KR20170000049A - Driving mechanism of vaccum circuit breaker - Google Patents
Driving mechanism of vaccum circuit breaker Download PDFInfo
- Publication number
- KR20170000049A KR20170000049A KR1020150088620A KR20150088620A KR20170000049A KR 20170000049 A KR20170000049 A KR 20170000049A KR 1020150088620 A KR1020150088620 A KR 1020150088620A KR 20150088620 A KR20150088620 A KR 20150088620A KR 20170000049 A KR20170000049 A KR 20170000049A
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- KR
- South Korea
- Prior art keywords
- contact
- driving
- piston
- lever
- driving cylinder
- Prior art date
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Classifications
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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
-
- 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
- H01H33/02—Details
- H01H33/42—Driving mechanisms
-
- 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
- H01H33/662—Housings or protective screens
- H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
Abstract
Description
The present invention relates to a driving part of a vacuum circuit breaker, and more particularly, to a driving part of a vacuum circuit breaker capable of moving a movable contact provided in a vacuum circuit breaker to realize a closing operation and an opening operation of the vacuum circuit breaker.
When a fault occurs in the power system, a high fault current corresponding to several tens of times the rated current can flow due to a sudden drop in the load impedance. In order to prevent spreading of fault area and damage to other equipment in the event of a power system accident, the fault current must be cut off promptly, and the reliability of the circuit breaker with such a function has a key influence on the reliability of the whole system. Circuit breakers used in power distribution systems consist of Vacuum Circuit Breaker (VCB), which is excellent in breaking performance, safety and reliability. As the load increases, the use of vacuum breaker of power transmission class gradually increases.
Generally, a vacuum interrupter is provided with a fixed contact and a movable contact in a vacuum interrupter (insulating container), and the movable contact receives power from the driving part and is electrically connected to and separated from the fixed contact.
On the other hand, between the movable contact and the fixed contact of the vacuum circuit breaker, an electromagnetic repulsive force is generated by the electric current, so that a force pushing each other acts between the contacts.
A contact spring is provided to prevent the contact due to the electromagnetic repulsive force and to apply a contact pressure load to the contact in order to ensure stable energizing performance.
Such a contact spring is generally provided on an insulating rod connecting the driving part and the movable contact.
However, in the vacuum breaker according to the related art, when the contact spring contacts the contact spring when the contact spring is closed, vibration occurs due to the impact force between the contact points, so that the contact break occurs several times in a short time, Thereby causing problems such as contact damage, performance degradation, and shortened life span.
The vacuum circuit breaker according to the related art is rapidly decelerated by the actuator operation at the end of the opening operation, but the movable contact connected to the contact spring is over-run while the contact spring is compressed by the inertial force, Exercise affects the life of the bellows by increasing the degree of deformation of the bellows connected to the movable contact.
In addition, such excessive motion phenomenon causes vibrations in the movable contact during opening operation, so that the moment when the distance between the contacts approaches again may occur, which may adversely affect the breaking performance of the circuit breaker.
The vacuum circuit breaker according to the prior art as described above is disclosed in Korean Patent Laid-Open No. 10-2013-0050538.
SUMMARY OF THE INVENTION The present invention has been made to solve at least some of the problems of the prior art as described above, and it is an object of the present invention to provide a driving part of a vacuum circuit breaker in which a phenomenon of over- .
According to one aspect of the present invention for achieving at least part of the above objects, there is provided a driving part of a vacuum circuit breaker configured to reciprocate a movable contact to electrically connect and disconnect a movable contact to a fixed contact, road; A driving cylinder disposed at the other end of the insulating rod and reciprocating in the axial direction of the insulating rod; A piston which is provided at the other end of the insulating rod so as to be in conformity with the insulating rod and which is accommodated in the driving cylinder so as to be slidable in the axial direction of the insulating rod and transmits the moving force of the driving cylinder to the insulating rod; ; A contact spring whose one end is supported by the insulating rod and the other end is supported by the drive cylinder; And an attenuator provided inside the driving cylinder and applying a damping force to the piston to attenuate the vibration of the contact pressure spring.
In one embodiment, the attenuator may include a force transmission rod configured to be pressed by an external force and applying a restoring force to push the piston toward the stationary contact.
According to an embodiment of the present invention, the piston is provided with an elongated groove extending in the longitudinal direction of the driving cylinder, and the driving cylinder is slidably engaged with the groove to transmit a driving force of the driving cylinder to the piston, .
Further, in one embodiment, a fixing unit facing the driving cylinder and provided on the axis of the insulating rod; A first contact lever having one end rotatably coupled to the fixed member; A second contact lever having one end rotatably coupled to the drive cylinder and the other end rotatably coupled to the other end of the first contact lever; A rotation lever rotatable by a manipulator in a direction of a connection portion between the first contact lever and the second contact lever; And one end connected to the end of the rotation lever and the other end connected to a connection portion between the first contact lever and the second contact lever so that the rotational force of the rotation lever is connected to the connection between the first contact lever and the second contact lever And a connecting rod for transmitting the signal to the site.
According to an embodiment of the present invention, the piston is provided with an elongated groove extending in the longitudinal direction of the driving cylinder, and the driving cylinder is slidably engaged with the groove to transmit a driving force of the driving cylinder to the piston, And one end of the second contact lever may be coupled to the drive pin.
For example, when the movable contact is electrically connected to the fixed contact, the first contact lever and the second contact lever may be arranged to form an angle between 175 degrees and 185 degrees with respect to each other.
According to an embodiment of the present invention having such a configuration, an effect of reducing chattering phenomenon between contacts can be obtained.
Further, according to the embodiment of the present invention, it is possible to obtain an effect that the excessive motion of the movable contact is reduced, the life of the component is extended, and the blocking reliability and the blocking performance are improved.
Brief Description of the Drawings Fig. 1 is an operational state view showing an open state of a vacuum circuit breaker to which a driving unit according to an embodiment of the present invention is applied.
FIG. 2 is an operational state view showing a closed state of a vacuum circuit breaker to which the driving unit shown in FIG. 1 is applied.
FIG. 3 is an operational state view showing the inside of a driving cylinder included in a driving unit according to an embodiment of the present invention in an open state of a breaker. FIG.
Fig. 4 is an operational state view showing the interior of the driving cylinder in the closed state of the breaker included in the driving unit shown in Fig. 3; Fig.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Furthermore, the singular forms "a", "an," and "the" include plural referents unless the context clearly dictates otherwise.
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
1 to 4, a driving unit of a vacuum circuit breaker according to an embodiment of the present invention will be described.
1 and 2, a
Here, the
The fixed
The
The
1 to 4, a driving
The
The insulating
The driving
In one embodiment, the
The
The
The
In one embodiment, the
In addition, in one embodiment, the
A
The driving
That is, the driving
The
For example, the
The
The
In one embodiment, the
The
In one example, the
The
The
One end of the
In one embodiment, the
Here, the
The
In one embodiment, the
The
In one embodiment, the
The
One end of the connecting
Hereinafter, the operation of the
1, when the
Accordingly, the first and second contact levers 171 and 172 are rotated in such a manner that the connecting
At this time, since one end of the
At this time, as the driving
3, the
2, when the
Thus, the first and second contact levers 171 and 172 are rotated in a state in which the connecting
At this time, the driving
The
The first and second contact levers 171 and 172 rotate downward and upward with respect to the connecting
Accordingly, when the
In addition, the driving
To this end, for example, when the
When the
In the meantime, the driving
In addition, the driving
While the present invention has been particularly shown and described with reference to particular embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention as defined by the following claims I would like to make it clear.
10: Enclosure 20: Vacuum interrupter
30: fixed contact point 40: movable contact point
50: Bellows
100: driving part 110: insulating rod
120: drive cylinder 130: piston
132: groove 140: drive pin
150: contact spring 152: spring-loaded region
160: Attenuator 162: Force transmission rod
171: first contact lever 172: second contact lever
173: Fixing portion 175: Connection portion
180: Rotary lever 185: Actuator
190: connecting rod
Claims (6)
An insulating rod whose one end is coupled to the movable contact;
A driving cylinder disposed at the other end of the insulating rod and reciprocating in the axial direction of the insulating rod;
A piston which is provided at the other end of the insulating rod so as to be in conformity with the insulating rod and which is accommodated in the driving cylinder so as to be slidable in the axial direction of the insulating rod and transmits the moving force of the driving cylinder to the insulating rod; ;
A contact spring whose one end is supported by the insulating rod and the other end is supported by the drive cylinder; And
An attenuator provided inside the driving cylinder and applying a damping force to the piston to attenuate vibration of the contact pressure spring;
And a driving circuit for driving the vacuum circuit breaker.
Wherein the damper comprises a force transmission rod configured to be pressed by an external force and applying a restoring force to push the piston in the direction of the fixed contact.
Wherein the piston has an elongated groove extending in the longitudinal direction of the driving cylinder,
And the drive cylinder is provided with a drive pin slidably coupled to the groove to transmit the movement force of the drive cylinder to the piston.
A fixing part facing the driving cylinder and provided on the axis of the insulating rod;
A first contact lever having one end rotatably coupled to the fixed member;
A second contact lever having one end rotatably coupled to the drive cylinder and the other end rotatably coupled to the other end of the first contact lever;
A rotation lever rotatable by a manipulator in a direction of a connection portion between the first contact lever and the second contact lever; And
One end of which is connected to the end of the rotation lever and the other end of which is connected to the connection portion between the first contact lever and the second contact lever so that the rotational force of the rotation lever is transmitted to the connection portion between the first contact lever and the second contact lever To a connecting rod;
And a driving circuit for driving the vacuum circuit breaker.
Wherein the piston has an elongated groove extending in the longitudinal direction of the driving cylinder,
Wherein the driving cylinder is provided with a driving pin that is slidably coupled to the groove and transmits the moving force of the driving cylinder to the piston,
And the second contact lever is coupled to the drive pin at one end thereof.
And the first contact lever and the second contact lever are arranged to form an angle between 175 degrees and 185 degrees when the movable contact is electrically connected to the fixed contact.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020150088620A KR101702539B1 (en) | 2015-06-22 | 2015-06-22 | Driving mechanism of vaccum circuit breaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020150088620A KR101702539B1 (en) | 2015-06-22 | 2015-06-22 | Driving mechanism of vaccum circuit breaker |
Publications (2)
Publication Number | Publication Date |
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KR20170000049A true KR20170000049A (en) | 2017-01-02 |
KR101702539B1 KR101702539B1 (en) | 2017-02-06 |
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KR1020150088620A KR101702539B1 (en) | 2015-06-22 | 2015-06-22 | Driving mechanism of vaccum circuit breaker |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108320954A (en) * | 2018-03-27 | 2018-07-24 | 浙江华仪电器科技有限公司 | A kind of excess of stroke spring mounting structure for insulated tension pole |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109200608B (en) * | 2018-11-16 | 2020-11-06 | 蓝旺节能科技(浙江)有限公司 | Anti-blocking and anti-pollution circulating evaporation system for traditional Chinese medicine |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20060095701A (en) * | 2005-02-28 | 2006-09-01 | 진광 이 앤 씨 주식회사 | Contact pressing type vaccum circuit breaker using cam disk |
KR20120061969A (en) * | 2009-10-09 | 2012-06-13 | 가부시끼가이샤 도시바 | Shock absorber of operation mechanism for opening and closing device and method for lubricating same |
KR101448136B1 (en) * | 2013-04-04 | 2014-10-07 | 이엔테크놀로지 주식회사 | Devise operating for vacuum circuitbreaker |
-
2015
- 2015-06-22 KR KR1020150088620A patent/KR101702539B1/en active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20060095701A (en) * | 2005-02-28 | 2006-09-01 | 진광 이 앤 씨 주식회사 | Contact pressing type vaccum circuit breaker using cam disk |
KR20120061969A (en) * | 2009-10-09 | 2012-06-13 | 가부시끼가이샤 도시바 | Shock absorber of operation mechanism for opening and closing device and method for lubricating same |
KR101448136B1 (en) * | 2013-04-04 | 2014-10-07 | 이엔테크놀로지 주식회사 | Devise operating for vacuum circuitbreaker |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108320954A (en) * | 2018-03-27 | 2018-07-24 | 浙江华仪电器科技有限公司 | A kind of excess of stroke spring mounting structure for insulated tension pole |
CN108320954B (en) * | 2018-03-27 | 2023-11-24 | 浙江华仪电器科技有限公司 | Over-travel spring mounting structure for insulating pull rod |
Also Published As
Publication number | Publication date |
---|---|
KR101702539B1 (en) | 2017-02-06 |
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