CN106654958B - Dual power supply device and control method - Google Patents
Dual power supply device and control method Download PDFInfo
- Publication number
- CN106654958B CN106654958B CN201710020578.7A CN201710020578A CN106654958B CN 106654958 B CN106654958 B CN 106654958B CN 201710020578 A CN201710020578 A CN 201710020578A CN 106654958 B CN106654958 B CN 106654958B
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- front door
- rear door
- busbar
- door
- hole
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- 230000009977 dual effect Effects 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 10
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- 238000009413 insulation Methods 0.000 claims abstract description 19
- 230000007246 mechanism Effects 0.000 claims description 21
- 238000013519 translation Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 8
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- 238000012545 processing Methods 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 238000012805 post-processing Methods 0.000 abstract description 3
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- 238000005452 bending Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
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- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
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- 229920000647 polyepoxide Polymers 0.000 description 1
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- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- 239000010935 stainless steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/18—Switchgear having carriage withdrawable for isolation with isolation by vertical withdrawal
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/02—Details
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Patch Boards (AREA)
Abstract
The invention discloses a kind of dual power supply devices, including bracket, corresponding two busbar integral type insulation contact boxes for being fixed at cradle top two sides, supporting plate on bracket can be set to vertical lifting, multiple side line-outgoing type poles on the supporting plate, and mobile open-close type high-voltage isulation valve are set.The present invention is by busbar integral coating inside insulator, positioning and insulation are realized to busbar using insulator, safety in utilization is improved, and busbar is directly connected to inlet wire portion and outlet portion, is such as integrally formed or is welded to connect with the busbar, it reduces and is threadedly coupled, the insulation processing difficulty for reducing junction, is being poured after especially connecting busbar with inlet wire portion and outlet portion, natural that junction is screened wherein, post-processing difficulty is reduced, reliability is improved.
Description
Technical field
The present invention relates to double power supply converting switch equipment and its switchgear technical fields, supply more particularly to a kind of dual power supply
Electric installation and control method.
Background technique
Well known distribution technique field, draw-out mechanism are obtained due to having the characteristics that easy to operate, maintenance replacement is convenient
It is commonly used.Current techniques mostly use greatly the drawing mechanism of horizontal direction, and operator front level operates, in order to have enough
Horizontal depth, complete to be pulled out and in the completion of movement, the attached body of switchgear requires longitudinal depth, especially in high-voltage switch
In cabinet, the volume of cabinet body is increased so that high-tension switch cabinet longitudinal direction depth is larger using extraction structure.And existing valve
Mechanism is also to face to occupy the problems such as volume is big, and linkage is poor.Meanwhile existing busbar there is also overall volumes big, tie point
The problems such as easily causing fever more, and then influencing the insulation performance of insulating materials.
Summary of the invention
In view of the technical drawbacks of the prior art, it is an object of the present invention to provide a kind of dual power supply device and
Control method.
The technical solution adopted to achieve the purpose of the present invention is:
A kind of dual power supply device, including bracket, corresponding two busbar one for being fixed at cradle top two sides
The supporting plate on bracket can be arranged in vertical lifting in formula insulation contact box, and multiple side line-outgoing types on the supporting plate are arranged in
Pole, and mobile open-close type high-voltage isulation valve；The busbar integral type insulation contact box include three interval Boulezs and
Insulated body coats busbar therein, respectively corresponds the inlet wire for being arranged in and exposing in the self-insulating body in the busbar both ends and outer end
End and leading-out terminal, and be correspondingly arranged with the end of incoming cables and with side outlet pole correspondingly with the insulator one
The contact box that body is formed or is fixedly connected；
The mobile open-close type high-voltage isulation valve includes asynchronous or incorgruous in the same direction when being arranged in parallel and being driven
The front door and Rear Door of translation are respectively arranged on the front door and Rear Door corresponding with main bus-bar and contact box logical
Hole, at open position, front door and Rear Door are driven positioned at the position of through-hole correspondence, described at closed position
Front door and Rear Door be driven asynchronous movement in the same direction, the through-hole of front door and Rear Door is staggered will be led to using no hole site
Hole closing.
The insulator includes the inlet wire portion and outlet portion in angle, the width in the outlet portion be greater than it is described into
It the width in line portion and is formed in two sides and climbs electric wall, the leading-out terminal is arranged on the connection panel that two climb between electric wall.
It is formed with step on connection panel, the leading-out terminal is correspondingly arranged on step surface.
The insulator is fixed at bracket side by positioning framework, the insulator and positioning framework
Corresponding installation side is formed with caulking groove corresponding with the frame body of positioning framework.
The front door and Rear Door, which is driven, to be horizontally or vertically translatable, the front door and Rear Door respectively with
Mobile supporting mechanism is provided between bracket.
The mobile supporting mechanism includes the sliding rail being fixedly connected with the front door or Rear Door, is arranged in correspondence with
On bracket and in the multiple deflector rolls or guide wheel of the setting of two rows, the deflector roll or guide wheel by sliding rail clamping position wherein.
The mobile supporting mechanism includes the linear guide being fixed on the bracket, accordingly with it is described
Front door or Rear Door be fixedly connected and with the matched multiple sliding blocks of linear guide.
The driving mechanism of the front door and Rear Door includes being fixedly connected respectively with the front door or Rear Door
Or it is integrally formed and along the rack gear that moving direction extends, be correspondingly arranged with the rack gear and different-diameter or with two rack gears
Meshed gears simultaneously, and the driving portion of gear rotation described in driving.
A kind of control method of dual power supply device, includes the following steps,
1) when moving contact and main bus-bar and end of incoming cables are connected, the through-hole correspondence of front door and Rear Door, which is formed, allows institute
The channel that the moving contact for the side line-outgoing type pole stated is walked；
2) after moving contact and main bus-bar and end of incoming cables disconnect and the through-hole of front door and Rear Door is left in moving contact end,
Front door and Rear Door are driven asynchronous or reversed translation in the same direction；
3) before and after the through-hole of front door and Rear Door leaves main bus-bar and contact box and the through-hole of front door and Rear Door
Stop driving when being staggered and keeps closed state.
Compared with prior art, the beneficial effects of the present invention are:
Executing agency is arranged on liftable supporting plate the present invention, takes full advantage of height space, simplifies movement machine
Structure, the present invention is using the front door and Rear Door for leading to the setting of mobile and time interval, the form stacked using front and back, effectively saves
The design space of valve is saved, realizes driving mechanism miniaturization, it is structurally reasonable, using front door and Rear Door by handcart intermittent driving
The action control of translation realizes the corresponding overlapping of through-hole or is staggered, safety is effectively ensured, realizes succinct, reliable in action.This hair
It is bright by busbar integral coating inside insulator, using insulator to busbar realize positioning and insulation, improve safety in utilization, and
And busbar is directly connected to inlet wire portion and outlet portion, is such as integrally formed or is welded to connect with the busbar, reduces and be threadedly coupled,
The insulation processing difficulty for reducing junction, is being poured after especially connecting busbar with inlet wire portion and outlet portion, naturally will
Junction is screened wherein, and post-processing difficulty is reduced, and improves reliability.
Detailed description of the invention
Fig. 1 show the structure schematic side view of busbar integral type insulation contact box of the invention；
Fig. 2 show the stereoscopic schematic diagram of the structure of busbar integral type insulation contact box of the invention；
Fig. 3 show Rear Door structural schematic diagram；
Fig. 4 show valve mechanism side view.
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that described herein
Specific embodiment be only used to explain the present invention, be not intended to limit the present invention.
As shown in Figs 1-4, a kind of dual power supply device of the invention, including bracket, are fixed at cradle top one
The busbar integral type insulation contact box of side, can be arranged in vertical lifting the supporting plate on bracket 97, be arranged on the supporting plate
Multiple side line-outgoing type poles 70, and mobile open-close type high-voltage isulation valve；The busbar integral type insulation contact box packet
Include three interval Boulezs and insulated body and coat busbar 81,82,83 therein, respectively correspond be arranged in the busbar both ends and
The end of incoming cables 84 exposed in the self-insulating body in outer end and leading-out terminal 85, and be correspondingly arranged with the end of incoming cables and with side outlet pole
Column is integrally formed or is fixedly connected with the insulator correspondingly, such as the contact box 86 of bonding；Outlet portion is outer end face
Expose the bulk except insulator, is provided with to the connecting hole with cable connection, the end of incoming cables 84 is similarly dew
Except insulator and extend the plate of preset distance to be electrically connected as static contact with moving contact realization out.Wherein, described exhausted
Edge body is glass fibre or epoxy resin or other insulating materials, busbar and the insulator formed by integrally casting or other modes into
The processing of row clad type.
The box-like insulation valve that is translated apart includes asynchronous or reverse sync in the same direction when being arranged in parallel and being driven
The front door 91 and Rear Door 92 of translation, are respectively arranged on the front door and Rear Door and main bus-bar and bus rank
Set through-hole 93 that is corresponding and allowing contact to pass through, wherein the front door and Rear Door is integrally in zigzag structure, is wrapped respectively
Head slab and L-type side plate that is integrally formed with the head slab or being fixedly connected are included, being provided on head slab can
Matching allows the through-hole walked for contacting first 71 of 70 upper end of side line-outgoing type pole, to contact the contact box 94 of head and main bus-bar
It is turned on or off, is provided with L-type through-hole on L-type side plate to be correspondingly arranged at 73 end of tilting section and the contact with bus bar 90
The movement of the corresponding lower contact 72 of box, the stroke of L-type side plate is realized using L-type through-hole.Front door and Rear Door regard specific work
Condition can carry out the translation of any direction, be such as driven and be horizontally or vertically translatable.When needing to connect, that is, contact first 71 and main mother
When the conducting of contact box 94 of line, the contact box conducting of lower contact 72 and bus bar 90, i.e. pole on supporting plate and main bus-bar and mother
When line row's conducting, the front door and Rear Door of the side are driven positioned at the position of through-hole correspondence, at this time contacting on pole
The through-hole that head and lower contact pass through overlapping state on front door and Rear Door is connect with main bus-bar or with bus bar, is needing to disconnect
When, that is, when contacting that head and main bus-bar disconnect, lower contact and bus bar disconnect, the front door and Rear Door be driven it is mobile with
Through-hole is staggered and realizes the closing in space locating for main bus-bar and bus bar, i.e., the through-hole on two plate of front door and Rear Door is staggered
It is arranged and has effectively formed the completely masking to main bus-bar and bus bar connecting pin.Between the front door and Rear Door is
Every setting, the front door and Rear Door are stainless steel plate body or insulation board.
Wherein, the side line-outgoing type pole can be used disclosed in Chinese patent CN106024499A, not repeat again herein.
Busbar integral coating inside insulator, is realized positioning and insulation to busbar using insulator, improved by the present invention
Safety in utilization, and busbar is directly connected to inlet wire portion and outlet portion, is such as integrally formed or is welded to connect with the busbar,
Reduce be threadedly coupled, reduce the insulation processing difficulty of junction, after especially busbar is connect with inlet wire portion and outlet portion into
Row casting, it is natural that junction is screened wherein, post-processing difficulty is reduced, reliability is improved.Executing agency is arranged the present invention
On liftable supporting plate, height space is taken full advantage of, simplifies actuating mechanism, the present invention, which uses, leads between mobile and front and back
Every the front door and Rear Door of setting, the form stacked using front and back effectively saves the design space of valve, realizes driving mechanism
Miniaturization, structurally reasonable, the action control translated using front door and Rear Door by handcart intermittent driving realize that through-hole is corresponding
It is overlapped or is staggered, safety is effectively ensured, realize succinct, reliable in action.
Specifically, the insulator includes the inlet wire portion and outlet portion in angle.The angle is acute angle, right angle
Or the straight angle, the shape of busbar and insulator can be any adaptation shape to improve its scene adaptability.
By taking inlet wire portion and outlet portion are at right angle Boulez as an example, the width in the outlet portion is greater than the width in the inlet wire portion
It spends and is formed in two sides and climb electric wall 821, the leading-out terminal 85 is arranged on the connection panel 822 that two climb between electric wall, described
Connection panel on be formed with step perhaps the inclined face leading-out terminal be correspondingly arranged on step surface or inclined surface
On.
Using the biggish outlet portion of width and in two sides, electric wall is climbed in setting, while improving insulating properties, because increasing out
The installation space in line portion, operates when convenient for being electrically connected with cable, improves ease of use.The especially setting of step, from lower and
On successively step outstanding to be subsequent provides larger operating space and adaptability with cable installation forward.Meanwhile to improve
The busbar 83 of the insulating properties of three busbars of bending part, inside bends inwards in step-like, and intermediate 82 bending part of busbar is inclined
The busbar 81 of setting, outside is right-angle bending, and three matches, and while guaranteeing insulation distance between any two, reduces whole body
Product.
Specifically, for the intracorporal positioning framework location and installation of cabinet, in the corresponding with positioning framework of the insulator
Installation side is formed with caulking groove 87 corresponding with the frame body of positioning framework, using the cooperation of caulking groove and frame body, can guarantee in after installation
Side plane is opposed flattened, reduces space hold, meanwhile, be fixedly installed on the insulator fixed mounting hole so as to it is fixed
Position frame is bolted.
Preferably, fluted 88 are formed between the open side of two adjacent contact boxs, in the bottom surface of groove
On be provided with connection bolt, designed using groove type, increase creepage distance, reduce the depth of contact box.Meanwhile it is big to cooperate
The contact box of depth is formed with gap 89 on the side with pole of the contact mouth open side so as to the moving contact of pole
It is inserted into and is electrically connected therewith.The contact box outer surfac covering layer of conductive material or semiconductor material is anti-to improve electromagnetism
Interference, reduction moving contact and static contact electromagnetic interference external when being switched on or switched off.
It preferably, is the mobility for improving front door and Rear Door, the front door and Rear Door are respectively between bracket
It is provided with mobile supporting mechanism.As shown, the mobile supporting mechanism includes fixing with the front door or Rear Door
The sliding rail 96 of connection, is arranged in correspondence on bracket 97 and in the multiple deflector rolls or guide wheel 98 of the setting of two rows, the deflector roll or
Guide wheel by sliding rail clamping position wherein.By taking front door and rear panel move horizontally as an example, the deflector roll or guide wheel are accordingly set
It sets in the two sides up and down of sliding rail, while being provided on the lower planes of sliding rail and the deflector roll or guide wheel 98 is corresponding leads
Slot utilizes the inserted type of guide groove and deflector roll or guide wheel using two groups of rotatable deflector rolls or guide wheel by guide rail clamping position
Guidance, positioning move for it and realize guiding and constraint, and support effect is good and mobile steady, effectively meet the normal operation of equipment.
It certainly, is the translation for realizing front door and Rear Door, also using guide rail slide block mechanism, i.e. the mobile support
Mechanism includes the linear guide being fixed on the bracket, is accordingly fixedly connected with the front door or Rear Door
And with the matched multiple sliding blocks of linear guide.
It specifically, is the asynchronous driving in the same direction described in realizing, the driving mechanism of the front door and Rear Door includes
With it is described be fixedly connected or be integrally formed with front door or Rear Door and along moving direction extend rack gear, such as directly in sliding rail
One section of rack gear of upper formation, is correspondingly arranged and the gear of different-diameter with the rack gear, and the driving gear rotation
Driving portion, such as driving motor or driving handwheel.The rack-and-pinion of two groups of different-diameters is moved using a motor or driving gear band
The asynchronous driving in the same direction can be realized in mechanism, saves control and machine cost, and the progress of other mechanisms can also be used certainly
Driving.
Driving for reverse sync can directly adopt a gear while engage with two rack gears, two engagement separations
The synchronous backward movement of the front door and Rear Door can be realized in gear two sides, and it is corresponding or wrong up and down that through-hole can be realized
It opens.
A kind of control method of dual power supply device of the invention, includes the following steps,
1) when moving contact and main bus-bar and end of incoming cables are connected, the through-hole correspondence of front door and Rear Door, which is formed, allows institute
The channel that the contact for the side line-outgoing type pole stated is walked；
2) after moving contact and main bus-bar and end of incoming cables disconnect and the through-hole of front door and Rear Door is left in moving contact end,
Front door and Rear Door are driven asynchronous or reversed translation in the same direction；
3) before and after the through-hole of front door and Rear Door leaves main bus-bar and contact box and the through-hole of front door and Rear Door
Stop driving when being staggered and keeps closed state.
The above is only a preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of dual power supply device, which is characterized in that including bracket, corresponding two for being fixed at cradle top two sides
Busbar integral type insulation contact box, can be arranged in vertical lifting the supporting plate on bracket, be arranged in multiple on the supporting plate
Side line-outgoing type pole, and mobile open-close type high-voltage isulation valve；The busbar integral type insulation contact box is including between three
Every Boulez and insulated body cladding busbar therein, respectively corresponds to be arranged in the self-insulating body in the busbar both ends and outer end and reveal
End of incoming cables and leading-out terminal out, and be correspondingly arranged with the end of incoming cables and with side outlet pole correspondingly with it is described
The contact box that insulator is integrally formed or is fixedly connected, the insulator include the inlet wire portion and outlet portion in angle；
The mobile open-close type high-voltage isulation valve includes asynchronous or incorgruous translation in the same direction when being arranged in parallel and being driven
Front door and Rear Door, be respectively arranged with through-hole corresponding with main bus-bar and contact box on the front door and Rear Door,
At open position, front door and Rear Door are driven positioned at the position of through-hole correspondence, at closed position, before described
Door-plate and Rear Door are driven asynchronous movement in the same direction, and the through-hole of front door and Rear Door is staggered to be sealed through-hole using no hole site
It closes；The front door and Rear Door, which is driven, to be horizontally or vertically translatable, the front door and Rear Door respectively with bracket
Between be provided with mobile supporting mechanism.
2. dual power supply device as described in claim 1, which is characterized in that the width in the outlet portion is greater than described
It the width in inlet wire portion and is formed in two sides and climbs electric wall, the leading-out terminal is arranged on the connection panel that two climb between electric wall.
3. dual power supply device as claimed in claim 2, which is characterized in that it is formed with step on connection panel, it is described
Leading-out terminal be correspondingly arranged on step surface.
4. dual power supply device as described in claim 1, which is characterized in that the insulator is fixed by positioning framework
It is arranged in bracket side, is formed with the frame body pair with positioning framework in the installation side corresponding with positioning framework of the insulator
The caulking groove answered.
5. dual power supply device as described in claim 1, which is characterized in that the mobile supporting mechanism include with it is described
Front door or the sliding rail that is fixedly connected of Rear Door, be arranged in correspondence on bracket and in multiple deflector rolls of two rows setting or lead
Wheel, the deflector roll or guide wheel by sliding rail clamping position wherein.
6. dual power supply device as described in claim 1, which is characterized in that the mobile supporting mechanism includes that fixation is set
Set the linear guide on the bracket, be accordingly fixedly connected with the front door or Rear Door and with the straight line
Multiple sliding blocks of guide rail.
7. dual power supply device as described in claim 1, which is characterized in that the driving machine of the front door and Rear Door
Structure includes with the front door or Rear Door being fixedly connected or being integrally formed respectively and along the rack gear that moving direction extends, with institute
The rack gear stated be correspondingly arranged and different-diameter or with two rack gears meshed gears simultaneously, and the gear rotation that driving is described
Driving portion.
8. a kind of control method of dual power supply device as described in claim 1, which is characterized in that include the following steps,
1) when moving contact and main bus-bar and end of incoming cables are connected, the through-hole correspondence of front door and Rear Door is formed described in permission
The channel that the moving contact of side line-outgoing type pole is walked；
2) after moving contact and main bus-bar and end of incoming cables disconnect and contact end leaves the through-hole of front door and Rear Door, front door
Asynchronous or reversed translation in the same direction is driven with Rear Door；
3) it is staggered before and after the through-hole of front door and Rear Door leaves main bus-bar and contact box and the through-hole of front door and Rear Door
When stop drive and keep closed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710020578.7A CN106654958B (en) | 2017-01-12 | 2017-01-12 | Dual power supply device and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710020578.7A CN106654958B (en) | 2017-01-12 | 2017-01-12 | Dual power supply device and control method |
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| Publication Number | Publication Date |
|---|---|
| CN106654958A CN106654958A (en) | 2017-05-10 |
| CN106654958B true CN106654958B (en) | 2019-06-11 |
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ID=58843013
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710020578.7A Active CN106654958B (en) | 2017-01-12 | 2017-01-12 | Dual power supply device and control method |
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| Country | Link |
|---|---|
| CN (1) | CN106654958B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101320891A (en) * | 2008-06-12 | 2008-12-10 | 高赟 | Side-installed shifting type high-tension switch cabinet |
| EP2453539A2 (en) * | 2010-11-15 | 2012-05-16 | General Electric Company | Undercarriage and keylock assembly for use with a circuit breaker |
| CN202308874U (en) * | 2011-10-08 | 2012-07-04 | 江苏大全长江电器股份有限公司 | Large-current contact box having radiating channel |
| CN203039283U (en) * | 2013-01-14 | 2013-07-03 | 杭州电力设备制造有限公司 | Locking mechanism for earthing switch of switch cabinet |
| CN206640191U (en) * | 2017-01-12 | 2017-11-14 | 天津市先智电气设备有限公司 | High safety type dual power supply device |
-
2017
- 2017-01-12 CN CN201710020578.7A patent/CN106654958B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101320891A (en) * | 2008-06-12 | 2008-12-10 | 高赟 | Side-installed shifting type high-tension switch cabinet |
| EP2453539A2 (en) * | 2010-11-15 | 2012-05-16 | General Electric Company | Undercarriage and keylock assembly for use with a circuit breaker |
| CN202308874U (en) * | 2011-10-08 | 2012-07-04 | 江苏大全长江电器股份有限公司 | Large-current contact box having radiating channel |
| CN203039283U (en) * | 2013-01-14 | 2013-07-03 | 杭州电力设备制造有限公司 | Locking mechanism for earthing switch of switch cabinet |
| CN206640191U (en) * | 2017-01-12 | 2017-11-14 | 天津市先智电气设备有限公司 | High safety type dual power supply device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106654958A (en) | 2017-05-10 |
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