CN104681320B - One kind improvement two-period form double power supply automatic transfer switch - Google Patents
One kind improvement two-period form double power supply automatic transfer switch Download PDFInfo
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- CN104681320B CN104681320B CN201310636859.7A CN201310636859A CN104681320B CN 104681320 B CN104681320 B CN 104681320B CN 201310636859 A CN201310636859 A CN 201310636859A CN 104681320 B CN104681320 B CN 104681320B
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- power supply
- contact group
- transfer switch
- microswitch
- manual
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/28—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Keying Circuit Devices (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
One kind improvement two-period form double power supply automatic transfer switch, including：Conventional power supply wiring unit, stand-by power supply wiring units, converting unit and base unit, the converting unit include moving contact group, the electromagnetic conversion mechanism moved for moving contact group described in motorized motions to the first static contact group or the second static contact group and the manual-operating mechanism moved for moving contact group described in manual actuation to the first static contact group or the second static contact group；Base unit is used to carry conventional power supply wiring unit, stand-by power supply wiring units, electromagnetic conversion mechanism and the manual-operating mechanism.A kind of improvement two-period form double power supply automatic transfer switch disclosed by the invention, using reliable electromagnetic operating mechanism and easy manual-operating mechanism, improve in the past larger using the volume of PC level dual-power transfer switch, the cumbersome secondary connection problem of control circuit, significantly save installing space, effectively reduce cost price, there is very high practical value.
Description
Technical field
The present invention relates to a kind of dual-power transfer switch, and in particular to a kind of improvement two-period form suitable for small cage electric current
Double power supply automatic transfer switch.
Background technology
Existing PC levels dual-power transfer switch, due to bulky, can take larger when suitable for small cage electric current
Installing space, can also cause function waste.Simultaneously when manually operated, generally require to be operated manually by means of instrument,
Can not quickly it switch over；Generally requiring secondary connection for control power supply wiring part could complete.Therefore, one kind is applied to
The improvement two-period form double power supply automatic transfer switch of small cage electric current arises at the historic moment.
The content of the invention
In order to solve the above technical problems, it is an object of the invention to provide one kind to have reliable electromagnetism manual-operating mechanism
With the improvement two-period form double power supply automatic transfer switch of easy manual manual-operating mechanism.
To reach above-mentioned purpose, technical scheme is as follows：One kind improvement two-period form double power supply automatic transfer switch,
Including：
Conventional power supply wiring unit, including commonly use supply terminals subgroup and be connected to the conventional supply terminals subgroup
The first static contact group；
Stand-by power supply wiring units, including stand-by power supply terminals subgroup and it is connected to the stand-by power supply terminals subgroup
The second static contact group；
Converting unit, including moving contact group, for moving contact group described in motorized motions to the first static contact group or
The electromagnetic conversion mechanism of two static contact groups motion and for moving contact group described in manual actuation to the first static contact group or
The manual-operating mechanism of second static contact group motion；
Base unit, for carrying the conventional supply terminals subgroup, the first static contact group, stand-by power supply binding post
Group, the second static contact group, moving contact group, electromagnetic conversion mechanism and manual-operating mechanism.
Preferably, the electromagnetic conversion mechanism includes：
Central rotating shaft, the moving contact group that is connected and be provided with the manual-operating mechanism linkage driving lever；
Contiguous block, is provided with the first groove, and the driving lever is arranged in first groove and with the contiguous block
Movement is swung in first groove；
First electromagnetic coil, the corresponding conventional supply terminals subgroup are set and with the first static iron core of fixed setting
With the first dynamic iron core for sliding setting, the first dynamic iron core clamping connects the side of the contiguous block；
Second electromagnetic coil, the corresponding stand-by power supply terminals subgroup set and with the second static iron cores of fixed setting
With the second dynamic iron core for sliding setting, the second dynamic iron core clamping connects the opposite side of the contiguous block.
Preferably, the electromagnetic conversion mechanism also include the first microswitch for being electrically connected with first magnet coil and
The second microswitch electrically connected with second magnet coil, first microswitch are symmetrical arranged with the second microswitch
In the both sides of the central rotating shaft, first microswitch is provided with the first movable contact, and second microswitch is provided with second
Movable contact, first movable contact contact connection with the central rotating shaft respectively with the second movable contact, for automatically switching in place
When cut off the control power supply of first magnet coil or the second magnet coil.
Preferably, elastic link gear is additionally provided with the central rotating shaft, the elastic link gear includes one end and institute
State central rotating shaft connection, the connecting rod that the other end is connected with the pedestal and the elastic component being sheathed on the connecting rod, the elasticity
Link gear is symmetricly set in the both sides of the central rotating shaft.
Preferably, the electromagnetic conversion mechanism also includes the first circuit control part, for controlling the improvement two-period form
The automatic switchover of the conventional power supply or stand-by power supply of double power supply automatic transfer switch, the first control circuit part are included successively
Control power supply wiring socket, first line plate and the electromagnetic relay of electrical connection, the electromagnetic relay are electrically connected described
First microswitch and the second microswitch.
Preferably, the manual-operating mechanism includes the mask that covers in the electromagnetic conversion mechanism, the mask with
The pedestal clamping；The mask is provided with the rotary handle for manually operated Switching power, and the pedestal corresponds to the rotation
Change hands handle and be provided with steady pin；The rotary handle includes the shifting block for being located at the mask exterior and the hand for being arranged in the mask
Handle connecting rod, one end of the handle and connecting rod are fixedly connected with the shifting block, the other end be sheathed on the steady pin and with it is described solid
Rationed marketing is rotatablely connected；Be additionally provided with the handle and connecting rod with the driving lever drive connection connecting portion, for it is manually operated when drive
The driving lever is moved to swing back and forth.
Preferably, the connecting portion is provided with the second groove, and the free end of the driving lever is also arranged in second groove.
Preferably, the manual-operating mechanism also includes second circuit control section, for controlling the improvement two-period form
Double power supply automatic transfer switch manually operated is automatically brought into operation switching, and the circuit control part includes the second wiring board and cunning
Dynamic switch, the slide switch are located on the mask and electrically connect second wiring board.
Beneficial effect using above technical scheme is：Two groups of power supplys use separate electromagnetic system, in input
It is relatively reliable；Moving contact is that load end, static contact are conventional power end and standby electricity source, make overall structure more flexibly, can
Lean on；Tool operation need not be borrowed during manual switching, can quickly realize switching manually；Control power supply is directly inserted using binding post
Enter, eliminate the complicated of secondary connection, simultaneously because the overall volume of switch reduces, excessive installing space will not be taken, solve
The double power supply automatic transfer switch conversion speed for having determined traditional is slow, it is expensive the problems such as, there is very high practical value.
Brief description of the drawings
Technical scheme in technology in order to illustrate the embodiments of the present invention more clearly, in being described below to embodiment technology
The required accompanying drawing used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present invention
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is a kind of structural representation for improveing two-period form double power supply automatic transfer switch of the present invention；
Fig. 2 is a kind of electromagnetic conversion mechanism and manual operation machine for improveing two-period form double power supply automatic transfer switch of the present invention
The structural representation of structure；
Fig. 3 is a kind of structural representation for the rotary handle for improveing two-period form double power supply automatic transfer switch of the present invention；
Corresponding component title in figure represented by numeral：
1st, supply terminals subgroup 2, stand-by power supply terminals subgroup 3, mask 4, rotary handle 41, shifting block are commonly used
5th, power supply wiring socket 6, slide switch 7, arc extinguishing cover plate 8, load wiring terminal group 9, central rotating shaft 10, first are controlled
Microswitch 11, contiguous block 12, the first magnet coil 13, driving lever 14, handle and connecting rod 15, the second magnet coil 16, second
Microswitch 17, first line plate 18, the electromagnetic relay 20 of the second wiring board 19, the second static contact group 21, moving contact group
22nd, the first static contact group 23, pedestal 24, the first dynamic iron core 25, the second dynamic iron core 26, connecting portion 261, the second groove.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
As shown in figure 1, a kind of improvement two-period form double power supply automatic transfer switch, including it is conventional power supply wiring unit, standby
Power supply wiring unit, converting unit and base unit, commonly using power supply wiring unit includes conventional supply terminals subgroup 1 and connection
In the first static contact group 22 of the conventional supply terminals subgroup 1；Stand-by power supply wiring units include stand-by power supply terminals
Subgroup 2 and the second static contact group 20 for being connected to the stand-by power supply terminals subgroup 2；Converting unit include moving contact group 21,
The electromagnetic conversion moved for moving contact group 21 described in motorized motions to the first static contact group 22 or the second static contact group 20
Mechanism and moved to the first static contact group 22 or the second static contact group 20 for moving contact group 21 described in manual actuation
Manual-operating mechanism；Base unit includes pedestal 23, for carrying the conventional supply terminals subgroup 1, the first static contact group
22nd, stand-by power supply terminals subgroup 2, the second static contact group 20, moving contact group 21, electromagnetic conversion mechanism and manual operation machine
Structure.
Electromagnetic conversion mechanism includes the first magnet coil 12, the second magnet coil 15, the contiguous block 11 being arranged on pedestal
With central rotating shaft 9, the first magnet coil 12 and the second magnet coil 15 correspond to conventional supply terminals subgroup 1 and standby electricity respectively
Source terminals subgroup 2 is symmetricly set in the both sides of contiguous block 11；First magnet coil 12 includes being fixedly installed on the first electromagnetic wire
The first static iron core (not marked in figure) enclosed in 12 and the first dynamic iron core 24 being slideably positioned in the first magnet coil 12, second
Magnet coil 15 includes the second static iron core (not marked in figure) being fixedly installed in the second magnet coil 15 and is slideably positioned in
The second dynamic iron core 25 in second magnet coil 15, the first dynamic iron core of side clamping 24 of contiguous block 11, opposite side clamping second
Dynamic iron core 35, contiguous block 11 are slidably connected to the first magnet coil 12 and second by the first dynamic iron core 24 and the second dynamic iron core 25
Magnet coil 15；The drive connection moving contact of central rotating shaft 9 group 21, central rotating shaft 9 is provided with the driving lever that one end is fixed with central rotating shaft 9
13, contiguous block 11 is provided with the first groove（Do not marked in figure）, the free end of driving lever 13 be arranged in the first groove and with it is manually operated
Mechanism connects, and contiguous block 11 drives central rotating shaft 9 to rotate during for automatically switching.
Electromagnetic conversion mechanism also include the first microswitch 10 for being electrically connected with the first magnet coil 12 and with the second electromagnetism
The second microswitch 16 that coil 15 electrically connects, the first microswitch 10 and the second microswitch 16 are symmetricly set in central rotating shaft
9 both sides, the first microswitch 10 are provided with the first movable contact（Do not marked in figure）, the second microswitch 16 is provided with the second movable contact
（Do not marked in figure）, the first movable contact contacts connection with central rotating shaft 9 respectively with the second movable contact, during for automatically switching in place
Cut off the control power supply of the first magnet coil 12 or the second magnet coil 15.
Elastic link gear is additionally provided with central rotating shaft 9, elastic link gear is connected, separately including one end with central rotating shaft 9
The connecting rod that one end is connected with pedestal 23（Do not marked in figure）With the elastic component being sheathed on connecting rod（Do not marked in figure）, elasticity linkage
Mechanism is symmetricly set in the both sides of central rotating shaft 9.
Electromagnetic conversion mechanism also includes the first circuit control part, for controlling improvement two-period form double power-supply automatic transferring to open
The automatic switchover of the conventional power supply or stand-by power supply that close, first control circuit part include the control power supply wiring being sequentially connected electrically
Socket, first line plate and electromagnetic relay, electromagnetic relay are electrically connected the first microswitch and the second microswitch
Manual-operating mechanism includes the mask 3 covered in electromagnetic conversion mechanism, mask 3 and the clamping of pedestal 23；On mask 3
Provided with the rotary handle 4 for manually operated Switching power, pedestal corresponding rotation handle 4 is provided with steady pin and (not marked in figure
Go out)；As shown in figure 3, rotary handle 4 includes the shifting block 41 and the handle and connecting rod 14 for being arranged in mask 3, handle located at mask exterior
One end of connecting rod 14 is fixedly connected with shifting block 41, and the other end is sheathed on steady pin and is rotatablely connected with steady pin；Handle and connecting rod 14
On be additionally provided with driving lever 13 be connected connecting portion 26, for it is manually operated when driving driving lever 13 swing back and forth.Connecting portion 26
Provided with the second groove 261, the free end of driving lever 13 is also arranged in the second groove 261.
Manual-operating mechanism also includes second circuit control section, for controlling improvement two-period form double power-supply automatic transferring to open
Close it is manually operated or be automatically brought into operation switching, circuit control part includes the second wiring board and slide switch, and slide switch is located at
On mask and electrically connect the second wiring board.
The operation principle for improveing two-period form double power supply automatic transfer switch is as follows：Conventional supply terminals subgroup and conventional electricity
Source is connected, and stand-by power supply terminals subgroup is connected with stand-by power supply, and load wiring terminal group is connected with electrical equipment, commonly uses power supply
Control power supply wiring socket is inserted with stand-by power supply binding post.When improveing the energization of two-period form double power supply automatic transfer switch,
First line plate meeting prioritizing selection is often powered with power supply, and electromagnetic relay connects the first magnet coil, and the first magnet coil is powered
When produce electromagnetic force, its first internal static iron core and the first dynamic iron core adhesive, the first dynamic iron core drive contiguous block electric to first
Magnetic coil is close, and the driving lever for being now arranged in contiguous block drives central rotating shaft to be rotated a certain angle to the first magnet coil, by
Be connected in central rotating shaft and moving contact group, moving contact group be also driven it is close to the first static contact group, until contact, now
Conventional power supply and electrical equipment circuit turn-on；Central rotating shaft is rotated in place simultaneously, encounters the first movable contact of the first microswitch,
First movable contact moves inward, and cuts off the conductive track of electromagnetic relay, the power-off of the first magnet coil, ensures moving contact group and the
One static contact group is reliably connected, and due to also being provided with elastic link gear on central rotating shaft, rotating shaft also can in the presence of elastic component
Ensure that moving contact group is reliably connected with the first static contact group.
When conventional power supply goes wrong, first circuit board can select stand-by power supply to power, and now electromagnetic relay can be connected
Second magnet coil, finally moving contact group is controlled to be connect in the second static contact group with the second dynamic iron core adhesive by the second static iron core
Touch, realize it is standby powered with power supply, switched back after waiting conventional power up normal, realizing fully automated switching.
When needing manual switching, slide switch is stirred, now the second wiring board cut-out electromagnetic relay power supply, to conventional
Power supply terminal prescription drives handle and connecting rod to rotate to the rotary handle stirred on mask, rotary handle, on handle and connecting rod
Second groove drives driving lever to be swung to the first magnet coil, drives central rotating shaft to be revolved to the first magnet coil while driving lever is swung
Turn certain angle, because central rotating shaft and moving contact group are connected, moving contact group is also driven to the first static contact group and leaned on
Closely, until contact, now realizes the conventional power supply of control manually and electrical equipment circuit turn-on, switch to standby electricity if desired
Source, then to stand-by power supply binding post prescription to the rotary handle stirred on mask, it can equally realize manual switching standby electricity
Source and electrical equipment circuit turn-on.
Beneficial effect using above technical scheme is：Two groups of power supplys use separate electromagnetic system, in input
It is relatively reliable；Moving contact is that load end, static contact are conventional power end and standby electricity source, make overall structure more flexibly, can
Lean on；Tool operation need not be borrowed during manual switching, can quickly realize switching manually；Control power supply is directly inserted using binding post
Enter, eliminate the complicated of secondary connection, simultaneously because the overall volume of switch reduces, excessive installing space will not be taken, solve
The double power supply automatic transfer switch conversion speed for having determined traditional is slow, it is expensive the problems such as, there is very high practical value.
Further, handle and connecting rod is driven by rotational handle so that driving lever drives central rotating shaft to be rotated, more
Quickly, more effectively realize that manual switching is conventional, the purpose of stand-by power supply.
Further, its sound iron core is made to inhale and produce by the way that the first magnet coil and the second magnet coil are separately energized
Raw electromagnetic attraction, so as to produce pulling force to driving lever, drive central rotating shaft to be rotated, more rapidly, more effectively realize electronic cut
Change conventional, stand-by power supply purpose.
Further, the mutual cooperation of first line plate and slide switch, the second wiring board and electromagnetic relay is passed through
To realize, manually or automatically the accurate of pattern is switched fast.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (4)
1. one kind improvement two-period form double power supply automatic transfer switch, it is characterised in that including：
Conventional power supply wiring unit, including conventional supply terminals subgroup and it is connected to the of the conventional supply terminals subgroup
One static contact group；
Stand-by power supply wiring units, including stand-by power supply terminals subgroup and it is connected to the of the stand-by power supply terminals subgroup
Two static contact groups；
Converting unit, including it is moving contact group, quiet to the first static contact group or second for moving contact group described in motorized motions
The electromagnetic conversion mechanism of sets of contacts motion and for moving contact group described in manual actuation to the first static contact group or second
The manual-operating mechanism of static contact group motion；The electromagnetic conversion mechanism includes：
Central rotating shaft, the moving contact group that is connected and be provided with the manual-operating mechanism linkage driving lever；
Contiguous block, is provided with the first groove, and the driving lever is arranged in first groove and with the movement of the contiguous block
Swung in first groove；
First magnet coil, the corresponding conventional supply terminals subgroup set and the first static iron core with fixed setting and
The first dynamic iron core set is slided, the first dynamic iron core clamping connects the side of the contiguous block；
Second magnet coil, the corresponding stand-by power supply terminals subgroup set and the second static iron core with fixed setting and
The second dynamic iron core set is slided, the second dynamic iron core clamping connects the opposite side of the contiguous block；
Base unit, for carry the conventional supply terminals subgroup, the first static contact group, stand-by power supply terminals subgroup,
Second static contact group, moving contact group, electromagnetic conversion mechanism and manual-operating mechanism；
Elastic link gear is additionally provided with the central rotating shaft, the elastic link gear includes one end and connected with the central rotating shaft
Connect, the connecting rod that the other end is connected with the base unit and the elastic component being sheathed on the connecting rod, the elastic link gear
It is symmetricly set in the both sides of the central rotating shaft；
The manual-operating mechanism includes the mask covered in the electromagnetic conversion mechanism, the mask and the base unit
Clamping；The mask is provided with the rotary handle for manually operated Switching power, and the base unit corresponds to the rotation hand
Handle is provided with steady pin；The rotary handle includes with the handle for being arranged in the mask connecting located at the shifting block of the mask exterior
Bar, one end of the handle and connecting rod are fixedly connected with the shifting block, the other end be sheathed on the steady pin and with the steady pin
Rotation connection；Be additionally provided with the handle and connecting rod with the driving lever drive connection connecting portion, for it is manually operated when drive institute
State driving lever to swing back and forth, the connecting portion is provided with the second groove, and the free end of the driving lever is also arranged in second groove.
2. improvement two-period form double power supply automatic transfer switch according to claim 1, it is characterised in that the electromagnetic conversion
Mechanism also includes the first microswitch for being electrically connected with first magnet coil and electrically connected with second magnet coil
Second microswitch, first microswitch and the second microswitch are symmetricly set in the both sides of the central rotating shaft, described
First microswitch is provided with the first movable contact, and second microswitch is provided with the second movable contact, first movable contact and
Two movable contacts contact connection with the central rotating shaft respectively, cut off first magnet coil or the during for automatically switching in place
The control power supply of two magnet coils.
3. improvement two-period form double power supply automatic transfer switch according to claim 2, it is characterised in that the electromagnetic conversion
Mechanism also includes the first circuit control part, for controlling the conventional power supply of the improvement two-period form double power supply automatic transfer switch
Or the automatic switchover of stand-by power supply, control power supply wiring socket that first circuit control part includes being sequentially connected electrically, the
One wiring board and electromagnetic relay, the electromagnetic relay are electrically connected first microswitch and the second microswitch.
4. improvement two-period form double power supply automatic transfer switch according to claim 3, it is characterised in that described manually operated
Mechanism also includes second circuit control section, for controlling the manually operated of the improvement two-period form double power supply automatic transfer switch
Or switching is automatically brought into operation, the second circuit control section includes the second wiring board and slide switch, and the slide switch is located at
On the mask and electrically connect second wiring board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310636859.7A CN104681320B (en) | 2013-12-03 | 2013-12-03 | One kind improvement two-period form double power supply automatic transfer switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310636859.7A CN104681320B (en) | 2013-12-03 | 2013-12-03 | One kind improvement two-period form double power supply automatic transfer switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104681320A CN104681320A (en) | 2015-06-03 |
| CN104681320B true CN104681320B (en) | 2017-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310636859.7A Active CN104681320B (en) | 2013-12-03 | 2013-12-03 | One kind improvement two-period form double power supply automatic transfer switch |
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| CN (1) | CN104681320B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106717557B (en) * | 2016-12-15 | 2024-01-23 | 苏州金莱克精密机械有限公司 | Garden tool with dual battery pack driving function |
| CN107887206A (en) * | 2017-12-27 | 2018-04-06 | 黑龙江博瑞特高新技术开发有限公司 | Dual power supply switches operating mechanism and actuating method |
| CN114068205B (en) * | 2021-11-24 | 2023-08-29 | 深圳市龙星辰电源有限公司 | Switch system for controlling switching of double-medical-treatment power switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2353027Y (en) * | 1998-09-28 | 1999-12-08 | 江苏泰航电器有限公司 | Lockable type electromagnetic, automatic and double power supply switch |
| CN201741617U (en) * | 2010-08-12 | 2011-02-09 | 浙江西普电气有限公司 | Intelligent dual power change-over switch |
| CN203706925U (en) * | 2013-12-03 | 2014-07-09 | 苏州飞腾电器有限公司 | Improved two-stage double-power-supply automatic changeover switch |
-
2013
- 2013-12-03 CN CN201310636859.7A patent/CN104681320B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2353027Y (en) * | 1998-09-28 | 1999-12-08 | 江苏泰航电器有限公司 | Lockable type electromagnetic, automatic and double power supply switch |
| CN201741617U (en) * | 2010-08-12 | 2011-02-09 | 浙江西普电气有限公司 | Intelligent dual power change-over switch |
| CN203706925U (en) * | 2013-12-03 | 2014-07-09 | 苏州飞腾电器有限公司 | Improved two-stage double-power-supply automatic changeover switch |
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| Publication number | Publication date |
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| CN104681320A (en) | 2015-06-03 |
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