CN206602310U - The intensive dual-power transfer switch of side wiring - Google Patents
The intensive dual-power transfer switch of side wiring Download PDFInfo
- Publication number
- CN206602310U CN206602310U CN201720297609.9U CN201720297609U CN206602310U CN 206602310 U CN206602310 U CN 206602310U CN 201720297609 U CN201720297609 U CN 201720297609U CN 206602310 U CN206602310 U CN 206602310U
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- Prior art keywords
- pole
- poles
- power transfer
- transfer switch
- handcart
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Abstract
The utility model discloses a kind of intensive dual-power transfer switch of side wiring, including the handcart that can be moved forward and backward, the vertical support plate being fixedly connected with described handcart, level is fixedly installed on 3 groups of poles on described vertical support plate, every group of pole includes three between the upper and lower every three poles of Boulez, and 3 groups of described poles with electrical equipment and two power supplys respectively to connect.A kind of integrated double-power switching switch of use side wiring pole arrangement of the utility model coordinates set of execution mechanism using three groups of poles, executing agency is mechanical operating mechanism or permanent magnet mechanism etc., such as breaker, using side assembling structure, with the A that arranged above and below the binding post of each circuit, B, C three-phases, such as set in top protruding-type is step-like, it is easy to wiring and the from top to bottom design of indent, reduce interfering for each interpolar of circuit, simultaneously, the pole for placing side by side setting using three groups, one binding post of each pole correspondence, breach needs the design of 12 binding posts in the past, pole is taken up space and compressed, greatly reduce switch cubicle volume.
Description
Technical field
The utility model is related to electric switch technical field, and more particularly to a kind of intensive dual power supply conversion of side wiring is opened
Close.
Background technology
Traditional breaker three-phase pole generally uses formal dress mode, because so facilitating wiring, at the same it is also attractive in appearance, still
The drawbacks of this mounting means is present is to cause switch cubicle width to increase, floor space increase.Simultaneously because the handcart of breaker
Move mode in cabinet is movable, and the depth of cabinet is also accordingly deepened.By taking KYN28 metal closed switch cabinets as an example, break
Road device car needs movable 200 millimeters distance from testing position to operating position, therefore KYN28 cabinet depth reaches
1500 millimeters.Cabinet depth is the important indicator for influenceing switch cubicle in electric substation's floor space, especially when switch cubicle opposite
Influence of the cabinet depth size to floor space is especially prominent during arrangement.It is pointed out that when switch cubicle is used in mine down-hole
During the specific occasions such as electric substation, the depth of cabinet is excessive to cause transport and installation difficulty, and make Underground Substation span excessive and
Increase cost, pressed on ground big occasion even can not arranged on opposite sides, so, electric switch miniaturization is the hair of global device for switching
Exhibition trend.
The content of the invention
The purpose of this utility model is to be directed to technological deficiency present in prior art, and it is intensive to provide a kind of side wiring
Dual-power transfer switch.
To realize that the technical scheme that the purpose of this utility model is used is：
A kind of intensive dual-power transfer switch of side wiring, including the handcart that can be moved forward and backward, are fixed with described handcart
The vertical support plate of connection, level is fixedly installed on 3 groups of poles on described vertical support plate, and every group of pole includes three
It is individual between the upper and lower every Boulez three poles, described 3 groups of poles are used to connect with electrical equipment and two power supplys respectively
It is logical.
3 groups of described poles are included positioned at middle to be connected by corresponding binding post with electrical equipment
Outlet pole, and two of the described outlet pole left and right sides of separation pass through binding post and entering that two power supplys are connected respectively
Line pole.
Limiting section is provided with the walking track front end of described handcart or side, the trailing flank of described limiting section is
The docking section matched with described limiting section, described docking are formed with the inclined-plane that upper side edge is protruded forward, described handcart
The leading flank in portion is corresponding with described inclined-plane domatic, and described limiting section is joined directly together by wire with earth point.
A kind of intensive dual-power transfer switch of side wiring, including can vertical lifting supporting plate, can described supporting plate relatively
Movable handcart, the horizontal support plate being fixedly connected with described handcart is fixedly installed on described horizontal support plate vertically
3 groups of poles, every group of pole include three poles of three time interval Boulezs, 3 groups of described sealing poles
Post with electrical equipment and two power supplys respectively to connect.
3 groups of described poles are included positioned at the middle outlet pole connected by binding post with electrical equipment,
With two of the outlet pole left and right sides described in the separation inlet wire poles connected respectively by binding post with two power supplys.
Be provided with limiting section in the front end or side of described supporting plate, the trailing flank of described limiting section for upper side edge to
It is formed with the docking section matched with described limiting section on the inclined-plane of preceding protrusion, described handcart, the front side of described docking section
Face is corresponding with described inclined-plane domatic, and described limiting section is joined directly together by wire with earth point.
The elevating mechanism of described supporting plate include being hinged on two below supporting plate be in splayed Boulez support arm, it is and described
Support arm lower end be connected and the bottom rail road that is fixedly connected with support, and directly driven by screw-nut body described
Supporting plate lifts or driven the screw-nut body of described support arm lower end folding.
Also include two described support arm lower ends are locked from into its separated retaining mechanism, described support arm lower end is set
The sliding block with described bottom Orbit Matching is equipped with to realize being slidably matched for the described relative bottom rail road in support arm lower end, described lock
The strip ratchet that tight mechanism includes being fixedly installed on the sliding block and extended along bottom orbital direction, opposite brackets are rotatable solid
Spine fixed and corresponding with described ratchet refers to, and can drive described spine refer to it is synchronous outwardly or inwardly overturn so that its keep or
Depart from the control lever contacted with ratchet.
Described retaining mechanism also includes the swingle along described bottom orbital direction extension, is arranged on described swingle
On at least one pair of tight lock part, the described swingle of rotation can realize locking or release of the tight lock part to support arm lower end.
Described binding post is L-type busbar integral type insulation contact box, and the supporting mechanism of insulation contact box includes fixing
The column of insulation contact box bending part is arranged on, the rear column of insulation contact box rear end is fixedly installed on, connection column is stood with rear
The side shield of post, the bottom support bar to support described insulation contact box horizontal part being fixedly connected with described side shield,
And the bearing diagonal being fixedly connected with the vertical portion of described insulation contact box, it is vertical with contact box that described bearing diagonal includes
The side connecting plate that portion is fixedly connected, the oblique connection that two ends are bolted to connection with described side connecting plate and column respectively
Bar.
Compared with prior art, the beneficial effects of the utility model are：
A kind of integrated double-power switching switch of use side wiring pole arrangement of the utility model is using three groups of sealing poles
Post coordinates set of execution mechanism, and executing agency is mechanical operating mechanism or permanent magnet mechanism etc., such as breaker, using side assembling structure,
With A, B, C three-phase of being arranged above and below the binding post of each circuit, such as set in top protruding-type is step-like, be easy to wiring and by upper
And the design of lower indent, interfering for each interpolar of circuit is reduced, meanwhile, the pole for placing side by side setting using three groups, often
One binding post of individual pole correspondence, breach needs the design of 12 binding posts in the past, by pole institute duty
Between compressed, greatly reduce switch cubicle volume.
Brief description of the drawings
Fig. 1 show the pole mounting structure side view of the intensive dual-power transfer switch of side wiring of the present utility model
Schematic diagram.
The pole mounting structure that Fig. 2 show the intensive dual-power transfer switch of side wiring of the present utility model is faced
Schematic diagram.
Fig. 3 show the pole mounting structure strabismus of the intensive dual-power transfer switch of side wiring of the present utility model
Schematic diagram.
Fig. 4 show the structural representation of the elevating mechanism of the intensive dual-power transfer switch of the utility model side wiring；
Fig. 5 show the side view action schematic diagram shown in Fig. 4；
Fig. 6 show the side structure schematic view shown in Fig. 4；
Fig. 7 show limiting section and docking section structural representation；
Fig. 8 show the A portions close-up schematic view shown in Fig. 5,
Fig. 9 show the B portions close-up schematic view shown in Fig. 5.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that this place
The specific embodiment of description only to explain the utility model, is not used to limit the utility model.
First specific embodiment
As illustrated, the intensive dual-power transfer switch of side wiring of the present utility model includes the handcart that can be moved forward and backward
100, be fixedly connected with described handcart or formation is fixedly installed horizontal-extendingly in the vertical support plate 110 at handcart back
3 groups of poles 120 on described vertical support plate, every group of pole includes three between the upper and lower every the horizontal-extending and cephalic par of Boulez
The pole of contact is formed with, 3 groups of described poles with electrical equipment and two power supplys respectively to connect.Exist simultaneously
The executing agency the pole of the corresponding pole of electric equipment and two power supplys to be selected to a connection is provided with handcart,
Such as breaker.
Preferably, 3 groups of described poles are included positioned at middle to be set by corresponding binding post and electricity consumption
The outlet pole of standby connection, and two of the described outlet pole left and right sides of separation pass through binding post and two power supplys respectively
The inlet wire pole of connection.In electrical equipment indirectly, be easy to arrange and effectively control insulation distance, reduce width.
A kind of integrated double-power switching switch of use side wiring pole arrangement of the utility model is using three groups of sealing poles
Post coordinates set of execution mechanism, and executing agency is mechanical operating mechanism or permanent magnet mechanism etc., such as breaker, using side assembling structure,
With A, B, C three-phase of being arranged above and below the binding post of each circuit, such as set in top protruding-type is step-like, be easy to wiring and by upper
And the design of lower indent, interfering for each interpolar of circuit is reduced, meanwhile, the pole for placing side by side setting using three groups, often
One binding post of individual pole correspondence, breach needs the design of 12 binding posts in the past, by pole institute duty
Between compressed, greatly reduce switch cubicle volume.
Wherein, described executing agency and pole etc. are fixedly installed on handcart, in the walking rail of described handcart
Road both sides or end are provided with limiting section 40, the dual-power transfer switch using close to operator side after, using away from fore side as
Before, the trailing flank of described limiting section be formed with the inclined-plane that upper side edge is protruded forward, described handcart with it is described spacing
The docking section 50 of portion's matching, the leading flank of described docking section is corresponding with described inclined-plane domatic.That is limiting section and docking
Portion is formed with the mechanism plugged, constitutes related interference while effectively realizing and be accurately positioned on vertical plane, reduces vibrations
To the impact between pole and binding post.Meanwhile, supporting plate limiting section is joined directly together with wire with earth point, is met ground connection and is protected
Shield is required, it is ensured that processing safety.
Preferably, to ensure inclined-plane and the conductive reliability of domatic contact, cavity is formed with described inclined-plane, described
Cavity in be provided with conductive plate 42, described conductive plate back is provided with spring 41 to be held.Described conductive plate two
Guiding mechanism is provided between side and limiting section, such as links earhole and coordinates with pin.The conduct that can make that holds of contact spring is touched
The conductive plate of head can be protruded from and can also flushed outside inclined-plane with inclined-plane, and such normal condition lower inclined plane and domatic equal energy keep good
Conductive contact, when occurring vibrations, when tilting etc. unexpected, if gap etc. occur in limiting section and docking section, by the top of spring
Hold and remain to keep conducting between limiting section and docking section and the contact resistance with very little, can guarantee that effective grounding.
Second specific embodiment
The intensive dual-power transfer switch of side wiring of the present utility model include it is driven can vertical lifting supporting plate 2, can phase
The handcart 210 moved forward and backward to described supporting plate, the horizontal support plate 220 being fixedly connected with described handcart is fixedly installed vertically
3 groups of poles 230 on described horizontal support plate, every group of pole includes three be extends in the vertical direction respectively and time intervals
Three poles of Boulez, 3 groups of described poles are used to the inlet wire pole connected with electrical equipment and two power supplys respectively.
Wherein, 3 groups of described poles are included positioned at the middle outlet connected by binding post with electrical equipment
Pole, and two of the described outlet pole left and right sides of the separation inlet wire poles connected respectively by binding post with two power supplys
Post.Wherein, binding post, contact box and and both connector be preferably busbar integral type insulation contact box, it is L-type block
Shape structure, including it is provided with the horizontal part of 9 contact boxs corresponding with described pole and outside (front side) is provided with and connect
The vertical portion of line terminals, the contact box and the copper bar of binding post being provided with described insulation contact box described in connection, institute
The copper bar and contact box and binding post stated, which are poured, to be integrated to improve globality and insulating properties.Described binding post is arranged on
On the step facade of lateral surface, i.e. setting is protruded on the top of described vertical portion step by step.Described busbar integral type insulation contact
The supporting mechanism of box includes the column for being fixedly installed on insulation contact box bending part, is fixedly installed on behind insulation contact box rear end
Column, connection column and rear column side shield, be fixedly connected with described side shield to support described insulation contact
The bottom support bar of box horizontal part, and the bearing diagonal being fixedly connected with the vertical portion of described insulation contact box, described oblique branch
Support includes the side connecting plate being fixedly connected with the vertical portion of contact box, and two ends pass through spiral shell with described side connecting plate and column respectively
The oblique connecting rods that bolt is fixedly connected, described oblique connecting rods realize fixed connect with column connecting side using the cooperation of chute and bolt
Connect.
Using the L-shaped busbar integral type insulation contact box of front and rear extension, the end that top and each group pole are all answered will be arranged on
Son transits to rear portion by copper bar, can equally realize above-mentioned installation effect, moreover, being supported using bending part, horizontal part is by bottom branch
Stay, vertical portion by bearing diagonal, each point force it is uniform, reduce the deformation of contact box, and caused by avoiding cage support
Situations such as eddy-current heating, it is ensured that Electrical Safety.
Meanwhile, limiting section is also equipped between supporting plate and handcart, it is similar with the first specific embodiment, it is not reinflated herein
Description.
Compared to first embodiment, the elevating mechanism of second embodiment include being hinged on below supporting plate two are in splayed
The support arm 3 of Boulez, the bottom rail road 13 for being connected and being fixedly connected with support with described support arm lower end, and to by institute
The two support arm lower ends stated are locked from its separated retaining mechanism, and pass through the described supporting plate of screw-nut body direct drive
Lifting or the screw-nut body of the described support arm lower end folding of driving.The cooperation in support arm lower end and bottom rail road can use a variety of
Mode, the cooperation of such as embedded roller and groove, achievable support arm lower end moving along its axial direction relative to bottom rail road.It is preferred that
Ground, described support arm lower end is provided with the sliding block 31 with described bottom Orbit Matching to realize the relative bottom rail in described support arm lower end
Road is slidably matched, and such as bottom rail road is slide rail, and support arm lower end is hinged sliding block match with described slide rail, utilizes bottom rail road with propping up
The mating connection of arm lower end, when supporting plate is lifted, two support arm lower ends are moved relative to reverse sync, that is, are closed up or separated, when upper
Being raised to predetermined altitude can ensure that blade position does not change using retaining mechanism by lower end locking.
Wherein, when directly driving two support arm lower ends using screw-nut body, described leading screw is left-right turning screw rod,
The incorgruous action of synchronization of two support arm lower ends so can be both realized, and left-right turning screw rod has more preferable self-locking effect, improves
Bearing stability.
Executing agency, pole etc. are respectively arranged with lift supporting plate, upper space is taken full advantage of, reduced overall wide
Degree, and using moving up and down, the depth of cabinet is reduced, it can effectively meet the use that floor space is limited occasion.
As a preferred scheme, in addition to it is fixedly installed on the strip spine that on the sliding block and direction along ng a path extends
Tooth 14, the rotatable fixation of opposite brackets and spine corresponding with described ratchet refer to 32, and can drive described spine refer to it is synchronous to
The interior or outside control lever 33 overturn so that it is kept or disengaging is contacted with ratchet.Elevating mechanism is realized in the cooperation that spine refers to ratchet
Support arm, i.e. spine are pinned during rising in real time to refer to and one one-way locking mechanism of ratchet composition.The spine refers to ratch mechanism similar to ratchet
Ratchet, the ratchet that spine of the present utility model refers in the ratchet being equivalent in ratchet ratchet, the utility model is equivalent to ratchet ratchet
In straight line expansion after ratchet.
When the set location that spine refers to is lifting extreme higher position, centered on track middle part, the tooth of the outermost end of two ratchets
Just refer to holding engagement with spine, the torsion spring between ratchet and support ensures that both effectively contact laminating, realize firm support.While energy
Be effectively ensured so can realize that ratchet is outwards overturn when drive rod drives, and contact releasing is easy to decline, to realize that control lever is driven
Dynamic spine refers to synchronous outwards upset, and the spine described in two, which refers to, upper corresponding is provided with elongated slot, described control lever in upper and lower part
Linked by driving lever with described elongated slot, you can realize the rotation control that control lever refers to spine, meanwhile, between control lever and support
Guiding storehouse is additionally provided with, back-moving spring is provided between storehouse is oriented to, so ensures to reset rapidly.
Supporting plate of the present utility model is in lifting process, and ratchet is moved with the sliding block 31 of bottom Orbit Matching, is matched with ratchet
Spine refer to be rotatably fixed and be arranged on the side of bottom rail road 13 and keep interfering with ratchet, ratchet and spine, which refer to, realizes real-time self-locking,
Ensure the supporting role of the support arm 3 of splayed Boulez in lifting process.After supporting plate is giving rise to appropriate location, retaining mechanism is moved
Make and two support arms are locked from it separated, retaining mechanism, ratchet, spine refer to realization locking duplicate protection.It is in eight using two
The support arm of font Boulez is supported to supporting plate, the pressure of effectively slow lift drive mechanism, and support force by force and stably, ensures simultaneously
It will not be subjected to displacement, occur big short circuit current flow or for there is the occasion of vibrations to ensure that support absolute stability is reliable.
Wherein, it is the lifting of the supporting plate described in realization direct drive, the drive mechanism of described supporting plate 2 includes drive rod 4,
The variable-speed motor 5 being connected with described drive rod, such as worm and gear, the liter being connected with the output shaft of described variable-speed motor
Leading screw 6 is dropped, the driving beam 20 of the lifting nut matched with described elevating screw is provided with, and corresponding is arranged on
Drive the guiding mechanism between beam and support, described drive rod is driven by handwheel or motor, described drive rod can level set
Put or be vertically arranged, the stabilization of supporting plate is realized using drive rod combination variable-speed motor and with elevating screw and lifting nut
Rise, described guiding mechanism is the guide rail slide block mechanism being arranged between described driving beam and described support, using straight
Wire type guide rail provides high-precision be oriented to, it is ensured that traveling comfort.
Referred to using ratchet spine realize real-time lock while, described retaining mechanism is included along described bottom orbital direction
The swingle of extension, is arranged at least one pair of shaft-like or block tight lock part on described swingle, the described swingle of rotation
Locking or release of the tight lock part to support arm lower end can be achieved.Described swingle may be provided under the side or middle part in bottom rail road
Side, directly outwards winding swingle when supporting plate vertical direction is moved, when supporting plate runs to precalculated position, by swingle cycle, will
The lower end of two support arms is confined in the middle of two tight lock parts, that is, constitutes the spacing of stabilization, can effectively solve feed screw nut is having shake
When dynamic can not good self-locking situation.And by the setting of multipair tight lock part, then realization can be fixed on to any setting height position
Put, be easy to field maintenance or renewal part etc..
Described above is only preferred embodiment of the present utility model, it is noted that for the general of the art
For logical technical staff, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these change
Enter and retouch and also should be regarded as protection domain of the present utility model.
Claims (10)
- It is and described 1. a kind of intensive dual-power transfer switch of side wiring, it is characterised in that including the handcart that can be moved forward and backward The vertical support plate that handcart is fixedly connected, level is fixedly installed on 3 groups of poles on described vertical support plate, every group of sealing pole Post includes three between the upper and lower every three poles of Boulez, and 3 groups of described poles are used to and electrical equipment and two respectively Individual power supply connection.
- 2. the intensive dual-power transfer switch of side wiring as claimed in claim 1, it is characterised in that 3 groups of described sealing poles Post is included positioned at the middle outlet pole connect by corresponding binding post with electrical equipment, and going out described in living apart The inlet wire pole that two of the line pole left and right sides are connected by binding post with two power supplys respectively.
- 3. the intensive dual-power transfer switch of side wiring as claimed in claim 1, it is characterised in that in the row of described handcart Walk track front end or side and be provided with limiting section, the trailing flank of described limiting section is the inclined-plane that upper side edge is protruded forward, institute The docking section matched with described limiting section is formed with the handcart stated, the leading flank of described docking section is and described inclined-plane Corresponding domatic, described limiting section is joined directly together by wire with earth point.
- 4. a kind of intensive dual-power transfer switch of side wiring, it is characterised in that including can vertical lifting supporting plate, can be with respect to institute The handcart that the supporting plate stated is moved forward and backward, the horizontal support plate being fixedly connected with described handcart is fixedly installed on described water vertically 3 groups of poles on flat support plate, every group of pole includes three poles of three time interval Boulezs, described 3 Group pole with electrical equipment and two power supplys respectively to connect.
- 5. the intensive dual-power transfer switch of side wiring as claimed in claim 4, it is characterised in that 3 groups of described sealing poles Post is included positioned at the middle outlet pole connected by binding post with electrical equipment, and the outlet pole described in separation or so The inlet wire pole that two of both sides are connected by binding post with two power supplys respectively.
- 6. the intensive dual-power transfer switch of side wiring as claimed in claim 4, it is characterised in that before described supporting plate End or side are provided with limiting section, and the trailing flank of described limiting section is the inclined-plane that upper side edge is protruded forward, described handcart On be formed with the docking section matched with described limiting section, the leading flank of described docking section is slope corresponding with described inclined-plane Face, described limiting section is joined directly together by wire with earth point.
- 7. the intensive dual-power transfer switch of side wiring as claimed in claim 4, it is characterised in that the lifting of described supporting plate Mechanism include being hinged on two below supporting plate be in splayed Boulez support arm, be connected with described support arm lower end and with branch The bottom rail road that frame is fixedly connected, and lifted or the described branch of driving by the described supporting plate of screw-nut body direct drive The screw-nut body of arm lower end folding.
- 8. the intensive dual-power transfer switch of side wiring as claimed in claim 7, it is characterised in that also including to by described in Two support arm lower ends be locked from its separated retaining mechanism, described support arm lower end is provided with and described bottom Orbit Matching Sliding block is to realize described support arm lower end being slidably matched with respect to bottom rail road, and described retaining mechanism is described including being fixedly installed on The strip ratchet extended on sliding block and along bottom orbital direction, the rotatable fixation of opposite brackets and spine corresponding with described ratchet Refer to, and described spine can be driven to refer to synchronous outwardly or inwardly overturn so that it keeps or departed from the control lever contacted with ratchet.
- 9. the intensive dual-power transfer switch of side wiring as claimed in claim 8, it is characterised in that described retaining mechanism is also Including the swingle along described bottom orbital direction extension, at least one pair of tight lock part on described swingle, rotation are arranged on Described swingle can realize locking or release of the tight lock part to support arm lower end.
- 10. the intensive dual-power transfer switch of side wiring as claimed in claim 5, it is characterised in that described binding post For L-type busbar integral type insulation contact box, the supporting mechanism of insulation contact box includes being fixedly installed on insulation contact box bending part Column, be fixedly installed on the rear column of insulation contact box rear end, the side shield of connection column and rear column, with described side block The bottom support bar to support described insulation contact box horizontal part that plate is fixedly connected, and with described insulation contact box The bearing diagonal that vertical portion is fixedly connected, described bearing diagonal includes the side connecting plate being fixedly connected with the vertical portion of contact box, two Hold the oblique connecting rods being bolted to connection respectively with described side connecting plate and column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720297609.9U CN206602310U (en) | 2017-03-24 | 2017-03-24 | The intensive dual-power transfer switch of side wiring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720297609.9U CN206602310U (en) | 2017-03-24 | 2017-03-24 | The intensive dual-power transfer switch of side wiring |
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| Publication Number | Publication Date |
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| CN206602310U true CN206602310U (en) | 2017-10-31 |
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| CN201720297609.9U Active CN206602310U (en) | 2017-03-24 | 2017-03-24 | The intensive dual-power transfer switch of side wiring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968345A (en) * | 2017-03-24 | 2018-04-27 | 天津市先智电气设备有限公司 | Side wiring intensive style dual-power transfer switch |
-
2017
- 2017-03-24 CN CN201720297609.9U patent/CN206602310U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968345A (en) * | 2017-03-24 | 2018-04-27 | 天津市先智电气设备有限公司 | Side wiring intensive style dual-power transfer switch |
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