CN109449018B - On-load tap-changer - Google Patents
On-load tap-changer Download PDFInfo
- Publication number
- CN109449018B CN109449018B CN201811576611.5A CN201811576611A CN109449018B CN 109449018 B CN109449018 B CN 109449018B CN 201811576611 A CN201811576611 A CN 201811576611A CN 109449018 B CN109449018 B CN 109449018B
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- plate
- converter
- transformer
- selector
- drives
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- 230000005540 biological transmission Effects 0.000 claims abstract description 33
- 238000010079 rubber tapping Methods 0.000 claims abstract description 6
- 230000007246 mechanism Effects 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000008033 biological extinction Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000033001 locomotion Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
- H01H3/264—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor using a travelling nut mechanism
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
Abstract
The invention discloses an on-load tapping switch, which comprises a motor, a main support plate, a linear reciprocating transmission system, a selector system, a gun stock system and a converter system, wherein the main support plate is arranged on the main support plate; the switch is provided with at least one group of selector system and converter system, the selector system and the converter system are respectively arranged at two sides of the same main supporting plate, the motor drives the selector system through a linear reciprocating transmission system, and the motor also drives the gun machine system to move, and the gun machine system drives the converter system to move; the invention has the advantages that: the horizontal installation can reduce the distance from the tapping lead of the transformer to the switch, the lead length is consistent, the balance of the direct current resistance of the transformer is ensured, the installation volume is small, the design size of the transformer is reduced, and the design cost of the transformer is reduced. The invention changes the switching of the vacuum arc-extinguishing chamber, the switching process is used for arc extinction in the vacuum arc-extinguishing chamber, no pollution is caused to transformer oil, maintenance is avoided, and the service life of the transformer is prolonged.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to a switch, and more particularly relates to an on-load tap-changer for uninterrupted switching between different winding taps of an adjustable transformer.
Background
The on-load tap changer is commonly applied to the voltage regulating transformer, but the traditional column type on-load tap changer is arranged at the side part of the transformer, and because the volume of the transformer is increased at one side of a transformer coil, the connection between a lead wire of the transformer coil and a switch contact is not facilitated, the manufacturing cost of the transformer is also improved due to the complicated lead wire, and the insulating property of the transformer is not facilitated.
The traditional column type on-load voltage regulating switch adopts the oil arc extinguishing working principle, and after the switch is used for a long time, serious pollution is generated to transformer oil in an oil chamber of the switch, and periodic maintenance is needed to ensure long-term normal operation of the switch and a transformer.
The transverse switch in the market is limited by the structure, the volume is relatively large, the requirement on the volume of the transformer box body is large, and the cost of the transformer is increased intangibly.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide the tapping switch which is arranged below a transformer box cover or a cover, is transversely arranged above a transformer winding coil, integrates a transmission mechanism of a slow screw transmission and a fast switching system, avoids the defects of the known traditional on-load switch, and has the characteristics of smaller volume, simple structure, convenient installation, safer and favorable price. In order to achieve the aim of the invention, the invention adopts the following technical scheme:
an on-load tap-changer, characterized by: the on-load tap-changer is arranged below a transformer box cover or a cover, and is transversely arranged above a transformer winding coil; the main support plate 2 is fixed below the connecting plate 1.2, and the connecting plate 1.2 is connected with the transformer box cover;
the on-load tapping switch structurally comprises a motor 1, a main support plate 2, a linear reciprocating transmission system 3, a selector system 4, a gun stock system 5 and a converter system 6; the switch is provided with at least one group of selector system 4 and converter system 6, and is transversely arranged along the long side direction of the switch, the selector system 4 and the converter system 6 are respectively arranged on two sides of the same main supporting plate 2, the motor 1 drives the selector system 4 through the linear reciprocating transmission system 3, the motor 1 simultaneously drives the gun machine system 5 to move, and the gun machine system 5 drives the converter system 6 to move.
The bolt system 5 has the structure that: the main transmission shaft 1.3 and the eccentric block 5.1 coaxially rotate, the eccentric block 5.1 is arranged in a groove of the upper slide box 5.2, the main transmission shaft 1.3 drives the upper slide box 5.2 to move along the guide rail 5.4 when driving the eccentric block to rotate, the lower slide box 5.6 is provided with the guide rail 5.4, the guide rail 5.4 is fixed on the bolt mechanism fixing plate 5.8, the outer sides of the guide rails are sleeved with the compression springs 5.3, the upper slide box 5.2 and the lower slide box 5.6 are respectively provided with a semicircular clamping plate 5.21 which is sleeved on the outer sides of the guide rails and is abutted with two ends of the compression springs, namely, the upper slide box 5.2, the lower slide box 5.6 and the guide rail 5.4 are connected in a concentric circle structure along the radial direction of the guide rail;
the side wall 5.7 is arranged on the side surface of the upper sliding box, the outer side of the lower sliding box 5.6 is in butt joint with the limiting plate 5.5.1, and the limiting plate 5.5.1 is arranged on the rotating shaft 5.10;
the structure of the selector system 4 is as follows: the screw connecting sleeve 4.1 is matched with the screw rod 3.3, the movable support 4.2 is fixed with the screw connecting sleeve 4.1, the movable contact 4.3 is fixed on the movable support 4.2, the front end of the movable contact 4.3 is abutted with two adjacent contacts of the fixed contact, and the rear end of the movable contact 4.3 is respectively abutted with a copper rod serving as a public end at any moment; an insulating auxiliary contact 4.4.6 is arranged between every two adjacent rows of contacts, and the static contact is at least one row of horizontal or longitudinal distribution;
the converter system 6 is structured as follows: the lower slide box 5.6 of the gun stock system is connected with the connecting rod 6.1; the connecting rod 6.1 is connected with the first insulating time sequence plate 6.4.1 and the second insulating time sequence plate 6.4.2 through the connecting plate 6.3, a converter shaft 6.5 is arranged between the first insulating time sequence plate 6.4.1 and the second insulating time sequence plate 6.4.2, a rotating shaft is arranged in the middle of the converter pull plate 6.6, one end of the rotating shaft is sleeved on the converter shaft 6.5, and the other end of the rotating shaft is in abutting connection with a converter contact; grooves are formed in the first insulating time sequence plate 6.4.1 and the second insulating time sequence plate 6.4.2, and the on-off switch main 6.9.1 and the auxiliary time sequence block 6.9.2 of the vacuum arc-extinguishing chamber are sleeved in the grooves.
The linear reciprocating transmission system 3 is a screw driving system, and the screw driving system is structured as follows: the motor drives the main transmission shaft 1.3 to rotate, the main transmission shaft 1.3 drives the bevel gear 3.2 to rotate through the gear set, and the bevel gear 3.2 is meshed with the lead screw 3.3; the change of the motor revolution and the screw revolution is realized through the change of the tooth number of the gear set, so as to drive the selector system 4 to transversely convert and connect between the fixed selector contacts.
The linear reciprocating transmission system 3 is one of a rack transmission system, a screw transmission system and a geneva mechanism system.
The invention has the advantages that: the horizontal installation can reduce the distance from the tapping lead of the transformer to the switch, the lead length is consistent, the balance of the direct current resistance of the transformer is ensured, the installation volume is small, the design size of the transformer is reduced, and the design cost of the transformer is reduced. The invention changes the switching of the vacuum arc-extinguishing chamber, the switching process is used for arc extinction in the vacuum arc-extinguishing chamber, no pollution is caused to transformer oil, maintenance is avoided, and the service life of the transformer is prolonged.
Drawings
FIG. 1-1 is a perspective view of the present invention;
FIGS. 1-2 are perspective views of another angle of the present invention;
FIG. 2 is a schematic diagram of the motor and connection plate positions;
FIG. 3 is a schematic diagram of a bolt face system;
FIG. 4 is a schematic diagram of a lead screw drive system;
FIG. 5 is a schematic diagram of a selector system architecture;
FIG. 6 is a schematic diagram of a converter system;
fig. 7 is a schematic diagram of the connection of the upper slide box, the lower slide box and the guide rail in a concentric circle structure.
Detailed Description
The invention will be described in detail below with reference to the accompanying drawings, as shown in the drawings, the invention comprises a motor 1, a main support plate 2, and a linear driving system 3, wherein the linear driving system 3 of the embodiment is a screw driving system, a selector system 4, a bolt system 5 and a converter system 6; the switch is provided with at least one group of selector system 4 and converter system 6, the selector system 4 and the converter system 6 are respectively arranged at two sides of the same main support plate 2, the motor 1 drives the selector system 4 through the screw driving system 3, the motor 1 simultaneously drives the gun machine system 5 to move, and the gun machine system 5 drives the converter system 6 to move;
as shown in fig. 4, the screw driving system is configured as follows: the motor drives the main transmission shaft 1.3 to rotate, the main transmission shaft 1.3 drives the bevel gear 3.2 to rotate through the gear set 3.1, and the bevel gear 3.2 is meshed with the lead screw 3.3; the change of the motor revolution and the screw revolution is realized through the change of the tooth number of the gear set, so as to drive the selector system 4 to transversely convert and connect between the fixed selector contacts;
as shown in fig. 3, the bolt face system 5 has the following structure: the main transmission shaft 1.3 and the eccentric block 5.1 coaxially rotate, the eccentric block 5.1 is arranged in a groove of the upper slide box 5.2, the main transmission shaft 1.3 drives the upper slide box 5.2 to move along the guide rail 5.4 when driving the eccentric block to rotate, the lower slide box 5.6 is provided with the guide rail 5.4, the guide rail 5.4 is fixed on the bolt mechanism fixing plate 5.8, the outer sides of the guide rails are sleeved with the compression springs 5.3, the upper slide box 5.2 and the lower slide box 5.6 are respectively provided with the semicircular clamping plates 5.21 which are sleeved on the outer sides of the guide rails and are abutted with two ends of the compression springs, namely, as shown in fig. 7, along the radial direction of the guide rail, the semicircular clamping plates 5.21 of the upper slide box 5.2, the semicircular clamping plates 5.21 of the lower slide box 5.6 and the guide rail 5.4 are connected in a concentric circle structure;
the side wall 5.7 is arranged on the side surface of the upper sliding box, the outer side of the lower sliding box 5.6 is in butt joint with the limiting plate 5.5.1, and the limiting plate 5.5.1 is arranged on the rotating shaft 5.10;
when the upper slide box 5.2 moves along the guide rail 5.4, the semicircular clamping plate 5.21 pushes the compression spring 5.3, and at the moment, the lower slide box 5.6 is blocked by the limiting plate and cannot move, one end of the compression spring 5.3 is blocked, and therefore the compression spring 5.3 compresses and stores energy. When the upper slide cassette moves the side arm 5.7 to the corresponding limit plate 5.5.1 position, the side arm 5.7 pushes the corresponding limit plate 5.5.1 to rotate along the fixed rotating shaft 5.10, so that the upper slide cassette is separated from the lower slide cassette 5.6, and the lower slide cassette 5.6 is released.
The principle of the bolt face system 5 is: the bolt face mechanism system is exemplified by clockwise: the main transmission shaft 1.3 drives the eccentric block 5.1 to rotate, the eccentric block 5.1 is arranged in a groove of the upper slide box 5.2, the guide rail 5.4 is fixed on the bolt mechanism fixing plate 5.8, the outer side of the guide rail is sleeved with the compression spring 5.3, the upper slide box 5.2, the lower slide box 5.6 and the guide rail 5.4 are connected in a concentric circle structure along the radial direction of the guide rail and can do linear motion along the guide rail 5.4, the outer side of the lower slide box 5.6 is abutted with the limit plate 5.5.1, the eccentric block rotates to push the upper slide box 5.2 in the bolt mechanism to move rightwards along the guide rail 5.4 to compress the compression spring 5.3, the lower slide block 5.6 is kept at the original position due to the fact that the limit plate 5.5.1 locks the lower slide block 5.6, when the compression spring 5.3 is compressed to the limit position, the upper slide box 5.7 pushes the limit plate 5.1 away, the limit plate 5.1 is separated from the lower slide block 5.6, and the compression spring 5.3 is released to drive the hook 5.6 to do rapid movement rightwards. After the action is completed, the lower slider 5.6 moves to a new locking position, and the left limiting plate 5.5.2 re-locks the lower slider under the action of the return spring 5.9, so that preparation is made for the next action. The reverse operation is the same as the above operation and is opposite. The gun bolt mechanism is a classical transmission mechanism, but is mainly used for converting linear reciprocating motion into circular motion in the on-load tap-changer in the prior art.
As shown in fig. 5, the structure of the selector system 4 is as follows: the screw connecting sleeve 4.1 is matched with the screw rod 3.3, the movable support 4.2 is fixed with the screw connecting sleeve 4.1, the movable contact 4.3 is of a clamping type and is fixed on the movable support 4.2, the front end of the movable contact 4.3 is meshed with two adjacent contacts of the fixed contact at the same time, and the rear end of the movable contact 4.3 is respectively meshed with a copper rod serving as a public end at all times; an insulating auxiliary contact 4.4.6 is arranged between every two adjacent contacts;
the principle of the selector system 4 is: the movable support 4.2 is driven by the screw connecting sleeve 4.1 to do transverse reciprocating motion, the movable contact 4.3 is of a clamping piece type, the front end is simultaneously meshed with two adjacent nodes 4.4.1-4.4.2,4.4.2-4.4.3 and … … of the fixed contact, the rear end is respectively meshed with a copper rod 4.5.1,4.5.2 serving as a common end at the moment, and an insulating auxiliary contact 4.4.6 is arranged between each row of adjacent two contacts.
The converter system 6 is structured as follows: the lower slide box 5.6 of the gun stock system is connected with the connecting rod 6.1; the connecting rod 6.1 is connected with the first insulating time sequence plate 6.4.1 and the second insulating time sequence plate 6.4.2 through the connecting plate 6.3, a converter shaft 6.5 is arranged between the first insulating time sequence plate 6.4.1 and the second insulating time sequence plate 6.4.2, a rotating shaft is arranged in the middle of the converter pull plate 6.6, one end of the rotating shaft is sleeved on the converter shaft 6.5, and the other end of the rotating shaft is in abutting connection with a converter contact; the first insulating time sequence plate 6.4.1 and the second insulating time sequence plate 6.4.2 are provided with grooves, and the on-off switch of the vacuum arc-extinguishing chamber is sleeved in the grooves.
The converter system 6 is powered by the bolt system 5, the slide box 5.6 of the bolt system is connected with the connecting rod 6.1, the connecting rod 6.1 is connected with the linear slide rails 6.2 and the linear guide rail connecting plates 6.3 distributed at the left end and the right end of the main support plate selector system, and the linear slide rails are used for ensuring the stability and the accuracy of linear motion when the main support plate selector system reciprocates. The connecting plate is connected with the first and second insulating timing plates 6.4.1,6.4.2. The timing board 6.4.1,6.4.2 is driven to control the on-off condition of the vacuum arc-extinguishing chamber through the transverse left/right reciprocating motion of the gun mechanism. The converter shaft 6.5 is installed between the two timing plates, so that the converter pulling plate 6.6 is driven to reciprocate and simultaneously perform conversion control on the converter contact 6.7.1,6.7.2.
The on-load tap-changer is arranged below a transformer box cover or a cover, and is transversely arranged above a transformer winding coil. The main support plate 2 is fixed below the connecting plate 1.2, and the connecting plate 1.2 is connected with the transformer box cover.
The linear reciprocating transmission system 3 may be one of a rack transmission system, a screw transmission mechanism and a geneva mechanism system, as long as linear driving can be realized.
Claims (2)
1. An on-load tap-changer, characterized by: the on-load tap-changer is arranged below a transformer box cover or a cover, and is transversely arranged above a transformer winding coil; the main support plate (2) is fixed below the connecting plate (1.2), and the connecting plate (1.2) is connected with the transformer box cover;
the on-load tapping switch structurally comprises a motor (1), a main support plate (2), a linear reciprocating transmission system (3), a selector system (4), a gun stock system (5) and a converter system (6); the switch has at least one set of a selector system (4) and a converter system (6); the selector system (4) and the converter system (6) are respectively arranged at two sides of the same main supporting plate (2), the motor (1) drives the selector system (4) through the linear reciprocating transmission system (3), the motor (1) also drives the gun machine system (5) to move, and the gun machine system (5) drives the converter system (6) to move;
the bolt system (5) is characterized in that: the main transmission shaft (1.3) and the eccentric block (5.1) coaxially rotate, the eccentric block (5.1) is arranged in a groove of the upper sliding box (5.2), the main transmission shaft (1.3) drives the upper sliding box (5.2) to move along the guide rail (5.4) when driving the eccentric block to rotate, the lower sliding box (5.6) is provided with the guide rail (5.4), the guide rail (5.4) is fixed on a bolt mechanism fixing plate (5.8), the outer side of the guide rail is sleeved with the compression spring (5.3), and the upper sliding box (5.2) and the lower sliding box (5.6) are respectively provided with a semicircular clamping plate (5.21) which is sleeved on the outer side of the guide rail and are in butt joint with two ends of the compression spring, namely, the upper sliding box (5.2), the lower sliding box (5.6) and the guide rail (5.4) are connected in a concentric circle structure along the radial direction of the guide rail;
the side of the upper sliding box is provided with a side wall (5.7), the outer side of the lower sliding box (5.6) is abutted with a limiting plate (5.5.1), and the limiting plate (5.5.1) is arranged on a rotating shaft (5.10);
the selector system (4) is structured as follows: the screw connecting sleeve (4.1) is matched with the screw rod (3.3), the movable support (4.2) is fixed with the screw connecting sleeve (4.1), the movable contact (4.3) is fixed on the movable support (4.2), the front end of the movable contact (4.3) is abutted with two adjacent contacts of the fixed contact, and the rear ends of the movable contacts (4.3) are respectively abutted with copper bars serving as public ends at any moment; an insulating auxiliary contact (4.4.6) is arranged between every two adjacent contacts, and the static contact is at least one row of transverse or longitudinal distribution;
the converter system (6) is structured as follows: the lower slide box (5.6) of the gun stock system is connected with the connecting rod (6.1); the connecting rod (6.1) is connected with the first insulating time sequence plate (6.4.1) and the second insulating time sequence plate (6.4.2) through the connecting plate (6.3), a converter shaft (6.5) is arranged between the first insulating time sequence plate (6.4.1) and the second insulating time sequence plate (6.4.2), a rotating shaft is arranged in the middle of the converter pull plate (6.6), one end of the rotating shaft is sleeved on the converter shaft (6.5), and the other end of the rotating shaft is in butt joint with the converter contact; grooves are formed in the first insulating time sequence plate (6.4.1) and the second insulating time sequence plate (6.4.2), and the main on-off switch (6.9.1) and the auxiliary time sequence block (6.9.2) of the vacuum arc-extinguishing chamber are sleeved in the grooves; the linear reciprocating transmission system (3) is a screw driving system, and the screw driving system is structurally characterized in that: the motor drives the main transmission shaft (1.3) to rotate, the main transmission shaft (1.3) drives the bevel gear (3.2) to rotate through the gear set, and the bevel gear (3.2) is meshed with the lead screw (3.3); the change of the motor revolution and the screw revolution is realized through the change of the tooth number of the gear set, so as to drive the selector system (4) to transversely convert and connect between the fixed selector contacts.
2. The on-load tap changer of claim 1, wherein: the linear reciprocating transmission system (3) is one of a rack transmission system, a screw transmission system and a geneva mechanism system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811576611.5A CN109449018B (en) | 2018-12-23 | 2018-12-23 | On-load tap-changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811576611.5A CN109449018B (en) | 2018-12-23 | 2018-12-23 | On-load tap-changer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109449018A CN109449018A (en) | 2019-03-08 |
| CN109449018B true CN109449018B (en) | 2023-11-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811576611.5A Active CN109449018B (en) | 2018-12-23 | 2018-12-23 | On-load tap-changer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109449018B (en) |
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| CN1841583A (en) * | 2005-03-28 | 2006-10-04 | 上海华明电力设备制造有限公司 | Combined type on-load tap-changer |
| CN2932595Y (en) * | 2006-06-06 | 2007-08-08 | 翁红英 | An operating device for double power switching |
| CN201167021Y (en) * | 2008-02-26 | 2008-12-17 | 上海华明电力设备制造有限公司 | External hanging combined on-load tap-changer |
| CN102024552A (en) * | 2009-09-15 | 2011-04-20 | 上海华明电力设备制造有限公司 | Large-rotating angle quick mechanism used for on-load tap-changer |
| CN201527911U (en) * | 2009-10-23 | 2010-07-14 | 贵州长征电力设备有限公司 | Vacuum on-load tap-changer gear converter |
| CN102097246A (en) * | 2011-01-28 | 2011-06-15 | 贵州长征电力设备有限公司 | Rotational structure of vacuum on-load tap changer (OLTC) |
| CN103430267A (en) * | 2011-03-12 | 2013-12-04 | 赖茵豪森机械制造公司 | On-load tap changer |
| CN202141589U (en) * | 2011-07-01 | 2012-02-08 | 昆明益通美尔防雷工程有限公司 | Intelligent on-line monitoring device for on-load tap-changer of transformer |
| KR20130100593A (en) * | 2012-03-02 | 2013-09-11 | 엘에스산전 주식회사 | Common actuator system of multi switches for switchgear |
| CN104246949A (en) * | 2012-04-20 | 2014-12-24 | 赖茵豪森机械制造公司 | On-load tap changer |
| CN203397928U (en) * | 2013-07-12 | 2014-01-15 | 广州市德百顺电气科技有限公司 | Vacuum on-load tap-changer |
| CN105206443A (en) * | 2015-10-11 | 2015-12-30 | 辽宁金立电力电器有限公司 | Distribution transformer on-load tap changer |
| CN105336516A (en) * | 2015-12-10 | 2016-02-17 | 二一三电器(上海)有限公司 | Diverter switch device |
| CN207124127U (en) * | 2017-08-22 | 2018-03-20 | 济南爱迪电气设备有限公司 | A kind of special on-load voltage regulating switch of distribution transformer |
| CN107968002A (en) * | 2017-11-30 | 2018-04-27 | 浙江纪元电气科技股份有限公司 | A kind of permanent magnet vacuum on-load tap changer |
| CN209149961U (en) * | 2018-12-23 | 2019-07-23 | 辽宁金立电力电器有限公司 | A kind of load ratio bridging switch |
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