CN211579608U - Low-voltage phase-change switch - Google Patents
Low-voltage phase-change switch Download PDFInfo
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- CN211579608U CN211579608U CN202020389216.2U CN202020389216U CN211579608U CN 211579608 U CN211579608 U CN 211579608U CN 202020389216 U CN202020389216 U CN 202020389216U CN 211579608 U CN211579608 U CN 211579608U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The utility model provides a low pressure commutation switch, be in including shell and setting A looks input, B looks input, C looks input and three output on the shell still include change over switch, gangbar and contact, the gangbar with change over switch swing joint, the contact includes static contact and moving contact. The utility model provides a low pressure commutation switch, after the commutation work, former A looks load adjustment is the power supply of C looks, former B looks load adjustment is the power supply of A looks, former C looks load adjustment is the power supply of B looks, when distribution transformer low pressure side has multiplexed output, through low pressure commutation switch dynamic adjustment three-phase load, realize the unbalanced adjustment of distribution transformer low pressure side three-phase, and this adjustment mode does not change the phase sequence of three phase equipment, three phase equipment still can normally work, single phase equipment can be in the condition adjustment phase place that does not change the circuit wiring, realized fast, the purpose of nimble adjustment, and the work efficiency is improved, and staff's work load has been alleviateed.
Description
Technical Field
The utility model relates to a low pressure electrical equipment field, more specifically relates to a low pressure commutation switch.
Background
The low-voltage side load of the distribution transformer for supplying power to residential buildings at present generally has a three-phase imbalance condition. The reason for causing the unbalanced three-phase load on the low-voltage side of the distribution transformer is that the residential load is generally a single-phase load, and the three-phase load is unbalanced due to uneven distribution of the single-phase load or difference of synchronism of electricity consumption of the single-phase load. The loss of a low-voltage line is increased due to unbalanced three-phase load of the distribution transformer, the output power of the transformer cannot be fully exerted, the neutral point on the low-voltage side drifts phase voltage asymmetrically, and the risk of burning out of neutral cables and faults is increased.
At present, measures for processing three-phase load unbalance on a low-voltage side of a transformer are as follows: 1. the single-phase load of the corresponding low-voltage line is adjusted, and the single-phase users on the phase line with heavier load are adjusted to the phase line with lighter load. 2. The adjustment result of the single-phase load is not ideal and accurate due to the non-periodic adjustment of the power utilization time of the user. 3. For a three-phase four-wire load user, the three-phase balance degree is determined by the internal load of the user, and the adjustment work cannot be implemented. 4. The mode of adjusting the load of a single-phase user is adopted, three-phase load imbalance is improved, after adjustment, when the load changes or seasonally changes, imbalance can occur repeatedly, adjustment is often needed again, the workload is large, and the efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem that present staff adjustment three-phase load work load is big, work efficiency is low, provide a low pressure commutation switch.
In order to solve the technical problem, the technical scheme of the utility model as follows:
a low-voltage phase-change switch comprises a shell, an A-phase input end, a B-phase input end, a C-phase input end, three output ends, a change-over switch, a linkage rod and a contact, wherein the A-phase input end, the B-phase input end, the C-phase input end and the three output ends are arranged on the shell; wherein the content of the first and second substances,
the number of the fixed contacts is six, namely a first fixed contact, a second fixed contact, a third fixed contact, a fourth fixed contact, a fifth fixed contact and a sixth fixed contact; the first static contact is electrically connected with the phase-A input end, the second static contact is electrically connected with the phase-B input end, the third static contact is electrically connected with the phase-C input end, the fourth static contact is electrically connected with the phase-C input end, the fifth static contact is electrically connected with the phase-A input end, and the sixth static contact is electrically connected with the phase-B input end;
the number of the moving contacts is three, and the three moving contacts are respectively a first moving contact, a second moving contact and a third moving contact; the first moving contact, the second moving contact and the third moving contact are respectively electrically connected with three output ends of the low-voltage phase-change switch;
the static contact is fixedly arranged in the shell, and the moving contact is fixedly arranged on the linkage rod; the first moving contact is respectively adjacent to the first fixed contact and the fourth fixed contact, the second moving contact is respectively adjacent to the second fixed contact and the fifth fixed contact, and the third moving contact is respectively adjacent to the third fixed contact and the sixth fixed contact; when the first moving contact and the first fixed contact are closed, the second moving contact and the second fixed contact as well as the third moving contact and the third fixed contact are closed; when the linkage rod moves transversely to close the first moving contact and the fourth fixed contact, the second moving contact and the fifth fixed contact as well as the third moving contact and the sixth fixed contact are closed.
In the above scheme, during normal operation, the first moving contact, the second moving contact and the third moving contact are respectively connected with the first static contact, the second static contact and the third static contact, the output end is connected with a cable or a wire to supply power to a load, the phase sequence is ABC, and the phase sequence is positive; when the phase-change operation is performed, the first moving contact, the second moving contact and the third moving contact are respectively communicated with the fourth static contact, the fifth static contact and the sixth static contact, the output end of the first moving contact is connected with a cable or a wire to supply power to a load, the phase sequence is CAB, and the phase sequence is positive sequence. The staff makes the gangbar remove through change over switch to make the moving contact on the gangbar and different static contacts closed, realize the commutation. After the phase change operation, the original load of the A phase is adjusted to be the C phase power supply, the original load of the B phase is adjusted to be the A phase power supply, the original load of the C phase is adjusted to be the B phase power supply, when the low-voltage side of the distribution transformer has multi-path output, as long as the phase change switch is installed on the low-voltage outgoing line switch, the three-phase load can be dynamically adjusted by simply calculating the load condition of each low-voltage outgoing line, the three-phase unbalanced adjustment of the low-voltage side of the distribution transformer is realized, and the phase sequence of the three-phase equipment is not changed by the adjusting mode, the three-phase equipment can still normally work, the phase of the single-phase equipment can be adjusted under the condition of not changing the line wiring, the purpose of quick and flexible.
Preferably, one side of the linkage rod is provided with a displacement gear, and the periphery of the outer side of the change-over switch is provided with a gear; the displacement gear is meshed with the gear, and when the change-over switch rotates, the gear on the outer side of the change-over switch drives the displacement gear on the linkage rod to enable the linkage rod to move transversely.
In the above scheme, when the change-over switch rotates, the gear outside the change-over switch drives the displacement gear on the linkage rod to transversely move the linkage rod, so that the movable contact is moved to a corresponding position, and the phase change function is realized.
Preferably, the linkage rod adopts an insulating structure.
In the scheme, the insulating linkage rod avoids short circuit, and the independent work of each moving contact is realized.
Preferably, the input end of the low-voltage phase-change switch is provided with a power supply side wiring terminal, the first fixed contact, the second fixed contact and the third fixed contact are electrically connected with one end of the power supply side wiring terminal of the phase a input end, the phase B input end and the phase C input end respectively, and the other end of the power supply side wiring terminal is electrically connected with the output end of the low-voltage air circuit breaker.
In the above scheme, the power supply side wiring terminal is connected with the output terminal of the low-voltage air circuit breaker and passes through load current.
Preferably, three output ends of the low-voltage phase-change switch are provided with load side connection terminals, the first moving contact, the second moving contact and the third moving contact are electrically connected with one ends of the load side connection terminals respectively, and the other ends of the load side connection terminals are electrically connected with the load.
In the scheme, the terminal of the load side is directly connected with the load, and the phase position set by the low-voltage phase change switch is output.
Preferably, the change-over switch is provided with three gears which are normal, disconnected and phase-changed respectively;
when the device works in a normal gear, the first moving contact and the first fixed contact, the second moving contact and the second fixed contact, and the third moving contact and the third fixed contact are all closed;
when the movable contact works in an open gear, the movable contact and the fixed contact are not closed;
when the motor works in a phase-shifting gear, the first moving contact and the fourth fixed contact, the second moving contact and the fifth fixed contact, and the third moving contact and the sixth fixed contact are all closed.
In the scheme, a worker can select different gears to perform phase change adjustment according to actual conditions; meanwhile, the working state of the low-voltage phase-change switch can be clearly mastered by the staff according to the gear identification.
Preferably, the change-over switch is provided with a change-over switch positioning mechanism, and the change-over switch positioning mechanism is used for shifting and positioning.
In the scheme, the gear shifting function of the change-over switch is realized through the change-over switch positioning mechanism.
Preferably, the change-over switch positioning mechanism comprises a shell, a compression spring, a stroke change-over wheel, a positioning sheet and a switch turntable; one end of the compression spring is fixed on the inner wall of the shell, and the other end of the compression spring is movably connected with the stroke conversion wheel through a telescopic rod; the positioning sheet is provided with a plurality of positioning grooves for clamping the stroke conversion wheel; the switch turntable is fixedly connected with the positioning plate.
In the scheme, the change-over switch positioning mechanism mainly pushes the telescopic rod through the compression spring, so that the stroke change-over wheel is stopped in the corresponding groove of the positioning sheet and is matched with the stroke of the moving contact, and the three-gear quick switching and positioning of the low-voltage phase change switch are realized.
Preferably, the number of the positioning grooves is three, namely a normal positioning groove, a disconnection positioning groove and a phase change positioning groove.
In the above scheme, the normal positioning groove, the disconnection positioning groove and the phase change positioning groove respectively correspond to the normal gear, the disconnection gear and the phase change gear of the change-over switch.
Preferably, a travel limiter is further arranged on the positioning sheet.
In the scheme, the travel limiter limits deflection of the positioning sheet, and stability and reliability of the positioning mechanism of the change-over switch are improved.
Compared with the prior art, the utility model discloses technical scheme's beneficial effect is:
the utility model provides a low pressure commutation switch, during normal work, first moving contact, second moving contact and third moving contact are connected with first static contact, second static contact and third static contact respectively, and the output is connected with cable or wire, supplies power to the load, and the phase place is ABC in proper order, and the phase sequence is positive order; when the phase-change operation is performed, the first moving contact, the second moving contact and the third moving contact are respectively communicated with the fourth static contact, the fifth static contact and the sixth static contact, the output end of the first moving contact is connected with a cable or a wire to supply power to a load, the phase sequence is CAB, and the phase sequence is positive sequence. The staff makes the gangbar remove through change over switch to make the moving contact on the gangbar and different static contacts closed, realize the commutation. After the phase change operation, the original load of the A phase is adjusted to be the C phase power supply, the original load of the B phase is adjusted to be the A phase power supply, the original load of the C phase is adjusted to be the B phase power supply, when the low-voltage side of the distribution transformer has multi-path output, as long as the phase change switch is installed on the low-voltage outgoing line switch, the three-phase load can be dynamically adjusted by simply calculating the load condition of each low-voltage outgoing line, the three-phase unbalanced adjustment of the low-voltage side of the distribution transformer is realized, and the phase sequence of the three-phase equipment is not changed by the adjusting mode, the three-phase equipment can still normally work, the phase of the single-phase equipment can be adjusted under the condition of not changing the line wiring, the purpose of quick and flexible.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the circuit of the present invention;
FIG. 3 is a schematic diagram of an embodiment of the present invention;
fig. 4 is a schematic structural view of the transfer switch positioning mechanism of the present invention;
wherein: 1. a housing; 2. a transfer switch; 21. a gear; 3. a linkage rod; 31. a displacement gear; 4. a contact; 41. static contact; 411. a first fixed contact; 412. a second fixed contact; 413. a third static contact; 414. A fourth static contact; 415. a fifth static contact; 416. a sixth static contact; 42. a moving contact; 421. a first moving contact; 422. a second moving contact; 423. a third moving contact; 5. a power supply side connection terminal; 6. load side wiring terminals; 7. a transfer switch positioner; 71. a housing; 72. a compression spring; 73. a stroke conversion wheel; 74. Positioning plates; 75. a switch turntable; 76. positioning a groove; 761. a normal positioning groove; 762. disconnecting the positioning groove; 763. A phase change positioning groove; 77. a travel limiter.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.
As shown in fig. 1-2, a low-voltage phase-change switch comprises a housing 1, an a-phase input end, a B-phase input end, a C-phase input end, three output ends, a change-over switch 2, a linkage rod 3 and a contact 4, wherein the a-phase input end, the B-phase input end, the C-phase input end and the three output ends are arranged on the housing 1, the linkage rod 3 is movably connected with the change-over switch 2, and the contact 4 comprises a fixed contact 41 and a movable contact 42; wherein the content of the first and second substances,
six static contacts 41 are respectively a first static contact 411, a second static contact 412, a third static contact 413, a fourth static contact 414, a fifth static contact 415 and a sixth static contact 416; the first fixed contact 411 is electrically connected to the phase a input end, the second fixed contact 412 is electrically connected to the phase B input end, the third fixed contact 413 is electrically connected to the phase C input end, the fourth fixed contact 414 is electrically connected to the phase C input end, the fifth fixed contact 415 is electrically connected to the phase a input end, and the sixth fixed contact 416 is electrically connected to the phase B input end;
three moving contacts 42 are provided, which are a first moving contact 421, a second moving contact 422 and a third moving contact 423 respectively; the first moving contact 421, the second moving contact 422 and the third moving contact 423 are electrically connected to three output terminals of the low-voltage phase-change switch, respectively;
the fixed contact 41 is fixedly arranged in the shell 1, and the moving contact 42 is fixedly arranged on the linkage rod 3; the first movable contact 421 is respectively adjacent to the first fixed contact 411 and the fourth fixed contact 414, the second movable contact 422 is respectively adjacent to the second fixed contact 412 and the fifth fixed contact 415, and the third movable contact 423 is respectively adjacent to the third fixed contact 413 and the sixth fixed contact 416; when the first movable contact 421 and the first fixed contact 411 are closed, the second movable contact 422 and the second fixed contact 412, and the third movable contact 423 and the third fixed contact 413 are closed; when the linkage rod 3 moves laterally to close the first movable contact 421 and the fourth fixed contact 414, the second movable contact 422 and the fifth fixed contact 415, and the third movable contact 423 and the sixth fixed contact 416 are all closed.
In the implementation process, during normal operation, the first movable contact 421, the second movable contact 422, and the third movable contact 423 are respectively connected to the first fixed contact 411, the second fixed contact 412, and the third fixed contact 413, the output end is connected to a cable or a wire, and supplies power to a load, and the phase sequence is ABC, and the phase sequence is positive; when the phase change operation is performed, the first movable contact 421, the second movable contact 422, and the third movable contact 423 are respectively connected to the fourth fixed contact 414, the fifth fixed contact 415, and the sixth fixed contact 416, the output end is connected to a cable or a wire, and the power is supplied to the load, and the phase sequence is CAB, and the phase sequence is positive. The staff moves the linkage rod 3 through the change-over switch 2, so that the moving contact 42 on the linkage rod 3 is closed with different fixed contacts 41, and phase change is realized. After the phase change operation, the original load of the A phase is adjusted to be the C phase power supply, the original load of the B phase is adjusted to be the A phase power supply, the original load of the C phase is adjusted to be the B phase power supply, when the low-voltage side of the distribution transformer has multi-path output, as long as the phase change switch is installed on the low-voltage outgoing line switch, the three-phase load can be dynamically adjusted by simply calculating the load condition of each low-voltage outgoing line, the three-phase unbalanced adjustment of the low-voltage side of the distribution transformer is realized, and the phase sequence of the three-phase equipment is not changed by the adjusting mode, the three-phase equipment can still normally work, the phase of the single-phase equipment can be adjusted under the condition of not changing the line wiring, the purpose of quick and flexible.
More specifically, a displacement gear 31 is arranged on one side of the linkage rod 3, and a gear is arranged on the periphery of the outer side of the change-over switch 2; the displacement gear 31 is meshed with the gear, and when the change-over switch 2 rotates, the gear on the outer side of the change-over switch 2 drives the displacement gear 31 on the linkage rod 3 to enable the linkage rod 3 to move transversely.
In the implementation process, when the change-over switch 2 rotates, the gear on the outer side of the change-over switch 2 drives the displacement gear 31 on the linkage rod 3 to make the linkage rod 3 move transversely, so that the movable contact 42 moves to a corresponding position, and the phase change function is realized.
More specifically, the linkage rod 3 adopts an insulating structure.
In the implementation process, the insulating linkage rod 3 avoids short circuit, and the independent work of each moving contact 42 is realized.
More specifically, as shown in fig. 3, power-side connection terminals 5 are disposed at the input ends of the low-voltage phase-change switch, the first fixed contact 411, the second fixed contact 412, and the third fixed contact 413 are electrically connected to one ends of the power-side connection terminals 5 at the phase a input end, the phase B input end, and the phase C input end, respectively, and the other end of the power-side connection terminal 5 is electrically connected to the output end of the low-voltage air circuit breaker.
In the implementation, the power supply side connection terminal 5 is connected to an output terminal of the low-voltage air circuit breaker and passes a load current.
More specifically, three output ends of the low-voltage phase-change switch are all provided with a load side connection terminal 6, the first moving contact 421, the second moving contact 422 and the third moving contact 423 are respectively electrically connected with one end of the load side connection terminal 6, and the other end of the load side connection terminal 6 is electrically connected with a load.
In the implementation process, the load side connection terminal 6 is directly connected with the load, and the phase set by the low-voltage phase-change switch is output.
More specifically, the change-over switch 2 is provided with three gears, namely normal, off and phase change;
when the device works in a normal gear, the first movable contact 421 and the first fixed contact 411, the second movable contact 422 and the second fixed contact 412, and the third movable contact 423 and the third fixed contact 413 are all closed;
when the device works in an open gear, the moving contact 42 and the fixed contact 41 are not closed;
when the device works in a phase-shifting range, the first movable contact 421 and the fourth fixed contact 414, the second movable contact 422 and the fifth fixed contact 415, and the third movable contact 423 and the sixth fixed contact 416 are all closed.
In the implementation process, workers can select different gears to perform phase change adjustment according to actual conditions; meanwhile, the working state of the low-voltage phase-change switch can be clearly mastered by the staff according to the gear identification.
More specifically, as shown in fig. 4, the change-over switch 2 is provided with a change-over switch positioning mechanism 7, and the change-over switch positioning mechanism 7 is used for shift positioning.
In the implementation process, the gear shifting function of the change-over switch is realized through the change-over switch positioning mechanism 7.
More specifically, the switch positioning mechanism 7 includes a housing 71, a compression spring 72, a stroke switching wheel 73, a positioning piece 74, and a switch dial 75; one end of the compression spring 72 is fixed on the inner wall of the housing 71, and the other end of the compression spring 72 is movably connected with the stroke conversion wheel 73 through a telescopic rod; the positioning sheet 74 is provided with a plurality of positioning grooves 76, and the positioning grooves 76 are used for clamping the stroke conversion wheel 73; the switch dial 75 is fixedly connected with the positioning plate 74.
In the implementation process, the positioning mechanism 7 of the change-over switch mainly pushes the telescopic rod through the compression spring 72, so that the stroke change-over wheel 73 is stopped in the corresponding groove of the positioning piece 74 and is matched with the stroke of the movable contact 42, and the three-gear quick switching and positioning of the low-voltage phase change switch are realized.
More specifically, there are three positioning slots 76, namely a normal positioning slot 761, a disconnection positioning slot 762 and a commutation positioning slot 763.
In the implementation process, the normal positioning slot 761, the disconnection positioning slot 762 and the commutation positioning slot 763 correspond to the normal gear, the disconnection gear and the commutation gear of the change-over switch respectively.
More specifically, the positioning plate 74 is further provided with a stroke limiter 77.
In practice, the travel stop 77 limits the deflection of the positioning tab 74, improving the stability and reliability of the diverter switch positioning mechanism 7.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. 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 low-voltage phase-change switch comprises a shell (1), and an A-phase input end, a B-phase input end, a C-phase input end and three output ends which are arranged on the shell (1), and is characterized by further comprising a change-over switch (2), a linkage rod (3) and a contact (4), wherein the linkage rod (3) is movably connected with the change-over switch (2), and the contact (4) comprises a static contact (41) and a moving contact (42); wherein the content of the first and second substances,
six static contacts (41) are respectively a first static contact (411), a second static contact (412), a third static contact (413), a fourth static contact (414), a fifth static contact (415) and a sixth static contact (416); the first static contact (411) is electrically connected to the phase-a input end, the second static contact (412) is electrically connected to the phase-B input end, the third static contact (413) is electrically connected to the phase-C input end, the fourth static contact (414) is electrically connected to the phase-C input end, the fifth static contact (415) is electrically connected to the phase-a input end, and the sixth static contact (416) is electrically connected to the phase-B input end;
the number of the moving contacts (42) is three, and the three moving contacts are respectively a first moving contact (421), a second moving contact (422) and a third moving contact (423); the first moving contact (421), the second moving contact (422) and the third moving contact (423) are respectively electrically connected with three output ends of the low-voltage phase-change switch;
the static contact (41) is fixedly arranged in the shell (1), and the moving contact (42) is fixedly arranged on the linkage rod (3); the first movable contact (421) is respectively adjacent to the first fixed contact (411) and the fourth fixed contact (414), the second movable contact (422) is respectively adjacent to the second fixed contact (412) and the fifth fixed contact (415), and the third movable contact (423) is respectively adjacent to the third fixed contact (413) and the sixth fixed contact (416); when the first movable contact (421) and the first fixed contact (411) are closed, the second movable contact (422) and the second fixed contact (412), and the third movable contact (423) and the third fixed contact (413) are closed; when the linkage rod (3) moves transversely to close the first movable contact (421) and the fourth fixed contact (414), the second movable contact (422) and the fifth fixed contact (415), and the third movable contact (423) and the sixth fixed contact (416) are closed.
2. The low-voltage phase-change switch according to claim 1, characterized in that a displacement gear (31) is arranged on one side of the linkage rod (3), and a gear (21) is arranged on the periphery of the outer side of the change-over switch (2); the displacement gear (31) is meshed with the gear (21), and when the change-over switch (2) rotates, the gear (21) on the outer side of the change-over switch (2) drives the displacement gear (31) on the linkage rod (3) to enable the linkage rod (3) to move transversely.
3. A low-voltage phase-change switch according to claim 1, characterized in that the linkage rod (3) is of an insulating structure.
4. The low-voltage phase-change switch according to claim 1, wherein the input terminals of the low-voltage phase-change switch are each provided with a power-side terminal (5), the first stationary contact (411), the second stationary contact (412) and the third stationary contact (413) are electrically connected to one end of the power-side terminal (5) of the phase-a input terminal, the phase-B input terminal and the phase-C input terminal, respectively, and the other end of the power-side terminal (5) is electrically connected to the output terminal of the low-voltage air circuit breaker.
5. The low-voltage phase-change switch according to claim 1, wherein three output terminals of the low-voltage phase-change switch are each provided with a load-side connection terminal (6), the first movable contact (421), the second movable contact (422) and the third movable contact (423) are electrically connected to one end of the load-side connection terminal (6), and the other end of the load-side connection terminal (6) is electrically connected to a load.
6. A low-voltage phase-change switch according to claim 1, characterized in that said change-over switch (2) is provided with three gears, normal, off and phase-change respectively;
when the device works in a normal gear, the first moving contact (421) and the first fixed contact (411), the second moving contact (422) and the second fixed contact (412), and the third moving contact (423) and the third fixed contact (413) are closed;
when the movable contact (42) works in an open gear, the movable contact and the fixed contact (41) are not closed;
when the device works in a phase-shifting gear, the first movable contact (421) and the fourth fixed contact (414), the second movable contact (422) and the fifth fixed contact (415), and the third movable contact (423) and the sixth fixed contact (416) are all closed.
7. A low-voltage phase-change switch according to claim 6, characterized in that the change-over switch (2) is provided with a change-over switch positioning mechanism (7), and the change-over switch positioning mechanism (7) is used for gear shift positioning.
8. The low-voltage phase-change switch according to claim 7, characterized in that the switch positioning mechanism (7) comprises a housing (71), a compression spring (72), a stroke switching wheel (73), a positioning plate (74) and a switch rotary disc (75); one end of the compression spring (72) is fixed on the inner wall of the shell (71), and the other end of the compression spring (72) is movably connected with the stroke conversion wheel (73) through a telescopic rod; the positioning sheet (74) is provided with a plurality of positioning grooves (76), and the positioning grooves (76) are used for clamping the stroke conversion wheel (73); the switch rotary disc (75) is fixedly connected with the positioning sheet (74).
9. The low-voltage phase-change switch according to claim 8, wherein there are three positioning slots (76), namely a normal positioning slot (761), a disconnecting positioning slot (762) and a phase-change positioning slot (763).
10. The low-voltage phase-change switch according to claim 8, wherein the positioning plate (74) is further provided with a travel limiter (77).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020389216.2U CN211579608U (en) | 2020-03-24 | 2020-03-24 | Low-voltage phase-change switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020389216.2U CN211579608U (en) | 2020-03-24 | 2020-03-24 | Low-voltage phase-change switch |
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| CN211579608U true CN211579608U (en) | 2020-09-25 |
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| CN202020389216.2U Active CN211579608U (en) | 2020-03-24 | 2020-03-24 | Low-voltage phase-change switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113991663A (en) * | 2021-11-10 | 2022-01-28 | 国网浙江省电力有限公司经济技术研究院 | Movable phase-changing device and vehicle-mounted mobile substation |
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2020
- 2020-03-24 CN CN202020389216.2U patent/CN211579608U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113991663A (en) * | 2021-11-10 | 2022-01-28 | 国网浙江省电力有限公司经济技术研究院 | Movable phase-changing device and vehicle-mounted mobile substation |
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