Dc is output from the command output unit 40 and the timing at which the contact signal So8 from the contact signal output unit 18 changes. The thirteenth arithmetic unit 84 to ₁₃ calculates the difference ΔTc13 between the timing of the change of the contact signal So8 from the contact signal output unit 18 and the timing of the fall of the voltage between the terminals detected by the voltage detection unit 19 .

The storage unit 82B stores, in addition to the information stored in the storage unit 82A, 11th range information representing the 11th range R11, 12th range information representing the 12th range R12, and 13th range information representing the 13th range R13. The determination unit 83B includes an eleventh determination unit 85 ₁₁ , a twelfth determination unit 85 _{12 ,} and a thirteenth determination unit 85 _{13 in} addition to the configuration of the determination unit 83A.

The eleventh determination unit 85 ₁₁ determines that the pole-opening operation of the mechanism unit 6 is abnormal when the difference ΔTc11 calculated by the eleventh calculation unit 84 _{11 is outside the eleventh range R11, and when the difference ΔTc11 is within the eleventh range R11} , it is determined that the pole-opening operation of the mechanism section 6 is not abnormal. The twelfth determination unit 85 to ₁₂ determines that the closing operation of the mechanism unit 6 is abnormal when the difference ΔTc12 calculated by the twelfth calculation unit 84 to ₁₂ is outside the twelfth range R12, and when the difference ΔTc12 is within the twelfth range R12 , it is determined that the closing action of the mechanism portion 6 is not abnormal.

The thirteenth determination unit 85 to ₁₃ determines that the contact wear is abnormal when the difference ΔTc13 calculated by the thirteenth calculation unit 84 to ₁₃ is outside the thirteenth range R13, and determines that the contact wear is abnormal when the difference ΔTc13 is within the thirteenth range R13. Point consumption is not unusual. In addition, the term that the contact wear is abnormal means, for example, that at least one of the fixed contact 4 and the movable contact 5 is at the time of replacement due to wear.

Here, the state change of the current flowing to the circuit, the switching mechanism unit 20 , the open-pole coil unit 21 , the contact signal output unit 18 , and the voltage between the terminals will be described. First, a state change during the pole-opening operation of the mechanism section 6 will be described. Fig. 22 is a schematic diagram showing the state changes of the current flowing to the circuit, the opening and closing mechanism part, the opening coil part, the contact signal and the voltage between the terminals during the pole opening operation of the circuit breaker according to the third embodiment. The state change of the pole coil part 21 is the same as that shown in FIG. 9 .

As shown in FIG. 22, when the circuit breaker 1B is in the closed state, when the pole-opening command Do is output from the command output unit 40 at time t51, at time t52, the movement position of the plunger of the pole-opening coil unit 21 becomes At the operation completion position, the pole-opening operation of the opening and closing mechanism portion 20 starts. Next, at time t53, the fixed contact 4 and the movable contact 5 are separated by the pole-opening operation of the opening and closing mechanism portion 20, and the contact signal So8 from the contact signal output portion 18 changes from the High level to the Low level. In addition, the contact signal output unit 18 may be configured to change the contact signal So8 from the Low level to the High level at the timing when the fixed contact 4 and the movable contact 5 are separated.

After the fixed contact 4 and the movable contact 5 are separated for a certain period of time, the current will continue to flow between the fixed contact 4 and the movable contact 5 due to the arc. At time t54, the fixed contact 4 and the movable contact 5 The arc between them disappears. Next, the stroke of the opening and closing mechanism portion 20 becomes the second position, and the pole-opening operation of the opening and closing mechanism portion 20 is completed. The inter-terminal voltage detected by the voltage detection unit 19 rises at time t53 and falls at time t54.

The eleventh calculation unit 84 to _{11 of the} abnormality detection unit 16B calculates the difference between the time t51 when the open pole command Do is output from the command output unit 40 and the time t53 when the contact signal So8 from the contact signal output unit 18 changes from the High level to the Low level. The difference period T11 is the difference ΔTc11. Abnormality detection unit 11, determination unit 16B 85 ₁₁ period T11 of conditions outside the range of 11 R11, determines that the opening operation mechanism portion 6 is abnormal, in the period T11 is the case in the first range 11 R11, it is determined that means The pole-opening operation of the section 6 is not abnormal. A general circuit breaker can be equipped with an auxiliary switch as an additional accessory, so by using the auxiliary switch as the contact signal output part 18, the circuit breaker 1B can be easily constructed.

The thirteenth calculation unit 84 to _{13 of the} abnormality detection unit 16B calculates the time t53 at which the contact signal So8 from the contact signal output unit 18 changes from the high level to the low level and the time t54 at which the voltage between the terminals detected by the voltage detection unit 19 drops The period T13 of the difference is taken as the difference ΔTc13. Abnormality detection unit 13, determination unit 16B 85 ₁₃ T13 during the first range outside of the case 13 R13, it is determined that the contact is abnormal consumption, in the case where the period T13 is 13 within the scope of R13, it is determined that the contact is not unusual for consumption .

In the example shown in FIG. 22 , the timing at which the contact signal So8 from the contact signal output unit 18 changes from the High level to the Low level is the same as the timing at which the voltage between the terminals rises detected by the voltage detection unit 19 . Therefore, the abnormality detection unit 16B does not need to detect the rise of the voltage between the terminals detected by the voltage detection unit 19, but can determine the abnormality of the contact consumption, and does not need to temporarily memorize the timing of the rise of the voltage between the terminals. Therefore, the abnormality detection unit 16B can achieve high-speed calculation and low-capacity memory.

Next, the current flowing to the circuit during the closing operation of the mechanism portion 6 , and the state changes of the opening and closing mechanism portion 20 , the closing coil portion 22 , and the contact signal output portion 18 will be described. Fig. 23 is a schematic diagram showing the state changes of the current flowing to the circuit, the opening and closing mechanism part, the closing coil part and the contact signal during the closing operation of the circuit breaker according to the third embodiment, the opening and closing mechanism part 20 and the closing coil part 22 The state change is the same as in Figure 10.

As shown in FIG. 23, when the circuit breaker 1B is in the open state, when the closing command Dc is output from the command output unit 40 at time t61, at time t62, the movement position of the plunger becomes the operation completion position, and the opening and closing mechanism The latch of the part 20 is released, and the closing operation of the opening and closing mechanism part 20 is started. At time t63, the fixed contact 4 and the movable contact 5 are in contact with each other by the closing operation of the opening and closing mechanism 20, and the contact signal So8 from the contact signal output unit 18 changes from the Low level to the High level. Next, at time t64, the closing operation of the opening and closing mechanism portion 20 is completed.

The twelfth calculation unit 84 to _{12 of the} abnormality detection unit 16B calculates the difference between the time t61 when the closing command Dc is output from the command output unit 40 and the time t63 when the contact signal So8 from the contact signal output unit 18 changes from the Low level to the High level. The difference period T12 is the difference ΔTc12. Abnormality detection unit 12, determination unit 16B 85 ₁₂ period T12 of conditions outside the range of 12 R12, is determined mechanism closing actuation 6 abnormality, the period T12 is the case within a first range 12 R12, is determined mechanism section There is no abnormality in the closing action of 6. As described above, a general circuit breaker can be equipped with an auxiliary switch as an additional component, so that the circuit breaker 1B can be easily configured by using the auxiliary switch as the contact signal output unit 18 .

In this way, the circuit breaker 1B can detect the abnormality of the mechanism part 6 by a different method in addition to the abnormality detection of the mechanism part 6 performed in the circuit breaker 1A, and thus can accurately detect the abnormality of the mechanism part 6 .

Next, the process performed by the abnormality detection part 16B of the circuit breaker 1B is demonstrated using a flowchart. FIG. 24 is a flowchart showing an example of processing performed by the abnormality detection unit when the circuit breaker of Embodiment 3 is in the ON state. In addition, the processing performed by the abnormality detection unit 16B when the circuit breaker 1B is in the ON state includes the processing of steps S11 to S19 shown in FIG. 11 and the processing of steps S31 to S36 shown in FIG. omitted.

As shown in FIG. 24 , the abnormality detection unit 16B determines whether or not an open-pole command Do is output from the command output unit 40 (step S50 ). The abnormality detection unit 16B determines that the pole-opening command Do is output (step S50: YES), and calculates the difference ΔTc11 between the timing at which the pole-opening command Do is output and the timing at which the contact signal So8 from the contact signal output unit 18 changes (step S50: YES). S51). The abnormality detection unit 16B determines whether or not the difference ΔTc11 calculated in step S51 is within the eleventh range R11 (step S52 ). When the abnormality detection unit 16B determines that the difference ΔT11 is not within the eleventh range R11 (step S52 : NO), the abnormality detection unit 16B determines that the pole-opening operation of the mechanism unit 6 is abnormal, and outputs an output from the notification unit 17 indicating the pole-opening operation of the mechanism unit 6 the abnormal information (step S53).

When the abnormality detection unit 16B completes the process of step S53, or when it is determined that the difference ΔTc11 is within the eleventh range R11 (step S52: YES), it calculates the difference between the timing of the output of the open-pole command Do and the timing of falling of the voltage between the terminals. difference ΔTc13 (step S54). The abnormality detection unit 16B determines whether or not the difference ΔTc13 calculated in step S54 is within the thirteenth range R13 (step S55 ).

When it is determined that the difference ΔTc13 is not within the thirteenth range R13 (step S55 : NO), the abnormality detection unit 16B determines that the contact consumption is abnormal, and outputs information indicating the abnormality of the contact consumption from the notification unit 17 (step S56 ). .

When the process of step S56 ends, the abnormality detection unit 16B determines that the pole-opening command Do is not output (step S50: NO), or determines that the difference ΔTc13 is within the thirteenth range R13 (step S55: YES) , the process shown in Fig. 24 ends.

FIG. 25 is a flowchart of an example of processing performed by the abnormality detection unit when the circuit breaker of the third embodiment is in the OFF state. In addition, the processing performed by the abnormality detection unit 16B when the circuit breaker 1B is in the OFF state includes the processing of steps S21 to S29 shown in FIG. 12 and the processing of steps S41 to S46 shown in FIG. 19 . omitted from the figure.

As shown in FIG. 25 , the abnormality detection unit 16B determines whether or not the closing command Dc is output from the command output unit 40 (step S60 ). The abnormality detection unit 16B determines that the closing command Dc is output (step S60: YES), and calculates the difference ΔTc12 between the timing at which the closing command Dc is output and the timing at which the contact signal So8 from the contact signal output unit 18 changes (step S60: YES). S61). The abnormality detection unit 16B determines whether or not the difference ΔTc12 calculated in step S61 is within the twelfth range R12 (step S62 ). When the abnormality detection unit 16B determines that the difference ΔTc12 is not within the twelfth range R12 (step S62 : NO), the abnormality detection unit 16B determines that the closing operation of the mechanism unit 6 is abnormal, and outputs an output from the notification unit 17 indicating the closing operation of the mechanism unit 6 the abnormal information (step S63).

When the process of step S63 ends, the abnormality detection unit 16B determines that the closing command Dc is not output (step S60: NO), or determines that the difference ΔT12 is within the twelfth range R12 (step S62: YES) , the process shown in Fig. 25 ends.

The hardware configuration of the abnormality detection unit 16B is the same as that of the abnormality detection unit 16 shown in FIG. 13 . The memory unit 82B of the abnormality detection unit 16B is realized by the memory 162 . The processor 161 executes the functions of the difference calculation unit 81B and the determination unit 83B by reading and executing the programs stored in the memory 162 .

In addition, in the above example, the abnormality detection unit 16B calculates the differences ΔTc1 to ΔTc13 and determines whether the differences ΔTc1 to ΔTc13 are within the normal range, but it may be a configuration in which a part of the differences among the differences ΔTc1 to ΔTc13 is not included. In this case, the abnormality detection unit 16B determines whether or not the calculated difference among the differences ΔTc1 to ΔTc13 is within the normal range. The abnormality detection unit 16B does not need to calculate the difference related to the switches not arranged in the circuit breaker 1B. In addition, the abnormality detection unit 16B can calculate only the difference set by the user of the circuit breaker 1B among the differences ΔTc1 to ΔTc13.

In addition, the opening-closing mechanism part 20 of the circuit breakers 1, 1A, and 1B is not limited to the structure shown in FIGS. 3-6. For example, the circuit breakers 1, 1A, and 1B may be configured to have the mechanism portion 6 other than the operation by the spring. In addition, when the time of the pole-opening operation of the pole-opening coil part 21 is much smaller than the time of the pole-opening operation of the opening and closing mechanism part 20, the pole-opening time of the pole-opening coil part 21 can be ignored. Similarly, when the time for the closing operation of the closing coil portion 22 is much smaller than the time for closing the opening and closing mechanism portion 20 , the closing operation time for the closing coil portion 22 can be ignored.

The configuration shown in the above embodiment is an example showing the content of the present invention, and may be combined with other well-known techniques, or a part of the configuration may be omitted or modified without departing from the gist of the present invention.

1, 1A, 1B: Circuit breaker 2: Power supply side fixed terminal 3: Load side fixed terminal 4: Fixed contact 5: Movable contact 6: Mechanism 7: Housing 8: AC power supply 11: Inverter 12: Off OFF button 13: ON button 14: drive unit 15, 15A: switch unit 16, 16A, 16B: abnormality detection unit 17: notification unit 18: contact signal output unit 19: voltage detection unit 20: switching mechanism unit 21: open pole Coil part 22: Closed pole coil part 31: 1st switch 32: 2nd switch 33: 3rd switch 34: 4th switch 35: 5th switch 36: 6th switch 37: 7th switch 40: Command output part 41: Rectifier circuits 42, 43: switching element 44: open-pole command output part 45: closed-pole command output part 47: snap pin 50: movable contact 51: flexible conductor 52: crimping spring 53: frame 54: cam 54a: Cam side roller 55: Guide plate 56: Closing spring 57: Energy storage arm 57a: Arm side roller 58: First closing latch 58a: Latch side roller 59: Second closing latch 60: Closing rod 61: Link Mechanism 62: Link rod 62a: Rod side roller 63: Trip latch 64: Trip rod 65: Arm for second link 66: Spindle 67: Bolt 68: First link 69: Second link 70 : Arm portion for insulating link 71 : Pin 72 : Insulating link 81 , 81A, 81B : Difference calculation portion 82 , 82A, 82B : Memory portion 83 , 83A, 83B : Determining portion 84 ₁ : First computing portion 84 ₂ : 2nd arithmetic unit 84 ₃ : 3rd arithmetic unit 84 ₄ : 4th arithmetic unit 84 ₅ : 5th arithmetic unit 84 ₆ : 6th arithmetic unit 84 ₇ : 7th arithmetic unit 84 ₈ : 8th arithmetic unit 84 ₉ : 1st arithmetic unit 9 Computation unit 84 ₁₀ : Tenth computation unit 84 ₁₁ : Eleventh computation unit 84 ₁₂ : Twelfth computation unit 84 ₁₃ : Thirteenth computation unit 85 ₁ : First determination unit 85 ₂ : Second determination unit 85 ₃ : Third Judgment part 85 ₄ : Fourth judgment part 85 ₅ : Fifth judgment part 85 ₆ : Sixth judgment part 85 ₇ : Seventh judgment part 85 ₈ : Eighth judgment part 85 ₉ : Ninth judgment part 85 ₁₀ : Tenth judgment part Section 85 ₁₁ : Eleventh decision Section 85 ₁₂ : Twelfth decision Section 85 ₁₃ : Thirteenth decision Section 161: Processor 162: Memory 163: Interface circuit 164: Bus Dc: Close command Do: Open command

FIG. 1 is a schematic diagram of a configuration example of a circuit breaker according to Embodiment 1 of the present invention. FIG. 2 is a schematic diagram of an example of the configuration of the drive unit according to the first embodiment. FIG. 3 is a cross-sectional view of the circuit breaker when the circuit breaker according to Embodiment 1 is in an open state in which charging is completed. FIG. 4 is a cross-sectional view of the circuit breaker when the circuit breaker according to Embodiment 1 is in a closed state in which discharge is completed. FIG. 5 is a cross-sectional view of the circuit breaker when the circuit breaker according to Embodiment 1 is in a closed state in which charging is completed. FIG. 6 is a cross-sectional view of the circuit breaker when the circuit breaker according to Embodiment 1 is changed from a closed state in which charging is completed to an open state in which charging is completed. FIG. 7 is a schematic diagram of the relationship among the main shaft, the insulating link arm, and the insulating link according to Embodiment 1. FIG. FIG. 8 is a schematic diagram of a configuration example of an abnormality detection unit according to Embodiment 1. FIG. FIG. 9 is a schematic diagram showing the state changes of the current flowing to the circuit, the switching mechanism part, the pole opening coil part, the first switch and the third switch during the pole opening operation of the circuit breaker according to the first embodiment. Fig. 10 is a schematic diagram showing the state changes of the current flowing to the circuit, the opening and closing mechanism part, the closing coil part, the second switch and the fourth switch during the closing operation of the circuit breaker according to the first embodiment. FIG. 11 is a flowchart of an example of processing performed by the abnormality detection unit when the circuit breaker of Embodiment 1 is in the ON state. FIG. 12 is a flowchart of an example of processing performed by the abnormality detection unit when the circuit breaker of Embodiment 1 is in the OFF state. FIG. 13 is a schematic diagram showing an example of the hardware configuration of the abnormality detection unit according to the first embodiment. Fig. 14 is a schematic diagram showing a configuration example of a circuit breaker according to Embodiment 2 of the present invention. FIG. 15 is a schematic diagram showing an example of the configuration of the abnormality detection unit according to the second embodiment. 16 is a schematic diagram showing the state changes of the current flowing to the circuit, the opening and closing mechanism, the opening coil, the first switch, the fifth switch, and the seventh switch during the pole opening operation of the circuit breaker according to the second embodiment. 17 is a schematic diagram showing the state changes of the current flowing to the circuit, the opening and closing mechanism, the closing coil, the second switch, the sixth switch, and the seventh switch during the closing operation of the circuit breaker according to the second embodiment. FIG. 18 is a flowchart showing an example of processing performed by the abnormality detection unit when the circuit breaker of the second embodiment is in the ON state. FIG. 19 is a flowchart of an example of processing performed by the abnormality detection unit when the circuit breaker of Embodiment 2 is in the OFF state. Fig. 20 is a schematic diagram showing a configuration example of a circuit breaker according to Embodiment 3 of the present invention. FIG. 21 is a schematic diagram showing a configuration example of an abnormality detection unit according to Embodiment 3. FIG. 22 is a schematic diagram showing the state changes of the current flowing to the circuit, the opening and closing mechanism part, the pole opening coil part, the contact signal and the voltage between the terminals during the pole opening operation of the circuit breaker according to the third embodiment. FIG. 23 is a schematic diagram showing the state changes of the current flowing to the circuit, the opening/closing mechanism part, the closing coil part, and the contact signal during the closing operation of the circuit breaker according to the third embodiment. Fig. 24 is a flowchart showing an example of processing performed by the abnormality detection unit when the circuit breaker of the third embodiment is in the ON state. FIG. 25 is a flowchart of an example of processing performed by the abnormality detection unit when the circuit breaker of Embodiment 3 is in the OFF state.

1: circuit breaker

4: Fixed contacts

5: Movable contact

6: Institutional Department

11: Converter

12: Shutdown button

13: On button

14: Drive Department

15: Switch part

16: Anomaly Detection Section

17: Notification Department

20: Opening and closing mechanism department

21: Open-pole coil part

22: Closed pole coil part

31: 1st switch

32: 2nd switch

33: 3rd switch

34: 4th switch

40: Command output section

Dc: closing command

Do: open pole command

Claims (11)

A circuit breaker comprising: a mechanism part for opening and closing a circuit; a command output part for outputting an operation command for operating the mechanism part; an operation; and an abnormality detection unit for detecting an abnormality of the mechanism unit based on the difference between the timing of outputting the operation command from the command output unit and the timing of the operation of the switch unit; A pole opening command, the switch part includes a first switch, the first switch is operated in conjunction with the completion of the operation of the mechanism part according to the pole opening command, and the abnormality detecting part is based on the output of the pole opening command from the command output part. The difference between the timing and the timing of the first switch operation is used to detect the abnormality of the mechanism. The circuit breaker according to claim 1, wherein the operation command includes a closing command for causing the mechanism part to perform a closing operation, the switch part includes a second switch, and the second switch is in a relationship with the closing according to the closing operation. The commanded mechanism operates in conjunction with the completion of the operation, and the abnormality detection unit detects the abnormality of the mechanism based on the difference between the timing of outputting the closing command from the command output unit and the timing of the second switch operation. The circuit breaker according to claim 2, wherein the mechanism portion includes: an opening and closing mechanism portion for contacting and separating the fixed contact and the movable contact; and The open-pole coil part acts on the open-close mechanism part, so that the open-close mechanism part performs separation of the fixed contact and the movable contact, and includes a third switch, and is connected to the open-close mechanism by the open-pole coil part The abnormality detection part detects the abnormality of the open-pole coil part based on the difference between the timing of outputting the open-pole command from the command output part and the timing of the third switching operation. The circuit breaker according to claim 3, wherein the mechanism portion includes a pole-closing coil portion that acts on the opening-closing mechanism portion to cause the opening-closing mechanism portion to perform contact between the fixed contact and the movable contact , and includes a fourth switch, the fourth switch is operated in conjunction with the completion of the action of the closing coil part on the opening and closing mechanism part, and the abnormality detecting part is based on the timing of outputting the closing command from the command output part. The abnormality of the closing coil portion is detected by the difference with the timing of the fourth switching operation. The circuit breaker according to claim 1 or 2, wherein the mechanism portion includes an opening/closing mechanism portion for contacting and separating the fixed contact and the movable contact, the switch portion includes a fifth switch, and the switch portion includes a fifth switch. The 5-switching relationship operates in conjunction with the start of the operation of the opening and closing mechanism portion based on the opening command, and the abnormality detection portion detects the operation of the mechanism portion based on the difference between the timing of the fifth switching operation and the timing of the first switching operation. abnormal. The circuit breaker as described in item 2 of the scope of the application, wherein, The mechanism portion includes an opening and closing mechanism portion that performs contact and separation between a fixed contact and a movable contact, the switch portion includes a sixth switch, and the sixth switch is in a relationship with the operation of the opening and closing mechanism portion based on the closing command. The abnormality detection unit detects the abnormality of the mechanism unit based on the difference between the timing of the operation of the sixth switch unit and the timing of the operation of the second switch unit. The circuit breaker according to claim 1 or 2, wherein the mechanism section includes an opening/closing mechanism section for contacting and separating a fixed contact and a movable contact, the switch section includes a seventh switch, and the switch section includes a seventh switch. The seven-switching relationship operates in conjunction with the stroke of the opening and closing mechanism portion reaching the intermediate position, and the abnormality detecting portion detects the operation of the mechanism portion based on the difference between the timing of outputting the opening command from the command output portion and the timing of the seventh switching operation. abnormal. The circuit breaker according to claim 2, wherein the mechanism portion includes an opening/closing mechanism portion for contacting and separating a fixed contact and a movable contact, the switch portion includes a seventh switch, and the seventh open The relationship operates in conjunction with the stroke of the opening/closing mechanism section reaching the intermediate position, and the abnormality detection section detects the abnormality of the mechanism section based on the difference between the timing of outputting the closing command from the command output section and the timing of the seventh switch operation. A circuit breaker as described in Item 1 or 2 of the scope of the application, and further comprising: a contact signal output unit that outputs a contact signal that changes in conjunction with the separation of the fixed contact and the movable contact by the mechanism unit, and the abnormality detection unit outputs the open pole based on the output from the command output unit The difference between the timing of the command and the timing of the change of the contact signal from the contact signal output unit is used to detect the abnormality of the mechanism. The circuit breaker as described in claim 1 or 2, further comprising: a contact signal output unit for outputting a contact signal that changes in conjunction with the separation of the fixed contact and the movable contact of the mechanism unit; and a voltage detection unit for detecting the voltage between the terminal to which the fixed contact is electrically connected and the terminal to which the movable contact is electrically connected, and the abnormality detection unit is based on the contact signal from the contact signal output unit Abnormal consumption of at least one of the fixed contact and the movable contact is detected by the difference between the timing of the change and the timing of the voltage drop detected by the voltage detection unit. The circuit breaker according to claim 2, further comprising: a contact signal output unit for outputting a contact signal that changes in conjunction with the contact between the fixed contact and the movable contact by the mechanism unit, The abnormality detection unit detects the abnormality of the mechanism unit based on the difference between the timing at which the closing command is output from the command output unit and the timing at which the contact signal from the contact signal output unit changes.

Images