CN106783285B - A kind of isolation circuit breakers steerable system - Google Patents
A kind of isolation circuit breakers steerable system Download PDFInfo
- Publication number
- CN106783285B CN106783285B CN201611050133.5A CN201611050133A CN106783285B CN 106783285 B CN106783285 B CN 106783285B CN 201611050133 A CN201611050133 A CN 201611050133A CN 106783285 B CN106783285 B CN 106783285B
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- rod
- switch
- substrate
- control
- motor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/40—Driving mechanisms, i.e. for transmitting driving force to the contacts using friction, toothed, or screw-and-nut gearing
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The present invention relates to a kind of isolation circuit breakers steerable system, which is installed in control cabinet；It is characterized by: the isolation circuit breakers steerable system includes mutual lock operation apparatus, closes locking device and transmission mechanism；It mutual lock operation apparatus and closes between locking device through transmission mechanism connection；The operating condition that breaker and earthing knife-switch cannot close a floodgate simultaneously is realized by mutual lock operation apparatus, by closing the case where locking device realization prevents breaker closing when earthing knife-switch is closed a floodgate, protects the safety of circuit.
Description
Technical field
The present invention relates to circuit engineering field more particularly to a kind of isolation circuit breakers steerable systems.
Background technique
Breaker is the electric current referred to close, carry and cut-off under normal loop condition and can close, when defined
Interior carrying and the switching device for cut-offfing the electric current under abnormal loop condition.
Breaker can be used to distribute electric energy, infrequently start asynchronous motor, carry out power circuit and motor etc.
Protection, when serious overload or short circuit and the failures such as under-voltage occurs in they can automatic shutdown circuit, function is equivalent to molten
Disconnected combination device formula switch and cross underheat relay etc..And change components are not needed generally after disjunction fault current.Mesh
Before, it has had been widely used.
A kind of circuit breaker operating mechanism as shown in Chinese patent 201110296602.2, including forward and backward two panels are laid
Switching-on mechanism between two panels, brake separating mechanism and the output shaft to be connect with killer switch ontology, it is characterised in that
: the switching-on mechanism includes motor and transmission shaft on the rear panel, the transmission shaft along axial direction be successively arranged a gear wheel,
The output shaft of one cam and a pawl, the motor is equipped with a pinion gear, list of the pinion gear through being sheathed on transmission shaft
Engaged to bearing with gear wheel, be hinged with a driving claw on the end face of the gear wheel, one end of the driving claw be connected in
The drive block apical grafting with concave part on transmission shaft, the other end of the driving claw is through being installed in the torsional spring of gear wheel end face
Connection, the transmission shaft pawl are located above front panel, and its end face is connect with the one end for the switching-in spring being located on front panel,
The other end of the switching-in spring is connected on front panel, and an idler wheel, the transmission crown of roll are hinged on the transmission axis cam
The path of idler wheel revolution on wheel is equipped with positioned at transmission shaft flanking part and the eccentric tug that can make idler wheel apical grafting at one end in portion
The path of son, the other end rotation of the bias pawl is equipped with the other end for being located at eccentric pawl side and can making eccentric pawl
The floodgate semiaxis in groove is snapped onto, the path of the rotation of the transmission axis cam is equipped with positioned at transmission shaft side and can make to pass
The output shaft of its rotation of moving axis actuated by cams.
At work, when earthing knife-switch is closed a floodgate, breaker cannot close a floodgate general isolation circuit breakers；Conversely, breaker closes
When lock, earthing knife-switch can not close a floodgate, and in order to prevent when earthing knife-switch is closed a floodgate, breaker is gone out due to the case where maloperation or automatic closing
It is existing, it needs when earthing knife-switch is closed a floodgate, so that breaker is by closing lock control or using interlocking form, so that breaker can not
It closes a floodgate.Above-mentioned patent to earthing knife-switch with breaker closing protection in terms of using the shape mutually agreed with by pin shaft and drive block
Formula is to prevent earthing knife-switch and the case where breaker closes a floodgate simultaneously, although solving this problem to a certain extent, the structure
Complexity, processing installation are inconvenient.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of isolation circuit breakers steerable systems, are able to solve isolation circuit breakers
In the breaker that is likely to occur and earthing knife-switch the case where closing a floodgate simultaneously.
In order to solve the above technical problems, the technical solution of the present invention is as follows: a kind of isolation circuit breakers steerable system, the isolation are disconnected
Road device steerable system is installed in control cabinet；Its innovative point is: the isolation circuit breakers steerable system includes mutual lock operation apparatus, tight
Blocking device and transmission mechanism；It mutual lock operation apparatus and closes between locking device through transmission mechanism connection；
The interlocking operating mechanism includes circuit breaker manipulation bar, earthing knife-switch console panel and earthing knife-switch drive rod；Circuit breaker manipulation bar
Orthogonal with earthing knife-switch console panel, earthing knife-switch drive rod is connected with one end of earthing knife-switch console panel；The circuit breaker manipulation bar includes bar
Body and cylinder, the body of rod and cylinder are coaxially disposed to form stepped shaft structure；The both ends of the body of rod are respectively arranged with screw thread, the body of rod
Both ends connection on-board the circuit breaker, the radius of the body of rod is denoted as R1；The cylinder is nested on the body of rod and by nut on the body of rod
It is fixed on the positioning, the outer radius of cylinder is denoted as R2；Circular hole and waist type groove are provided on the earthing knife-switch console panel；The waist type groove
It is arranged along the horizontal central line direction of earthing knife-switch console panel；The end of waist type groove is arranged in the circular hole, and circular hole and waist type groove penetrate through；
The width of the waist type groove is denoted as D1；The radius of the circular hole is denoted as R3；R1 < the D1 < R2 < R3；
It is described close locking device include substrate, driving motor, control motor, drive shaft, limit shaft sleeve, axle sleeve guide holder and
Travel switch；
The through-hole for accommodating driving motor and controlling motor, the driving motor and control electricity are respectively arranged on the substrate
Machine is vertically mounted on the same side of substrate, and the output end of driving motor and the output end of control motor both pass through on substrate
Through-hole extends to the another side of substrate；The driving motor output end is provided with bevel gear a, and the output end for controlling motor is provided with
Spur gear；The drive shaft is parallel to substrate, and drive shaft is connected on substrate by a bearing block, is provided with and drives in drive shaft
The bevel gear b that the bevel gear a of moving axis output end is matched, one end of drive shaft are provided with external screw thread；The limit shaft sleeve passes through
Axle sleeve guide holder is installed on substrate, the limit shaft sleeve along axis direction be provided with in drive shaft external screw thread cooperation in
Screw thread；
The rack gear with the spur gear cooperation of control motor output end is provided on the limit shaft sleeve；It is also set on limit shaft sleeve
It is equipped with the stroke control-rod for being parallel to substrate；The end of limit shaft sleeve is connected with transmission mechanism, the transmission mechanism by connecting rod with
Circuit breaker manipulation bar is connected, and connecting rod is provided with the limit film of cooperation limit shaft sleeve end；The axle sleeve guide holder include pedestal and
Guide plate, the pedestal and guide plate are each perpendicular to substrate；The bottom end of the guide plate is mounted on the base, and is arranged on guide plate
There is the circular hole for accommodating limit shaft sleeve；It is provided on the pedestal and accommodates the waist type groove that stroke control-rod passes through；
The travel switch has lower section a pair of and that guide holder bottom plate is arranged in, and the stroke control-rod on limit shaft sleeve is set
Between travel switch, stroke control-rod is by driving shaft-driven limit shaft sleeve drive to move back and forth between travel switch.
Further, one end of the drive shaft is provided with drive shaft regulation plate, is provided with drive on drive shaft regulation plate
Dynamic electric machine controller can switch to by closing drive motor controller and manually adjust drive shaft.
Further, it is provided with a link mechanism on the stroke control-rod, which includes straight-bar and right angle bar,
One end of the straight-bar is fixedly connected on stroke control-rod, and one end of the other end and right angle bar of straight-bar is hinged on by pin shaft
On substrate, the vertex and substrate of right angle bar are hinged, and the other end of right angle bar is provided with Sign Board.
Further, the control circuit for controlling motor system, the rack drives on limit shaft sleeve that driving motor drives
The spur gear movement of control motor output end is to realize control.
The present invention has the advantages that
1) by using earthing knife-switch console panel, circuit breaker manipulation bar；Circuit breaker manipulation bar passes through earthing knife-switch console panel, earthing knife-switch manipulation
The waist type groove of plate can move in the horizontal direction along the body of rod of circuit breaker manipulation bar and circuit breaker manipulation bar is in waist type groove
When can not move in the vertical direction, it is ensured that earthing knife-switch close a floodgate when breaker can not close a floodgate；The cylinder of circuit breaker manipulation bar can
It is moved in the vertical direction along the circular hole of earthing knife-switch console panel and earthing knife-switch console panel can not move in the horizontal direction, it is ensured that resolve
Earthing knife-switch can not close a floodgate when road device closes a floodgate；The stable structure is safely and conveniently installed on-board the circuit breaker；
2) by being provided with limit film on circuit breaker manipulation bar, limit film and the isolation circuit breakers close the limit of locking device
The end cooperation of position axle sleeve, when earthing knife-switch is closed a floodgate, the end that the limit film on breaker is limited axle sleeve is withstood, it is therefore prevented that open circuit
Device occurs due to the case where missing behaviour or automatic closing；
3) it is expert on process control bar and is provided with link mechanism, it can by the Sign Board being arranged on the link mechanism right angle bar
It is apparent from the working condition that the isolation circuit breakers close locking device；
4) by being provided with rack gear on the limit shaft sleeve that the isolation circuit breakers close locking device, which passes through spur gear
It is connected with control motor, so that entire isolation circuit breakers close locking device and are connected with circuit control, has both been able to satisfy and has closed a floodgate in earthing knife-switch
When control to breaker, and the isolation circuit breakers that can enable close locking device control circuit；
5) it is provided with a drive motor controller on plate by regulating and controlling in drive shaft, it can by closing drive motor controller
Switch to and manually adjust drive shaft, can by driving motor drive limit shaft sleeve with again pass through manual actuation limit shaft sleeve,
Ensure that the isolation circuit breakers close the operation multiplicity and stabilization of locking device.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the main view of isolation circuit breakers steerable system of the present invention.
Fig. 2 is the interlock perspective view of isolation circuit breakers steerable system of the present invention.
Fig. 3 is another angle perspective view of interlock of isolation circuit breakers steerable system of the present invention.
Fig. 4 closes locking device perspective view for isolation circuit breakers steerable system of the present invention.
Fig. 5 closes locking device main view for isolation circuit breakers steerable system of the present invention.
Specific embodiment
The following examples can make professional and technical personnel that the present invention be more fully understood, but therefore not send out this
It is bright to be limited among the embodiment described range.
Such as a kind of Fig. 1 isolation circuit breakers steerable system shown in Fig. 2, which installs control cabinet
It is interior；The isolation circuit breakers steerable system includes mutual lock operation apparatus 1, closes locking device 2 and transmission mechanism 3；Mutual lock operation apparatus 1
Connect 3 with closing by transmission mechanism between locking device 2 and connect.
Interlocking operating mechanism 1 includes circuit breaker manipulation bar 11, earthing knife-switch console panel 12 and earthing knife-switch drive rod 13；Circuit breaker manipulation
Bar 11 and earthing knife-switch console panel 12 are orthogonal, and earthing knife-switch drive rod 13 is connected with one end of earthing knife-switch console panel 12；The breaker behaviour
Vertical pole 11 includes the body of rod 111 and cylinder 112, and the body of rod 111 and the coaxial arrangement of cylinder 112 form stepped shaft structure；The body of rod 111
Both ends be respectively arranged with screw thread, on-board the circuit breaker, the radius of the body of rod 111 is denoted as R1 to the connection of the both ends of the body of rod 111；The cylinder
Body 112 is nested on the body of rod 111 and is fixed on the positioning on the body of rod 111 by nut, and the outer radius of cylinder 112 is denoted as R2；
Circular hole 121 and waist type groove 122 are provided on the earthing knife-switch console panel 12；The waist type groove 122 along earthing knife-switch console panel 12 water
Flat middle line direction setting；The end of waist type groove 122 is arranged in the circular hole 121, and circular hole 121 and waist type groove 122 penetrate through；The waist
The width of type groove 122 is denoted as D1；The radius of the circular hole 121 is denoted as R3；R1 < the D1 < R2 < R3.
Closing locking device 2 includes substrate 21, driving motor 22, control motor 23, drive shaft 24, limit shaft sleeve 25, axle sleeve
Guide holder 26 and travel switch 27.
The through-hole for accommodating driving motor 22 and controlling motor 23, the driving motor 22 and control are respectively arranged on substrate 21
Motor 23 processed is vertically mounted on the same side of substrate 21, and the output end of the output end and control motor 23 of driving motor 22 is equal
Through-hole on substrate extends to the another side of substrate 21；22 output end of driving motor is provided with bevel gear a221, control
The output end of motor 23 processed is provided with spur gear 231；Drive shaft 24 is parallel to substrate 21, and drive shaft 24 passes through a bearing block 241
Connection on the base plate (21, is provided with the bevel gear matched with the bevel gear a221 of 24 output end of drive shaft in drive shaft 24
One end of b242, drive shaft 24 are provided with external screw thread.
Limit shaft sleeve 25 is installed on the base plate (21 by axle sleeve guide holder 26, and the limit shaft sleeve 25 is set along axis direction
It is equipped with the internal screw thread cooperated with external screw thread in drive shaft 24；It is provided on the limit shaft sleeve 5 and control 23 output end of motor
The rack gear 251 that spur gear 231 cooperates；The stroke control-rod 252 for being parallel to substrate 21 is additionally provided on limit shaft sleeve 25；Limit shaft
The end of set 25 is connected with transmission mechanism 3, which is connected by connecting rod with circuit breaker manipulation bar 11, is arranged on connecting rod
There is the limit film of cooperation limit shaft sleeve end；Axle sleeve guide holder 26 include pedestal 261 and guide plate 262, the pedestal 261 with lead
Substrate 21 is each perpendicular to plate 262；The bottom end of the guide plate 262 is mounted on pedestal 261, and appearance is provided on guide plate 262
Receive the circular hole of limit shaft sleeve 25；It is provided on the pedestal 261 and accommodates the waist type groove that stroke control-rod 252 passes through.
Travel switch 27 has lower section a pair of and that guide holder bottom plate 261 is arranged in, the stroke control on limit shaft sleeve 25
Bar 252 is placed between travel switch 27, and the drive of limit shaft sleeve 25 that stroke control-rod 252 is driven by drive shaft 24 is opened in stroke
It closes and is moved back and forth between 27.
One end of drive shaft 24 is provided with drive shaft regulation plate 243, is provided with a driving on drive shaft regulation plate 243
Electric machine controller 244 can switch to by closing drive motor controller 244 and manually adjust drive shaft 24.
A link mechanism 253 is provided on stroke control-rod 252, which includes straight-bar 2531 and right angle bar
2532, one end of the straight-bar 2531 is fixedly connected on 252 on stroke control-rod, the other end and right angle bar 2532 of straight-bar 2531
One end by pin shaft hingedly on the base plate (21, the vertex and substrate 21 of right angle bar 2532 are hinged, right angle bar 2531 it is another
End is provided with Sign Board 2533.
23 control circuit system of motor is controlled, the rack gear 251 on limit shaft sleeve 25 that driving motor 22 drives drives control
The movement of spur gear 231 of 23 output end of motor is to realize control.
The working principle of the isolation circuit breakers steerable system is: by using earthing knife-switch console panel, circuit breaker manipulation bar；Open circuit
Device control stick passes through earthing knife-switch console panel, the waist type groove of earthing knife-switch console panel can along circuit breaker manipulation bar the body of rod in the horizontal direction
It can not be moved in the vertical direction when mobile and circuit breaker manipulation bar is in waist type groove, it is ensured that breaker when earthing knife-switch is closed a floodgate
It can not close a floodgate；The cylinder of circuit breaker manipulation bar can move and earthing knife-switch console panel in the vertical direction along the circular hole of earthing knife-switch console panel
It can not move in the horizontal direction, it is ensured that earthing knife-switch can not close a floodgate when breaker closing.
When earthing knife-switch is closed a floodgate, driving motor work, band dynamic bevel gear a rotary drive gives bevel gear b, bevel gear b to rotate band
Dynamic drive shaft rotates, and driving limit shaft sleeve is displaced along horizontal direction when the external screw thread in drive shaft rotates, so that limit shaft sleeve 5
The limit film that is moved on circuit breaker manipulation bar of end at and withstand limit film, the stroke control-rod being connected with limit shaft sleeve exists
Being moved to triggering travel switch at travel switch makes driving motor stop operating；It can also be logical by closing drive motor controller
It receives and distributes turn and moves drive shaft to make the limit film on limit shaft sleeve and circuit breaker manipulation bar cooperate.
It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, above-described embodiment and explanation
It is merely illustrated the principles of the invention described in book, without departing from the spirit and scope of the present invention, the present invention also has
Various changes and modifications, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention
It is defined by the appending claims and its equivalent thereof.
Claims (4)
1. a kind of isolation circuit breakers steerable system, which is mounted in control cabinet；It is characterized by: should
Isolation circuit breakers steerable system includes mutual lock operation apparatus, closes locking device and transmission mechanism；Mutual lock operation apparatus and close lock
It is connected between device by transmission mechanism；
The interlocking operating mechanism includes circuit breaker manipulation bar, earthing knife-switch console panel and earthing knife-switch drive rod；Circuit breaker manipulation bar and ground
Knife console panel is orthogonal, and earthing knife-switch drive rod is connected with one end of earthing knife-switch console panel；The circuit breaker manipulation bar include the body of rod and
Cylinder, the body of rod and cylinder are coaxially disposed to form stepped shaft structure；The both ends of the body of rod are respectively arranged with screw thread, and the two of the body of rod
On-board the circuit breaker, the radius of the body of rod is denoted as R1 for end connection；The cylinder is nested on the body of rod and is carried out on the body of rod by nut
Positioning is fixed, and the outer radius of cylinder is denoted as R2；Circular hole and waist type groove are provided on the earthing knife-switch console panel；The waist type groove along
The horizontal central line direction of earthing knife-switch console panel is arranged；The end of waist type groove is arranged in the circular hole, and circular hole and waist type groove penetrate through；It is described
The width of waist type groove is denoted as D1；The radius of the circular hole is denoted as R3；R1 < the D1 < R2 < R3；The locking device that closes includes base
Plate, driving motor, control motor, drive shaft, limit shaft sleeve, axle sleeve guide holder and travel switch；It is respectively set on the substrate
There is the through-hole for accommodating driving motor and controlling motor, the driving motor and control motor are vertically mounted on the same side of substrate
Side, the output end of driving motor and the output end of control motor both pass through the another side that the through-hole on substrate extends to substrate；Institute
It states driving motor output end and is provided with bevel gear a, the output end for controlling motor is provided with spur gear；The drive shaft is parallel to base
Plate, drive shaft are connected on substrate by a bearing block, and the bevel gear b matched with bevel gear a is provided in drive shaft, driving
One end of axis is provided with external screw thread；The limit shaft sleeve is installed on substrate by axle sleeve guide holder, the limit shaft sleeve along
Axis direction is provided with the internal screw thread cooperated with external screw thread in drive shaft；It is provided on the limit shaft sleeve and control motor output
The rack gear of the spur gear cooperation at end；The stroke control-rod for being parallel to substrate is additionally provided on limit shaft sleeve；The end of limit shaft sleeve
It is connected with transmission mechanism, which is connected by connecting rod with circuit breaker manipulation bar, and cooperation limit shaft sleeve is provided on connecting rod
The limit film of end；The axle sleeve guide holder includes pedestal and guide plate, and the pedestal and guide plate are each perpendicular to substrate；It is described
The bottom end of guide plate is mounted on the base, and the circular hole for accommodating limit shaft sleeve is provided on guide plate；Appearance is provided on the pedestal
The waist type groove that stroke control-rod of receiving passes through；The travel switch has lower section a pair of and that guide holder bottom plate is arranged in, limit shaft
Stroke control-rod is placed between travel switch on set, and stroke control-rod is by driving shaft-driven limit shaft sleeve to drive in stroke
It is moved back and forth between switch.
2. a kind of isolation circuit breakers steerable system according to claim 1, it is characterised in that: one end of the drive shaft is set
It is equipped with drive shaft regulation plate, drive motor controller is provided on drive shaft regulation plate, by closing drive motor controller
It can switch to and manually adjust drive shaft.
3. a kind of isolation circuit breakers steerable system according to claim 1, it is characterised in that: set on the stroke control-rod
It is equipped with a link mechanism, which includes straight-bar and right angle bar, and one end of the straight-bar is fixedly connected on stroke control-rod
On, the other end of straight-bar and one end of right angle bar are hinged on substrate by pin shaft, and the vertex and substrate of right angle bar are hinged, directly
The other end of angular pole is provided with Sign Board.
4. a kind of isolation circuit breakers steerable system according to claim 1, it is characterised in that: the control motor control electricity
Road system, the rack drives on limit shaft sleeve that driving motor drives control the spur gear movement of motor output end to realize control
System.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611050133.5A CN106783285B (en) | 2016-11-25 | 2016-11-25 | A kind of isolation circuit breakers steerable system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611050133.5A CN106783285B (en) | 2016-11-25 | 2016-11-25 | A kind of isolation circuit breakers steerable system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106783285A CN106783285A (en) | 2017-05-31 |
| CN106783285B true CN106783285B (en) | 2019-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611050133.5A Active CN106783285B (en) | 2016-11-25 | 2016-11-25 | A kind of isolation circuit breakers steerable system |
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| CN (1) | CN106783285B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106531537B (en) * | 2016-11-25 | 2018-08-10 | 江苏省如高高压电器有限公司 | A kind of isolation circuit breakers close locking device |
| CN113295993A (en) * | 2021-05-20 | 2021-08-24 | 中国南方电网有限责任公司超高压输电公司柳州局 | On-line monitoring device and method for opening and closing operation position states of circuit breaker |
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| CN103258669A (en) * | 2013-04-17 | 2013-08-21 | 中国西电电气股份有限公司 | Open position blocking device of breaker |
| KR101308754B1 (en) * | 2012-03-05 | 2013-09-12 | 엘에스산전 주식회사 | 3-position type load break switch |
| CN203588914U (en) * | 2013-08-30 | 2014-05-07 | 江苏省如高高压电器有限公司 | Electrical control device for operating mechanism of tripolar sulfur hexafluoride circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090108689A1 (en) * | 2007-10-29 | 2009-04-30 | Areva T&D Ag | electro-mechanical actuator, and a high or medium voltage disconnector having such an actuator |
| JP2011146199A (en) * | 2010-01-13 | 2011-07-28 | Toshiba Corp | Operating device for switch |
| CN102436949A (en) * | 2011-10-10 | 2012-05-02 | 山东泰开真空开关有限公司 | Mechanical interlocking device of isolating switch and ground switch |
| KR101308754B1 (en) * | 2012-03-05 | 2013-09-12 | 엘에스산전 주식회사 | 3-position type load break switch |
| CN103258669A (en) * | 2013-04-17 | 2013-08-21 | 中国西电电气股份有限公司 | Open position blocking device of breaker |
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| Publication number | Publication date |
|---|---|
| CN106783285A (en) | 2017-05-31 |
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