CN102290709A - Rear door interlocking of high voltage switch cabinet - Google Patents
Rear door interlocking of high voltage switch cabinet Download PDFInfo
- Publication number
- CN102290709A CN102290709A CN2011102295780A CN201110229578A CN102290709A CN 102290709 A CN102290709 A CN 102290709A CN 2011102295780 A CN2011102295780 A CN 2011102295780A CN 201110229578 A CN201110229578 A CN 201110229578A CN 102290709 A CN102290709 A CN 102290709A
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- mistake
- plate
- snap close
- switch cabinet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Patch Boards (AREA)
Abstract
The invention discloses a rear door interlocking of a high voltage switch cabinet, and relates to an interlocking device. Through an anti-misunlocking lock catch structure and an anti-mislocking safety protection structure, an anti-mislocking electrified high voltage switch cabinet is realized; and when the high voltage switch cabinet is mislocked, a base plate sinks due to the weight of a human body, and a compression column drives a sector plate, a horizontal connecting rod and a breaker, so as to lead that the high-tension switch cabinet can not be electrified, thus realizing that casualty accidents can be avoided from occurring in a double insurance manner.
Description
[technical field]
The present invention relates to a kind of interlock, the dual fail-safe back door that especially relates to a kind of high-tension switch cabinet is chain.
[background technology]
High-tension switch cabinet " interlocking " be to guarantee the power network safe operation, guarantee equipment and personal safety, prevent the important measures of misoperation; GB3906-1991 " 3-35 kilovolt ac metal closing switch gear " makes explicit provisions to this; Generally " interlocking " is described as: prevent that mistake from dividing, mistake is closed circuit breaker; Prevent the on-load branch, close isolating switch; Prevent charged extension (closing) earth connection (earthed switch); Prevent to be with ground connection (switch) combined floodgate, prevent mistakenly entering charged chamber; Above-mentioned five contents that prevent electric misoperation are called for short " five is anti-"; " five is anti-" device generally can be divided into machinery, electric and comprehensive three classes; At present, high-voltage switch gear Chinese parasol tree type is a lot of on the market, and great majority all have more perfect interlock method; But the interlocking that still has many high-tension switch cabinets is the mechanical interlocking imperfection especially, still can not reach " five is anti-" requirement fully.
The operating sequence of the isolating switch of circuit breaker both sides: GG-1A (F) one 07 schemes are as follows to the operating sequence regulation of the isolating switch of circuit breaker both sides: when having a power failure, and first striping trackside isolating switch; When sending electricity, the bus bar side isolating switch close earlier.Its effect is can dwindle the accident scope in order to guarantee by means of the protective effect of circuit breaker when contingency makes a mistake operation as far as possible, avoids artificially enlarging accident.The reason of elder generation's striping trackside isolating switch is during power failure: if in having a power failure misoperation takes place, as circuit breaker deenergization not as yet, keep apart the pass and divide earlier, cause on-load to operate a switch; Perhaps when branch was kept apart the pass, mistake had been divided the line disconnecting switch that should not stop again, all will cause arc short-circuit.In these cases, if divide the line side isolating switch earlier, because arc short-circuit point is in the circuit breaker outside, so the protective device of switch meeting would trip excision fault has been dwindled the accident scope.Otherwise, when sending electricity, if circuit breaker mistake at closing position, after when closing the bus bar side isolating switch, equal the bus bar side on-load and send.Arc short-circuit will take place, and fault is enlarged.In this case, as closing the bus bar side isolating switch earlier, and then zygonema trackside isolating switch; just equal to close a floodgate with line side isolating switch on-load, in case arc short-circuit takes place, because short dot is in the circuit breaker outside; so breaker protection gets final product would trip, the excision fault is dwindled the accident scope.To close the bus bar side isolating switch earlier when therefore sending electricity.
Over the years, the statistics of dog amount electric accident shows, personal electric shock injures and deaths and electric equipment accident, and often the technical operation standard with the electrician has direct relation.The strict electrical safety working regulation of pressing is operated, and can effectively reduce and avoid the generation of misoperation fault.But in real work, tend to take place rules and the conflicting situation of interlocking.As outlet sides such as KYN28A-12, JYN6-12 the switch cubicle of earthed switch is housed, because the interlocking function, cable vault's door (or cover plate) of switch cubicle can't be opened before the earthed switch that do not close, with preventing mistakenly entering charged chamber.And rules regulations have only the circuit of affirmation not have behind the electricity could splice grafting ground switch, certainly will to open cabinet door ability operational grounding switch after electrical verification affirmation circuit does not have electricity like this, rules are conflicted mutually with interlock requirement.For solving this type of problem, can adopt following method: the one, the line side installs charged demonstration additional, observes and does not have splice grafting ground, electricity back switch, or install electromagnetic lock additional on the earthed switch action bars, and guaranteeing can not splice grafting ground switch when circuit has electricity.The 2nd, gap allows careful electrical verification on the cabinet door.The 3rd, go up equipped emergency unlocking device at cable vault's door (or cover plate), use the specific purpose tool release by the professional.
Do not wish to adopt " passive type " interlocking in the design of high-tension switch cabinet, should adopt " active " interlocking as far as possible.For example adopt the switch cubicle of lever turnover for handcart, under the breaker closing state, the hole of handcart turnover rocking handle is blocked, rocking handle can't inject at all, and handcart also just can not move certainly.The patchhole of actuating earthed switch is designed to just be opened under enabled condition for another example, otherwise this patchhole is by shutoff, and the operation of mistake just can not be implemented.In all kinds of switch cubicles of existing use, there are many mechanical interlockings to adopt " passive type " interlocking,, should avoid this mode as far as possible along with the raising of switch cubicle design level.
Must ask for " five is anti-" in the national standard, except preventing that mistake from dividing, mistake is closed the suggestive method of this permission of circuit breaker, all the other interlock connections must complete realization in the switch cubicle structure.From the operation of switch cubicle, each interlock requirement all embodies in certain operation sequence, therefore no matter be that combined floodgate program or separating brake program all will reach interlock requirement.Prevent on-load deciliter isolating switch; Prevent that charged extension (closing) earth connection (switch) and band earth connection (switch) from closing a floodgate.But above-mentioned binomial requires not really want sometimes in same cabinet but requires to realize that between cabinet at this moment single mechanical interlocking often can not meet the demands.
[summary of the invention]
In order to overcome the deficiency in the background technology; it is chain that the present invention discloses a kind of back door of high-tension switch cabinet; the back door of described high-tension switch cabinet is chain has not only realized anti-error opening electrified high-tension switch cabinet by the anti-buckle structure that opens by mistake and the safety protection structure of anti-error lock; and when the generation high-tension switch cabinet has people's mistake to lock; body weight by human body is sunk base plate, and compression leg drives fanning strip, tranverse connecting rod and circuit breaker can't switch on high-tension switch cabinet.
For achieving the above object, the present invention adopts following technical scheme:
A kind of back door of high-tension switch cabinet is chain, comprises being used for the anti-buckle structure that opens by mistake; The safety protection structure that is used for anti-error lock; Describedly be used for the anti-buckle structure that opens by mistake and comprise doorframe, door, snap close A, snap close B, prevent opening by mistake plate, movable snap close, vertical connecting rod, tranverse connecting rod, dihedral plate, circuit-breaker switching on-off action bars and circuit breaker, be provided with the groove of wearing of up-down structure at the doorframe middle part, connect the anti-middle part point face that opens by mistake plate in door one side of wearing the groove bottom by axle, the anti-plate that opens by mistake is "＞" shape, be provided with the inserting column to the perforate of answering the door on the anti-top that opens by mistake plate of "＞" shape, "＞" shape is anti-to be opened by mistake the bottom of plate and wears the lock door mechanism that is provided with spring formation self-return between the groove inwall; Vertical connecting rod is fixed on the inboard of doorframe by at least two supporting bracket A, the upper end correspondence of vertical connecting rod is worn groove one side and is provided with movable snap close, the outside of described door is respectively equipped with correspondence and wears groove the snap close A and the snap close B on both sides up and down, the lower end of described vertical connecting rod is set to the sheave A to the bending of doorframe direction and corresponding tranverse connecting rod end, on the tranverse connecting rod at sheave A rear portion, be provided with return top board and return spring successively, the rear portion of return spring withstands on the supporting bracket B fixing on the bottom surface, the other end of tranverse connecting rod is enclosed within on the supporting bracket B fixing on another bottom surface, one end of the other end of tranverse connecting rod and dihedral plate is hinged, the middle part of dihedral plate is fixed on the support bar, the other end of the hinged dihedral plate in the lower end of circuit-breaker switching on-off action bars, the upper end of circuit-breaker switching on-off action bars connects the safety protection structure that circuit breaker forms anti-error lock; The described safety protection structure that is used for anti-error lock; be provided with spacing between base plate and the bottom surface; base plate is by the movable space of elastomer formation with the bottom surface; bottom surfaces at base plate is provided with compression leg; the sheave B activity that the compression leg lower end is provided with is pressed in the top of the bottom surfaces of fanning strip; the middle part of fanning strip is hinged with the support column upper end that is fixed on the bottom surface, and the top of fanning strip connects tranverse connecting rod, makes tranverse connecting rod and fanning strip form servo-actuated.
The back door of described high-tension switch cabinet is chain, the elastomer of described base plate and bottom surface movable space comprises base plate, spring gag lever post, top spring and casing seat, a plurality of spring gag lever posts are set in the bottom of base plate, be provided with the casing seat of corresponding spring gag lever post in the bottom surface, the top spring is enclosed within the casing seat, and top spring socket spring gag lever post and upper end withstand on the bottom surfaces of base plate.
The back door of described high-tension switch cabinet is chain, is provided with positive and negative silk regulating sleeve at the middle part of tranverse connecting rod, and described positive and negative silk regulating sleeve forms the length governor motion of tranverse connecting rod.
The back door of described high-tension switch cabinet is chain, and the middle part of described movable snap close is provided with two bendings and forms the pad lock structure of pressing close to snap close A or snap close B.
Because adopt aforesaid technical scheme, the present invention has following beneficial effect:
The back door of high-tension switch cabinet of the present invention is chain, by the anti-buckle structure that opens by mistake and the safety protection structure of anti-error lock, make the people can't open high-tension switch cabinet owing to be arranged on the anti-plate of wearing in the groove that opens by mistake by inserting column, so be merely able to movable snap close pressed down and make the anti-perforate that the inserting column that is provided with on the plate breaks away from the reveal face that opens by mistake, synchronous bending head drives tranverse connecting rod, the circuit-breaker switching on-off action bars makes circuit breaker cut off the power supply to high-tension switch cabinet and plays one deck protection, realized the purpose of anti-error opening electrified high-tension switch cabinet, when high-tension switch cabinet occurring and have people mistake to lock, body weight by human body is sunk base plate, and compression leg drives fanning strip, tranverse connecting rod and circuit breaker can't be switched on high-tension switch cabinet; The present invention has realized that the personnel casualty accidents of stopping of dual fail-safe form takes place.
[description of drawings]
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a switch cubicle of the present invention back door structural representation;
Fig. 3 is a movable buckle structure schematic diagram of the present invention;
Among the figure: 1, doorframe; 2, snap close A; 3, movable snap close; 4, wear groove; 5, snap close B; 6, supporting bracket A; 7, vertical connecting rod; 8, base plate; 9, return spring; 10, bending head; 11, sheave A; 12, return top board; 13, supporting bracket B; 14, bottom surface; 15, support column; 16, fanning strip; 17, sheave B; 18, compression leg; 19, top spring; 20, spring gag lever post; 21, positive and negative silk regulating sleeve; 22, casing seat; 23, dihedral plate; 24, tranverse connecting rod; 25, support bar; 26, circuit-breaker switching on-off action bars; 27, circuit breaker; 28, door; 29, inserting column; 30, axle connects; 31, the anti-plate that opens by mistake; 32, spring.
[embodiment]
Can explain the present invention in more detail by the following examples, the present invention is not limited to the following examples;
The back door of 1,2 or 3 described high-tension switch cabinets is chain in conjunction with the accompanying drawings, comprises being used for the anti-buckle structure that opens by mistake; The safety protection structure that is used for anti-error lock; Describedly be used for the anti-buckle structure that opens by mistake and comprise doorframe 1, door 28, snap close A2, snap close B5, the anti-plate 31 that opens by mistake, movable snap close 3, vertical connecting rod 7, tranverse connecting rod 24, dihedral plate 23, circuit-breaker switching on-off action bars 26 and circuit breaker 27, what be provided with up-down structure at doorframe 1 middle part wears groove 4, connect the 30 anti-middle part point faces that open by mistake plate 31 in door 28 1 sides of wearing groove 4 bottoms by axle, the anti-plate 31 that opens by mistake is "＞" shape, be provided with the inserting column 29 to 28 perforates of answering the door on the anti-top that opens by mistake plate 31 of "＞" shape, "＞" shape is anti-to be opened by mistake the bottom of plate 31 and wears 28 mechanisms of locking a door that are provided with spring 32 formation self-returns between groove 4 inwalls; Vertical connecting rod 7 is fixed on the inboard of doorframe 1 by at least two supporting bracket A6; the upper end correspondence of vertical connecting rod 7 is worn groove 4 one sides and is provided with movable snap close 3; the middle part of described movable snap close 3 is provided with two bendings and forms the pad lock structure of pressing close to snap close A2 or snap close B5; the outside of described door 28 is respectively equipped with snap close A2 and the snap close B5 that correspondence is worn groove both sides about in the of 4; the lower end of described vertical connecting rod 7 is set to the sheave A11 to the bending of doorframe 1 direction and corresponding tranverse connecting rod 24 ends; on the tranverse connecting rod 24 at sheave A11 rear portion, be provided with return top board 12 and return spring 9 successively; the rear portion of return spring 9 withstands on the supporting bracket B13 fixing on the bottom surface 14; be provided with positive and negative silk regulating sleeve 21 at the middle part of tranverse connecting rod 24; described positive and negative silk regulating sleeve 21 forms the length governor motion of tranverse connecting rod 24; the other end of tranverse connecting rod 24 is enclosed within on the supporting bracket B13 fixing on another bottom surface 14; one end of the other end of tranverse connecting rod 24 and dihedral plate 23 is hinged; the middle part of dihedral plate 23 is fixed on the support bar 25; the other end of the hinged dihedral plate 23 in the lower end of circuit-breaker switching on-off action bars 26, the upper end of circuit-breaker switching on-off action bars 26 connect the safety protection structure that circuit breaker 27 forms anti-error lock.
The described safety protection structure that is used for anti-error lock; be provided with spacing between base plate 8 and the bottom surface 14; base plate 8 is by the movable space of elastomer formation with bottom surface 14; described base plate 8 comprises base plate 8 with the elastomer of bottom surface 14 movable spaces; spring gag lever post 20; top spring 19 and casing seat 22; a plurality of spring gag lever posts 20 are set in the bottom of base plate 8; 14 casing seats 22 that are provided with corresponding spring gag lever post 20 in the bottom surface; top spring 19 is enclosed within the casing seat 22; top spring 19 socket spring gag lever posts 20 and upper end withstand on the bottom surfaces of base plate 8; bottom surfaces at base plate 8 is provided with compression leg 18; the sheave B17 activity that compression leg 18 lower ends are provided with is pressed in the top of the bottom surfaces of fanning strip 16; the middle part of fanning strip 16 is hinged with support column 15 upper ends that are fixed on bottom surface 14; the top of fanning strip 16 connects tranverse connecting rod 24, makes tranverse connecting rod 24 and fanning strip 16 form servo-actuated.
The back door of implementing high-tension switch cabinet of the present invention is chain, realize two pipe protections by the anti-buckle structure that opens by mistake and the safety protection structure of anti-error lock, arbitrary going wrong, another just can remedy, make the people can't open high-tension switch cabinet owing to be arranged on anti-plate 31 inserting column of wearing in the groove 4 29 under the effect of spring 32 that opens by mistake, so be merely able to movable snap close 3 is pressed down, spring 32 tightens up and makes the anti-perforate that the inserting column 29 that is provided with on the plate 31 breaks away from the reveal face that opens by mistake, synchronous bending 10 a drive tranverse connecting rod 24, circuit-breaker switching on-off action bars 26 makes 27 pairs of high-tension switch cabinet outages of circuit breaker play one deck protection, the present invention considers the length issue of tranverse connecting rod 24, be provided with the positive and negative silk regulating sleeve 21 of regulating length at the middle part of tranverse connecting rod 24, realized the purpose of anti-error opening electrified high-tension switch cabinet, when high-tension switch cabinet occurring and have people mistake to lock, body weight by human body is sunk base plate 8, and compression leg 18 drives fanning strip 16, tranverse connecting rod 24, circuit-breaker switching on-off action bars 26 and circuit breaker 27 can't be switched on high-tension switch cabinet; The present invention has realized that the personnel casualty accidents of stopping of dual fail-safe form takes place.
Part not in the detailed description of the invention is a prior art.
Claims (4)
1. the back door of a high-tension switch cabinet is chain, comprises being used for the anti-buckle structure that opens by mistake; The safety protection structure that is used for anti-error lock, it is characterized in that: describedly be used for the anti-buckle structure that opens by mistake and comprise doorframe (1), door (28), snap close A (2), snap close B (5), the anti-plate (31) that opens by mistake, movable snap close (3), vertical connecting rod (7), tranverse connecting rod (24), dihedral plate (23), circuit-breaker switching on-off action bars (26) and circuit breaker (27), what be provided with up-down structure at doorframe (1) middle part wears groove (4), connect (30) anti-middle part point face that opens by mistake plate (31) in door (28) one sides of wearing groove (4) bottom by axle, the anti-plate (31) that opens by mistake is "＞" shape, be provided with the inserting column (29) to (28) perforate of answering the door on the anti-top that opens by mistake plate (31) of "＞" shape, "＞" shape is anti-to be opened by mistake the bottom of plate (31) and wears (28) mechanism of locking a door that is provided with spring (32) formation self-return between groove (4) inwall; Vertical connecting rod (7) is fixed on the inboard of doorframe (1) by at least two supporting bracket A (6), the upper end correspondence of vertical connecting rod (7) is worn groove (4) one sides and is provided with movable snap close (3), the outside of described door (28) is respectively equipped with correspondence and wears groove (4) the snap close A (2) and the snap close B (5) on both sides up and down, the lower end of described vertical connecting rod (7) is set to the sheave A (11) to the bending of doorframe (1) direction and corresponding tranverse connecting rod (24) end, on the tranverse connecting rod (24) at sheave A (11) rear portion, be provided with return top board (12) and return spring (9) successively, the rear portion of return spring (9) withstands on bottom surface (14) and goes up on the fixing supporting bracket B (13), the other end of tranverse connecting rod (24) is enclosed within another bottom surface (14) and goes up on the fixing supporting bracket B (13), one end of the other end of tranverse connecting rod (24) and dihedral plate (23) is hinged, the middle part of dihedral plate (23) is fixed on the support bar (25), the other end of the hinged dihedral plate in the lower end of circuit-breaker switching on-off action bars (26) (23), the upper end of circuit-breaker switching on-off action bars (26) connects the safety protection structure that circuit breaker (27) forms anti-error lock; The described safety protection structure that is used for anti-error lock; be provided with spacing between base plate (8) and bottom surface (14); base plate (8) is by the movable space of elastomer formation with bottom surface (14); bottom surfaces at base plate (8) is provided with compression leg (18); sheave B (17) activity that compression leg (18) lower end is provided with is pressed in the top of the bottom surfaces of fanning strip (16); the middle part of fanning strip (16) is hinged with support column (15) upper end that is fixed on bottom surface (14); the top of fanning strip (16) connects tranverse connecting rod (24), makes tranverse connecting rod (24) and fanning strip (16) form servo-actuated.
2. the back door of high-tension switch cabinet according to claim 1 is chain, it is characterized in that: described base plate (8) comprises base plate (8), spring gag lever post (20), top spring (19) and casing seat (22) with the elastomer of bottom surface (14) movable space, in the bottom of base plate (8) a plurality of spring gag lever posts (20) are set, (14) are provided with the casing seat (22) of corresponding spring gag lever post (20) in the bottom surface, top spring (19) is enclosed within the casing seat (22), and top spring (19) socket spring gag lever post (20) and upper end withstand on the bottom surfaces of base plate (8).
3. the back door of high-tension switch cabinet according to claim 1 is chain, it is characterized in that: be provided with positive and negative silk regulating sleeve (21) at the middle part of tranverse connecting rod (24), described positive and negative silk regulating sleeve (21) forms the length governor motion of tranverse connecting rod (24).
4. the back door of high-tension switch cabinet according to claim 1 is chain, it is characterized in that: the middle part of described movable snap close (3) is provided with two bendings and forms the pad lock structure of pressing close to snap close A (2) or snap close B (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102295780A CN102290709A (en) | 2011-08-11 | 2011-08-11 | Rear door interlocking of high voltage switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102295780A CN102290709A (en) | 2011-08-11 | 2011-08-11 | Rear door interlocking of high voltage switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102290709A true CN102290709A (en) | 2011-12-21 |
Family
ID=45336902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102295780A Pending CN102290709A (en) | 2011-08-11 | 2011-08-11 | Rear door interlocking of high voltage switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102290709A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103295816A (en) * | 2013-06-21 | 2013-09-11 | 无锡中科电气设备有限公司 | Anti-misoperation mechanical interlocking device for cabinet |
| CN107171238A (en) * | 2017-07-12 | 2017-09-15 | 漳州新源电力工程有限公司电控设备厂 | A kind of safe intermediate switchgear cabinet |
| CN109412063A (en) * | 2017-08-16 | 2019-03-01 | 天津平高智能电气有限公司 | Breaker chamber interlock |
| CN109830899A (en) * | 2019-04-09 | 2019-05-31 | 李正华 | A kind of security protection electric power cabinet |
-
2011
- 2011-08-11 CN CN2011102295780A patent/CN102290709A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103295816A (en) * | 2013-06-21 | 2013-09-11 | 无锡中科电气设备有限公司 | Anti-misoperation mechanical interlocking device for cabinet |
| CN103295816B (en) * | 2013-06-21 | 2015-02-04 | 无锡中科电气设备有限公司 | Anti-misoperation mechanical interlocking device for cabinet |
| CN107171238A (en) * | 2017-07-12 | 2017-09-15 | 漳州新源电力工程有限公司电控设备厂 | A kind of safe intermediate switchgear cabinet |
| CN107171238B (en) * | 2017-07-12 | 2023-04-11 | 国网福建省电力有限公司漳州供电公司 | High middle-mounted switch cabinet of security |
| CN109412063A (en) * | 2017-08-16 | 2019-03-01 | 天津平高智能电气有限公司 | Breaker chamber interlock |
| CN109830899A (en) * | 2019-04-09 | 2019-05-31 | 李正华 | A kind of security protection electric power cabinet |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2570772C (en) | Gas-insulated medium-voltage switchgear | |
| CN203039283U (en) | Locking mechanism for earthing switch of switch cabinet | |
| CN101677177B (en) | Epoxy pouring type solid insulation switch with three-cabin | |
| CN102290709A (en) | Rear door interlocking of high voltage switch cabinet | |
| CN201699343U (en) | Indoor metal armouring draw-out switchgear | |
| CN201994576U (en) | Double-bus bar fixed metallic enclosed switching device | |
| CN201360106Y (en) | Drawer unit and cabinet body unit thereof with anti-misoperation function | |
| CN203983080U (en) | Mechanical interlocking device for circuit breaker | |
| CN108649478A (en) | 10kV Intelligent switch cabinet anti-misoperation apparatus | |
| CN103794390A (en) | Mechanical interlocking device with two-direction control function of high-voltage switchgear | |
| CN205943825U (en) | High pressure inlet wire cabinet and cabinet interlock that generates electricity certainly | |
| CN206894118U (en) | ring main unit grounding interlocking device | |
| CN202003869U (en) | Combined push-button switch device with mechanical interlock | |
| CN203367843U (en) | Five-prevention interlocking fixed type measuring cabinet with isolation | |
| CN104916489A (en) | Mine flame-proof intrinsically safe modular permanent magnet feeder switch | |
| CN101540480B (en) | Vacuum-load isolating switch-fuse combined electrical apparatus | |
| CN201868270U (en) | Electric control disconnector operating mechanism latching circuit | |
| CN203733669U (en) | Interlock system for outdoor high-voltage vacuum switch and disconnecting switch | |
| CN201315436Y (en) | Minitype armored movable metal closed switch device | |
| CN205489222U (en) | Chain operating device's of high -voltage board unlocking sheet structure | |
| CN209730534U (en) | A kind of novel medium voltage dual power switch cabinet | |
| CN218678539U (en) | Box-type transformer double-loop power supply safety conversion device | |
| CN211126466U (en) | Electric grounding knife control structure of high-voltage board | |
| EP1251615A2 (en) | Enclosed electrical switchgear cubicle for high voltage | |
| CN203883359U (en) | Unit sulfur hexafluoride ring main unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111221 |