CN112563047A - Detachable change over switch - Google Patents
Detachable change over switch Download PDFInfo
- Publication number
- CN112563047A CN112563047A CN202011409665.XA CN202011409665A CN112563047A CN 112563047 A CN112563047 A CN 112563047A CN 202011409665 A CN202011409665 A CN 202011409665A CN 112563047 A CN112563047 A CN 112563047A
- Authority
- CN
- China
- Prior art keywords
- change
- over switch
- switch body
- jack
- contact pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims description 8
- 230000017525 heat dissipation Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 6
- 238000003780 insertion Methods 0.000 description 10
- 230000037431 insertion Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/58—Electric connections to or between contacts; Terminals
- H01H1/5866—Electric connections to or between contacts; Terminals characterised by the use of a plug and socket connector
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/58—Electric connections to or between contacts; Terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/58—Electric connections to or between contacts; Terminals
- H01H1/5866—Electric connections to or between contacts; Terminals characterised by the use of a plug and socket connector
- H01H2001/5872—Electric connections to or between contacts; Terminals characterised by the use of a plug and socket connector including means for preventing incorrect coupling
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
The invention relates to the technical field of change-over switches, and particularly discloses a detachable change-over switch which comprises a wire holder and a change-over switch body. Be provided with a plurality of binding post and a plurality of jack on the wire holder, binding post and jack one-to-one setting. The change-over switch body corresponds a plurality of jacks and is provided with a plurality of contact pins, and every two contact pins of contact pin are a set of, and two contact pins of every group pass through connecting circuit to be connected, and every contact pin homoenergetic enough inserts the jack that corresponds to be connected with the binding post that this jack corresponds. When the change-over switch body is disassembled, the change-over switch body is pulled towards the direction far away from the wire holder, so that the change-over switch body drives the contact pin to be separated from the jack. When the change-over switch body is installed, the contact pin is inserted into the corresponding jack again, and the contact pin is connected to the connecting terminal corresponding to the jack. The jacks correspond to the contact pins one to one, the risk of misconnection can be avoided, and the working efficiency is improved. The replacement is carried out through plugging operation, so that the whole replacement process is rapid, safe and reliable.
Description
Technical Field
The invention relates to the technical field of change-over switches, in particular to a detachable change-over switch.
Background
The change-over switch is a low-voltage switch for switching multiple loops, and is widely applied to secondary loops of transformer substations. The transfer switch is provided with a plurality of normally closed contacts and normally open contacts, some normally open contacts can be switched on by switching gears, and other normally closed contacts are switched off, so that switching among multiple loops is realized. The operating frequency of change-over switch is higher, appears easily rotating the jam, and the switch contact scheduling problem needs often to change. However, the existing transfer switches are all of an integrated structure, once a fault occurs, the entire transfer switch needs to be replaced, an external lead needs to be disconnected, the replacement process is complex, and risks of wrong wiring, direct current grounding, short circuit, mistaken touch of electrified equipment, personal electric shock and even mistaken operation of a switch can be caused.
Disclosure of Invention
The invention aims to provide a detachable change-over switch, which solves the problems of complex process, long time consumption and high risk of the existing change-over switch.
In order to achieve the purpose, the invention adopts the following technical scheme:
a detachable transfer switch, comprising:
the wiring seat is provided with a plurality of wiring terminals and a plurality of jacks, and the wiring terminals and the jacks are arranged in a one-to-one correspondence manner;
the change-over switch body corresponds a plurality of jack on it and is provided with a plurality of contact pins, every two of contact pins are a set of, and every two of group the contact pin passes through connecting circuit to be connected, every the contact pin all can insert the correspondence the jack to with this jack corresponds binding post is connected.
Further, the wire holder is provided with an inner cavity, and when the contact pin is connected to the corresponding wiring terminal, the change-over switch body is accommodated in the inner cavity.
Further, the wire holder is provided with the guide bar, the change over switch body is provided with the guiding hole, the guide bar with the guiding hole slip grafting.
Further, the wire holder is U type structure, U type structure includes first portion and two second portions, two the second portion is located respectively the both ends of first portion, be provided with in the first portion binding post with the jack, work as the contact pin is connected in corresponding during binding post, the change over switch body support in two between the second portion.
Furthermore, one of the second part and the change-over switch body is provided with a sliding block, the other one is provided with a guide rail along the length direction of the second part, and the sliding block is connected with the guide rail in a sliding manner.
Furthermore, the detachable change-over switch further comprises a limiting part, and when the contact pin is connected to the corresponding connecting terminal, the limiting part penetrates through the second part and is connected to the change-over switch body.
Further, the limiting part is provided with a plurality of edges.
Further, the limiting part is a bolt or a limiting block.
Further, a sealing structure is arranged between the change-over switch body and the jack.
Further, the wire holder is provided with a heat dissipation hole.
The invention has the beneficial effects that: the invention provides a detachable change-over switch which comprises a wire holder and a change-over switch body. The wire holder is detachably connected with the change-over switch body. The wire holder is provided with a plurality of wiring terminals, and the external lead is connected to the wiring terminals. When the detachable change-over switch is damaged and needs to be replaced, the connection between the wiring terminal and the external lead is kept, and only the change-over switch body is replaced. When the change-over switch body is disassembled, the change-over switch body is pulled towards the direction far away from the wire holder, so that the change-over switch body drives the contact pin to be separated from the jack. When the change-over switch body is installed, the contact pin is inserted into the corresponding jack again, and the contact pin is connected to the connecting terminal corresponding to the jack. The jacks correspond to the contact pins one to one, the risk of misconnection can be avoided, and the working efficiency is improved. The replacement is carried out through plugging operation, so that the whole replacement process is rapid, safe and reliable.
Drawings
Fig. 1 is a schematic diagram of a wire holder according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a transfer switch body according to a first embodiment of the invention;
fig. 3 is a schematic structural diagram of a detachable transfer switch according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a wire holder according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a transfer switch body according to a second embodiment of the present invention.
In the figure:
1. a wire holder; 11. a wiring terminal, 12 and a jack; 13. a first part; 14. a second section; 141. a guide rail; 15. a sealing groove; 16. heat dissipation holes; 17. an inner cavity; 18. a guide bar;
2. a transfer switch body; 21. inserting a pin; 22. a connection circuit; 23. converting the handle; 24. a slider; 25. a guide hole;
3. and a limiting member.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
Example one
The present embodiment provides a detachable transfer switch, as shown in fig. 1, fig. 2 and fig. 3, the detachable transfer switch includes a wire holder 1 and a transfer switch body 2. The wire holder 1 is provided with a plurality of wiring terminals 11 and a plurality of jacks 12, and the wiring terminals 11 and the jacks 12 are arranged in a one-to-one correspondence manner. The change-over switch body 2 is provided with a plurality of contact pins 21 corresponding to a plurality of jacks 12, every two contact pins 21 are in one group, two contact pins 21 of each group are connected through a connecting circuit 22, each contact pin 21 can be inserted into the corresponding jack 12, and is connected with the connecting terminal 11 corresponding to the jack 12.
The existing change-over switches are all of an integrated structure, and once a fault occurs, the change-over switches must be integrally replaced, external leads are disconnected, the risks of mis-wiring, direct-current grounding, short circuit, mis-touch of electrified equipment, personal electric shock and even mis-operation of the switch can be caused, the whole replacement process is complex in flow, long in time consumption and high in risk. The present embodiment provides a detachable transfer switch, which includes a wire holder 1 and a transfer switch body 2. The wire holder 1 is detachably connected with the change-over switch body 2. The wire holder 1 is provided with a plurality of wire connection terminals 11, and external wires are connected to the wire connection terminals 11. When the detachable change-over switch is damaged and needs to be replaced, the connection between the wiring terminal 11 and the external lead is maintained, and only the change-over switch body 2 needs to be replaced.
Specifically, one end of the external wire is connected to one of the connection terminals 11, and the other end is connected to the other connection terminal 11, and one external wire is installed for every two connection terminals 11. The wire holder 1 is provided with a plurality of jacks 12 corresponding to a plurality of wiring terminals 11, a plurality of pins 21 arranged on the change-over switch body 2 can be inserted into the plurality of jacks 12 to be connected to the corresponding wiring terminals 11, every two pins 21 are in one group, and two pins 21 in each group are connected through a connecting circuit 22, so that each external lead can be connected to a connecting circuit 22 through connection with two wiring terminals 11 to form a loop. When the number of the connection terminals 11 is equal to or greater than three, the wire holder 1 can mount a plurality of external wires. The operator can switch between the multiple loops by disconnecting some of the connecting circuits 22 while making other connecting circuits 22 conductive. In actual operation, the connection circuit 22 is frequently opened and closed, is easily damaged, and needs to be replaced frequently. The change-over switch body 2 is detachably connected with the wire holder 1, the connection between the wire holder 1 and an external wire can be kept during replacement, and only the change-over switch body 2 is replaced.
When the change-over switch body 2 needs to be detached, the change-over switch body 2 is pulled in the direction away from the wire holder 1, so that the change-over switch body 2 drives the contact pin 21 to be disengaged from the jack 12. When the change-over switch body 2 needs to be installed, the pins 21 are inserted into the corresponding jacks 12 again, and the pins 21 are connected to the corresponding terminals 11 of the jacks 12. The jacks 12 correspond to the pins 21 one by one, so that the risk of misconnection can be avoided, and the working efficiency is improved. The replacement is carried out through plugging operation, so that the whole replacement process is rapid, safe and reliable. In addition, in the present embodiment, the change-over switch body 2 is provided with the change-over handle 23, and the worker can control the on/off of the connection circuit 22 by operating the change-over handle 23.
Further, as shown in fig. 1, 2 and 3, the wire holder 1 is a U-shaped structure, the U-shaped structure includes a first portion 13 and two second portions 14, the two second portions 14 are respectively disposed at two ends of the first portion 13, the first portion 13 is provided with a connection terminal 11 and an insertion hole 12, and when the contact pin 21 is connected to the corresponding connection terminal 11, the transfer switch body 2 is supported between the two second portions 14. In this embodiment, the material of the switch body 2 and the wire holder 1 are both plastic. The wire holder 1 is U type structure, and when contact pin 21 connected in the binding post 11 that corresponds, the change over switch body 2 can be protected to U type structure, avoids the staff mistake to bump change over switch body 2. The U type structure can also support change over switch body 2, makes change over switch body 2 and connection terminal 1 firm connection to improve the reliability that contact pin 21 and binding post 11 are connected, make contact pin 21 be difficult for receiving external disturbance and deviate from in jack 12. In addition, when the worker inserts the pin 21 into the insertion hole 12, the wire holder 1 needs to be inserted into the U-shaped structure first. At this time, the two second portions 14 can limit the moving direction of the switch body 2, so that the insertion of the pin 21 into the insertion hole 12 is faster and more reliable.
As shown in fig. 1, 2 and 3, in the present embodiment, the slider 24 is provided to the switch body 2, and the guide rail 141 is provided to the second portion 14. Of course, in other embodiments, the slider 24 may be provided to the second portion 14, and the guide rail 141 may be provided to the switch body 2. When a worker inserts the inserting pin 21 into the inserting hole 12, the guide rail 141 and the sliding block 24 can be matched with each other to guide the moving direction of the change-over switch body 2, so that the inserting operation is faster and more reliable. In addition, when the contact pin 21 is connected to the corresponding connection terminal 11, the guide rail 141 and the slider 24 can make the connection between the connection base 1 and the transfer switch body 2 more stable, thereby further improving the reliability of the connection between the contact pin 21 and the connection terminal 11.
Further, as shown in fig. 3, the detachable transfer switch further includes a limiting member 3, and when the contact pin 21 is connected to the corresponding connection terminal 11, the limiting member 3 passes through the second portion 14 and is connected to the transfer switch body 2. So set up, can prevent change over switch body 2 from the roll-off in the wire holder 1 when contact pin 21 connects in corresponding binding post 11, be favorable to improving the reliability that contact pin 21 and binding post 11 are connected. Specifically, in the present embodiment, the limiting member 3 is provided in plurality. The stoppers 3 are provided at intervals along the longitudinal direction of the second portion 14. In addition, in the present embodiment, the stopper 3 is a bolt. The bolt is arranged on one side of the second part 14 and the change-over switch body 2 close to the second part 14 in a penetrating mode. Of course, in other embodiments, the limiting member 3 may be a limiting post, and the limiting post is disposed through the transfer switch body 2 and the two second portions 14.
Further, as shown in fig. 1 and 3, a seal structure is provided between the switch body 2 and the insertion hole 12. Specifically, in the present embodiment, the sealing structure is a sealing ring. With the arrangement, external water, dust and the like can be prevented from entering the jack 12, the reliability of connection between the contact pin 21 and the wiring terminal 11 can be improved, and the use safety of the detachable change-over switch can also be improved. Specifically, in the present embodiment, the wire holder 1 is provided with a plurality of seal grooves 15, and the plurality of seal grooves 15 respectively surround the outer peripheries of the plurality of insertion holes 12. A sealing ring is arranged in each sealing groove 15. When the plug 21 is connected to the connecting terminal 11, the switch body 2 is pressed against the sealing ring.
Further, as shown in fig. 1, 2 and 3, the wire holder 1 is provided with a heat dissipation hole 16. When the contact area between the contact pin 21 and the terminal 11 is too small, the joint between the contact pin 21 and the terminal 11 has a large contact resistance, and a large amount of heat is generated by long-time current transmission. The wire holder 1 is provided with heat dissipation holes 16, which are beneficial to heat dissipation. Specifically, in the present embodiment, the wire holder 1 is provided with a plurality of heat dissipation holes 16.
Example two
The detachable transfer switch provided in this embodiment is substantially the same as the detachable transfer switch provided in the first embodiment, as shown in fig. 4 and fig. 5, the main difference between the detachable transfer switch and the detachable transfer switch in the first embodiment is: the terminal base 1 has an inner cavity 17, and the switch body 2 is accommodated in the inner cavity 17 when the contact pins 21 are connected to the corresponding connection terminals 11. Inner chamber 17 has better protection and supporting effect to change over switch body 2, can prevent that the staff from missing to bump change over switch body 2, also can make change over switch body 2 and connection terminal 1 be connected firmly to improve the reliability that contact pin 21 and binding post 11 are connected. In addition, when the worker inserts the pin 21 into the insertion hole 12, the wire holder 1 needs to be inserted into the cavity 17 first. At this time, the inner cavity 17 can limit the moving direction of the switch body 2, so that the insertion of the insertion pin 21 into the insertion hole 12 is faster and more reliable.
In addition, in the present embodiment, the wire holder 1 is provided with the guide bar 18, the switch body 2 is provided with the guide hole 25, and the guide bar 18 is slidably inserted into the guide hole 25. When the worker inserts the inserting pin 21 into the guide hole 25, the guide rod 18 and the guide hole 25 can be matched to guide the moving direction of the change-over switch body 2, and further guide the moving direction of the inserting pin 21, so that the inserting operation is faster and more reliable. In the present embodiment, the cross section of the guide bar 18 is rectangular, and when the guide bar 18 is inserted into the guide hole 25, the guide bar 18 inserted into the guide hole 25 can cooperate to restrict the rotation of the transfer switch body 2. Of course, in other embodiments, the cross-section of the guide bar 18 may be oval, quincunx, or other shapes.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A detachable transfer switch, comprising:
the wire holder (1) is provided with a plurality of wiring terminals (11) and a plurality of jacks (12), and the wiring terminals (11) and the jacks (12) are arranged in a one-to-one correspondence manner;
the change-over switch body (2) corresponds a plurality of jack (12) on it and is provided with a plurality of contact pins (21), every two of contact pin (21) are a set of, and every two of every group contact pin (21) are connected through connecting circuit (22), every contact pin (21) all can insert the correspondence jack (12) to with this jack (12) correspond binding post (11) are connected.
2. The removable transfer switch of claim 1, wherein: the wire holder (1) is provided with an inner cavity (17), and when the contact pin (21) is connected to the corresponding wire connecting terminal (11), the change-over switch body (2) is accommodated in the inner cavity (17).
3. The removable transfer switch of claim 1, wherein: the wiring holder (1) is provided with guide rod (18), change over switch body (2) is provided with guiding hole (25), guide rod (18) with guiding hole (25) slip grafting.
4. The removable transfer switch of claim 1, wherein: wire holder (1) is U type structure, U type structure includes first portion (13) and two second portion (14), two second portion (14) set up respectively in the both ends of first portion (13), be provided with on first portion (13) binding post (11) with jack (12), work as contact pin (21) connect in corresponding during binding post (11), change over switch body (2) support in two between second portion (14).
5. The removable transfer switch of claim 4, wherein: one of the second part (14) and the change-over switch body (2) is provided with a sliding block (24), the other one is provided with a guide rail (141) along the length direction of the second part (14), and the sliding block (24) is connected with the guide rail (141) in a sliding mode.
6. The removable transfer switch of claim 4, wherein: the detachable change-over switch further comprises a limiting piece (3), and when the contact pin (21) is connected to the corresponding wiring terminal (11), the limiting piece (3) penetrates through the second portion (14) and is connected to the change-over switch body (2).
7. The removable transfer switch of claim 6, wherein: the limiting parts (3) are provided in a plurality.
8. The removable transfer switch of claim 6, wherein: the limiting piece (3) is a bolt (31) or a limiting column (32).
9. The removable transfer switch of claim 1, wherein: and a sealing structure is arranged between the change-over switch body (2) and the jack (12).
10. The removable transfer switch of claim 1, wherein: the wire holder (1) is provided with a heat dissipation hole (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011409665.XA CN112563047A (en) | 2020-12-04 | 2020-12-04 | Detachable change over switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011409665.XA CN112563047A (en) | 2020-12-04 | 2020-12-04 | Detachable change over switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112563047A true CN112563047A (en) | 2021-03-26 |
Family
ID=75048567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011409665.XA Pending CN112563047A (en) | 2020-12-04 | 2020-12-04 | Detachable change over switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112563047A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113437601A (en) * | 2021-06-11 | 2021-09-24 | 国网湖北省电力有限公司孝感供电公司 | But quick replacement's omnipotent change over switch |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3817002A1 (en) * | 1988-05-19 | 1989-11-30 | Kloeckner Moeller Elektrizit | ELECTROMAGNETIC SWITCHGEAR |
| DE19645332C1 (en) * | 1996-11-04 | 1998-02-12 | Kloeckner Moeller Gmbh | Connector device for LV electromagnetic switchgear or limit probe |
| CN204315397U (en) * | 2014-12-26 | 2015-05-06 | 江苏优品电气有限公司 | A kind of appendicle termination of control and protective switch |
| CN207283031U (en) * | 2017-11-03 | 2018-04-27 | 广东求精电气有限公司 | A kind of pull-out type dual power supply |
| CN209544171U (en) * | 2019-03-18 | 2019-10-25 | 深圳市泰永电气科技有限公司 | Bypass multiplexor electric appliance and its termination |
-
2020
- 2020-12-04 CN CN202011409665.XA patent/CN112563047A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3817002A1 (en) * | 1988-05-19 | 1989-11-30 | Kloeckner Moeller Elektrizit | ELECTROMAGNETIC SWITCHGEAR |
| DE19645332C1 (en) * | 1996-11-04 | 1998-02-12 | Kloeckner Moeller Gmbh | Connector device for LV electromagnetic switchgear or limit probe |
| CN204315397U (en) * | 2014-12-26 | 2015-05-06 | 江苏优品电气有限公司 | A kind of appendicle termination of control and protective switch |
| CN207283031U (en) * | 2017-11-03 | 2018-04-27 | 广东求精电气有限公司 | A kind of pull-out type dual power supply |
| CN209544171U (en) * | 2019-03-18 | 2019-10-25 | 深圳市泰永电气科技有限公司 | Bypass multiplexor electric appliance and its termination |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113437601A (en) * | 2021-06-11 | 2021-09-24 | 国网湖北省电力有限公司孝感供电公司 | But quick replacement's omnipotent change over switch |
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Application publication date: 20210326 |