CN113327758B - Single-phase capacity-regulating traction transformer switch - Google Patents
Single-phase capacity-regulating traction transformer switch Download PDFInfo
- Publication number
- CN113327758B CN113327758B CN202110596749.7A CN202110596749A CN113327758B CN 113327758 B CN113327758 B CN 113327758B CN 202110596749 A CN202110596749 A CN 202110596749A CN 113327758 B CN113327758 B CN 113327758B
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- Prior art keywords
- pin
- switch
- transformer
- contact
- static contact
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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
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
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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
- H01H9/02—Bases, casings, or covers
Abstract
The application discloses single-phase accent holds traction transformer's switch, including switch body and switch transmission case, adopt stainless steel square union coupling between switch body and the switch transmission case, the universal joint is equipped with at the both ends of stainless steel square union, and the switch body is installed on the support above the low pressure side radiator of transformer body, and the switch transmission case is installed in ground transformer side. Has the following advantages: the eddy current loss that produces when having reduced the static contact and passing through the heavy current increases creepage distance, reduces safe distance between electric conductor and the shell, only two stations, and the station is clear, and the position is clear and definite, adjusts the gear and is difficult for makeing mistakes, and the contact surface is big, and the contact is even, long service life.
Description
Technical Field
The invention relates to a switch of a single-phase capacity-regulating traction transformer, belonging to the technical field of transformer regulating components.
Background
The transformer self-loss consists of no-load loss and load loss, and the no-load loss of the transformer exists in real time under the condition that the voltage of the transformer terminal is unchanged and has unchanged magnitude; the load loss varies with load variations. In some cases, the transformer load losses are already very low, but the no-load losses of the transformer do not change or even increase due to the low voltage rise with the amount of electricity used. The appearance of the capacity-regulating transformer well solves the problems, and when the power consumption is low, the transformer is converted into low-capacity operation, so that the no-load loss of the transformer is greatly reduced.
At present, most capacity regulating switches in the market adopt a one-third capacity regulating mode, and the one-third capacity regulating scheme realizes the purpose of regulating the capacity by a mode of performing star-shaped and triangular conversion on a high-voltage side and performing serial-parallel conversion on a low-voltage side.
However, the existing capacitance-regulating switch has the following disadvantages:
1. the eddy current loss generated when the static contact passes through a large current is large;
2. the safe distance between the conductor and the shell is short;
3. the number of stations is large, and gear adjustment is easy to make mistakes;
4. the contact surface of the contact is small, the contact is uneven, and the service life is short.
Disclosure of Invention
The invention aims to solve the technical problems, and provides a switch of a single-phase capacity-regulating traction transformer, which reduces the eddy current loss generated when a static contact passes through a large current, increases the creepage distance, reduces the safety distance between an electric conductor and a shell, has only two stations, clear stations and definite positions, is difficult to make mistakes in regulating gears, and has large contact surface of the contact, uniform contact and long service life.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a single-phase accent holds traction transformer's switch, includes switch body and switch transmission case, adopts stainless steel square union coupling between switch body and the switch transmission case, and the universal joint is equipped with at the both ends of stainless steel square union, and the switch body is installed on the low pressure side radiator top support of transformer body, and the switch transmission case is installed in ground transformer side.
Further, the switch is arranged on the low-voltage side of the single-phase capacity-regulating transformer.
Furthermore, an input side static contact and an output side static contact which extend out are arranged on the switch transmission case, the input side static contact comprises an a1 pin, an a2 pin, an x1 pin and an x2 pin, the a1 pin, the a2 pin, the x1 pin and the x2 pin of the input side static contact are respectively and correspondingly connected with a low-voltage T1 pin, a low-voltage T2 pin, a low-voltage x1 pin and a low-voltage x2 pin of a traction transformer, and the output side static contact is connected with a traction power supply circuit of the transformer.
Furthermore, one side of the switch transmission box is provided with a transmission rod gear box, the transmission rod gear box is connected with an insulating transmission rod, and the insulating transmission rod is provided with an insulating transmission rod support and two groups of moving contacts.
Furthermore, each group of moving contacts comprises a 1# moving contact and a 2# moving contact, the 1# moving contact is connected with an a1 pin and an x1 pin of the input side static contact, the 2# moving contact is used for adjusting a switch station, and the station adjusting process is that the 2# moving contact is connected with the a1 pin and the x1 pin of the input side static contact from the a1 pin and the x1 pin which are far away from the input side static contact.
Furthermore, the 1# moving contact and the 2# moving contact are arranged on an insulating epoxy glass steel tube, the 1# moving contact and the 2# moving contact are connected through a connecting copper tube, and the connecting copper tube is sleeved on the insulating transmission rod.
Furthermore, the switch is an oil-immersed station switch, a shell of the switch body is welded by a low-magnetic steel plate, and transformer oil is filled in the shell.
Furthermore, the moving contact adopts a double-spring clamping groove structure.
Furthermore, the input side static contact and the output side static contact are epoxy resin casting type insulator structures, the creepage distance between the electric conductor and the shell is increased, the electric conductor is a rectangular tinned copper bar, and the electric conduction performance is good and convenient to be connected with a bus copper bar.
By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:
1. the capacitance-adjusting switch shell material is a low-magnetic steel plate, so that eddy current loss generated when a static contact passes through a large current is reduced;
2. the static contact adopts epoxy resin casting type insulator structure, and especially the casing outer part adopts multilayer umbrella formula structure, increases creepage distance, reduces the safe distance between electric conductor and the shell.
3. The switch has only two stations, the stations are clear, the positions are clear, and gears are not easy to make mistakes during adjustment.
4. The moving contact adopts a double-spring clamping groove structure, the contact surface of the contact is large, the contact is uniform, and the service life is long.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram of a single-phase capacity-regulating traction transformer according to the present invention;
FIG. 2 is a schematic structural diagram of a switch body according to the present invention;
fig. 3 and 4 are schematic structural views of the switch gear box of the invention.
Detailed Description
Embodiment 1, as shown in fig. 1 to 4, a switch of single-phase adjustable-capacitance traction transformer, including switch body 1 and switch transmission case 2, adopt stainless steel square pipe 3 to connect between switch body 1 and the switch transmission case 2, the universal joint is equipped with at the both ends of stainless steel square pipe 3, and switch body 1 installs on the support above the low pressure side radiator of transformer body, and switch transmission case 2 installs in ground transformer side, convenient operation.
The switch is arranged on the low-voltage side of the single-phase capacity-regulating transformer, an input side static contact 5 and an output side static contact 6 which extend out are arranged on the switch transmission case 2, the input side static contact 5 comprises an a1 pin, an a2 pin, an x1 pin and an x2 pin, the a1 pin, the a2 pin, the x1 pin and the x2 pin of the input side static contact 5 are respectively and correspondingly connected with a low-voltage T1 pin, a T2 pin, an x1 pin and an x2 pin of the traction transformer, and the output side static contact 6 is connected with a traction power supply circuit of the traction transformer.
One side of the switch transmission box 2 is provided with a transmission rod gear box 21, the transmission rod gear box 21 is connected with an insulating transmission rod 22, the insulating transmission rod 22 is provided with an insulating transmission rod support 23 and two groups of moving contacts, each group of moving contacts comprises a 1# moving contact 24 and a 2# moving contact 26,1# moving contact 24 which are connected with a1 pin and an x1 pin of the input side static contact 5, the 1# moving contact 24 and the 2# moving contact 26 are installed on an insulating epoxy glass steel tube, the 1# moving contact 24 and the 2# moving contact 26 are connected through a connecting copper tube 25, good insulating performance is achieved between the 1# moving contact 24 and the 2# moving contact 26, a shifting handle in the transmission box rotates the capacitance adjusting switch to achieve conversion between a position shown in fig. 3 and a position shown in fig. 4, the 2# moving contact 26 is enabled to be connected with an a2 pin and an x2 pin of the input side static contact 5 from a2 pin and an a2 pin far away from the input side static contact 5, and accordingly large and small capacity output of the capacitance adjusting transformer on the low voltage side is achieved.
The moving contact adopts a double-spring clamping groove structure.
The switch is an oil-immersed station switch, a shell of a switch body is welded by a low-magnetic steel plate, transformer oil is filled in the shell, and the transformer oil has two functions of insulation and heat dissipation.
The input side static contact 5 and the output side static contact 6 are epoxy resin casting type insulator structures, the creepage distance between the electric conductor and the shell is increased, the electric conductor is a rectangular tinned copper bar, and the electric conduction performance is good and convenient to be connected with a bus copper bar.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (1)
1. The utility model provides a switch of single-phase accent appearance traction transformer which characterized in that: the transformer comprises a switch body (1) and a switch transmission case (2), wherein the switch body (1) and the switch transmission case (2) are connected by a stainless steel square tube (3), universal joints are arranged at two ends of the stainless steel square tube (3), the switch body (1) is arranged on a support above a low-voltage side radiator of a transformer body, and the switch transmission case (2) is arranged on the side of a ground transformer;
the switch is arranged on the low-voltage side of the single-phase capacity-regulating transformer;
an input side static contact (5) and an output side static contact (6) which extend out are arranged on the switch transmission case (2), the input side static contact (5) comprises an a1 pin, an a2 pin, an x1 pin and an x2 pin, the a1 pin, the a2 pin, the x1 pin and the x2 pin of the input side static contact (5) are respectively and correspondingly connected with a low-voltage T1 pin, a T2 pin, the x1 pin and the x2 pin of the traction transformer, and the output side static contact (6) is connected with a traction power supply circuit of the transformer;
a transmission rod gear box (21) is arranged on one side of the switch transmission box (2), the transmission rod gear box (21) is connected with an insulating transmission rod (22), and an insulating transmission rod support (23) and two groups of moving contacts are arranged on the insulating transmission rod (22);
each group of moving contacts comprises a 1# moving contact (24) and a 2# moving contact (26), the 1# moving contact (24) is connected with an a1 pin and an x1 pin of the input side static contact, the 2# moving contact (26) is used for adjusting a switching station, and the station adjusting process is that the 2# moving contact (26) is connected to the a1 pin and the x1 pin of the input side static contact from the a1 pin and the x1 pin which are far away from the input side static contact;
the 1# moving contact (24) and the 2# moving contact (26) are arranged on an insulated epoxy glass steel tube, the 1# moving contact (24) and the 2# moving contact (26) are connected through a connecting copper tube (25), and the connecting copper tube (25) is sleeved on the insulated transmission rod (22);
the switch is an oil-immersed station switch, a shell of the switch body is welded by a low-magnetic steel plate, and transformer oil is filled in the shell;
the moving contact adopts a double-spring clamping groove structure;
the input side static contact and the output side static contact are of epoxy resin casting type insulator structures, the creepage distance between the electric conductor and the shell is increased, the electric conductor is a rectangular tinned copper bar, and the electric conduction performance is good and convenient to be connected with a bus copper bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110596749.7A CN113327758B (en) | 2021-05-31 | 2021-05-31 | Single-phase capacity-regulating traction transformer switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110596749.7A CN113327758B (en) | 2021-05-31 | 2021-05-31 | Single-phase capacity-regulating traction transformer switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113327758A CN113327758A (en) | 2021-08-31 |
| CN113327758B true CN113327758B (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110596749.7A Active CN113327758B (en) | 2021-05-31 | 2021-05-31 | Single-phase capacity-regulating traction transformer switch |
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| Country | Link |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209282070U (en) * | 2018-10-09 | 2019-08-20 | 浙江宝威电气有限公司 | A kind of capacitance switch operating mechanism for capacitance-adjustable transformer |
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|---|---|---|---|---|
| CN201369252Y (en) * | 2008-11-26 | 2009-12-23 | 平高集团有限公司 | Universal transmission device and high voltage switch with same |
| CN201608097U (en) * | 2010-02-10 | 2010-10-13 | 无锡市蓝虹电子有限公司 | Air type high-voltage load switch |
| CN103700536A (en) * | 2013-12-25 | 2014-04-02 | 施耐德万高（天津）电气设备有限公司 | Spring energy storage mechanism for disconnecting switch |
| CN204668225U (en) * | 2015-04-28 | 2015-09-23 | 北京龙源开关设备有限责任公司 | Static contact of grounding switch one insulator |
| CN105119179B (en) * | 2015-07-23 | 2017-11-03 | 平高集团有限公司 | A kind of switch cubicle and breaker |
| CN106981382B (en) * | 2017-06-08 | 2019-05-07 | 山东民生电气设备有限公司 | A kind of low voltage tap changer |
| CN108511223B (en) * | 2018-05-26 | 2024-04-02 | 辽宁金立电力电器有限公司 | Horizontal on-load capacity-regulating voltage-regulating tapping switch |
| CN208240558U (en) * | 2018-06-13 | 2018-12-14 | 西安豪特电力开关制造有限公司 | A kind of disconnecting switch |
| CN109243793B (en) * | 2018-10-31 | 2024-04-26 | 常州太平洋电力设备(集团)有限公司 | Capacity-adjustable traction transformer |
| CN209804533U (en) * | 2019-05-30 | 2019-12-17 | 川开电气有限公司 | Load switch moving contact adopting double springs |
| CN111029116A (en) * | 2019-12-30 | 2020-04-17 | 北京博瑞莱智能科技集团有限公司 | On-load capacity-regulating switch of oil-immersed transformer and transformer |
| CN110993392A (en) * | 2019-12-30 | 2020-04-10 | 北京博瑞莱智能科技周口有限公司 | Dry-type transformer on-load capacity regulating switch and transformer |
| CN211604941U (en) * | 2019-12-31 | 2020-09-29 | 武汉泰普变压器开关有限公司 | Moving contact component of off-circuit tap-changer |
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2021
- 2021-05-31 CN CN202110596749.7A patent/CN113327758B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209282070U (en) * | 2018-10-09 | 2019-08-20 | 浙江宝威电气有限公司 | A kind of capacitance switch operating mechanism for capacitance-adjustable transformer |
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| CN113327758A (en) | 2021-08-31 |
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