CN211150353U - On-load capacity and voltage regulating switch applied to dry type transformer - Google Patents
On-load capacity and voltage regulating switch applied to dry type transformer Download PDFInfo
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- CN211150353U CN211150353U CN201922407425.5U CN201922407425U CN211150353U CN 211150353 U CN211150353 U CN 211150353U CN 201922407425 U CN201922407425 U CN 201922407425U CN 211150353 U CN211150353 U CN 211150353U
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Abstract
The embodiment of the utility model relates to a be applied to dry-type transformer have to carry and transfer and hold tap changer, the setting is in the on-load of dry-type transformer top and is transferred and hold tap changer, has to carry to transfer and holds tap changer and include switch housing and wrap up the oil tank outside switch housing, is located the oil tank top and is provided with the female row that is used for the wiring, is located the oil tank below and is provided with the connecting piece that is used for with taking a percentage and is connected, takes a percentage and sets up on dry-type transformer, has placed vegetable insulation oil in the oil tank. The on-load capacity and voltage regulating switch arranged above the dry-type transformer and the oil tank are wrapped on the outer wall surface of the switch shell, so that the dry-type transformer with the on-load capacity and voltage regulating switch is small in size and wide in application range; and the winding and the iron core in the dry-type transformer can not be immersed in the oil tank, so that the volume of the oil tank is reduced, and compared with the existing oil-immersed transformer capable of regulating capacity and voltage, the fire-fighting hidden danger is greatly reduced, so that the safety performance of an on-load capacity-regulating voltage-regulating switch applied to a dry-type transformer is improved.
Description
Technical Field
The utility model relates to a dry-type transformer technical field especially relates to a be applied to dry-type transformer have to carry and transfer appearance voltage regulating switch.
Background
The on-load capacity and voltage regulating switch applied to the dry type transformer at present is air-insulated, mainly comprises two types of vacuum bubble switch cabinets and a cylindrical air capacity and voltage regulating switch, and is placed in parallel with the transformer body to meet the requirement of safety distance, so that the dry type transformer is large in size. The space of the outdoor box-type substation is small, and the dry-type transformer with the switch cannot be accommodated in the outdoor box-type substation, so that an on-load capacity regulating and voltage regulating switch capable of being placed in the outdoor box-type substation is needed.
There is the accent of an oily formula distribution transformer usefulness and holds pressure regulating switch in current market, the volume of this switch is less, can satisfy the spatial arrangement requirement of outdoor box-type substation, nevertheless because winding, the whole immersion of iron core that use this switch dry-type transformer are in oil, and the oil tank volume is great, and insulating oil is mostly flammable mineral oil, has the fire control hidden danger, does not allow to settle in the position that fire control requirements such as residential quarter, special industrial area are high.
Therefore, how to make the on-load capacitance-regulating voltage-regulating switch small in size and high in safety becomes an important technical problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a be applied to dry-type transformer have to carry and transfer appearance tap changer for it is low to solve the current bulky or small security performance of having to carry and transfer appearance tap changer who is applied to dry-type transformer, technical problem that application scope is narrow.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
An on-load capacity and voltage regulating switch applied to a dry-type transformer is arranged above the dry-type transformer and comprises a switch shell and an oil tank wrapped outside the switch shell, a busbar used for wiring is arranged above the oil tank, a connecting piece used for being connected with a tap is arranged below the oil tank, and the tap is arranged on the dry-type transformer;
The dry transformer comprises an oil tank, a dry transformer and a power supply, wherein plant insulating oil is placed in the oil tank, the oil tank is made of a steel plate with the thickness larger than 2mm, and the projection area size of the oil tank does not exceed the area size of the dry transformer;
The ratio of the voltage of the dry-type transformer wired with delta windings to the voltage of the dry-type transformer wired with wye-connected windings is 
Preferably, the switch shell is internally provided with a capacity and voltage regulating switch, and the capacity and voltage regulating switch comprises a vacuum bubble and a switch connected with the vacuum bubble.
Preferably, the dry-type transformer comprises a winding connected to the tap, the winding comprising a high-voltage winding and a low-voltage winding;
The capacity of the dry-type transformer is divided into large capacity and small capacity; when the capacity of the dry-type transformer is the large capacity, the windings of the dry-type transformer are connected by Dyn 11; when the capacity of the dry-type transformer is the small capacity, the winding of the dry-type transformer is wired by Yyn 0.
Preferably, at least 9 taps are arranged on the dry-type transformer.
Preferably, the busbar is used for being connected with a load through a copper wire harness.
Preferably, the connecting piece is a connecting pressing plate made of copper materials.
Preferably, the range of tap adjustment is ± 10%.
According to the technical solution provided by the utility model, the embodiment of the utility model has the following advantage:
1. The on-load capacity and voltage regulating switch applied to the dry-type transformer is wrapped on the outer wall surface of the switch shell through the on-load capacity and voltage regulating switch arranged above the dry-type transformer and the oil tank, so that the dry-type transformer with the on-load capacity and voltage regulating switch is small in size, can be installed in an outdoor box-type substation, and is wide in application range; and because of the oil tank setting is in changing the formula transformer top futilely for winding, iron core among the change formula transformer futilely can not soak in the oil tank, also can reduce the volume of oil tank, consequently the dry-type transformer that has on-load accent holds the tap changer compares with current oil-immersed transformer that can adjust holding the pressure regulating, has greatly reduced the fire control hidden danger, thereby has improved the security performance who is applied to the on-load accent of dry-type transformer holds the tap changer. The technical problems of large volume or small volume, low safety performance and narrow application range of the existing on-load capacity and voltage regulating switch applied to the dry-type transformer are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an on-load capacitance and voltage regulating switch applied to a dry-type transformer according to an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The embodiment of the application provides an on-load capacity and voltage regulating switch applied to a dry-type transformer, which is used for solving the technical problems of large volume, small volume, low safety performance and narrow application range of the existing on-load capacity and voltage regulating switch applied to the dry-type transformer.
The first embodiment is as follows:
Fig. 1 is a schematic structural diagram of an on-load capacitance and voltage regulating switch applied to a dry-type transformer according to an embodiment of the present invention.
As shown in fig. 1, an embodiment of the present invention provides an on-load capacitance-adjusting voltage-regulating switch applied to a dry-type transformer, the on-load capacitance-adjusting voltage-regulating switch 20 is disposed above the dry-type transformer 10, the on-load capacitance-adjusting voltage-regulating switch 20 includes a switch housing 21 and an oil tank 22 wrapped outside the switch housing 21, a busbar 23 for wiring is disposed above the oil tank 22, a connecting member 30 for connecting with a tap 11 is disposed below the oil tank 22, and the tap 11 is disposed on the dry-type transformer 10;
The plant insulating oil is placed in the oil tank 22, the material of the oil tank is a steel plate with the thickness larger than 2mm, and the projection area size of the oil tank 22 does not exceed the area size of the dry transformer 10;
The ratio of the voltage of the dry-type transformer 10 wired with delta windings to the voltage of the dry-type transformer 10 wired with wye-connected windings is 
In the embodiment of the present invention, the oil tank 22 is made by welding steel plates as raw materials, and the protection grade of the oil tank 22 is greater than IP 67. The size of the oil tank 22 is 1330mm 980mm 1141 mm.
In an embodiment of the present invention, specifically, the ratio of the voltage of the high-voltage winding of the dry-type transformer 10 in delta connection to the voltage of the high-voltage winding of the dry-type transformer 10 in star connection is 
It should be noted that, since the ratio of the voltage of the high-voltage winding of the delta-connected dry transformer 10 to the voltage of the high-voltage winding of the star-connected dry transformer 10 is a voltage ratio, the voltage ratio is a voltage ratio 
Therefore, the voltage output by the dry-type transformer 10 is basically unchanged under the two modes of the large-capacity mode and the small-capacity mode of the dry-type transformer 10, and the capacity ratio of the dry-type transformer is close to 3: 1.
In the embodiment of the present invention, the busbar 23 is used for connecting with a load through a copper wire harness.
In the embodiment of the present invention, the tap 11 is connected to the oil tank 22 through the connecting member 30.
The connecting member 30 may preferably be a connecting pressing plate made of copper.
The embodiment of the utility model provides an in, the vegetable insulation oil has the characteristics oil of high ignition point, high flash point, just the electrical property of vegetable insulation oil accords with or is superior to the mineral oil technical standard commonly used completely, adopts vegetable insulation oil have to carry to transfer to hold tap-changer 20 and ordinary oily formula of joining in marriage to change and have to carry to transfer to hold tap-changer and compare need not do any change on the electrical safety distance of oil tank 22 internal switch, make it is not more than ordinary oily formula of joining in marriage the electrical safety distance of holding tap-changer 20 and has to carry to transfer to hold tap-changer, safe and reliable.
In the embodiment of the present invention, the oil tank 22 is wrapped and disposed on the outer wall surface of the switch casing 21, and the oil tank 22 is disposed above the dry transformer 10.
It should be noted that the oil tank 22 solves the problem that the conventional dry-type capacitance and voltage regulating switch is too large in size and cannot be applied to a narrow space such as a box transformer substation. And the oil tank 22 is in an overhead type, the size of the projection area is not more than that of the dry transformer 10, and compared with a laterally-arranged oil-immersed capacitance and voltage regulating switch for distribution transformation, the whole occupied area of the dry transformer 10 is smaller. Because the oil tank 22 sets up the top of doing the transformer 10 makes winding, iron core among the dry type transformer need not soak in the oil tank 22, gradually and reduce the volume of oil tank 22, consequently the dry-type transformer that has on-load capacitance-regulating tap changer 20 compares with the oil-immersed transformer of current adjustable volume pressure regulating, has greatly reduced the fire control hidden danger to improve the security performance who is applied to the on-load capacitance-regulating tap changer of dry-type transformer, make the dry-type transformer that has on-load capacitance-regulating tap changer 20 can be used in outdoor box-type substation, and this outdoor box-type substation can settle in the position that fire control requirements such as residential quarter, special industrial area are high, and the wide range of use that should be applied to the on-load capacitance-regulating tap changer of dry-type transformer has been widened.
The on-load capacity regulating voltage-regulating switch applied to the dry-type transformer is wrapped on the outer wall surface of the switch shell through the on-load capacity regulating voltage-regulating switch arranged above the dry-type transformer and the oil tank, so that the dry-type transformer with the on-load capacity regulating voltage-regulating switch is small in size, the transformer can be installed in an outdoor box-type substation, and the application range is wide; and because of the oil tank setting is in changing the formula transformer top futilely for winding, iron core among the change formula transformer futilely can not soak in the oil tank, also can reduce the volume of oil tank, consequently the dry-type transformer that has on-load accent holds the tap changer compares with current oil-immersed transformer that can adjust holding the pressure regulating, has greatly reduced the fire control hidden danger, thereby has improved the security performance who is applied to the on-load accent of dry-type transformer holds the tap changer. The technical problems of large volume or small volume, low safety performance and narrow application range of the existing on-load capacity and voltage regulating switch applied to the dry-type transformer are solved.
In an embodiment of the present invention, the switch housing 21 is installed with a capacitance-adjusting and voltage-adjusting switch, and the capacitance-adjusting and voltage-adjusting switch includes a vacuum bulb and a switch connected to the vacuum bulb.
It should be noted that the working principle, structure and connection relationship of the structural components of the capacity and voltage regulating switch are the same as or similar to the structure and working principle of a tapping switch of a dry-type on-load capacity regulating and voltage regulating transformer with publication number CN207587513U in the intellectual property office in 2018, 7, 6, and therefore are not described in this embodiment one by one.
In an embodiment of the present invention, the dry-type transformer 10 includes a winding connected to the tap 11, the winding includes a high-voltage winding and a low-voltage winding; wherein, the capacity of the dry-type transformer 10 is divided into a large capacity and a small capacity; when the capacity of the dry-type transformer 10 is the large capacity, the windings of the dry-type transformer 10 are connected by Dyn 11; when the capacity of the dry-type transformer 10 is the small capacity, the winding of the dry-type transformer 10 is wired by Yyn 0.
It should be noted that the capacitance and voltage regulating switch is mainly used for regulating the distribution ratio and the capacity of the dry-type transformer 10, and the selection of the capacity of the dry-type transformer 10 is realized by changing the tap position of the dry-type transformer 10. The capacity ratio of the dry-type transformer 10 is 3:1, the dry-type transformer 10 performs capacity switching through the on-load capacity regulating and voltage regulating switch 20, and the capacity of the dry-type transformer 10 is divided into two levels of large capacity and small capacity. Under the two modes of the large capacity and the small capacity, the high-voltage winding is the same as the winding of a common transformer, but the low-voltage winding is divided into three sections. When the capacity of the dry-type transformer 10 is the large capacity, the connection of the dry-type transformer 10 adopts a Dyn11 connection mode, and the equivalent of the low-voltage winding is 100%; when the capacity of the dry-type transformer 10 is small, the connection of the dry-type transformer 10 adopts a Yyn0 connection mode, and the equivalent of the low-voltage winding is 173%.
In one embodiment of the present invention, at least 9 taps are provided on the dry transformer 10.
In an embodiment of the present invention, at least 9 of the taps are disposed on the dry transformer 10.
Note that the range of adjustment of the tap 11 is ± 10%.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (7)
1. An on-load capacity and voltage regulating switch applied to a dry-type transformer is characterized by comprising an on-load capacity and voltage regulating switch arranged above the dry-type transformer, wherein the on-load capacity and voltage regulating switch comprises a switch shell and an oil tank wrapped outside the switch shell;
The dry transformer comprises an oil tank, a dry transformer and a power supply, wherein plant insulating oil is placed in the oil tank, the oil tank is made of a steel plate with the thickness larger than 2mm, and the projection area size of the oil tank does not exceed the area size of the dry transformer;
The ratio of the voltage of the dry-type transformer wired with delta windings to the voltage of the dry-type transformer wired with wye-connected windings is 
2. An on-load capacity and voltage regulating switch applied to a dry type transformer according to claim 1, wherein a capacity and voltage regulating switch is installed in the switch shell, and the capacity and voltage regulating switch comprises a vacuum bulb and a switch connected with the vacuum bulb.
3. The on-load capacitance and voltage regulating switch applied to a dry type transformer according to claim 1, wherein the dry type transformer comprises a winding, the winding is connected with the tap, and the winding comprises a high-voltage winding and a low-voltage winding;
The capacity of the dry-type transformer is divided into large capacity and small capacity; when the capacity of the dry-type transformer is the large capacity, the windings of the dry-type transformer are connected by Dyn 11; when the capacity of the dry-type transformer is the small capacity, the winding of the dry-type transformer is wired by Yyn 0.
4. The on-load capacitance and voltage regulating switch applied to the dry type transformer according to claim 1, wherein at least 9 taps are arranged on the dry type transformer.
5. An on-load capacity and voltage regulating switch applied to a dry type transformer according to claim 1, wherein the busbar is used for being connected with a load through a copper wire harness.
6. An on-load capacity and voltage regulating switch applied to a dry type transformer according to claim 1, wherein the connecting piece is a connecting pressing plate made of copper.
7. The on-load tap changer for dry transformers according to claim 1 wherein the tap adjustment range is ± 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922407425.5U CN211150353U (en) | 2019-12-27 | 2019-12-27 | On-load capacity and voltage regulating switch applied to dry type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922407425.5U CN211150353U (en) | 2019-12-27 | 2019-12-27 | On-load capacity and voltage regulating switch applied to dry type transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211150353U true CN211150353U (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922407425.5U Active CN211150353U (en) | 2019-12-27 | 2019-12-27 | On-load capacity and voltage regulating switch applied to dry type transformer |
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| Country | Link |
|---|---|
| CN (1) | CN211150353U (en) |
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- 2019-12-27 CN CN201922407425.5U patent/CN211150353U/en active Active
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