CN220455407U - Capacitive voltage divider and capacitive voltage transformer - Google Patents
Capacitive voltage divider and capacitive voltage transformer Download PDFInfo
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- CN220455407U CN220455407U CN202322047528.1U CN202322047528U CN220455407U CN 220455407 U CN220455407 U CN 220455407U CN 202322047528 U CN202322047528 U CN 202322047528U CN 220455407 U CN220455407 U CN 220455407U
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- 239000003990 capacitor Substances 0.000 claims abstract description 85
- 238000009413 insulation Methods 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims description 37
- 239000012212 insulator Substances 0.000 claims description 32
- 230000001502 supplementing effect Effects 0.000 claims description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 6
- 238000001125 extrusion Methods 0.000 abstract description 5
- 238000012797 qualification Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a capacitive voltage divider and a capacitive voltage transformer, wherein the capacitive voltage divider comprises an intermediate voltage wiring unit, a capacitive unit, an insulating unit, a height adjusting unit and a compensating unit; the bottom of the capacitor unit is connected with the top of the intermediate voltage wiring unit; the insulating unit is sleeved with the capacitor unit; the height adjusting unit is arranged in the insulating unit, and the bottom of the height adjusting unit is connected with the top of the capacitor unit; the compensation unit is arranged on the top of the insulation unit. The capacitor voltage transformer has the advantages that the height adjusting unit with adjustable height is arranged at the top of the capacitor unit to be matched with the height of the insulating unit, so that the height adjusting range of the capacitor unit is enlarged, meanwhile, the effective extrusion degree of the capacitor unit is guaranteed, meanwhile, the product performance of a product after transportation and transportation is effectively guaranteed, the qualification rate of the product is improved, and the problems that the capacitor stack of the conventional capacitor voltage transformer is unstable in tested product performance due to the defect of a fixing mode and the like are solved.
Description
Technical Field
The utility model relates to the technical field of voltage transformers, in particular to a capacitive voltage divider and a capacitive voltage transformer.
Background
The capacitive voltage transformer is a voltage transformer which divides primary voltage into lower intermediate voltage through a capacitive voltage divider and converts the lower intermediate voltage into standard secondary voltage through an intermediate transformer.
The capacitive voltage transformer is divided into a capacitive part and an electromagnetic part, the capacitor bears primary voltage, and the impulse voltage has high insulation level. The capacitive voltage divider can bear withstand voltage values required by standard requirements and clients and meet environmental requirements of operation sites, such as withstand voltage correction of insulators according to different altitudes, and reasonable design of capacitors is matched with the insulators according to conditions of the insulators. Under the sealing of the capacitor voltage divider, when the capacitor voltage divider is transported, the position of the capacitor stack cannot be greatly deviated, and the extrusion force applied to the capacitor stack cannot be changed too much, so that the residual space in the capacitor voltage divider is small, the capacitor stack in the capacitor is not easy to move, and in addition, the limit spring at the top end of the capacitor voltage divider can relieve the extrusion degree of the capacitor stack caused by up-and-down jolt in the transportation process.
The capacitor stacks in some existing capacitor voltage dividers have defects in the fixing mode or the adopted fixing method is poor, so that the capacitor stacks are easy to shift or deviate in the transportation or transfer process, the performance of a tested product is unstable, and the product is possibly damaged by serious people.
At present, no effective solution is proposed for solving the problems of unstable performance of a tested product and the like caused by the defect of a fixing mode of a capacitor stack in the related technology.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides a capacitive voltage divider and a capacitive voltage transformer, so as to solve the problems of unstable performance of a test product and the like caused by the defect of a fixing mode of a capacitive stack in the related art.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
in a first aspect, there is provided a capacitive voltage divider comprising:
an intermediate voltage wiring unit;
the bottom of the capacitor unit is connected with the top of the intermediate voltage wiring unit;
the insulation unit is sleeved with the capacitor unit, and the bottom of the insulation unit is connected with the top of the intermediate voltage wiring unit;
the height adjusting unit is arranged in the insulating unit, and the bottom of the height adjusting unit is connected with the top of the capacitor unit;
the compensating unit is arranged at the top of the insulating unit, and the bottom of the compensating unit is respectively connected with the top of the insulating unit and the top of the height adjusting unit and is used for supplementing insulating oil to the inside of the insulating unit.
In some of these embodiments, the intermediate voltage wiring unit includes:
the top of the intermediate voltage wiring terminal is respectively connected with the bottom of the capacitor unit and the bottom of the insulating unit;
the low-voltage capacitor lead is respectively connected with the intermediate voltage wiring terminal and the capacitor unit;
the first end of the connecting guide rod is arranged in the middle voltage wiring terminal, and the second end of the connecting guide rod is arranged in the insulating unit;
and the intermediate voltage lead is respectively connected with the connecting guide rod and the capacitor unit.
In some of these embodiments, the capacitive unit includes:
the capacitor element is arranged in the insulating unit and is respectively connected with the intermediate voltage wiring unit and the height adjusting unit;
a high-voltage lead connected to the capacitance element and the compensation unit, respectively;
the high-voltage connecting wire fixing piece is connected with the high-voltage lead wire and the compensation unit respectively.
Further, in some embodiments thereof, the capacitive unit further comprises:
and the connecting pieces are respectively connected with the adjacent two capacitance elements.
In some of these embodiments, the insulating unit includes:
the insulator is sleeved with the capacitor unit and is respectively connected with the intermediate voltage wiring unit and the compensation unit;
the lower flange is respectively connected with the insulator and the intermediate voltage wiring unit;
and the upper flange is respectively connected with the insulator and the compensation unit.
Further, in some embodiments thereof, the insulation unit further comprises:
and the insulating oil is arranged in the insulator.
In some of these embodiments, the height adjustment unit comprises:
the support is arranged in the insulating unit, and the bottom end of the support is connected with the top end of the capacitor unit;
and the limiting spring is respectively connected with the bracket and the compensation unit.
In some of these embodiments, the compensation unit comprises:
the compensating element is arranged on the top of the insulating unit;
and the sealing flange is respectively connected with the compensation element, the insulation unit and the height adjusting unit.
In some of these embodiments, further comprising:
and the sealing unit is arranged between the intermediate voltage wiring unit and the insulating unit and between the insulating unit and the compensation unit.
In some of these embodiments, further comprising:
the fastening unit is respectively connected with the intermediate voltage wiring unit, the capacitor unit, the insulating unit and the compensation unit.
In a second aspect, there is provided a capacitive voltage transformer comprising:
a capacitive voltage divider as recited in the first aspect;
the top of the electromagnetic device is connected with the bottom of the capacitive voltage divider;
and the primary terminal is connected with the top of the capacitive voltage divider.
Compared with the prior art, the utility model has the following technical effects:
according to the capacitive voltage divider and the capacitive voltage transformer, the height-adjustable height adjusting unit is arranged at the top of the capacitive unit to match with the height of the insulating unit, so that the height adjusting range of the capacitive unit is enlarged, meanwhile, the effective extrusion degree of the capacitive unit is guaranteed, meanwhile, the product performance of a product after transportation and transfer is effectively guaranteed, the qualification rate of the product is improved, and the problems that the performance of a tested product is unstable due to the fact that a capacitor stack of the conventional capacitive voltage transformer is defective due to a fixing mode are solved.
Drawings
FIG. 1 is a schematic diagram of a capacitive voltage divider according to an embodiment of the utility model;
FIG. 2 is a schematic diagram of an intermediate voltage wiring unit according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a capacitive unit according to an embodiment of the utility model;
fig. 4 is a schematic view of an insulation unit according to an embodiment of the present utility model;
FIG. 5 is a schematic view of a height adjustment unit according to an embodiment of the utility model;
FIG. 6 is a schematic diagram of a compensation unit according to an embodiment of the utility model;
FIG. 7 is a schematic view of a sealing unit according to an embodiment of the utility model;
fig. 8 is a schematic view of a fastening unit according to an embodiment of the present utility model;
fig. 9 is a schematic diagram of a capacitive voltage transformer according to an embodiment of the utility model.
Wherein the reference numerals are as follows: 100. a capacitive voltage divider;
110. an intermediate voltage wiring unit; 111. an intermediate voltage connection terminal; 112. a low voltage capacitor lead; 113. connecting a guide rod; 114. an intermediate voltage lead;
120. a capacitor unit; 121. a capacitive element; 122. a high voltage lead; 123. a high voltage wiring fixture; 124. a connecting sheet;
130. an insulation unit; 131. an insulator; 132. a lower flange; 133. an upper flange; 134. insulating oil;
140. a height adjusting unit; 141. a bracket; 142. a limit spring;
150. a compensation unit; 151. A compensation element; 152. A sealing flange;
160. a sealing unit; 161. A first sealing element; 162. A second sealing element;
170. a fastening unit; 171. a first fastening element; 172. a second fastening element; 173. a third fastening element; 174. a fourth fastening element; 175. a fifth fastening element; 176. a sixth fastening element;
200. an electromagnetic device;
300. a primary terminal.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
The utility model is further described below with reference to the drawings and specific examples, which are not intended to be limiting.
Example 1
This embodiment relates to a capacitive voltage divider of the present utility model.
In an exemplary embodiment of the present utility model, as shown in fig. 1, a capacitive voltage divider 100 includes an intermediate voltage wiring unit 110, a capacitive unit 120, an insulation unit 130, a height adjustment unit 140, and a compensation unit 150. Wherein the bottom of the capacitor unit 120 is connected with the top of the intermediate voltage wiring unit 110; the insulating unit 130 is sleeved with the capacitor unit 120, and the bottom of the insulating unit 130 is connected with the top of the intermediate voltage wiring unit 110; the height adjusting unit 140 is disposed inside the insulating unit 130, and the bottom of the height adjusting unit 140 is connected with the top of the capacitor unit 120; the compensating unit 150 is disposed at the top of the insulating unit 130, and the bottom of the compensating unit 150 is connected with the top of the insulating unit 130 and the top of the height adjusting unit 140, respectively, for supplementing the insulating oil 134 to the inside of the insulating unit 130.
As shown in fig. 2, the intermediate voltage connection unit 110 includes an intermediate voltage connection terminal 111, a low voltage capacitor lead 112, a connection guide 113, and an intermediate voltage lead 114. The top of the intermediate voltage connection terminal 111 is connected with the bottom of the capacitor unit 120 and the bottom of the insulating unit 130 respectively; the low-voltage capacitor lead 112 is connected to the intermediate-voltage connection terminal 111 and the capacitor unit 120, respectively; the first end of the connection guide 113 is disposed inside the intermediate voltage connection terminal 111, and the second end of the connection guide 113 is disposed inside the insulation unit 130; the intermediate voltage lead 114 is connected to the connection rod 113 and the capacitor unit 120, respectively.
The intermediate voltage connection terminal 111 is molded from epoxy resin.
Further, the intermediate voltage wiring unit 110 further includes a plurality of first mounting hole elements. The first mounting hole elements are disposed on the intermediate voltage connection terminal 111, and detachably connected to the insulating unit 130.
In some of these embodiments, the first plurality of mounting hole elements are disposed around the central axis of the intermediate voltage terminal 111.
In some of these embodiments, the first mounting hole elements are at least 3.
In some of these embodiments, the first mounting hole element is a through hole.
Further, the intermediate voltage connection unit 110 further includes a first connection element. The first connection element is disposed on top of the intermediate voltage connection terminal 111 and is used for connection with the insulation unit 130.
In some of these embodiments, the first connection element is disposed through the top of the intermediate voltage connection terminal 111.
In some of these embodiments, the first connecting element is annular in cross section.
In some of these embodiments, the first connecting element is a first groove.
The bottom end of the low-voltage capacitor lead 112 is connected to the top end of the voltage connection terminal 111, and the top end of the low-voltage capacitor lead 112 is connected to the side of the capacitor unit 120.
In some of these embodiments, the low voltage power lead 112 is securely connected to the intermediate voltage terminal 111.
The bottom of the connection rod 113 is inserted into the inside of the intermediate voltage connection terminal 111, and the top of the connection rod 113 protrudes from the top of the intermediate voltage connection terminal 111.
In some of these embodiments, the connection rod 113 is connected to the intermediate voltage connection terminal 111 by, but not limited to, a snap fit.
The bottom end of the intermediate voltage lead 114 is connected to the top end of the connection rod 113, and the top end of the intermediate voltage lead 114 is connected to the side of the capacitor unit 120.
In some of these embodiments, the intermediate voltage lead 114 is securely connected to the connecting rod 113.
As shown in fig. 3, the capacitor unit 120 includes at least one capacitor element 121, a high voltage lead 122 and a high voltage wire fixing member 123. The capacitor element 121 is disposed inside the insulating unit 130 and is connected to the intermediate voltage wiring unit 110 and the height adjusting unit 140, respectively; the high-voltage lead 122 is connected to the capacitor element 121 and the compensation unit 150, respectively; the high voltage wire fixing members 123 are connected to the high voltage leads 122 and the compensation unit 150, respectively.
Specifically, the bottom of the capacitor element 121 is connected to the tip of the intermediate voltage connection terminal 111, one side of the capacitor element 121 is connected to the tip of the intermediate voltage lead 112, and one side of the capacitor element 121 is connected to the tip of the intermediate voltage lead 114.
In some embodiments, the capacitive element 121 is connected to the intermediate voltage connection terminal 111 by, but not limited to, a snap-fit connection.
In some of these embodiments, capacitive element 121 is securely connected to low voltage capacitive lead 112, intermediate voltage lead 114.
In the case where the number of the capacitor elements 121 is plural, the plural capacitor elements 121 are stacked. Specifically, the bottom of one capacitive element 121 is connected to the top of the other capacitive element 121.
In some of these embodiments, capacitive element 121 is a capacitive stack.
The bottom end of the high voltage lead 122 is connected to the top end of the capacitor element 121, and the top end of the high voltage lead 122 is connected to the high voltage wiring fixing member 123.
In some of these embodiments, the high voltage wire fixture 123 is securely connected to the high voltage lead 122.
Further, in the case where the number of the capacitance elements 121 is several, the capacitance unit 120 further includes a connection piece 124. The connecting pieces 124 are connected to the adjacent two capacitance elements 121 respectively.
The number of connecting pieces 124 matches the number of capacitive elements 121. Typically, at least 2 connecting pads 124 are provided for each adjacent two of the capacitive elements 121.
In some of these embodiments, the connecting tab 124 is made of a metallic material.
As shown in fig. 4, the insulating unit 130 includes an insulator 131, a lower flange 132, and an upper flange 133. The insulator 131 is sleeved with the capacitor unit 120 and is respectively connected with the intermediate voltage wiring unit 110 and the compensation unit 150; the lower flange 132 is connected with the insulator 131 and the intermediate voltage wiring unit 110 respectively; the upper flange 133 is connected to the insulator 131 and the compensation unit 150, respectively.
Specifically, the insulator 131 is disposed to cover the capacitor element 121; the lower flange 132 is connected to the intermediate voltage connection terminal 111.
The lower flange 132 is sleeved outside the insulator 131, and the bottom end surface of the lower flange and the end surface of the insulator 131 are positioned on the same horizontal plane.
In some of these embodiments, lower flange 132 is adhesively attached to insulator 131.
The upper flange 133 is sleeved outside the insulator 131, and the top end surface of the upper flange is positioned at the same horizontal plane with the end surface of the insulator 131.
In some of these embodiments, the upper flange 133 is adhesively attached to the insulator 131.
Further, the insulating unit 130 further includes a plurality of second mounting hole elements. The second mounting hole elements are disposed on the lower flange 132, and detachably connected to the intermediate voltage connection terminals 111.
In some of these embodiments, a plurality of second mounting hole elements are disposed circumferentially about the central axis of lower flange 132.
The number of second mounting hole elements matches the number of first mounting hole elements. Typically, the number of second mounting hole elements is equal to the number of first mounting hole elements, i.e. the second mounting hole elements are in one-to-one correspondence with the first mounting hole elements.
In some of these embodiments, the second mounting hole element is a through hole.
Further, the insulating unit 130 further includes a plurality of third mounting hole elements. Wherein, a plurality of third mounting hole elements are separately disposed on the upper flange 133 and detachably connected with the compensation unit 150, respectively.
In some of these embodiments, a plurality of third mounting hole elements are disposed circumferentially about the central axis of the flange 133.
In some of these embodiments, the third mounting hole elements are at least 3.
In some of these embodiments, the third mounting hole element is a through hole.
Further, the insulating unit 130 further includes insulating oil 134. Wherein the insulating oil 134 is disposed inside the insulator 131.
As shown in fig. 5, the height adjusting unit 140 includes a bracket 141 and a limit spring 142. Wherein, the bracket 141 is arranged in the insulating unit 130, and the bottom end of the bracket 141 is connected with the top end of the capacitor unit 120; the limit spring 142 is connected with the bracket 141 and the compensation unit 150, respectively.
Specifically, the bracket 141 is disposed inside the insulator 131, and the bottom end of the bracket 141 is connected to the top end of the capacitive element 121.
In some of these embodiments, the bracket 141 is bolted to the capacitive element 121.
The height of the bracket 141 is smaller than the difference between the height of the insulator 131 and the sum of the heights of the plurality of capacitive elements 121.
In some of these embodiments, the stent 141 comprises a longitudinal stent and a transverse stent. Wherein the bottom end of the longitudinal support is connected with the top end of the capacitive element 121; the transverse support is perpendicular to the longitudinal support, and the midpoint of the transverse support is connected with the top end of the longitudinal support.
In some of these embodiments, the bracket 141 is an adjustment bracket.
The limit spring 142 is disposed at the top end of the bracket 141. Specifically, the limiting spring 142 is disposed at the top end of the lateral bracket.
In some of these embodiments, the spacing springs 142 are several. A plurality of limiting springs 142 are circumferentially arranged at the top end of the transverse bracket.
In some of these embodiments, the limit springs 142 are 2. Specifically, 2 limit springs 142 are symmetrically disposed at the top end of the lateral bracket.
In some of these embodiments, the stop spring 142 is bolted to the bracket 141.
As shown in fig. 6, the compensating unit 150 includes a compensating element 151 and a sealing flange 152. Wherein the compensating element 151 is disposed on top of the insulating unit 130; the sealing flange 152 is connected to the compensating element 151, the insulating unit 130, and the height adjusting unit 140, respectively.
Specifically, the compensating element 151 is disposed on top of the insulator 131; the sealing flange 152 is connected to the upper flange 133 and the stopper spring 142, respectively.
In some of these embodiments, the compensating element 151 is a compensating device.
The bottom of the sealing flange 152 abuts the top of the stop spring 142.
The sealing flange 152 is sized to match the size of the upper flange 133. Typically, the diameter of the sealing flange 152 is equal to the diameter of the upper flange 133.
Further, in some of these embodiments, the compensation unit 150 further includes a number of fourth mounting hole elements and a fifth mounting hole element. Wherein, a plurality of fourth mounting hole elements are distributed on the sealing flange 152 and are detachably connected with the upper flange 133 respectively; the fifth mounting hole element is provided at the bottom of the sealing flange 152 and is detachably connected to the high voltage lead 122.
A number of fourth mounting hole elements are circumferentially arranged about the central axis of the sealing flange 152.
The number of fourth mounting hole elements matches the number of third mounting hole elements. Generally, the number of the fourth mounting hole elements is equal to the number of the third mounting hole elements, i.e., the fourth mounting hole elements are in one-to-one correspondence with the third mounting hole elements.
In some of these embodiments, the fourth mounting hole element is a through hole.
The fifth mounting hole is located at the edge of the sealing flange 152.
In some of these embodiments, the fifth mounting hole element is a threaded hole.
Further, the compensation unit 150 further comprises a second connection element. The second connecting element is disposed at the bottom of the sealing flange 152, and is used for connecting the insulating unit 130.
In some of these embodiments, a second connecting element is disposed through the top of the sealing flange 152.
In some of these embodiments, the second connecting element is annular in cross-section.
In some of these embodiments, the second connecting element is a second groove.
Further, the capacitive voltage divider 100 further comprises a sealing unit 160. The sealing unit 160 is disposed between the intermediate voltage connection unit 110 and the insulation unit 130 and between the insulation unit 130 and the compensation unit 150.
As shown in fig. 7, the sealing unit 160 includes a first sealing member 161 and a second sealing member 162. Wherein the first sealing member 161 is disposed between the intermediate voltage wiring unit 110 and the insulating unit 130; the second sealing member 162 is disposed between the insulation unit 130 and the compensation unit 150.
Specifically, the first sealing member 161 is disposed between the first connecting member and the insulator 131; the second sealing member 162 is disposed between the insulator 131 and the second connection member.
The first sealing member 161 has a cross-sectional width equal to or less than that of the first connecting member.
The first sealing member 161 has a cross-sectional height greater than the depth of the first connecting member.
In some of these embodiments, the first sealing element 161 is made of an elastic material, including but not limited to rubber or the like.
The second sealing member 162 has a cross-sectional width that is less than or equal to the cross-sectional width of the second connecting member.
The cross-sectional height of the second sealing element 162 is greater than the depth of the second connecting element.
In some of these embodiments, the second sealing element 162 is made of an elastic material, including but not limited to rubber or the like.
Further, the capacitive voltage divider 100 further comprises a fastening unit 170. The fastening unit 170 is connected to the intermediate voltage connection unit 110, the capacitor unit 120, the insulation unit 130, and the compensation unit 150, respectively.
As shown in fig. 8, the fastening unit 170 includes a first fastening member 171, a second fastening member 172, a third fastening member 173, a fourth fastening member 174, a fifth fastening member 175, and a sixth fastening member 176. Wherein the first fastening element 171 is detachably connected to the intermediate voltage connection unit 110; the second fastening element 172 is detachably connected to the intermediate-voltage wiring unit 110; the third fastening element 173 is detachably connected with the intermediate voltage wiring unit 110 and the insulating sheet, respectively; the fourth fastening element 174 is detachably connected to the capacitive unit 120; the fifth fastening element 175 is detachably connected with the insulation unit 130 and the compensation unit 150, respectively; the sixth fastening element 176 is detachably connected to the capacitive unit 120.
Specifically, the first fastening element 171 is detachably connected to the intermediate voltage connection terminal 111, the low-voltage capacitor lead 112, respectively; the second fastening element 172 is detachably connected to the connecting rod 113 and the intermediate voltage lead 114, respectively; the third fastening element 173 is detachably connected with the first mounting hole element and the second mounting hole element respectively; the fourth fastening element 174 is detachably connected to the capacitor element 121 and the high-voltage lead 122, respectively; the fifth fastening element 175 is detachably connected to the third mounting hole element and the fourth mounting hole element, respectively; the sixth fastening element 176 is detachably connected to the corresponding connecting piece 124.
In some of these embodiments, the first fastening element 171 is a set of bolts.
In some of these embodiments, the second fastening element 172 is a set of bolts.
The number of third fastening elements 173 matches the number of first mounting hole elements. Generally, the number of third fastening elements 173 is equal to the number of first mounting hole elements, i.e. the third fastening elements 173 are in one-to-one correspondence with the first mounting hole elements.
In some of these embodiments, the third fastening element 173 is a set of bolts.
In some of these embodiments, the fourth fastening element 174 is a set of bolts.
The number of fifth fastening elements 175 matches the number of third mounting hole elements. Generally, the number of fifth fastening elements 175 is equal to the number of third mounting hole elements, i.e., the fifth fastening elements 175 are in one-to-one correspondence with the third mounting hole elements.
In some of these embodiments, the fifth fastening element 175 is a set of bolts.
The number of sixth fastening elements 176 matches the number of capacitive elements 121 and is an even number. Generally, 1 capacitive element 121 corresponds to at least 4 sixth fastening elements 176. Specifically, at least 2 sixth fastening elements 176 are provided at each of the top and bottom ends of 1 capacitive element 121.
In some of these embodiments, 1 capacitive element 121 corresponds to 4 sixth fastening elements 176. Specifically, 2 sixth fastening elements 176 are provided at each of the top and bottom ends of 1 capacitive element 121.
In some of these embodiments, the sixth fastening element 176 includes, but is not limited to, a bolt.
The utility model has the advantages that the height adjusting unit with adjustable height is arranged at the top of the capacitor unit to match with the height of the insulating unit, so that the height adjusting range of the capacitor unit is enlarged, the effective extrusion degree of the capacitor unit is ensured, the product performance of the product after transportation and transfer is effectively ensured, the qualification rate of the product is improved, and the problems of unstable test product performance and the like caused by the defect of the fixing mode of the capacitor stack of the conventional capacitor voltage transformer are solved.
The utility model has the following technical effects:
1) The capacitor stacks are fixed in groups, so that detection and assembly are convenient;
2) The insulating flange on the capacitive voltage divider is unique in design, so that the capacitive unit and the electromagnetic unit of the capacitive voltage transformer are fully ensured to be isolated and separated;
3) The limit spring and the adjusting bracket are designed, so that the adjustment range of the height of the capacitor stack in the determined insulator is enlarged;
4) The capacitive divider has a compact internal structure, and a capacitive stack is not easy to move, so that the quality and performance of capacitive division are ensured;
5) The space between the insulator and the capacitor stack is very small, so that the use of insulating oil is reduced;
6) The capacitive voltage divider is simple to assemble and convenient to produce. According to different voltage levels, the capacitive divider can be assembled by sections of the same or different insulators, so that the capacitive divider is convenient to assemble and transport.
Example 2
This embodiment relates to a capacitive voltage transformer of the present utility model.
As shown in fig. 9, a capacitive voltage transformer includes a capacitive voltage divider 100, an electromagnetic device 200, and a primary terminal 300 as described in embodiment 1. Wherein the top of the electromagnetic device 200 is connected with the bottom of the capacitive voltage divider 100; the primary terminal 300 is connected to the top of the capacitive voltage divider 100.
Specifically, the top of the electromagnetic device 200 is connected to the intermediate voltage wiring unit 110; the primary terminal 300 is connected to the top of the compensation unit 150.
More specifically, the top of the electromagnetic device 200 is connected to the connection rod 113; the primary terminal 300 is connected to the top of the compensating element 151.
The utility model has the advantages that the connecting guide rod is fixed on the intermediate voltage wiring terminal, the lower end is also connected with the intermediate voltage terminal of the electromagnetic device, and the upper end is connected with the capacitive voltage division terminal, so that the connection is reliable and the installation is convenient.
The foregoing description is only illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the scope of the utility model, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present utility model, and are intended to be included within the scope of the present utility model.
Claims (10)
1. A capacitive voltage divider, comprising:
an intermediate voltage wiring unit;
the bottom of the capacitor unit is connected with the top of the intermediate voltage wiring unit;
the insulation unit is sleeved with the capacitor unit, and the bottom of the insulation unit is connected with the top of the intermediate voltage wiring unit;
the height adjusting unit is arranged in the insulating unit, and the bottom of the height adjusting unit is connected with the top of the capacitor unit;
the compensating unit is arranged at the top of the insulating unit, and the bottom of the compensating unit is respectively connected with the top of the insulating unit and the top of the height adjusting unit and is used for supplementing insulating oil to the inside of the insulating unit.
2. The capacitive voltage divider of claim 1, wherein the intermediate voltage wiring unit comprises:
the top of the intermediate voltage wiring terminal is respectively connected with the bottom of the capacitor unit and the bottom of the insulating unit;
the low-voltage capacitor lead is respectively connected with the intermediate voltage wiring terminal and the capacitor unit;
the first end of the connecting guide rod is arranged in the middle voltage wiring terminal, and the second end of the connecting guide rod is arranged in the insulating unit;
and the intermediate voltage lead is respectively connected with the connecting guide rod and the capacitor unit.
3. The capacitive voltage divider of claim 1, wherein the capacitive unit comprises:
the capacitor element is arranged in the insulating unit and is respectively connected with the intermediate voltage wiring unit and the height adjusting unit;
a high-voltage lead connected to the capacitance element and the compensation unit, respectively;
the high-voltage connecting wire fixing piece is connected with the high-voltage lead wire and the compensation unit respectively.
4. A capacitive voltage divider according to claim 3, characterized in that in case the capacitive elements are several, the capacitive unit further comprises:
and the connecting pieces are respectively connected with the adjacent two capacitance elements.
5. The capacitive voltage divider of claim 1, wherein the insulating unit comprises:
the insulator is sleeved with the capacitor unit and is respectively connected with the intermediate voltage wiring unit and the compensation unit;
the lower flange is respectively connected with the insulator and the intermediate voltage wiring unit;
and the upper flange is respectively connected with the insulator and the compensation unit.
6. The capacitive voltage divider of claim 5, wherein the insulating unit further comprises:
and the insulating oil is arranged in the insulator.
7. The capacitive voltage divider of claim 1, wherein the height adjustment unit comprises:
the support is arranged in the insulating unit, and the bottom end of the support is connected with the top end of the capacitor unit;
and the limiting spring is respectively connected with the bracket and the compensation unit.
8. The capacitive voltage divider of claim 1, wherein the compensation unit comprises:
the compensating element is arranged on the top of the insulating unit;
and the sealing flange is respectively connected with the compensation element, the insulation unit and the height adjusting unit.
9. The capacitive voltage divider of any one of claims 1-8, further comprising:
the sealing unit is arranged between the intermediate voltage wiring unit and the insulating unit and between the insulating unit and the compensating unit; and/or
The fastening unit is respectively connected with the intermediate voltage wiring unit, the capacitor unit, the insulating unit and the compensation unit.
10. A capacitive voltage transformer, comprising:
a capacitive voltage divider as claimed in any one of claims 1 to 9;
the top of the electromagnetic device is connected with the bottom of the capacitive voltage divider;
and the primary terminal is connected with the top of the capacitive voltage divider.
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