CN110993392A - Dry-type transformer on-load capacity regulating switch and transformer - Google Patents
Dry-type transformer on-load capacity regulating switch and transformer Download PDFInfo
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- CN110993392A CN110993392A CN201911354525.4A CN201911354525A CN110993392A CN 110993392 A CN110993392 A CN 110993392A CN 201911354525 A CN201911354525 A CN 201911354525A CN 110993392 A CN110993392 A CN 110993392A
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- type transformer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0038—Tap change devices making use of vacuum switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/56—Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
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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
- H01H3/28—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
- H01H2003/466—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle using a living hinge to connect the levers
Abstract
The invention provides an on-load capacitance regulating switch of a dry type transformer and the transformer, relates to the technical field of transformers, and aims to solve the technical problems that an existing capacitance regulating switch is complex in transmission structure, easy to switch and even ineffective. The on-load capacity regulating switch of the dry type transformer comprises a high-voltage side switch, a low-voltage side switch, a moving plate and a driving mechanism; the moving plate is connected with the driving mechanism; the high-voltage side switch comprises a solid-sealed polar pole with a high-voltage vacuum bubble inside and a transmission part; the upper end of the transmission piece is hinged with the lower end of the insulating pull rod of the solid-sealed polar pole, and the lower end of the transmission piece is hinged with the moving plate; the low-voltage side switch comprises a moving contact and a fixed contact; the moving contact is connected with the moving plate. The transformer is provided with the dry type transformer on-load capacitance regulating switch. The invention adopts the permanent magnet operating mechanism, has simple transmission structure, is not easy to generate mechanical clamping stagnation and abrasion, and avoids failure. Only the high-voltage side adopts the vacuum bulb, and the low-voltage side adopts the air switch, so that the volume of the capacity-regulating switch is reduced, and the cost is saved.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to an on-load capacitance-regulating switch of a dry-type transformer and the transformer.
Background
In power supply systems, some seasonal or periodic loads are often encountered. During the peak of electricity utilization, the electricity demand is very large, and a large-capacity transformer is needed to meet the electricity utilization demand; when the electricity consumption is low, the electricity demand is very small, so that a large amount of electricity is wasted by large no-load loss of the large-capacity transformer, and the power factor is reduced. The capacity regulating transformer can regulate capacity according to the load size, reduce loss, improve the transformer load factor and have higher economic benefit and social benefit.
The on-load capacity regulating switch of the dry type transformer is used for regulating the capacity of the dry type transformer by switching the serial connection and parallel connection modes of low-voltage windings and the connection mode of high-voltage windings under the condition that the dry type transformer does not disconnect the load. The existing dry-type transformer on-load capacity regulating switch mostly adopts a spring mechanism operated by a motor, has a complex transmission structure, and is easy to be converted in place or even fail due to mechanical clamping stagnation, abrasion and the like. Because of adopting the dry switch design, the high-low pressure side adopts the vacuum bubble, and is bulky. When the low-voltage side adopts an air switch, the high-voltage and low-voltage fracture time is not matched, and the low-voltage contact is easy to ablate.
Disclosure of Invention
The invention aims to provide an on-load capacitance-regulating switch of a dry-type transformer and the transformer, which are used for solving the technical problems that the existing on-load capacitance-regulating switch of the dry-type transformer has a complex transmission structure, is easy to be converted into a non-position state or even fails due to mechanical clamping stagnation, abrasion and the like, and simultaneously reduce the volume of the switch.
In a first aspect, the invention provides an on-load capacitance-regulating switch of a dry-type transformer, which comprises a high-voltage side switch, a low-voltage side switch, a moving plate and a driving mechanism;
the motion plate is connected to the driving mechanism and can be driven by the driving mechanism to do linear motion along the plane where the motion plate is located;
the high-voltage side switch comprises a solid-sealed polar pole with a high-voltage vacuum bubble inside and a transmission part; the upper end of the transmission piece is hinged with the lower end of the insulating pull rod of the embedded pole, and the lower end of the transmission piece is hinged with the moving plate at an acute angle;
the low-voltage side switch comprises a moving contact and a static contact, and the moving contact and the static contact form an air switch; the moving contact is connected with the moving plate and can be in contact with or disconnected from the static contact under the driving of the moving plate.
As a further aspect of the first aspect of the present invention, the driving mechanism includes a mounting plate, a driving member, and a connecting member;
the driving piece is arranged on the mounting plate;
one end of the connecting piece is connected with the moving end of the driving piece, and the other end of the connecting piece is connected with the moving plate.
As a further aspect of the first aspect of the present invention, the driving member includes a permanent magnet mechanism electromagnet;
the permanent magnet mechanism electromagnet is arranged on the mounting plate, and an iron core of the permanent magnet mechanism electromagnet is connected with the connecting piece.
As a further aspect of the first aspect of the present invention, the driving member and the moving plate are respectively located on both sides of the mounting plate;
the mounting plate is provided with a limit long hole, and the connecting piece is positioned in the limit long hole.
As a further aspect of the first aspect of the present invention, the dry-type transformer on-load capacitance-regulating switch includes a plurality of the high-voltage side switches;
and part of the transmission pieces of the high-voltage side switches incline towards one movement direction of the movement plate, and the transmission pieces of the rest of the high-voltage side switches incline towards the other movement direction of the movement plate so as to open or close the high-voltage side switches during movement.
As a further aspect of the first aspect of the present invention, the on-load capacitance-regulating switch of the dry-type transformer includes a plurality of low-voltage-side switches, and the plurality of moving contacts and the plurality of static contacts are arranged at intervals along a moving direction of the moving plate;
the moving contact has two states of contacting one fixed contact and simultaneously contacting two adjacent fixed contacts, and can be switched between the two states under the driving of the moving plate.
As a further aspect of the first aspect of the present invention, the movable contact includes two clamping plates, and both of the two clamping plates are parallel to the moving plate and can clamp the stationary contact.
As a further aspect of the first aspect of the present invention, a breaking time of the high-side switch is greater than a breaking time of the low-side switch, and the low-side switch is located within the breaking time of the high-side switch when switching.
As a further aspect of the first aspect of the present invention, the dry-type transformer on-load capacitance-regulating switch further includes a cabinet, and the cabinet has an insulating side plate;
the high-voltage side switch, the low-voltage side switch and the driving mechanism are all arranged in the cabinet body, and the inlet and outlet wires penetrate through the insulation side plate and are connected with the high-voltage side switch and the low-voltage side switch.
In a second aspect, the invention provides a transformer, which includes the dry-type transformer on-load capacitance-regulating switch.
By combining the technical scheme, the beneficial effects brought by the invention are analyzed as follows:
the invention provides an on-load capacity regulating switch of a dry-type transformer, which comprises a high-voltage side switch, a low-voltage side switch, a moving plate and a driving mechanism, wherein the high-voltage side switch is connected with the low-voltage side switch through a connecting rod; the moving plate is connected with the driving mechanism and can make linear motion along the plane where the moving plate is located under the driving of the driving mechanism; the high-voltage side switch comprises a solid-sealed polar pole and a transmission part; the upper end of the transmission piece is hinged with the lower end of the insulating pull rod of the solid-sealed polar pole, and the lower end of the transmission piece is hinged with the moving plate at an acute angle; the low-voltage side switch comprises a moving contact and a fixed contact; the moving contact is connected to the moving plate and can be in contact with or disconnected from the fixed contact under the driving of the moving plate. The high-voltage side adopts vacuum bubbles, and the low-voltage side switch is in fracture time of the high-voltage side during switching, so that the low-voltage side switching is carried out under the condition of no electricity, and the low-voltage side is not subjected to arc ablation. Therefore, reliable conversion can be realized only by adopting the vacuum bubble at the high-voltage side and adopting the air switch at the low-voltage side, the switch volume is reduced, and the cost is saved. The on-load capacity-regulating switch of the dry-type transformer adopts a permanent magnet operating mechanism, a moving plate is a transmission structure between a driving mechanism and a high-voltage side switch and between the driving mechanism and a low-voltage side switch, the driving mechanism drives an insulating rod of a solid-sealed polar pole to act through the moving plate and a transmission rod to realize the connection and disconnection of the high-voltage side switch, and the driving mechanism directly drives a moving contact to make the moving contact or break the static contact through the moving plate to realize the connection and disconnection of the low-voltage side switch. In the on-load capacity regulating switch of the dry-type transformer, the transmission structure is a moving plate, the transmission structure is simple, mechanical clamping stagnation and abrasion are not easy to occur, further, the failure condition is effectively avoided, and the reliability of the on-load capacity regulating switch of the dry-type transformer is improved.
The invention also provides a transformer, which comprises the dry-type transformer on-load capacitance-regulating switch, so that the overall reliability of the transformer is improved.
Drawings
Fig. 1 is a schematic structural diagram of a first view angle of an on-load capacitance-regulating switch of a dry-type transformer according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second view angle of the on-load capacitance-regulating switch of the dry-type transformer according to the embodiment of the present invention;
FIG. 3 is a schematic structural diagram of the connection of the high-side switch, the moving plate and the driving mechanism provided by the embodiment of the invention;
fig. 4 is a schematic structural diagram of a connection between a low-side switch and a moving plate according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a driving mechanism according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a low-side switch according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an on-load capacitance-regulating switch of a dry-type transformer with a cabinet according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a transformer according to an embodiment of the present invention;
fig. 9 is a circuit diagram of a transformer with a large capacity according to an embodiment of the present invention;
fig. 10 is a circuit diagram of a transformer with a small capacity according to an embodiment of the present invention.
Icon: 10-a housing; 20-high side switch; 21-fixing and sealing the pole; 22-a transmission member; 30-low side switch; 31-moving contact; 32-fixed contact; 33-an insulator; 40-a drive mechanism; 41-mounting plate; 411-limit long hole; 42-a drive member; 43-a connector; 50-a sports board; 60-a cabinet body; 61-insulating side plate; 70-low pressure closing plate.
Detailed Description
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience of description and simplification of description.
In the description of the present invention, the terms "mounted" and "connected" should be interpreted broadly, for example, as being fixed or detachable or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention provides an on-load capacity regulating switch of a dry type transformer, and please refer to fig. 1 to 7 in the attached drawings of the specification.
As shown in fig. 1 and 2, the dry type transformer on-load capacitance-regulating switch includes a high-voltage side switch 20, a low-voltage side switch 30, a moving plate 50, and a driving mechanism 40. As shown in fig. 3 and 4, the moving plate 50 is connected to the driving mechanism 40 and can move linearly along its own plane under the driving of the driving mechanism 40. As shown in fig. 3, the high-voltage side switch 20 includes a solid-sealed pole 21 and a transmission member 22, an upper end of the transmission member 22 is hinged to a lower end of an insulating pull rod of the solid-sealed pole 21, and a lower end of the transmission member 22 is hinged to the moving plate 50 at an acute angle. As shown in fig. 6, which illustrates the structure of the low-voltage side switch 30, the low-voltage side switch 30 includes a movable contact 31 and a stationary contact 32, and the movable contact 31 is connected to the moving plate 50 and can be brought into contact with or disconnected from the stationary contact 32 by the moving plate 50. The moving plate 50 is a transmission structure between the driving mechanism 40 and the high-voltage side switch 20 and between the driving mechanism 40 and the low-voltage side switch 30, the driving mechanism 40 drives the insulating rod of the embedded pole 21 to act through the moving plate 50 and the transmission rod, so as to realize the connection and disconnection of the high-voltage side switch 20, and the driving mechanism 40 directly drives the moving contact 31 to make the moving contact 31 contact with or break the static contact 32 through the moving plate 50, so as to realize the connection and disconnection of the low-voltage side switch 30. In the on-load capacity regulating switch of the dry-type transformer, the transmission structure is the moving plate 50, the transmission structure is simple, mechanical clamping stagnation and abrasion are not easy to occur, further, the failure condition is effectively avoided, and the reliability of the on-load capacity regulating switch of the dry-type transformer is improved.
Fig. 1 and 2 also show that the dry-type transformer on-load capacitance-regulating switch further comprises a housing 10, a driving mechanism 40 is installed in the housing 10, and a solid-sealed pole 21 is installed on the outer side of the housing 10.
As a specific structure of the driving mechanism 40 shown in fig. 3 and 5, the driving mechanism 40 includes a mounting plate 41, a driving member 42, and a link member 43. The driving member 42 is mounted on the mounting plate 41, one end of the connecting member 43 is connected to the moving end of the driving member 42, and the other end of the connecting member 43 is connected to the moving plate 50. When the on-load capacitance-regulating switch of the dry-type transformer works, the moving end of the driving part 42 drives the moving plate 50 to do linear motion through the connecting part 43, then the moving plate 50 drives the insulating rod of the embedded pole 21 through the transmission part 22 to realize the connection or disconnection of the high-voltage side switch 20, the moving plate 50 directly drives the moving contact 31, the moving contact 31 is in contact with or disconnected from the static contact 32, and the connection and disconnection of the low-voltage side switch 30 are realized.
With continued reference to fig. 3 and 5, the driving member 42 includes a permanent magnet mechanism electromagnet, and the iron core of the permanent magnet mechanism moves along its axis direction when the coil of the permanent magnet mechanism electromagnet is energized, and the moving direction of the iron core is changed by changing the current direction of the coil of the permanent magnet mechanism electromagnet. The permanent magnet mechanism electromagnet is arranged on the mounting plate 41, and the iron core of the permanent magnet mechanism electromagnet is connected with the connecting piece 43. When the coil of the electromagnet of the permanent magnet mechanism is electrified, the iron core drives the moving plate 50 to do linear motion through the connecting piece 43. Of course, the driving member 42 is not limited to the permanent magnet mechanism electromagnet shown in fig. 3 and 5, and may also be another structure capable of driving the moving plate 50 to make a linear motion, for example, the driving member 42 is a linear module, and one end of the connecting member 43 is connected to the sliding table of the linear module.
In the driving mechanism 40 shown in fig. 3 and 5, the driving member 42 and the moving plate 50 are respectively located at two sides of the mounting plate 41, the mounting plate 41 is provided with a long limiting hole 411, and the connecting member 43 is located in the long limiting hole 411. The limit long hole 411 can limit the movement limit distance of the connecting piece 43, and therefore, the movement limit distance of the moving plate 50 is also limited, and by setting the position and the length of the limit long hole 411, two limit positions of the moving plate 50 can be respectively corresponding to the connection or disconnection of the high-voltage side switch 20 and the connection or disconnection of the low-voltage side switch 30, so that the moving plate 50 drives the high-voltage side switch 20 and the low-voltage side switch 30 to be accurately connected or disconnected. Of course, the driving member 42 and the moving plate 50 can be located on the same side of the mounting plate 41, and in this case, if the movement limit distance of the moving plate 50 is limited, a blocking plate can be disposed on the mounting plate 41 to block the connecting member 43.
As shown in fig. 1 to 3, the dry type transformer on-load capacitance regulating switch includes a plurality of high-voltage side switches 20; the transmission members 22 of some of the high side switches 20 are inclined toward one movement direction of the moving plate 50, and the transmission members 22 of the remaining high side switches 20 are inclined toward the other movement direction of the moving plate 50. For example, fig. 1 and 2 show that the dry type transformer on-load capacitance-regulating switch has five high-voltage side switches 20, wherein the transmission members 22 of three high-voltage side switches 20 are inclined toward one moving direction of the moving plate 50, and the transmission members 22 of the other two high-voltage side switches 20 are inclined toward the other moving direction of the moving plate 50. Of course, the dry-type transformer on-load capacitance-regulating switch can have four, six, eight, etc. high-voltage side switches 20 according to actual needs; meanwhile, the number of the high side switches 20, in which the transmission member 22 is inclined to one movement direction of the movement plate 50, and the number of the high side switches 20, in which the transmission member 22 is inclined to the other movement direction of the movement plate 50, may be set according to actual circumstances.
Fig. 3 shows two high-voltage side switches 20 with different inclination directions of the transmission member 22, and the operation of the plurality of high-voltage side switches 20 will be described by taking fig. 3 as an example. In fig. 3, when the driving mechanism 40 drives the moving plate 50 to move leftward, the left transmission member 22 pushes the insulating rod of the high-voltage side switch 20 upward, and the right transmission member 22 pulls the insulating rod of the high-voltage side switch 20 downward, at this time, one high-voltage side switch 20 of the two high-voltage side switches 20 in fig. 3 is turned on, and the other high-voltage side switch 20 is turned off; when the driving mechanism 40 drives the moving plate 50 to move to the right, the transmission member 22 on the left side pulls the insulating rod of the high-voltage side switch 20 downward, and the transmission member 22 on the right side pushes the insulating rod of the high-voltage side switch 20 upward, at this time, one high-voltage side switch 20 of the two high-voltage side switches 20 in fig. 3 is turned off, and the other high-voltage side switch 20 is turned on. Therefore, in the on-load capacitance-regulating switch of the dry-type transformer, when the moving plate 50 moves towards one direction, part of the high-voltage side switches 20 are switched on, and the other part of the high-voltage side switches 20 are switched off; when the moving plate 50 moves in the other direction, the high-voltage side switch 20 that is turned on when the moving plate 50 moves in the other direction is turned off, and the high-voltage side switch 20 that is turned off when the moving plate moves in the other direction is turned on.
As shown in fig. 4, the on-load capacitance-regulating switch of the dry-type transformer includes a plurality of low-voltage side switches 30, and a plurality of moving contacts 31 and a plurality of static contacts 32 are arranged at intervals along the moving direction of a moving plate 50. The movable contact 31 has two states, when the movable contact 31 is in the first state, the movable contact 31 is only contacted with one fixed contact 32; when the movable contact 31 is in the second state, the movable contact 31 is simultaneously in contact with two adjacent fixed contacts 32. When the moving plate 50 moves the movable contact 31, the movable contact 31 can be switched between a first state and a second state.
Each low-voltage side switch 30 may include two fixed contacts 32 and one moving contact 31, the two fixed contacts 32 are arranged at intervals along the moving direction of the moving plate 50, and the moving contact 31 can be driven by the moving plate 50 to contact with the two fixed contacts 32 simultaneously or only one of the fixed contacts 32. Each low-voltage side switch 30 may also include three fixed contacts 32 and one movable contact 31, where the three fixed contacts 32 are arranged at intervals along the moving direction of the moving plate 50, and taking the moving plate 50 moving along the left-right direction as an example, the movable contact 31 can contact the left fixed contact 32 and the middle fixed contact 32 at the same time, or contact the right fixed contact 32 and the middle fixed contact 32 at the same time, or the movable contact 31 is connected to only one of the fixed contacts 32. The low-side switches 30 may be independent of each other, or adjacent low-side switches 30 may have a common stationary contact 32.
Fig. 6 shows a specific structure of the low-voltage side switch 30, wherein the movable contact 31 includes two clamping plates, each of which is parallel to the moving plate 50 and can clamp the stationary contact 32. The two clamping plates of the movable contact 31 are driven by the moving plate 50 to simultaneously clamp two fixed contacts 32 or only one fixed contact 32. Of course, the structure of the movable contact 31 is not limited to the structure shown in fig. 6, and the movable contact 31 may also have only one sliding plate, the sliding plate is attached to the stationary contact 32, and the sliding plate can be simultaneously contacted with two stationary contacts 32 or only one stationary contact 32 under the driving of the moving plate 50.
Specifically, fig. 6 also shows that the low-voltage side switch 30 has an insulator 33, the lower end of the insulator 33 is connected to the moving plate 50, and the movable contact 31 is mounted to the insulator 33. The plurality of static contacts 32 are arranged on the inner side of the low voltage sealing plate 70, and the outer side of the low voltage sealing plate 70 is provided with a wiring terminal which is connected with the corresponding static contact 32.
The breaking time of the high-voltage side switch 20 is greater than that of the low-voltage side switch 30, and the low-voltage side switch 30 is located within the breaking time of the high-voltage side switch 20 during switching, so that the low-voltage side switch 30 is switched without electricity, and the low-voltage side switch 30 is not subjected to arc ablation.
As shown in fig. 7, the on-load capacitance-regulating switch of the dry-type transformer further includes a cabinet 60, the high-voltage side switch 20, the low-voltage side switch 30 and the driving mechanism 40 are all disposed in the cabinet 60, and the cabinet 60 protects the high-voltage side switch 20, the low-voltage side switch 30 and the driving mechanism 40, so as to reduce the influence of the outside on the on-load capacitance-regulating switch of the dry-type transformer. When the dry-type transformer is used with the capacity-regulating switch, the cabinet 60 is grounded, and the high-voltage side switch 20, the low-voltage side switch 30, and the driving mechanism 40 are insulated from the ground. The cabinet 60 has an insulating side plate 61, and the incoming and outgoing lines are connected to the high-voltage side switch 20 and the low-voltage side switch 30 through the insulating side plate 61, thereby maintaining insulation between the lines and insulation to the ground.
Meanwhile, the controller matched with the on-load capacitance-regulating switch of the dry-type transformer can be installed on the door panel of the cabinet body 60 or led to other safe areas.
The on-load capacitance regulating switch of the dry type transformer can be used for an DYn11(Yyn0) type capacitance regulating transformer and can also be used for an DYn11(Yzn11) type capacitance regulating transformer with complex lead wires.
The invention also provides a transformer, and the invention also refers to fig. 8 to fig. 10.
As shown in fig. 8, the transformer includes the dry-type on-load capacitance-regulating switch, and specifically, a cabinet 60 of the dry-type on-load capacitance-regulating switch is disposed on a bottom channel steel of the transformer. The dry type on-load capacitance-regulating switch is simple in transmission structure, mechanical clamping stagnation and abrasion are not easy to occur, failure is effectively avoided, and reliability of the transformer is improved.
Fig. 9 and 10 show a connection method of the transformer using the dry-type transformer on-load capacitance-regulating switch, where fig. 9 is a circuit diagram of the transformer with a large capacity and fig. 10 is a circuit diagram of the transformer with a small capacity. Of course, the transformer may adopt other wiring manners besides fig. 9 and 10 according to actual requirements.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An on-load capacity regulating switch of a dry type transformer is characterized by comprising a high-voltage side switch, a low-voltage side switch, a moving plate and a driving mechanism;
the motion plate is connected to the driving mechanism and can be driven by the driving mechanism to do linear motion along the plane where the motion plate is located;
the high-voltage side switch comprises a solid-sealed polar pole with a high-voltage vacuum bubble inside and a transmission part; the upper end of the transmission piece is hinged with the lower end of the insulating pull rod of the embedded pole, and the lower end of the transmission piece is hinged with the moving plate at an acute angle;
the low-voltage side switch comprises a moving contact and a static contact, and the moving contact and the static contact form an air switch; the moving contact is connected with the moving plate and can be in contact with or disconnected from the static contact under the driving of the moving plate.
2. An on-load capacity regulating switch for a dry-type transformer as claimed in claim 1, wherein said driving mechanism comprises a mounting plate, a driving member and a connecting member;
the driving piece is arranged on the mounting plate;
one end of the connecting piece is connected with the moving end of the driving piece, and the other end of the connecting piece is connected with the moving plate.
3. An on-load capacity regulating switch for a dry-type transformer as claimed in claim 2, wherein said driving member comprises a permanent magnet mechanism electromagnet;
the permanent magnet mechanism electromagnet is arranged on the mounting plate, and an iron core of the permanent magnet mechanism electromagnet is connected with the connecting piece.
4. The on-load capacitance regulating switch of the dry-type transformer according to claim 2 or 3, wherein the driving member and the moving plate are respectively positioned at two sides of the mounting plate;
the mounting plate is provided with a limit long hole, and the connecting piece is positioned in the limit long hole.
5. An on-load capacitance regulating switch of a dry-type transformer according to claim 1, wherein the on-load capacitance regulating switch of a dry-type transformer comprises a plurality of said high-side switches;
and part of the transmission pieces of the high-voltage side switches incline towards one movement direction of the moving plate, and the transmission pieces of the rest high-voltage side switches incline towards the other movement direction of the moving plate.
6. An on-load capacity regulating switch of a dry-type transformer according to claim 1, wherein the on-load capacity regulating switch of the dry-type transformer comprises a plurality of low-voltage side switches, and a plurality of moving contacts and a plurality of fixed contacts are arranged at intervals along the moving direction of the moving plate;
the moving contact has two states of contacting one fixed contact and simultaneously contacting two adjacent fixed contacts, and can be switched between the two states under the driving of the moving plate.
7. An on-load capacity-regulating switch of a dry-type transformer as claimed in claim 6, wherein said movable contact comprises two clamping plates, both of said clamping plates being parallel to said moving plate and capable of clamping said stationary contact.
8. The on-load capacitance-regulating switch of the dry-type transformer according to claim 1, wherein the breaking time of the high-voltage side switch is greater than that of the low-voltage side switch, and the low-voltage side switch is located within the breaking time of the high-voltage side switch during switching.
9. An on-load capacity regulating switch of a dry-type transformer according to claim 1, further comprising a cabinet body, wherein the cabinet body is provided with an insulating side plate;
the high-voltage side switch, the low-voltage side switch and the driving mechanism are all arranged in the cabinet body, and the inlet and outlet wires penetrate through the insulation side plate and are connected with the high-voltage side switch and the low-voltage side switch.
10. A transformer comprising an on-load capacitance regulating switch of a dry-type transformer as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911354525.4A CN110993392A (en) | 2019-12-30 | 2019-12-30 | Dry-type transformer on-load capacity regulating switch and transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113327758A (en) * | 2021-05-31 | 2021-08-31 | 山东晨宇电气股份有限公司 | Single-phase capacity-regulating traction transformer switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113327758A (en) * | 2021-05-31 | 2021-08-31 | 山东晨宇电气股份有限公司 | Single-phase capacity-regulating traction transformer switch |
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