CN209843534U - Double-break vacuum on-load change-over switch - Google Patents
Double-break vacuum on-load change-over switch Download PDFInfo
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- CN209843534U CN209843534U CN201920941176.5U CN201920941176U CN209843534U CN 209843534 U CN209843534 U CN 209843534U CN 201920941176 U CN201920941176 U CN 201920941176U CN 209843534 U CN209843534 U CN 209843534U
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- over switch
- turntable
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- 230000007246 mechanism Effects 0.000 claims abstract description 86
- 230000001360 synchronised effect Effects 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims abstract description 14
- 230000007704 transition Effects 0.000 claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims description 15
- 229910001080 W alloy Inorganic materials 0.000 claims description 3
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 30
- 230000009471 action Effects 0.000 description 3
- 230000008033 biological extinction Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The utility model provides a two outage vacuum have a change over switch, the mounting flange of being convenient for to change over switch installation including change over switch upper end, mounting flange's below is change over switch tube-shape body, installs change over switch and vacuum tube synchronous operation mechanism in change over switch tube-shape body, install two outage vacuum tubes on the vacuum tube operating device, main contact and transition resistance are installed to vacuum tube operating device's below, installs quick-operation mechanism in change over switch tube-shape body's bottom, thereby quick-operation mechanism reaches the purpose of change over switch quick adjustment shunting gear through the pivot drive change over switch rather than being connected and the vacuum tube of breaking, and when single vacuum tube damaged, another way vacuum tube still can independently break the outage to improve the vacuum and have a vacuum tube to carry the shunting switch reliability.
Description
Technical Field
The utility model relates to an electric power equipment field specifically is a double break vacuum has a change over switch that carries.
Background
In order to improve the quality of electric energy, the on-load transfer switch of a large transformer gradually adopts a vacuum on-load transfer switch to replace the transfer switch of a traditional mechanical contact, which is a technical trend. The characteristics of high dielectricity and strong arc quenching in the high vacuum environment of the vacuum tube are utilized, so that the on-off of large current is realized in the vacuum tube, the performance and the service life of the on-load tap-changer are improved, and the volume of the equipment is greatly reduced.
Because the vacuum tube is a highly sealed precise assembly and is used in the environment of ultrahigh pressure and large current, the requirements on the vacuum degree and other performance parameters are very high. When the vacuum tube breaks down, the transformer is easy to be damaged.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a double break vacuum has a change over switch, when single vacuum tube damaged, another way vacuum bubble still can independently break current to it has a change over switch reliability to improve the vacuum.
The technical scheme of the utility model:
the utility model provides a double break vacuum has a change over switch, includes the mounting flange that the change over switch upper end was convenient for installed change over switch, the below of mounting flange is change over switch tube-shape body, installs change over switch and vacuum tube synchronous operation mechanism in change over switch tube-shape body, install the double break vacuum tube on the vacuum tube synchronous operation mechanism, switch contact and transition resistance are installed to vacuum tube synchronous operation mechanism's below, install the snap action mechanism in the bottom of change over switch tube-shape body, thereby the snap action mechanism reaches the purpose that the change over switch switches over the double break vacuum tube fast through pivot drive change over switch and the vacuum tube synchronous operation mechanism who is connected with it.
The reversing switch and the vacuum tube synchronous operating mechanism are installed around the cylindrical body of the change-over switch at equal intervals.
The vacuum tube synchronous operating mechanism comprises an upper supporting plate, a lower supporting plate, a vacuum tube supporting plate, an upper cam mechanism and a lower cam mechanism;
the rotating shaft is fixedly connected with an upper cam mechanism and a lower cam mechanism, and the upper cam mechanism and the lower cam mechanism synchronously rotate along with the rotating shaft;
an upper supporting plate is fixedly arranged on the periphery of the upper cam mechanism, and a lower supporting plate is fixedly arranged on the periphery of the lower cam mechanism;
a vacuum tube supporting plate is fixedly arranged between the upper supporting plate and the lower supporting plate, and a double-fracture vacuum tube is fixed at a bayonet on the outer side of the vacuum tube supporting plate;
the lower side of the upper supporting plate and the upper side of the lower supporting plate are correspondingly provided with lever mechanisms;
when the upper cam mechanism and the lower cam mechanism rotate along with the rotating shaft, the two ends of the double-fracture vacuum tube are synchronously disconnected and reset through the lever mechanism.
The lower side of the upper cam mechanism and the upper side of the lower cam mechanism are correspondingly provided with guide rails;
the lever mechanism comprises a lever, one end of the lever, which is close to the guide rail, is provided with a roller, the roller is contacted with the guide rail when the upper cam mechanism and the lower cam mechanism rotate along with the rotating shaft, the lever is supported by a bracket arranged on the upper supporting plate and the lower supporting plate, the bracket is provided with a pin shaft which transversely penetrates through the lever and is hinged with the bracket, and the lever, the bracket and the pin shaft form the lever mechanism; and a pull rod is arranged at one end of the lever, which is far away from the guide rail, and the pull rod is connected to a switch of the double-fracture vacuum tube through a stud.
Springs are arranged on the upper supporting plate and the lower supporting plate corresponding to the end parts of the pull rods, the springs are arranged in mounting grooves formed in the upper supporting plate and the lower supporting plate, and the springs are matched with the rollers to realize that a lever mechanism synchronously breaks and resets two ends of the double-fracture vacuum tube; trapezoidal lugs are arranged on the guide rails at equal intervals.
The reversing switch comprises an upper layer turntable and a lower layer turntable which are sequentially arranged on a rotating shaft from top to bottom, a lower supporting plate is arranged below the lower layer turntable, a mounting seat is arranged on the lower supporting plate, the upper end and the lower end of the mounting seat are arranged in mounting grooves formed in the outer edges of the upper supporting plate and the lower supporting plate, an upper layer reversing switch contact and a lower layer reversing switch contact are arranged on the mounting seat corresponding to the upper layer turntable and the lower layer turntable, contacts are arranged on the upper layer turntable and the lower layer turntable respectively, the number of the contacts arranged on the upper layer turntable and the number of the contacts arranged on the lower layer turntable are three at equal intervals, the three contacts arranged on the upper layer turntable and the three contacts arranged on the lower layer turntable are arranged in a staggered mode, namely the contacts of the upper layer turntable correspond to a spacing area between two adjacent contacts of the lower layer turntable, and the contacts arranged on the upper layer, therefore, when the contact of the upper reversing switch contacts with the contact of the upper turntable, the contact of the lower reversing switch contacts with the contact of the lower turntable, and the copper-tungsten alloy contact is welded at the end of the contact.
The contact extends out of the outer edges of the upper layer turntable and the lower layer turntable so as to be conveniently contacted with the upper layer reversing switch contact and the lower layer reversing switch contact.
The contact installation positions of the upper layer turntable and the lower layer turntable are also provided with connecting columns, and two ends of the connecting plate are respectively connected to the connecting columns corresponding to the upper layer turntable and the lower layer turntable.
The end parts of the upper layer reversing switch contact and the lower layer reversing switch contact are provided with rolling wheels, the contacts are in rolling contact with the rolling wheels, the number of the rolling wheels at the end parts of the upper layer reversing switch contact and the lower layer reversing switch contact is two, the contacts are clamped between the two rolling wheels to ensure tight contact, and the contacts are fixedly arranged in mounting grooves formed in the upper layer rotary table and the lower layer rotary table through screws.
The contact is arranged in a circular arc shape opposite to the rotary disc, and an arc-shaped insertion end used for ensuring stable installation is further arranged at one end of the contact.
Compared with the prior art, the beneficial effects of the utility model are that: when the series double-fracture vacuum tube is used for arc extinction, the arc extinction capability is enhanced, and meanwhile, the recovery voltage between the contact fractures can be effectively reduced; the two reversing switches also have certain arc extinguishing capability, and when the vacuum tube fails, the contacts of the reversing switches can complete switching; the change-over switch adopts double-resistor transition, the burning loss of the vacuum tube contacts is basically the same, and the electrical service life of the whole switch is greatly prolonged.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of the vacuum tube synchronous operating mechanism of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2;
fig. 4 is a schematic diagram of the reversing switch of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution:
the utility model provides a double break vacuum has a change over switch, includes the mounting flange 1 that change over switch upper end was convenient for install change over switch, mounting flange 1's below is change over switch tube-shape body, installs change over switch 2 and vacuum tube synchronous operation mechanism 4 in the change over switch tube-shape body, install double-break vacuum tube 3 on the vacuum tube synchronous operation mechanism 4, switch contact 5 and transition resistance 6 are installed to vacuum tube synchronous operation mechanism 4's below, installs fast-moving mechanism 7 in the bottom of change over switch tube-shape body, thereby fast-moving mechanism 7 reaches the purpose that change over switch fast switch switched double-break vacuum tube 3 through 8 drive change over switch 2 of pivot 8 drive and vacuum tube synchronous operation mechanism 4 be connected with it.
The reversing switch 2 and the vacuum tube synchronous operating mechanism 4 are installed around the cylindrical body of the change-over switch at equal intervals.
Referring to fig. 2, the vacuum tube synchronous operating mechanism 4 includes an upper support plate 9, a lower support plate 10, a vacuum tube support plate 11, an upper cam mechanism 12 and a lower cam mechanism 13;
an upper cam mechanism 12 and a lower cam mechanism 13 are fixedly connected to the rotating shaft 8, and the upper cam mechanism 12 and the lower cam mechanism 13 synchronously rotate along with the rotating shaft 8;
an upper supporting plate 9 is fixedly arranged on the periphery of the upper cam mechanism 12, and a lower supporting plate 10 is fixedly arranged on the periphery of the lower cam mechanism 13;
a vacuum tube supporting plate 11 is fixedly arranged between the upper supporting plate 9 and the lower supporting plate 10, and a double-fracture vacuum tube 3 is fixed at an outer bayonet of the vacuum tube supporting plate 11;
the lower side of the upper supporting plate 9 and the upper side of the lower supporting plate 10 are correspondingly provided with lever mechanisms;
when the upper cam mechanism 12 and the lower cam mechanism 13 rotate along with the rotating shaft 8, the two ends of the double-fracture vacuum tube 3 are synchronously disconnected and reset through the lever mechanism.
Referring to fig. 3, the lower side of the upper cam mechanism 12 and the upper side of the lower cam mechanism 13 are correspondingly provided with a guide rail 16;
the lever mechanism comprises a lever 14, a roller 15 is arranged at one end of the lever 14 close to a guide rail 16, the roller 15 is in contact with the guide rail 16 when the upper cam mechanism 12 and the lower cam mechanism 13 rotate along with the rotating shaft 8, the lever 14 is supported by a bracket 17 arranged on the upper supporting plate 9 and the lower supporting plate 10, a pin shaft 18 which transversely penetrates through the lever 14 to enable the lever 14 to be hinged with the bracket 17 is arranged on the bracket 17, and the lever 14, the bracket 17 and the pin shaft 18 form the lever mechanism; the end of the lever 14 remote from the guide rail 16 is provided with a pull rod 20, and the pull rod 20 is connected to the switch of the double-fracture vacuum tube 3 through a stud 19.
The upper supporting plate 9 and the lower supporting plate 10 are provided with springs 21 corresponding to the ends of the pull rods 20, the springs 21 are arranged in mounting grooves formed in the upper supporting plate 9 and the lower supporting plate 10, and the springs 21 and the rollers 15 are matched to realize that a lever mechanism synchronously disconnects and resets two ends of the double-fracture vacuum tube 3; trapezoidal lugs are arranged on the guide rail 16 at equal intervals.
Referring to fig. 4, the reversing switch 2 includes an upper layer turntable 22 and a lower layer turntable 23 sequentially installed on a rotating shaft 8 from top to bottom, a lower support plate 10 is installed below the lower layer turntable 23, an installation seat 24 is installed on the lower support plate 10, upper and lower ends of the installation seat 24 are installed in installation grooves 32 formed in outer edges of the upper support plate 9 and the lower support plate 10, an upper layer reversing switch contact 29 and a lower layer reversing switch contact 30 are installed on the installation seat 24 corresponding to the upper layer turntable 22 and the lower layer turntable 23, contacts 25 are installed on the upper layer turntable 22 and the lower layer turntable 23, three contacts 25 installed on the upper layer turntable 22 and the lower layer turntable 23 are equally spaced, three contacts 25 installed on the upper layer turntable 22 and three contacts 25 installed on the lower layer turntable 23 are staggered, that is, that a contact 25 of the upper layer turntable 22 corresponds to a spacing area between two adjacent contacts 25 of the lower layer turntable 23, the contacts 25 arranged on the upper layer turntable 22 and the lower layer turntable 23 are correspondingly connected through the connecting plates 27, so that the contact 25 of the lower layer turntable 23 is separated from the contact 30 of the upper layer reversing switch when the contact 29 of the upper layer reversing switch is contacted with the contact 25 of the upper layer turntable 22, and the end part of the contact 25 is welded with the copper-tungsten alloy contact 28.
The contacts 25 extend beyond the outer edges of the upper and lower rotary tables 22, 23 to facilitate contact with upper and lower diverter switch contacts 29, 30.
The contact 25 installation positions of the upper layer turntable 22 and the lower layer turntable 23 are also provided with connecting columns 26, and two ends of the connecting plate 27 are respectively connected to the connecting columns 26 corresponding to the upper layer turntable 22 and the lower layer turntable 23.
The end parts of the upper layer reversing switch contact 29 and the lower layer reversing switch contact 30 are provided with rolling wheels 31, the contact 25 is in rolling contact with the rolling wheels 31, the number of the rolling wheels 31 at the end parts of the upper layer reversing switch contact 29 and the lower layer reversing switch contact 30 is two, the contact 25 is clamped between the two rolling wheels 31 to ensure tight contact, and the contact 25 is fixedly arranged in mounting grooves formed in the upper layer turntable 22 and the lower layer turntable 23 through screws.
The contact 25 is arranged in a circular arc shape opposite to the turntable, and an arc insertion end for ensuring stable installation is further arranged at one end of the contact 25.
The utility model discloses a series connection double-fracture vacuum tube carries out the arc extinguishing, two fracture synchronization actions, and the recovery voltage after the contact is opened and shut reduces to original half to do benefit to the arc extinguishing and prevent to restrike and take place. Two vacuum tube explosion chambers are respectively relatively independent and all have independent breaking capacity, and the probability of gas leakage is little simultaneously, improves and switches the reliability.
The utility model discloses a circuit design and the structural design of symmetry make the contact task fuzzify, no longer definitely give certain contact undertake main break-make contact task or undertake the task of transition contact, but let the task of main break-make contact and transition contact be undertaken by two way vacuum tubes in turn, switch the program symmetry, the switching task of 2 vacuum tubes is unanimous in the transition circuit, has greatly improved whole tapping switch's electric life-span.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A double-break vacuum on-load change-over switch comprises an installation flange (1) which is arranged at the upper end of the change-over switch and is convenient for installing the change-over switch, it is characterized in that a change-over switch cylindrical body is arranged below the mounting flange (1), a reversing switch (2) and a vacuum tube synchronous operating mechanism (4) are arranged in the change-over switch cylindrical body, the vacuum tube synchronous operating mechanism (4) is provided with a double-fracture vacuum tube (3), a main contact (5) and a transition resistor (6) are arranged below the vacuum tube synchronous operating mechanism (4), the fast-acting mechanism (7) is installed at the bottom of the cylindrical body of the change-over switch, and the change-over switch (2) and the vacuum tube synchronous operation mechanism (4) are driven by the fast-acting mechanism (7) through a rotating shaft (8) connected with the fast-acting mechanism so as to achieve the purpose of fast adjusting the tapping gear of the change-over switch.
2. A double break vacuum on-load diverter switch according to claim 1, characterized in that the diverter switch (2) and the vacuum tube synchronous operating mechanism (4) are mounted equally spaced around the diverter switch cylindrical body.
3. A dual-break vacuum on-load diverter switch according to claim 1, characterized in that the vacuum tube synchronous operating mechanism (4) comprises an upper support plate (9), a lower support plate (10), a vacuum tube support plate (11), an upper cam mechanism (12) and a lower cam mechanism (13);
the rotating shaft (8) is fixedly connected with an upper cam mechanism (12) and a lower cam mechanism (13), and the upper cam mechanism (12) and the lower cam mechanism (13) synchronously rotate along with the rotating shaft (8);
an upper supporting plate (9) is fixedly arranged on the periphery of the upper cam mechanism (12), and a lower supporting plate (10) is fixedly arranged on the periphery of the lower cam mechanism (13);
a vacuum tube supporting plate (11) is fixedly arranged between the upper supporting plate (9) and the lower supporting plate (10), and a double-fracture vacuum tube (3) is fixed at an outer bayonet of the vacuum tube supporting plate (11);
lever mechanisms are correspondingly arranged on the lower side of the upper supporting plate (9) and the upper side of the lower supporting plate (10);
when the upper cam mechanism (12) and the lower cam mechanism (13) rotate along with the rotating shaft (8), the two ends of the double-fracture vacuum tube (3) are synchronously disconnected and reset through the lever mechanism.
4. A double-break vacuum on-load diverter switch according to claim 3, characterized in that the lower side of the upper cam mechanism (12) and the upper side of the lower cam mechanism (13) are provided with guide rails (16) correspondingly; the lever mechanism comprises a lever (14), one end of the lever (14), which is close to a guide rail (16), is provided with a roller (15), the roller (15) is contacted with the guide rail (16) when an upper cam mechanism (12) and a lower cam mechanism (13) rotate along with a rotating shaft (8), the lever (14) is supported by a bracket (17) arranged on an upper supporting plate (9) and a lower supporting plate (10), the bracket (17) is provided with a pin shaft (18) which traverses the lever (14) and is hinged with the bracket (17), and the lever (14), the bracket (17) and the pin shaft (18) form the lever mechanism; and a pull rod (20) is arranged at one end of the lever (14) far away from the guide rail (16), and the pull rod (20) is connected to a switch of the double-fracture vacuum tube (3) through a stud (19).
5. The double-break vacuum on-load change-over switch according to claim 4, characterized in that the upper support plate (9) and the lower support plate (10) are provided with springs (21) corresponding to the ends of the pull rod (20), the springs (21) are arranged in the mounting grooves formed on the upper support plate (9) and the lower support plate (10), and the springs (21) are matched with the rollers (15) to realize the synchronous breaking and resetting operation of the two ends of the double-break vacuum tube (3) by the lever mechanism; trapezoidal lugs are arranged on the guide rail (16) at equal intervals.
6. The double-break vacuum on-load transfer switch according to claim 4, wherein the change-over switch (2) comprises an upper layer turntable (22) and a lower layer turntable (23) sequentially mounted on the rotating shaft (8) from top to bottom, a lower support plate (10) is disposed below the lower layer turntable (23), a mounting seat (24) is mounted on the lower support plate (10), the upper end and the lower end of the mounting seat (24) are mounted in mounting grooves (32) formed in the outer edges of the upper support plate (9) and the lower support plate (10), an upper layer change-over switch contact (29) and a lower layer change-over switch contact (30) are mounted on the mounting seat (24) corresponding to the upper layer turntable (22) and the lower layer turntable (23), contacts (25) are mounted on the upper layer turntable (22) and the lower layer turntable (23), and three contacts (25) are equally spaced on the upper layer turntable (22) and the lower layer turntable (23), three contact (25) of installation on three contact (25) of upper carousel (22) and the lower floor carousel (23) of installation set up in the past, and the interval between the two adjacent contacts (25) of contact (25) of lower floor carousel (23) of upper carousel (22) correspondence promptly, contact (25) of installation on upper carousel (22) and lower floor carousel (23) are connected through connecting plate (27) one-to-one to reach contact (25) of upper reversing switch contact (29) and upper carousel (22) lower floor reversing switch contact (30) and lower floor carousel (23) and break away from, the tip welding of contact (25) has copper tungsten alloy contact (28).
7. A dual break vacuum on-load diverter switch according to claim 6, characterized in that the contacts (25) extend beyond the outer edges of the upper turntable (22) and the lower turntable (23) to facilitate contact with the upper diverter switch contacts (29) and the lower diverter switch contacts (30).
8. A double-break vacuum on-load diverter switch according to claim 6, characterized in that the contacts (25) of the upper turntable (22) and the lower turntable (23) are further provided with connecting posts (26), and two ends of the connecting plate (27) are respectively connected to the connecting posts (26) corresponding to the upper turntable (22) and the lower turntable (23).
9. A double-break vacuum on-load change-over switch according to claim 6, characterized in that the ends of the upper layer reversing switch contact (29) and the lower layer reversing switch contact (30) are provided with rolling wheels (31), the contact (25) is in rolling contact with the rolling wheels (31), the number of the rolling wheels (31) at the ends of the upper layer reversing switch contact (29) and the lower layer reversing switch contact (30) is two, the contact (25) is clamped between the two rolling wheels (31) to ensure tight contact, and the contact (25) is fixedly arranged in mounting grooves formed in the upper layer turntable (22) and the lower layer turntable (23) through screws.
10. A double break vacuum on-load diverter switch according to claim 6, characterized in that the contacts (25) are arranged in a circular arc shape with respect to the turntable, and one end of the contacts (25) is further provided with a curved insertion end to ensure stable installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920941176.5U CN209843534U (en) | 2019-06-21 | 2019-06-21 | Double-break vacuum on-load change-over switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920941176.5U CN209843534U (en) | 2019-06-21 | 2019-06-21 | Double-break vacuum on-load change-over switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209843534U true CN209843534U (en) | 2019-12-24 |
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ID=68898798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920941176.5U Active CN209843534U (en) | 2019-06-21 | 2019-06-21 | Double-break vacuum on-load change-over switch |
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| Country | Link |
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| CN (1) | CN209843534U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110189937A (en) * | 2019-06-21 | 2019-08-30 | 国家电网有限公司 | A kind of double-fracture vacuum has load switching switch |
| CN110189937B (en) * | 2019-06-21 | 2024-05-24 | 国家电网有限公司 | Double-break vacuum on-load change-over switch |
-
2019
- 2019-06-21 CN CN201920941176.5U patent/CN209843534U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110189937A (en) * | 2019-06-21 | 2019-08-30 | 国家电网有限公司 | A kind of double-fracture vacuum has load switching switch |
| CN110189937B (en) * | 2019-06-21 | 2024-05-24 | 国家电网有限公司 | Double-break vacuum on-load change-over switch |
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