CN104992859A - Contact arc extinguishing system for dual-power supply automatic transfer switch - Google Patents
Contact arc extinguishing system for dual-power supply automatic transfer switch Download PDFInfo
- Publication number
- CN104992859A CN104992859A CN201510441191.XA CN201510441191A CN104992859A CN 104992859 A CN104992859 A CN 104992859A CN 201510441191 A CN201510441191 A CN 201510441191A CN 104992859 A CN104992859 A CN 104992859A
- Authority
- CN
- China
- Prior art keywords
- contact
- group
- moving contact
- arc
- moving
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/32—Insulating body insertable between contacts
-
- 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
- H01H1/64—Protective enclosures, baffle plates, or screens for contacts
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a contact arc extinguishing system for a dual-power supply automatic transfer switch, which comprises two rotation shafts controlled by a dual-power supply action mechanism, a first moving contact group and a second moving contact group arranged on the rotation shafts, a first static contact group arranged at the lower part of the first moving contact group, a second static contact group arranged at the lower part of the second moving contact group, an arc extinguishing cover arranged between the contact groups and a mounting box for accommodating the contact groups and the arc extinguishing cover. According to the dual-power supply automatic transfer switch, moving contacts and static contacts of the first contact group and the second contact group are arranged on different working surfaces, the special Z-shaped arc extinguishing cover is arranged between the contact groups, each arc extinguishing chamber can be used when action contacts of a common power supply and a standby power supply in the dual power supply break load current, a long arc extinguishing distance in a limited size can be obtained, and better arc extinguishing effects can be obtained.
Description
Technical field
The present invention relates to a kind of low-voltage electrical apparatus, particularly relate to a kind of contact arc-extinguishing system of double power supply automatic transfer switch.
Background technology
Double power supply automatic transfer switch is a kind of conventional low-voltage electrical apparatus, is usually used in the conversion between two road power supplys, and during to ensure when a road power failure or to stop power supply, another road power supply can switch rapidly, to guarantee load circuit normal power supply.The shift actuating member of PC level double power supply automatic transfer switch is generally change over switch, at conventional power supply, the moving contact of stand-by power supply, determine between contact, to be provided with an arc-extinguish chamber, because dual-power transfer switch disjunction should commonly use the switch current of power supply, the switch current of disjunction stand-by power supply again, and due to conventional power supply, the main contact action face of stand-by power supply is arranged in a plane, a dividing plate is set for this reason and at the middle part of arc-extinguish chamber and separates arc-extinguish chamber to be formed the use of two arc control device for the arc extinguishing of conventional power supply and stand-by power supply, make the arc extinguishing Distance Shortened of arc control device like this, arc quenching effect is poor.
Summary of the invention
The object of the invention is to the drawback overcoming traditional double power automatic transfer switch arc-control device, disclose the contact arc-extinguishing system of a kind of novel structure, arc quenching effect preferably double power supply automatic transfer switch.
In order to realize above object, the technical solution used in the present invention is: a kind of contact arc-extinguishing system of double power supply automatic transfer switch, comprise two rotating shafts controlled by duplicate supply actuating mechanism, be arranged on the first moving contact group on described rotating shaft and the second moving contact group, be arranged on the first stationary contact head group of described first moving contact group bottom, be arranged on the second stationary contact head group of described second moving contact group bottom, be arranged on described first moving contact group, first stationary contact head group and the second moving contact group, arc-extinguish chamber between second stationary contact head group and described first moving contact group is set, first stationary contact head group, second moving contact group, the mounting box of the second stationary contact head group and arc-extinguish chamber.
Further setting, the first described moving contact group is identical with the structure of the second moving contact group, comprise rotating shaft, rotating shaft axle sleeve, action link rod, link connector pin, spring capping, Compress Spring, moving contact, fulcrum bolt, dynamic some bolt, moving contact brace and being flexible coupling, described rotating shaft adapter sleeve is on the rotary shaft sheathed, described action link rod by link connector pin and rotating shaft axle sleeve hinged, described Compress Spring is set to 2, be disposed side by side on described moving contact top, be pressed on moving contact by described spring capping card, described moving contact, spring capping, action link rod is hinged by dynamic described bolt, the described hinged moving contact in fulcrum bolt one end and spring capping, the other end is hinged on the wall of described mounting box, described moving contact brace is U-shaped, one end is provided with terminals sub-aperture, for the introducing of external load line, the other end to be connected with described moving contact by being flexible coupling, described moving contact group, stationary contact head group is arranged in described mounting box like this: by the first moving contact group, first stationary contact head group composition the first sets of contacts and by the second moving contact group, second sets of contacts of the second stationary contact head group composition is oppositely arranged, and the moving contact action face of the moving contact action face of the first moving contact group and the second moving contact group is arranged in different action plane, first is made to move like this, stationary contact head group and second is moved, stagger between the working face of stationary contact head group certain distance, to arrange the Z-shaped arc-extinguish chamber with two arc control device between sets of contacts.
Further setting, described first stationary contact head group is identical with the structure of the second stationary contact head group, be separately positioned on fixed contact brace, described fixed contact brace is set to Ω shape, one end is set to external wiring terminal, the other end is provided with four fixed contact fixing holes, two circular boss are provided with in the centre of fixed contact fixing hole, described first stationary contact head group and the second stationary contact head group comprise fixed contact, fixed contact supporting bracket and fastening bolt, described fixed contact is provided with contact end and stiff end, described contact end is welded with contact silver point, two fixing holes are provided with in the middle of described stiff end, the base of stiff end is provided with two semi-circular recesses, the first described stationary contact head group and the second stationary contact head group are oppositely fixed on described fixed contact brace by described fastening bolt by the fixing hole of fixed contact supporting bracket and fixed contact stiff end, at this moment, two semi-circular recesses on described fixed contact stiff end base just in time holding in two round boss of fixed contact brace, and two of described fixed contact contact end are just in time in the first described moving contact group, the moving contact bottom of the second moving contact group, on described fixed contact brace, the setting of round boss and fixed contact stiff end base semicircle groove is arranged so that the position of fixed contact in assembling and use procedure is not easily moved, and the setting of fixed contact supporting bracket enhances intensity and the elasticity of fixed contact, these are all conducive to the stability of contact work.
Further setting, described arc-extinguish chamber is Z-shaped, upper and lower two ends are parallel outer wall, centre is connected by a skew wall, arc control device are respectively provided with in described skew wall two side, in described arc control device by inside outer wall and skew wall two skew back to being provided with arc quenching plate, two ends of described arc quenching plate are provided with electric arc import and electric arc outlet, described arc-extinguish chamber is arranged between the sets of contacts of conventional power supply, stand-by power supply, enables the contact arc-extinguishing of conventional power supply and stand-by power supply use independently arc control device separately.
The beneficial effect that the arc-control device of the double power supply automatic transfer switch of above structure has is: due to the conventional power supply of double power supply automatic transfer switch and the dynamic of stand-by power supply, fixed contact is arranged on different working faces, simultaneously dynamic, special Z-shaped arc-extinguish chamber is provided with between fixed contact, arc control device are respectively used when it can accomplish the action contact disjunction load current of conventional power supply in duplicate supply and stand-by power supply, length due to arc control device is the distance between conventional power supply and the moving contact of stand-by power supply, and traditional double power supply arc-extinguish chamber arranges a flash barrier between this distance, thus compared with the contraction in length half of arc control device of the present invention, the present invention can make arc control device obtain the longer arc extinguishing Distance geometry longer quenching time in limited volume, arc control device of the present invention can set out into nock easily and go out nock simultaneously, thus arc energy is better decayed, thus better arc quenching effect can be obtained.
Accompanying drawing explanation
Fig. 1 is contact arc-extinguishing system front view of the present invention;
Fig. 2 is Fig. 1 contact system three-dimensional structure diagram;
Fig. 3 is the vertical view of Fig. 1;
Fig. 4 is Fig. 1 moving contact set of pieces exploded view;
Fig. 5 is Fig. 1 stationary contact head group three-dimensional structure diagram;
Fig. 6 is Fig. 5 fixed contact set of pieces exploded view;
Fig. 7 is Fig. 1 arc-extinguish chamber three-dimensional structure diagram.
Embodiment
Composition graphs 1 ~ Fig. 7, by specific embodiment, the invention will be further described.
A kind of contact arc-extinguishing system of double power supply automatic transfer switch, as Fig. 1, shown in Fig. 2, comprise the first rotating shaft 7 and the second rotating shaft 8 controlled by duplicate supply actuating mechanism, be arranged on the first moving contact group 2 on the first rotating shaft 7, be arranged on the second moving contact group 5 on the second rotating shaft 8, be arranged on the first stationary contact head group 3 of described first moving contact group 2 bottom, be arranged on the second stationary contact head group 4 of described second moving contact group 5 bottom, be arranged on described first moving contact group 2, first stationary contact head group 3 and the second moving contact group 5, arc-extinguish chamber between second stationary contact head group 49 and described first moving contact group 2 is set, first stationary contact head group 3, second moving contact group 5, the mounting box 6 of the second stationary contact head group 4 and arc-extinguish chamber 9.
Further setting, as shown in Figure 2 to 4, the first described moving contact group 2 is identical with the structure of the second moving contact group 5, comprise rotating shaft 7, rotating shaft axle sleeve 701, action link rod 207, link connector pin 2071, spring capping 206, Compress Spring 205, moving contact 204, fulcrum bolt 2042, dynamic some bolt 2041, moving contact brace 202 and be flexible coupling 203, described rotating shaft axle sleeve 701 is set on rotating shaft 7, described action link rod 207 is hinged by link connector pin 2071 and rotating shaft axle sleeve 701, described Compress Spring 205 is set to 2, be disposed side by side on the top of moving contact 204, be pressed on moving contact 204 by described spring capping 206 card, described moving contact 204, spring capping 206, action link rod 207 is hinged by dynamic described bolt 2041, the described hinged moving contact 204 in fulcrum bolt 2042 one end and spring capping 206, the other end is hinged on the wall of described mounting box 6, described moving contact brace 202 is U-shaped, one end is set to external wiring terminal 2021, for the introducing of external load line, the other end 203 to be connected with described moving contact 204 by being flexible coupling, described sets of contacts is arranged in described mounting box like this: by the first moving contact group 2, first stationary contact head group 3 form the first sets of contacts and by the second moving contact group 5, the second sets of contacts that second stationary contact head group 4 forms is oppositely arranged, and the action face of the moving contact 504 of the action face of the moving contact 204 of the first moving contact group 2 and the second moving contact group 5 is arranged in different action plane, first is made to move like this, stationary contact head group and second is moved, stagger between the working face of stationary contact head group certain distance, to arrange the Z-shaped arc-extinguish chamber 9 with two arc control device between two groups of sets of contacts.
Further setting, as Fig. 1, Fig. 5, shown in Fig. 6, described first stationary contact head group 3 is identical with the structure of the second stationary contact head group 4, be separately positioned on fixed contact brace 1, described fixed contact brace 1 is set to Ω shape, one end is set to external wiring terminal 101, for the introducing of external load line, the other end is provided with four fixed contact fixing holes 103, two circular boss 102 are provided with in the centre of fixed contact fixing hole 103, described stationary contact head group comprises fixed contact 31, fixed contact supporting bracket 303 and fastening bolt 304, described fixed contact 31 is provided with contact end 302 and stiff end 301, described contact end 302 is welded with contact silver point, two fixing holes 3011 are provided with in the middle of described stiff end 301, the base of stiff end 301 is provided with two semi-circular recesses 3012, the first described stationary contact head group 3 is oppositely fixed on described fixed contact brace 1 by described fastening bolt 304 by fixed contact supporting bracket 303 and fixed contact stiff end 301 and the second described stationary contact head group 4, at this moment, two semi-circular recesses on described fixed contact stiff end base just in time holding in two round boss of fixed contact brace, and the contact end 302 of described stationary contact head group 3 is just in time in moving contact 204 bottom of described first moving contact group 2, the contact end 402 of described second stationary contact head group 4 is just in time in moving contact 504 bottom of described second moving contact group 5, on described fixed contact brace 1, the setting of round boss 102 and fixed contact stiff end base semicircle groove is arranged so that the position of fixed contact in assembling and use procedure is not easily moved, and the setting of fixed contact supporting bracket enhances intensity and the elasticity of fixed contact contact end, these are all conducive to the stability of contact work.
Further setting, as shown in Figure 7, described arc-extinguish chamber 9 is Z-shaped, upper and lower two ends are parallel outer wall 903 and 904, centre is connected by a skew wall 901, described skew wall 901 2 side is provided with the first arc control device and the second arc control device, by the inner side of outer wall 903 with the upside of skew wall 901 is oblique is provided with arc quenching plate 906 in the first arc control device of described upside, two ends of described arc quenching plate 906 are provided with electric arc import 9061 and electric arc outlet 9062, by the inner side of outer wall 904 with the downside of skew wall 901 is oblique is provided with arc quenching plate 905 in the second arc control device of described downside, two ends of described arc quenching plate 905 are provided with electric arc import 9051 and electric arc outlet 9052, described arc-extinguish chamber 9 is arranged on conventional power supply, between the sets of contacts of stand-by power supply, so that the contact arc-extinguishing of conventional power supply and stand-by power supply can use independently arc control device separately.
It should be noted that: above-described embodiment is only for example of the present invention is clearly described; and the restriction not to execution mode; for those of ordinary skill in the field; can also make other changes in different forms on the basis of the above description; here exhaustive without the need to also giving all execution modes, and thus the apparent change of extending out or variation be still among protection scope of the present invention.
Claims (4)
1. the contact arc-extinguishing system of a double power supply automatic transfer switch, it is characterized in that: comprise two rotating shafts controlled by duplicate supply actuating mechanism, be arranged on the first moving contact group on described rotating shaft and the second moving contact group, be arranged on the first stationary contact head group of described first moving contact group bottom, be arranged on the second stationary contact head group of described second moving contact group bottom, be arranged on described first moving contact group, first stationary contact head group and the second moving contact group, arc-extinguish chamber between second stationary contact head group and described first moving contact group is set, first stationary contact head group, second moving contact group, the mounting box of the second stationary contact head group and arc-extinguish chamber.
2. contact arc-extinguishing system according to claim 1, it is characterized in that: the first described moving contact group is identical with the structure of the second moving contact group, comprise rotating shaft, rotating shaft axle sleeve, action link rod, link connector pin, spring capping, Compress Spring, moving contact, fulcrum bolt, dynamic some bolt, moving contact brace and being flexible coupling, described rotating shaft axle sleeve is on the rotary shaft sheathed, described action link rod by link connector pin and rotating shaft axle sleeve hinged, described Compress Spring is set to 2, be disposed side by side on described moving contact top, be pressed on moving contact by described spring capping card, described moving contact, spring capping, action link rod is hinged by dynamic described bolt, the described hinged moving contact in fulcrum bolt one end and spring capping, the other end is hinged on the wall of described mounting box, described moving contact brace is U-shaped, one end is set to external wiring terminal, the other end to be connected with described moving contact by being flexible coupling, described moving contact group, stationary contact head group is arranged in described mounting box like this: by the first moving contact group, first stationary contact head group composition the first sets of contacts and by the second moving contact group, second sets of contacts of the second stationary contact head group composition is oppositely arranged, and the moving contact action face of the moving contact action face of the first moving contact group and the second moving contact group is arranged in different action plane.
3. contact arc-extinguishing system according to claim 1, it is characterized in that: described first stationary contact head group is identical with the structure of the second stationary contact head group, be separately positioned on fixed contact brace, described fixed contact brace is set to Ω shape, one end is set to external wiring terminal, the other end is provided with four fixed contact fixing holes, two circular boss are provided with in the centre of fixed contact fixing hole, described first stationary contact head group and the second stationary contact head group comprise fixed contact, fixed contact supporting bracket and fastening bolt, described fixed contact is provided with contact end and stiff end, described contact end is welded with contact silver point, two fixing holes are provided with in the middle of described stiff end, the base of stiff end is provided with two semi-circular recesses, the first described stationary contact head group and the second stationary contact head group are oppositely fixed on described fixed contact brace by described fastening bolt by the fixing hole of fixed contact supporting bracket and fixed contact stiff end, at this moment, two semi-circular recesses on described fixed contact stiff end base just in time holding in two round boss of fixed contact brace, and two of described fixed contact contact end are just in time in the first described moving contact group, the moving contact bottom of the second moving contact group.
4. contact arc-extinguishing system according to claim 1, it is characterized in that: described arc-extinguish chamber is Z-shaped, upper and lower two ends are parallel outer wall, centre is connected by a skew wall, arc control device are respectively provided with in described skew wall two side, in described arc control device by inside outer wall and skew wall two skew back to being provided with arc quenching plate, two ends of described arc quenching plate are provided with electric arc import and electric arc outlet.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510441191.XA CN104992859A (en) | 2015-07-24 | 2015-07-24 | Contact arc extinguishing system for dual-power supply automatic transfer switch |
CN201520966622.XU CN205282330U (en) | 2015-07-24 | 2015-11-27 | A arc -Quenching system for two power automatic transfer switch |
CN201510847274.9A CN105374595B (en) | 2015-07-24 | 2015-11-27 | Contact arc-extinguishing system for double power supply automatic transfer switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510441191.XA CN104992859A (en) | 2015-07-24 | 2015-07-24 | Contact arc extinguishing system for dual-power supply automatic transfer switch |
Publications (1)
Publication Number | Publication Date |
---|---|
CN104992859A true CN104992859A (en) | 2015-10-21 |
Family
ID=54304661
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201510441191.XA Withdrawn CN104992859A (en) | 2015-07-24 | 2015-07-24 | Contact arc extinguishing system for dual-power supply automatic transfer switch |
CN201510847274.9A Active CN105374595B (en) | 2015-07-24 | 2015-11-27 | Contact arc-extinguishing system for double power supply automatic transfer switch |
CN201520966622.XU Withdrawn - After Issue CN205282330U (en) | 2015-07-24 | 2015-11-27 | A arc -Quenching system for two power automatic transfer switch |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201510847274.9A Active CN105374595B (en) | 2015-07-24 | 2015-11-27 | Contact arc-extinguishing system for double power supply automatic transfer switch |
CN201520966622.XU Withdrawn - After Issue CN205282330U (en) | 2015-07-24 | 2015-11-27 | A arc -Quenching system for two power automatic transfer switch |
Country Status (1)
Country | Link |
---|---|
CN (3) | CN104992859A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108133868A (en) * | 2017-12-29 | 2018-06-08 | 武汉长海电气科技开发有限公司 | A kind of D.C. contactor contact system |
CN109326470A (en) * | 2018-11-20 | 2019-02-12 | 北京明日电器设备有限责任公司 | A kind of bridge-type moving contact double power supply automatic transfer switch |
CN110416031A (en) * | 2019-08-19 | 2019-11-05 | 德力西电气有限公司 | Four breakpoint contactors |
CN110517913A (en) * | 2019-09-27 | 2019-11-29 | 兴宇科技沧州有限公司 | A kind of dual power supply arc-control device |
CN111048370A (en) * | 2019-12-28 | 2020-04-21 | 常熟市通润开关厂有限公司 | High-segmentation arc extinguish chamber for circuit breaker |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104992859A (en) * | 2015-07-24 | 2015-10-21 | 北京明日电器设备有限责任公司 | Contact arc extinguishing system for dual-power supply automatic transfer switch |
CN106158444B (en) * | 2016-08-24 | 2019-03-15 | 盎迈智能科技(上海)有限公司 | Plug-in dual-power transfer switch |
EP3457423B1 (en) * | 2017-09-15 | 2021-12-22 | ABB Schweiz AG | Change-over switch |
CN108231454A (en) * | 2018-03-03 | 2018-06-29 | 浙江阿尔斯通电气有限公司 | Double power supply automatic transfer switch |
CN110223867B (en) * | 2019-07-01 | 2024-02-20 | 乐清东海电器有限公司 | Moving contact interlocking mechanism of automatic transfer switch wiring terminal |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2517465B1 (en) * | 1981-11-27 | 1986-05-02 | Merlin Gerin | MINIATURE CIRCUIT BREAKER WITH TWO ADJUSTED SWITCHING CHAMBERS |
US8604377B2 (en) * | 2011-07-15 | 2013-12-10 | Vitzrotech Co., Ltd | Automatic transfer switch |
CN204045445U (en) * | 2014-05-07 | 2014-12-24 | 苏州飞腾电器有限公司 | There is the dual-power transfer switch of novel contact configurations |
CN104992859A (en) * | 2015-07-24 | 2015-10-21 | 北京明日电器设备有限责任公司 | Contact arc extinguishing system for dual-power supply automatic transfer switch |
-
2015
- 2015-07-24 CN CN201510441191.XA patent/CN104992859A/en not_active Withdrawn
- 2015-11-27 CN CN201510847274.9A patent/CN105374595B/en active Active
- 2015-11-27 CN CN201520966622.XU patent/CN205282330U/en not_active Withdrawn - After Issue
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108133868A (en) * | 2017-12-29 | 2018-06-08 | 武汉长海电气科技开发有限公司 | A kind of D.C. contactor contact system |
CN108133868B (en) * | 2017-12-29 | 2024-04-30 | 武汉长海电气科技开发有限公司 | Direct current contactor contact system |
CN109326470A (en) * | 2018-11-20 | 2019-02-12 | 北京明日电器设备有限责任公司 | A kind of bridge-type moving contact double power supply automatic transfer switch |
CN110416031A (en) * | 2019-08-19 | 2019-11-05 | 德力西电气有限公司 | Four breakpoint contactors |
CN110517913A (en) * | 2019-09-27 | 2019-11-29 | 兴宇科技沧州有限公司 | A kind of dual power supply arc-control device |
CN111048370A (en) * | 2019-12-28 | 2020-04-21 | 常熟市通润开关厂有限公司 | High-segmentation arc extinguish chamber for circuit breaker |
Also Published As
Publication number | Publication date |
---|---|
CN205282330U (en) | 2016-06-01 |
CN105374595B (en) | 2018-09-18 |
CN105374595A (en) | 2016-03-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN104992859A (en) | Contact arc extinguishing system for dual-power supply automatic transfer switch | |
CN104616918A (en) | Automatic PC-level dual-power changeover switch | |
CN105225861A (en) | PC level double power supply automatic transfer switch | |
CN203386644U (en) | Directly-moving type isolation switch | |
CN205081081U (en) | Miniature circuit breaker | |
CN104810186A (en) | Moving contact unit and three-position switch with moving contact unit | |
CN204289124U (en) | The contact system of automatic change-over | |
CN204991545U (en) | Two power automatic transfer switch contact system of PC level | |
CN105161379A (en) | Linkage device for realizing automatic closing function of circuit breaker | |
CN202282288U (en) | Seesaw switch with two-circuit structure and forced disconnection function | |
CN204884948U (en) | Two power automatic transfer switch's arc extinguishing system | |
CN204189644U (en) | A kind of elevator-distance switch UKT device of improvement | |
CN202111014U (en) | Breaker auxiliary switch | |
CN103065852A (en) | Novel double-line forcefully-breaking rocker switch | |
CN204332854U (en) | A kind of transmission device of auxiliary switch for circuit breaker | |
CN205693991U (en) | Guidance panel card bit-type home appliance | |
CN204142773U (en) | Electric measuring instrument and mounting seat thereof, magnitude of current measuring equipment | |
CN204178953U (en) | A kind of electric equipment change over switch | |
CN203260785U (en) | Socket structure without welding spots | |
CN203932614U (en) | Socket that can Rotate 180 degree | |
CN203983939U (en) | A kind of protective device | |
CN204189648U (en) | Switch | |
CN209087629U (en) | A kind of double power supply automatic transfer switch switching mechanism | |
CN2901550Y (en) | Switch device | |
CN107658631B (en) | Switching device for radar power supply protection |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C04 | Withdrawal of patent application after publication (patent law 2001) | ||
WW01 | Invention patent application withdrawn after publication |
Application publication date: 20151021 |