CN110192260B - Vacuum switch device and its abnormality monitoring method - Google Patents
Vacuum switch device and its abnormality monitoring method Download PDFInfo
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- CN110192260B CN110192260B CN201880006562.3A CN201880006562A CN110192260B CN 110192260 B CN110192260 B CN 110192260B CN 201880006562 A CN201880006562 A CN 201880006562A CN 110192260 B CN110192260 B CN 110192260B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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- Arc-Extinguishing Devices That Are Switches (AREA)
- Gas-Insulated Switchgears (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The invention provides a vacuum switch device, which can grasp contact consumption and contact load in operation except detailed inspection, and can improve the operation and the reliability of power supply of the device. In a vacuum switchgear of the present invention, a main circuit switch unit and an operating mechanism unit for operating the main circuit switch unit are connected via a link mechanism unit, the main circuit switch unit is covered with an insulating frame, the operating mechanism unit and the link mechanism unit are covered with a box frame of a ground potential, a 1 st position detector is provided between an end surface of an insulating rod of the main circuit switch unit opposite to a vacuum switch and the insulating frame or the box frame, a stroke characteristic of the insulating rod is detected by the 1 st position detector, and the continuously detected stroke characteristic of the insulating rod is compared with a previously acquired normal stroke characteristic of the insulating rod by a comparing device to determine the presence or absence of an abnormality.
Description
Technical Field
The present invention relates to a vacuum switchgear and an abnormality monitoring method thereof, and for example, to a vacuum switchgear and an abnormality monitoring method thereof suitable for monitoring an abnormality based on stroke characteristics of a vacuum switch of a vacuum circuit breaker and an electromagnetic operator for operating the vacuum switch.
Background
As a conventional technique for monitoring an abnormality based on a stroke characteristic of a vacuum switchgear, for example, patent document 1 can be cited.
Documents of the prior art
Patent document
Disclosure of Invention
Technical problem to be solved by the invention
The abnormality monitoring method for monitoring abnormality based on stroke characteristics of the vacuum circuit breaker described in patent document 1 irradiates a spot signal from the upper portion of the case of the electromagnetic actuator to the upper surface of the drive lever, detects a stroke based on the angle or position of the reflected signal, measures the stroke characteristics of the electromagnetic actuator, and monitors the abnormality.
However, although the structure described in patent document 1 can grasp an operation abnormality of the electromagnetic operator and an airtight abnormality of the vacuum switch, it cannot grasp consumption of the contact point of the vacuum switch and a contact load.
In general, since heat generation during normal operation (energization) is affected by consumption of contacts and contact load of a vacuum switch and the performance of current interruption is degraded by the heat generation, when detailed inspection is performed in a period of 1 year or 3 years, measurement is performed in a state where a vacuum circuit breaker is disconnected from a system, and it is necessary to interrupt power to a system (factory, building, general home, etc.) lower than the vacuum circuit breaker in order to perform the measurement, or the switching operation of the vacuum switch is a high-frequency vacuum circuit breaker, and before the detailed inspection, the consumption amount of the contacts and the contact load value exceed judgment values, so that the energization performance is deteriorated and an abnormal state where current interruption is impossible may occur, which has been a problem in the related art.
The present invention has been made in view of the above problems, and an object thereof is to provide a vacuum switchgear and an abnormality monitoring method thereof, which can grasp contact consumption and contact load even in operations other than detailed inspection, and can improve the reliability of the operation and the energization of the vacuum switchgear.
Means for solving the problems
In order to achieve the above object, a vacuum switchgear according to the present invention is configured such that a main circuit switch unit and an operation mechanism unit for operating the main circuit switch unit are connected to each other via a link mechanism unit, the main circuit switch unit including: fixing the side conductor; a vacuum switch having a pair of contacts that can be contacted/separated; a movable side conductor; a flexible conductor electrically connecting the vacuum switch and the movable side conductor; an insulating rod for moving the movable side of the vacuum switch in the vertical direction; a contact pressure spring for applying a contact load to a contact point in the vacuum switch; and a lever connecting member that pushes up the contact spring, the operating mechanism portion including: a permanent magnet and a coil, or a switch-on spring; an operator case that houses the permanent magnet and the coil or the contact spring; a breaking spring separating contacts of the vacuum switch; and a drive rod disposed on the shafts of these members, the link mechanism portion including: a shaft provided in the link mechanism portion housing; a 1 st lever having one end fixed to the shaft and the other end connected to the lever connection member of the main circuit switch unit by a 1 st pin; and a 2 nd rod having one end fixed to the shaft and the other end connected to the driving rod of the operating mechanism unit by a 2 nd pin, wherein the main circuit switch unit is covered with an insulating frame, and the operating mechanism unit and the link mechanism unit are covered with a box frame having a ground potential, the vacuum switchgear is characterized in that: a 1 st position detector is provided between an end surface of the insulating rod opposite to the vacuum switch and the insulating frame or the case frame, a stroke characteristic of the insulating rod is detected by the 1 st position detector, and the continuously detected stroke characteristic of the insulating rod is compared with a previously acquired normal stroke characteristic of the insulating rod by a comparing device to determine whether or not there is an abnormality.
In order to achieve the above object, a method for monitoring an abnormality of a vacuum switchgear according to the present invention includes: in the vacuum switchgear, a main circuit switch unit and an operation mechanism unit for operating the main circuit switch unit are connected via a link mechanism unit, and the main circuit switch unit includes: fixing the side conductor; a vacuum switch having a pair of contacts that can be contacted/separated; a movable side conductor; a flexible conductor electrically connecting the vacuum switch and the movable side conductor; an insulating rod for moving the movable side of the vacuum switch in the vertical direction; a contact pressure spring for applying a contact load to a contact point in the vacuum switch; and a lever connecting member that pushes up the contact spring, the operating mechanism portion including: a permanent magnet and a coil, or a switch-on spring; an operator case that houses the permanent magnet and the coil or the contact spring; a breaking spring for breaking the contact of the vacuum switch; and a drive rod disposed on the shafts of these members, the link mechanism portion including: a shaft provided in the link mechanism portion housing; a 1 st lever having one end fixed to the shaft and the other end connected to the lever connection member of the main circuit switch unit by a 1 st pin; and a 2 nd rod having one end fixed to the shaft and the other end connected to the driving rod of the operating mechanism unit by a 2 nd pin, wherein the main circuit switch unit is covered with an insulating frame, and the operating mechanism unit and the link mechanism unit are covered with a casing frame having a ground potential, and wherein when monitoring an abnormality of the vacuum switchgear, a 1 st position detector provided between an end surface of the insulating rod opposite to the vacuum switch and the insulating frame or the casing frame detects a stroke characteristic of the insulating rod, and a comparator compares the continuously detected stroke characteristic of the insulating rod with a previously acquired normal stroke characteristic of the insulating rod to determine the presence or absence of the abnormality.
Effects of the invention
According to the present invention, such effects can be obtained: contact consumption and contact load can be grasped even during operation other than detailed inspection, and the reliability of the operation and the energization of the device can be improved.
Drawings
Fig. 1 is a side view of a vacuum circuit breaker according to embodiment 1 of a vacuum switchgear of the present invention in a breaking state.
Fig. 2 is a side view of a vacuum circuit breaker according to embodiment 1 of the vacuum switchgear of the present invention in an on state.
Fig. 3 is a side view of a vacuum circuit breaker according to embodiment 2 of the vacuum switchgear of the present invention in a breaking state.
Fig. 4 is a side view of a vacuum circuit breaker according to embodiment 2 of the vacuum switchgear of the present invention in an on state.
Fig. 5 is a side view of a vacuum circuit breaker according to embodiment 3 of the vacuum switchgear of the present invention in a breaking state.
Fig. 6 is a side view of a vacuum circuit breaker according to embodiment 3 of the vacuum switchgear of the present invention in an on state.
Fig. 7 shows an example of measuring the stroke characteristics of the vacuum circuit breaker according to embodiment 1 of the vacuum switchgear of the present invention, and is a diagram showing a closing operation.
Fig. 8 shows an example of measuring the stroke characteristics of the vacuum circuit breaker according to embodiment 1 of the vacuum switchgear of the present invention, and is a diagram showing the case of an open operation.
Detailed Description
The vacuum switchgear and the abnormality monitoring method according to the present invention will be described below based on the illustrated embodiments. In each embodiment, the same reference numerals are used for the same structural members.
Example 1
Fig. 1 and 2 show a vacuum circuit breaker according to embodiment 1 of the vacuum switchgear of the present invention, fig. 1 shows a shut-off state of the vacuum circuit breaker, and fig. 2 shows an on state of the vacuum circuit breaker.
The vacuum circuit breaker shown in fig. 1 and 2 roughly includes a main circuit switch portion 1 shown on the left side in the drawing, an operating mechanism portion 2 shown on the right side in the drawing, and a link mechanism portion 3 shown on the lower side in the drawing.
The main circuit switch unit 1 is covered with an insulating frame 4, and the operating mechanism unit 2 and the link mechanism unit 3 are covered with a casing frame 5 having a ground potential. The insulating frame 4 of the main circuit switching unit 1 is fixed to either or both of the link mechanism unit case 6 and the operation mechanism unit case 7. In fig. 1 and 2, the main circuit switch unit 1 is fixed to the link mechanism unit case 6 as an example.
In fig. 1 and 2, a one-phase circuit breaker is illustrated as a vacuum circuit breaker, but a three-phase circuit breaker may be used, and in this case, main circuit switch units 1 corresponding to three phases are arranged side by side in the depth direction of fig. 1 and 2. The operation mechanism 2 is exemplified by an electromagnetic operation type operator, but may be a spring operation type operator in which an on spring is used instead of the permanent magnet 15 and the coil 16, which will be described later, and the on spring and the off spring are held by latch mechanisms, respectively.
The main circuit switching unit 1 includes: a fixed side conductor 8; a vacuum switch 9 having a pair of contacts contactable and separable; a movable side conductor 10; a flexible conductor 11 electrically connecting the vacuum switch 9 and the movable side conductor 10; an insulating frame 4 that electrically insulates these components from the operation mechanism section 2 and the link mechanism section 3; an insulating rod 12 for moving the movable side of the vacuum switch 9 in the vertical direction; a contact pressure spring 13 for applying a contact load to a contact point in the vacuum switch 9; and a lever connection member 14 that pushes up the touch spring 13.
Further, the operation mechanism section 2 includes: a permanent magnet 15, a coil 16, an operator case 17 housing the permanent magnet 15 and the coil 16, a breaking spring 18 separating contacts of the vacuum switch 9, and a driving rod 19 disposed on the shafts of these components.
Further, the link mechanism portion 3 includes: a shaft 20 pivotally supported by the link mechanism section case 6; a 1 st lever 22 fixed to the shaft 20 and coupled to the lever connection member 14 of the main circuit switch unit 1 by a 1 st pin 21; and a 2 nd rod 24 similarly fixed to the shaft 20 and coupled to the driving rod 19 of the operation mechanism portion 2 by a 2 nd pin 23.
With the above configuration, the linear motion in the vertical direction of the driving rod 19 of the operating mechanism section 2 is transmitted to the movable side of the vacuum switch 9 via the 1 st lever 22 and the 2 nd lever 24, and the contact of the vacuum switch 9 is opened and closed.
In the present embodiment, the 1 st position detector 25 is disposed between the insulating rod 12 on the movable side of the vacuum switch 9 and the insulating frame 4.
Specifically, the 1 st position detector 25 is disposed so as to bridge between the end surface 12a of the insulating rod 12 opposite to the vacuum switch 9 and the insulating frame 4, and the insulator 31 is provided between the end surface 12a of the insulating rod 12 opposite to the vacuum switch 9 and the portion of the 1 st position detector 25 on the vacuum switch 9 side. Further, a rolling body 32 is provided between an end surface 12a of the insulating rod 12 opposite to the vacuum switch 9 and the insulator 31.
The 1 st position detector 25 may be disposed so as to bridge between the end surface 12a of the insulating rod 12 opposite to the vacuum switch 9 and the housing frame 5.
The 1 st position detector 25 detects the operating state of the insulating rod 12, that is, the stroke characteristic of the insulating rod 12, and can acquire the continuously detected stroke characteristic of the insulating rod 12.
Since the insulating rod 12 is directly connected to the movable side of the vacuum switch 9, the stroke of the insulating rod 12 is the stroke of the movable side of the vacuum switch 9. Further, by connecting the 1 st position detector 25 to the end surface 12a on the opposite side of the vacuum switch 9 connected to the insulating rod 12, the insulation distance can be made longer than in the case of connecting to the side surface of the insulating rod 12, and therefore, the stroke characteristic of the insulating rod 12 can be detected without affecting the insulation of the vacuum circuit breaker.
When the switching operation of the vacuum circuit breaker is performed in this way, the stroke characteristic of the insulating rod 12 obtained by continuously detecting the stroke characteristic of the insulating rod 12 is compared with the stroke characteristic of the normal insulating rod 12 obtained in advance by the comparison device 30 a. As a result of the comparison by the comparison device 30a, when the speed is slower than the normal value during the closing operation of the vacuum circuit breaker, it is determined that the operation mechanism unit 2 is abnormal, the link mechanism unit 3 is abnormal, and the pressure of the vacuum switch 9 is abnormal.
Fig. 7 and 8 show examples of measuring the stroke characteristics in the present embodiment, in which the vertical axis shows the stroke and the horizontal axis shows time. Fig. 7 shows a case of the closed circuit operation, and fig. 8 shows a case of the open circuit operation.
As shown in this figure, the stroke characteristic in a normal state (solid line) changes substantially linearly, that is, at a constant speed. On the other hand, when there is an abnormality in the operation of the vacuum circuit breaker, as indicated by the broken line, the change in the stroke characteristic is delayed or stagnated, and the speed of the part is slower than that in the normal state, and it is empirically possible to determine that the life of the vacuum circuit breaker has been reached or there is an abnormality when the speed change exceeds 20 to 40% of that in the normal state.
Further, the stroke value of the insulating rod 12 in the on state of the vacuum circuit breaker immediately after the manufacture, which is acquired in advance, is compared with the stroke value of the insulating rod 12 in the on state of the vacuum circuit breaker for each switching operation, which is detected by the 1 st position detector 25, by the comparison device 30a, and the consumption amount of the contact of the vacuum switch 9 can be calculated from the magnitude of the stroke value of the comparison result by the comparison device 30a, and the life of the vacuum switch 9 can be determined from the consumption amount of the contact of the vacuum switch 9.
According to the present embodiment, contact consumption and contact load of the vacuum switch 9 can be grasped even during operation other than detailed inspection, and the reliability of the operation and energization of the vacuum circuit breaker can be improved.
Example 2
Fig. 3 and 4 show a vacuum circuit breaker according to embodiment 2 of the vacuum switchgear of the present invention, fig. 3 shows a shut-off state of the vacuum circuit breaker, and fig. 4 shows an on state of the vacuum circuit breaker. The same portions as those in embodiment 1 will not be described.
In this embodiment, in addition to the 1 st position detector 25 described in embodiment 1, a 2 nd position detector 26 is disposed so as to bridge between the movable-side lever connection member 14 of the vacuum switch 9 and the insulating frame 4.
Specifically, the 2 nd position detector 26 is disposed so as to bridge between the insulating frame 4 and a projection 14a that projects outward (left side in fig. 3 and 4) on the opposite side of the lever connection member 14 that is connected to the 1 st lever 22 by the 1 st pin 21. The other structure is the same as embodiment 1.
The 2 nd position detector 26 may be disposed so as to bridge between the case frame 5 and a projection 14a that is located on the opposite side of the lever connection member 14 to which the 1 st pin 21 is connected and that projects outward (left side in fig. 3 and 4).
The 2 nd position detector 26 detects the stroke characteristic of the rod link 14, the continuously detected stroke characteristic of the rod link 14 is compared with the stroke characteristic of the normal rod link 14 acquired in advance by the comparator 30b, and the presence or absence of an abnormality in the vacuum circuit breaker is determined based on the magnitude of the stroke value compared by the comparator 30 b.
In addition, in the on state of the vacuum circuit breaker, by comparing the difference between the stroke value of the insulating rod 12 detected by the 1 st position detector 25 and the stroke value of the rod connecting member 14 detected by the 2 nd position detector 26 with the previously obtained normal difference by the comparison device 30b, in addition to the effect of the configuration according to the above-described embodiment 1, since the compression amount of the touch spring 13, that is, the contact load of the contact of the vacuum switch 9 can be grasped, heat generation can be estimated from the relationship between the contact load and the contact resistance obtained in advance, the 1 st position detector 25 is disposed so as to bridge between the end surface of the insulating rod 12 opposite to the vacuum switch 9 and the insulating frame 4, and the 2 nd position detector 26 is disposed so as to bridge between the protruding portion 14a protruding outward (left side in fig. 3 and 4) on the opposite side to the side where the 1 st pin 21 and the 1 st rod 22 of the rod connecting member 14 are connected and the insulating frame 4, heat generation can be estimated by the comparison device 30b Is configured in the same manner as (1).
Example 3
Fig. 5 and 6 show a vacuum circuit breaker according to embodiment 3 of the vacuum switchgear of the present invention, fig. 5 shows a shut-off state of the vacuum circuit breaker, and fig. 6 shows an on state of the vacuum circuit breaker. The same portions as those in embodiment 2 will not be described.
In this embodiment, in addition to the 1 st position detector 25 and the 2 nd position detector 26 described in embodiment 2, a 3 rd position detector 27 is disposed so as to bridge between the drive rod 19 of the operating mechanism portion 2 and the operator housing 17.
Specifically, the 3 rd position detector 27 is disposed so as to bridge between the upper surface 17a of the operator housing 17 and a projection 19a of the drive rod 19, which is provided at the tip of the drive rod 19 on the opposite side of the side connected to the 2 nd lever 24 by the 2 nd pin 23 and projects outward (rightward in fig. 5 and 6). The other structure is the same as embodiment 2.
The stroke characteristic of the drive rod 19 of the operating mechanism section 2 is detected by the 3 rd position detector 27, and the continuously detected stroke characteristic of the drive rod 19 is compared with the stroke characteristic of the normal drive rod 19 acquired in advance by the comparator 30c, and it is determined whether or not there is an abnormality.
That is, in the present embodiment, the 1 st position detector 25 is disposed so as to bridge between the end surface 12a of the insulating rod 12 opposite to the vacuum switch 9 and the insulating frame 4, the 2 nd position detector 26 is disposed so as to bridge between the protruding portion 14a which is opposite to the side of the rod connecting member 14 connected to the 1 st pin 21 and protrudes outward (left side in fig. 3 and 4) and the insulating frame 4, the 1 st position detector 25, the 2 nd position detector 26, and the 3 rd position detector 27 are used to detect the stroke characteristics of the insulating rod 12, the rod connecting member 14, and the driving rod 19, and the stroke characteristics of the insulating rod 12, the rod connecting member 14, and the driving rod 19 which are continuously detected are compared with the stroke characteristics of the normal insulating rod 12, the rod connecting member 14, and the driving rod 19 which are obtained in advance by the comparison device 30c, whereby the abnormal portion can be specified, the 3 rd position detector 27 is disposed so as to bridge between the upper surface 17a of the operator housing 17 and a protrusion 19a provided at the tip of the drive rod 19 opposite to the side connected to the 2 nd lever 24 by the 2 nd pin 23 and protruding outward (rightward in fig. 5 and 6).
According to the present embodiment, it is possible to grasp the contact consumption and the contact load of the vacuum switch 9 even in the operation other than the detailed inspection, and to further improve the reliability of the operation and the energization of the vacuum circuit breaker.
The 1 st position detector 25, the 2 nd position detector 26, and the 3 rd position detector 27 in the above embodiments are supplied with power from the power source for operating the vacuum circuit breaker.
In addition, the 1 st position detector 25, the 2 nd position detector 26, and the 3 rd position detector 27 in the above embodiments use variable resistors that interlock with changes in the respective strokes of the insulating rod 12, the rod connecting member 14, and the driving rod 19.
The above-described embodiments have been described in detail to facilitate understanding of the present invention, and are not limited to the embodiments including all of the structures described. Further, a part of the structure of one embodiment can be replaced with the structure of another embodiment, and the structure of another embodiment can be added to the structure of one embodiment. In addition, some of the structures of the embodiments may be added, omitted, or replaced with other structures.
Description of reference numerals
1 … … main circuit switch part, 2 … … operating mechanism part, 3 … … link mechanism part, 4 … … insulating frame, 5 … … box frame, 6 … … link mechanism part housing, 7 … … operating mechanism part housing, 8 … … fixed side conductor, 9 … … vacuum switch, 10 … … movable side conductor, 11 … … flexible conductor, 12 … … insulating rod, end face of 12a … … insulating rod on the opposite side of vacuum switch, 13 … … touch spring, 14 … … rod connecting member, projection of 14a … … rod connecting member, 15 … … permanent magnet, 16 … … coil, 17 … … operator housing, 17a … … upper part of operator housing, 18 … … breaking spring, 19 … … driving rod, 19a … … driving rod projection, 20 … … shaft, 21 … … first pin, 22 … … first rod, 23 … … second pin, 24 … … second rod, 25 … … first position detector, 26 … … 2 nd position detector, 27 … … 3 rd position detector, 30a, 30b, 30c … … comparator, 31 … … insulator, 32 … … rotor.
Claims (17)
1. A vacuum switching apparatus, characterized in that:
the main circuit switch part and the operation mechanism part for operating the main circuit switch part are connected through the link mechanism part,
the main circuit switching section includes: fixing the side conductor; a vacuum switch having a pair of contacts that can be contacted/separated; a movable side conductor; a flexible conductor electrically connecting the vacuum switch and the movable side conductor; an insulating rod for moving the movable side of the vacuum switch in the vertical direction; a contact pressure spring for applying a contact load to a contact point in the vacuum switch; and a lever connecting member that pushes up the contact spring, the operating mechanism portion including: a permanent magnet and a coil, or a switch-on spring; an operator case that houses the permanent magnet and the coil or the contact spring; a breaking spring separating contacts of the vacuum switch; and a driving rod disposed on the permanent magnet and the shaft of the breaking spring,
the link mechanism portion includes: a shaft provided in the link mechanism portion housing; a 1 st lever having one end fixed to the shaft provided in the link mechanism section housing and the other end connected to the lever connection member of the main circuit switch section by a 1 st pin; and a 2 nd lever having one end fixed to the shaft provided in the link mechanism section housing and the other end connected to the driving rod of the operation mechanism section by a 2 nd pin,
the main circuit switch unit is covered with an insulating frame, the operating mechanism unit and the link mechanism unit are covered with a case frame having a ground potential,
a 1 st position detector is provided between an end surface of the insulating rod opposite to the vacuum switch and the insulating frame or the box frame, a stroke characteristic of the insulating rod is detected by the 1 st position detector, the continuously detected stroke characteristic of the insulating rod is compared with a previously acquired normal stroke characteristic of the insulating rod by a comparing device to determine whether there is an abnormality,
a 2 nd position detector is provided between the rod link member on the movable side of the vacuum switch and the insulating frame or the housing frame, a stroke characteristic of the rod link member is detected by the 2 nd position detector, the continuously detected stroke characteristic of the rod link member is compared by the comparing means with a previously acquired normal stroke characteristic of the rod link member, and the presence or absence of an abnormality is determined based on the magnitude of a stroke value compared by the comparing means,
the comparison means compares the difference between the stroke value of the insulating rod detected by the 1 st position detector and the stroke value of the rod connecting member detected by the 2 nd position detector with a previously obtained normal difference, and thereby grasps the contact load of the contact of the vacuum switch.
2. The vacuum switching apparatus according to claim 1, wherein:
the 1 st position detector is disposed so as to bridge between an end surface of the insulating rod on the side opposite to the vacuum switch and the insulating frame or the case frame.
3. The vacuum switching apparatus according to claim 1, wherein:
when the speed is slower than a normal value during the on operation of the vacuum switchgear as a result of comparing the stroke characteristic of the insulating rod continuously detected by the 1 st position detector with the normal stroke characteristic of the insulating rod acquired in advance by the comparison device, it is determined that the operation mechanism portion is abnormal, the link mechanism portion is abnormal, or the pressure of the vacuum switchgear is abnormal.
4. The vacuum switching apparatus according to claim 1, wherein:
the comparison means compares a stroke value of the insulating rod in an on state of the vacuum switchgear for each switching operation detected by the 1 st position detector with a stroke value of the insulating rod in an on state of the vacuum switchgear acquired in advance, and calculates a consumption amount of the contact of the vacuum switchgear based on a magnitude of a stroke value obtained by the comparison means, thereby determining the life of the vacuum switchgear.
5. The vacuum switching apparatus according to claim 1, wherein:
the 2 nd position detector is disposed so as to bridge between a protruding portion that protrudes outward and is located on the opposite side of the lever connection member that is connected to the 1 st lever by the 1 st pin, and the insulating frame or the case frame.
6. The vacuum switching apparatus according to claim 1, wherein:
a 3 rd position detector is provided between the drive rod of the operation mechanism portion and the operator housing, a stroke characteristic of the drive rod of the operation mechanism portion is detected by the 3 rd position detector, and the continuously detected stroke characteristic of the drive rod is compared with a previously acquired stroke characteristic of a normal drive rod by a comparison device to determine whether or not there is an abnormality.
7. The vacuum switching apparatus according to claim 6, wherein:
the 3 rd position detector is disposed so as to bridge between an upper surface of the operator case and a projecting portion which is provided at a distal end of the drive rod on a side opposite to a side where the 2 nd pin is connected to the 2 nd rod and projects outward.
8. The vacuum switching apparatus according to claim 6, wherein:
the 1 st position detector, the 2 nd position detector and the 3 rd position detector detect respective stroke characteristics of the insulating rod, the rod connecting member and the driving rod, and the comparing device compares the respective stroke characteristics of the insulating rod, the rod connecting member and the driving rod, which are continuously detected, with the respective stroke characteristics of the insulating rod, the rod connecting member and the driving rod, which are obtained in advance and are normal, to specify an abnormal portion.
9. The vacuum switching apparatus according to claim 1, wherein:
the 1 st position detector is provided on an end surface of the insulating rod on a side opposite to the vacuum switch with an insulator interposed therebetween.
10. The vacuum switching apparatus according to claim 9, wherein:
and a rotating body is arranged between the end surface of the insulating rod on the side opposite to the vacuum switch and the insulator.
11. The vacuum switching apparatus according to claim 8, wherein:
the 1 st position detector, the 2 nd position detector, and the 3 rd position detector are supplied with power from the power supply for operating the vacuum switch device.
12. The vacuum switching apparatus according to claim 11, wherein:
the 1 st position detector, the 2 nd position detector, and the 3 rd position detector are variable resistors that are interlocked with changes in respective strokes of the insulating rod, the rod connecting member, and the driving rod.
13. An abnormality monitoring method for a vacuum switchgear, characterized in that:
in the vacuum switch device, a main circuit switch part and an operation mechanism part for operating the main circuit switch part are connected through a link mechanism part,
the main circuit switching section includes: fixing the side conductor; a vacuum switch having a pair of contacts that can be contacted/separated; a movable side conductor; a flexible conductor electrically connecting the vacuum switch and the movable side conductor; an insulating rod for moving the movable side of the vacuum switch in the vertical direction; a contact pressure spring for applying a contact load to a contact point in the vacuum switch; and a lever connecting member that pushes up the contact spring, the operating mechanism portion including: a permanent magnet and a coil, or a switch-on spring; an operator case that houses the permanent magnet and the coil or the contact spring; a breaking spring separating contacts of the vacuum switch; and a driving rod disposed on the permanent magnet and the shaft of the breaking spring,
the link mechanism portion includes: a shaft provided in the link mechanism portion housing; a 1 st lever having one end fixed to the shaft provided in the link mechanism section housing and the other end connected to the lever connection member of the main circuit switch section by a 1 st pin; and a 2 nd lever having one end fixed to the shaft provided in the link mechanism section housing and the other end connected to the driving rod of the operation mechanism section by a 2 nd pin,
the main circuit switch unit is covered with an insulating frame, the operating mechanism unit and the link mechanism unit are covered with a case frame having a ground potential,
when monitoring the abnormality of the vacuum switchgear, a 1 st position detector disposed between an end surface of the insulating rod opposite to the vacuum switch and the insulating frame or the box frame detects a stroke characteristic of the insulating rod, a comparator compares the continuously detected stroke characteristic of the insulating rod with a previously acquired normal stroke characteristic of the insulating rod to determine whether there is an abnormality,
a 2 nd position detector is provided between the rod link member on the movable side of the vacuum switch and the insulating frame or the housing frame, a stroke characteristic of the rod link member is detected by the 2 nd position detector, the continuously detected stroke characteristic of the rod link member is compared by the comparing means with a previously acquired normal stroke characteristic of the rod link member, and the presence or absence of an abnormality is determined based on the magnitude of a stroke value compared by the comparing means,
the comparison means compares the difference between the stroke value of the insulating rod detected by the 1 st position detector and the stroke value of the rod connecting member detected by the 2 nd position detector with a previously obtained normal difference, and thereby grasps the contact load of the contact of the vacuum switch.
14. The abnormality monitoring method for a vacuum switching apparatus according to claim 13, characterized in that:
when the speed is slower than a normal value during the on operation of the vacuum switchgear as a result of comparing the stroke characteristic of the insulating rod continuously detected by the 1 st position detector with the normal stroke characteristic of the insulating rod acquired in advance by the comparison device, it is determined that the operation mechanism portion is abnormal, the link mechanism portion is abnormal, or the pressure of the vacuum switchgear is abnormal.
15. The abnormality monitoring method for a vacuum switching apparatus according to claim 13, characterized in that:
the stroke value of the insulating rod in the on state of the vacuum switchgear for each switching operation detected by the 1 st position detector is compared with a stroke value of the insulating rod in the on state of the vacuum switchgear acquired in advance by the comparison device, and the consumption amount of the contact of the vacuum switchgear is calculated based on the magnitude of the stroke value obtained by the comparison device, thereby determining the life of the vacuum switchgear.
16. The abnormality monitoring method for a vacuum switching apparatus according to claim 13, characterized in that:
a 3 rd position detector is provided between the drive rod of the operation mechanism portion and the operator housing, a stroke characteristic of the drive rod of the operation mechanism portion is detected by the 3 rd position detector, and the continuously detected stroke characteristic of the drive rod is compared with a previously acquired stroke characteristic of a normal drive rod by a comparison device to determine whether or not there is an abnormality.
17. The abnormality monitoring method for a vacuum switching apparatus according to claim 16, characterized in that:
the 1 st position detector, the 2 nd position detector and the 3 rd position detector detect respective stroke characteristics of the insulating rod, the rod connecting member and the driving rod, and the comparing device compares the respective stroke characteristics of the insulating rod, the rod connecting member and the driving rod, which are continuously detected, with the respective stroke characteristics of the insulating rod, the rod connecting member and the driving rod, which are obtained in advance and are normal, to specify an abnormal portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017164078A JP6766019B2 (en) | 2017-08-29 | 2017-08-29 | Vacuum switchgear and its abnormality monitoring method |
| JP2017-164078 | 2017-08-29 | ||
| PCT/JP2018/020008 WO2019044071A1 (en) | 2017-08-29 | 2018-05-24 | Vacuum switch device and anomaly monitoring method therefor |
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| Publication Number | Publication Date |
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| CN110192260A CN110192260A (en) | 2019-08-30 |
| CN110192260B true CN110192260B (en) | 2020-12-11 |
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| CN201880006562.3A Active CN110192260B (en) | 2017-08-29 | 2018-05-24 | Vacuum switch device and its abnormality monitoring method |
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| Country | Link |
|---|---|
| JP (1) | JP6766019B2 (en) |
| CN (1) | CN110192260B (en) |
| SG (1) | SG11201905688RA (en) |
| WO (1) | WO2019044071A1 (en) |
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| CN110600321B (en) * | 2019-08-29 | 2021-05-07 | 常德威迪电气有限责任公司 | Strut type circuit breaker with insulation pull rod |
| FR3124306A1 (en) | 2021-06-16 | 2022-12-23 | Schneider Electric Industries Sas | Device for breaking a medium voltage electrical circuit |
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- 2017-08-29 JP JP2017164078A patent/JP6766019B2/en active Active
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- 2018-05-24 WO PCT/JP2018/020008 patent/WO2019044071A1/en active Application Filing
- 2018-05-24 SG SG11201905688RA patent/SG11201905688RA/en unknown
- 2018-05-24 CN CN201880006562.3A patent/CN110192260B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6766019B2 (en) | 2020-10-07 |
| WO2019044071A1 (en) | 2019-03-07 |
| SG11201905688RA (en) | 2020-03-30 |
| JP2019040832A (en) | 2019-03-14 |
| CN110192260A (en) | 2019-08-30 |
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