CA2007665A1 - Capacitive voltage transformer - Google Patents
Capacitive voltage transformerInfo
- Publication number
- CA2007665A1 CA2007665A1 CA 2007665 CA2007665A CA2007665A1 CA 2007665 A1 CA2007665 A1 CA 2007665A1 CA 2007665 CA2007665 CA 2007665 CA 2007665 A CA2007665 A CA 2007665A CA 2007665 A1 CA2007665 A1 CA 2007665A1
- Authority
- CA
- Canada
- Prior art keywords
- capacitive voltage
- transformer
- divider
- casting resin
- voltage divider
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/04—Voltage dividers
- G01R15/06—Voltage dividers having reactive components, e.g. capacitive transformer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/24—Voltage transformers
- H01F38/26—Constructions
-
- 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
- H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
- H01F2029/143—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias with control winding for generating magnetic bias
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Insulating Of Coils (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A capacitive voltage transformer, comprising a capacitive voltage divider to whose divider point there are connected a resonance reaction coil and an intermediate transformer. The intermediate transformer constitutes an open-air resistant structural element which completely integrates its active components (windings and iron core) and can be connected directly to the capacitive voltage divider. Thus the secondary winding of the intermediate transformer is connected first to the divider point of the capacitive voltage divider and, in series with at least one component of the secondary winding of the intermediate transformer. The secondary winding of the resonance reaction coil is then added as a higher stage. Finally the intermediate transformer with all the winding and core components is sealed in an open air-resistant casting resin block, which carries the voltage divider and is flanged thereto.
A capacitive voltage transformer, comprising a capacitive voltage divider to whose divider point there are connected a resonance reaction coil and an intermediate transformer. The intermediate transformer constitutes an open-air resistant structural element which completely integrates its active components (windings and iron core) and can be connected directly to the capacitive voltage divider. Thus the secondary winding of the intermediate transformer is connected first to the divider point of the capacitive voltage divider and, in series with at least one component of the secondary winding of the intermediate transformer. The secondary winding of the resonance reaction coil is then added as a higher stage. Finally the intermediate transformer with all the winding and core components is sealed in an open air-resistant casting resin block, which carries the voltage divider and is flanged thereto.
Description
The present invention relates to a capacitive voltage transformer, comprising a capacitive voltage divider, a resonance reaction coil and an intermediate transformer connected to the divider point of said voltage divider at least the secondary winding of the intermediate transformer being sealed in casting resin.
!;
This type of voltage transformer is disclosed in DE-AS
12 41 908; the windings of the intermediate transformer and particular by its secondary windings are embedded in casting resin. On its upper end this cast resin block has a flange with l.U which it abuts against the earthed casing and on which the capacitive voltage divider is secured by means of a porcelain insulator encompassing-the capacitive voltage divider.
Insulating oil is used as impregnating and insulating agent for the capacitive voltage divider.
1~
A capacitive voltage transformer of a different type is described in DE-PS 15 41 800, wherein the resonance reaction coil is inserted between the divider point of high and low voltage -2U side divider capacitor of the voltage divider and theintermediate transformer and thus lies on high voltage potential of the order of 20 kV. As usual, the intermediate transformer is connected in series with the resonance reaction coil.
The present invention provides a capacitive voltage 2~ transformer of the type initlally described with which a rational production of all the transformer components is achieved and in particular a type of construction of all the individual components that is safe to operate and at the same time externally compact, i.e., of the voltage divider, of the 3~ resonance reaction coil and of the intermediate transformer, is to be attained.
According to the present invention there is provided a capacitive voltage transformer, comprising a capacitive voltage .,, ~, ,. . .
",, . ~ ~
20~7665 divider, a resonance reaction coil and an intermediate transformer connected to the divider point of said voltage divider at least the secondary winding of the lntermediate transformer being sealed in casting resin in which the secondary winding of the intermediate transformer is connected first to the divider point of the capacitive voltage transformer, in series !i with at least one component of the secondary winding of the intermediate transformer, the secondary winding of the resonance reaction coil is then added as a higher stage, the intermediate transformer with all the winding and core components is sealed in an open air-resistant casting resin block and the casting resin u block carries the voltage divider and is flanged thereto.
The present invention is distinguished particularly by the fact that the intermediate transformer constitutes an open air-resistant structural element that completely integrates its 1~ active components (windings and iron core) and that this element be connected directly with the capacitive voltage divider. Not only is the intermediate transformer electrically connected directly to the divider point of the capacitive voltage divider, but, contrary to the prior art particularly DE-AS 12 41 908, it ~U is virtually taken out of the earthed metallic casing. The intermediate transformer thus forms an electrically and mechanically independent unit, which can be produced separately, pretested and connected in a simple manner to the other units of the capacitive voltage transformer according to the present 2~ invention, namely to the capacitive voltage divider and to the metal casing for the resonance reaction coil.
In one embodiment of the present invention below said casting resin block there is a free space which is defined by a 3U metal casing for housing the resonance reaction coil. Desirably said surface of the casting resin block is provided with metallization which is connected to the metal casing on the earth potential so as to be electrically conducting.
~ ,~
.~
, - , 2~ 766S
In another embodiment of the present invention the gas-or liquid-impregnated divider capacitors of the capacitive voltage divider are completely encompassed by a casting resin casing, said casting resin casing being applied in uphill casting while displacing the gaseous or liquid insulating agent in the casting mould. Suitably ribs are provided on the casting resin !.i sheathing of the voltage divider, said ribs forming a single homogeneous body with the casting resin sheathing or being separately connected to the casting resin sheathing. Desirably the electric connection between the capacitive voltage divider and the secondary winding of the intermediate transformer is obtained via a plug contact pin.
The present invention will be further illustrated with reference to the accompanying drawings in which:
Figure 1 is a lateral view of a capacitive voltage transformer according to one embodiment of the present invention in transverse section;
2U Figure 2 is a top plan view of the voltage divider of Figure l; and Figure 3 illustrates the corresponding circuit for the capacitive voltage transformer of Figures 1 and 2.
The capacitive voltage transformer 1 comprises two divider capacitors 3 and 4 forming a capacit~ve voltage divider 2, which divider capacitors 3 and 4 are superposed and flanged with one another in a conventional manner. The divider capacitors 3 and 4 are secured to a casting resin block 5 so as 3U to be impervious to gas and liquid, particularly they are sealingly screwed thereto. The casting resin block 5 of open air-resistant casting resin, particularly of cycloaliphatic casting resin, completely envelops the active components, i.e., the secondary windings 7 (not separately shown) including the ~ t~
2~ 7~;6~
corresponding iron core 8 of the intermediate transformer 6.
A metal casing 9 at earth potential is provided under the casting resin block 5. The metal casing 9 includes a free space 10 for housing the resonance reaction coil 11 required for !i the capacitive voltage transformer. With its one winding end said resonance reaction coil 11 is connected to ground or earth potential as is evident from the electric circuit diagram in Figure 3. Therefore, the entire resonance reaction coil 11 lies on low voltage or earth potential.
:l.u The surface of the casting resin block 5, namely, the lateral faces 5a and 5b and the upper front surface 5c, are provided with a conductive coating 12 at earth potential, preferably of an electrically conducting metallization, which is 1~ so connected to the metal casing 9 at earth potential that it is electrically conducting.
Each of the divider capacitors 3 and 4 of the 2U capacitive voltage divider 2 consists of windings or of a stack of winding bodies, which are impregnated or saturated with an insulating medium. A casting resin sheathing 13 is provided as a sheathing for said divider capacitors 3 and 4. The sheathing 13 is produced, when required in a broken mould, in that the divider capacitors 3 and 4 are lmpregnated with the insulating medium (liquid or gaseous) in the mould and that casting resin is introduced into the casting mould from below. The casting resin thus introduced rises in the casting form and displaces the saturating or insulating medium to the extent required for the necessary impregnation. By means of this conventional 3U displacement or uphill casting a substantial amount of impregnating or saturating medium is saved in the finished voltage divider 2 and in the divider capacitors 3 and 4.
On the outside of the casting resin sheathing 13 ribs ~. -"' . , ' ,, .
2~ 7Ç~6~
14 are provided in a conventional manner. They can be moulded on simultaneously with the production of the casting resin sheathing 13 so that said sheathing and the ribs 14 form a single body of homogeneous material.
However the ribs 14 can also be subsequently installed !; on the casting resin sheathing 13 of the two divider capacitors 3 and 4 particularly with the use of silicone resin.
The special advantage of using the so-called dlsplacement and uphlll casting method lles ln that the amount of u impregnating agent required for the impregnation of the divider capacitors 3 and 4 is reduced to a minlmum so that the capacitive voltage divider 2 either requires no conservator tank at all or it requires one having only a minimal volume. An electrically conducting hollow screening ring, which usually is flanged 1~ between the two divider capacitors 3 and 4, is particularly suitable for this purpose.
Figure 2 shows the above-described capacitive voltage 2U transformer 1 in top view. In this representation the arrangement of fixed feet lS, of the clamp box 16 and of the power line carrier 17 can be clearly seen. Furthermore, the individual components of Figure 2 have the same reference numbers as those in Figure 1.
2~ A circuit of the capacitive voltage transformer according to the present invention is diagrammatically shown in Figure 3. In this Figure the capacitive voltage divider again has the reference number 2 and comprises the divider capacitors 3 and 4. TP denotes the voltage tap for the direct connection of 3U the intermediate transformer 6 to the capacitive voltage divider ~ `
2. In this case the intermediate transformer, which is directly electrically connected to the voltage tap TP, has two secondary windings 7 and two measuring windings 18, 19 while the resonance reaction coil 11 connected in series with the intermediate ,. ~, . , .. . - .
,.i,, ,.. '.. ','' ~, ";: ~, .', . .. ' 2~ 766 transformer 6 has one measuring or control winding 20.
The electric connection between the capacitive voltage divider 2 and the intermediate transformed 6 is obtained via a plug contact pin 21, when required via a multicontact of conventional design. In Figure 1 an electric feed line 22 has !.i been additionally plotted. Said feed line 22 impresse~ the potential of customarily 20 kV on the intermediate transformer 6 at the divider point TP between the divider capacitors 3 and 4.
A further electric line 22 shown in Figure 1 connects the conductive coating 12 of the casting resin block 5 to the end of the divider capacitor 4 that lies on earth potential.
The casting resin sheathing 13 of the divider capacitors 3 and 4 preferably consists of elastic casting resin, particularly of polyurethane, which can absorb the thermal expansions of the quantitatively extremely small impregnating agent without requiring an additional conservator tank. However, as briefly mentioned hereinbefore, a conservator tank of mall volume can be provided, particularly as annular screening electrode at the junction between the divider capacitors 3 and 4.
A particularly distinguishing feature of the capacitive voltage transformer according to the present invention is that all the components, namely the capacitive voltage divider 2, the intermediate transformer 6 and the resonance reaction coil 11 can 2~ be produced and pretested separately and on having passed the preliminary test they can be mounted ~ointly in the simplest manner. The casting resin technology used for both the voltage divider 2 and the intermediate transformer 6 is on a very high technological level so that the breakdown quota is very low from 3U the outset and can even be reduced further by prefabricating these components. With the casting resin technology applied the sizes of the capacitive voltage divider 2 and of the intermediate transformer 6 can be reduced to optimal values. Furthermore because the resonance reaction coil 11 is series-connected and is .:
~ , :, , ' .
2~ ,.D7665 housed in the metal casing 9, the dimensions of the resonance reaction coil 11 can also be reduced to a minimum.
Thus not only is the capacitive voltage transformer according to the present invention distinguished by a high degree of operating reliability but it is also distinguished by an extremely compact construction.
:I.u 2~ :
~ :
!;
This type of voltage transformer is disclosed in DE-AS
12 41 908; the windings of the intermediate transformer and particular by its secondary windings are embedded in casting resin. On its upper end this cast resin block has a flange with l.U which it abuts against the earthed casing and on which the capacitive voltage divider is secured by means of a porcelain insulator encompassing-the capacitive voltage divider.
Insulating oil is used as impregnating and insulating agent for the capacitive voltage divider.
1~
A capacitive voltage transformer of a different type is described in DE-PS 15 41 800, wherein the resonance reaction coil is inserted between the divider point of high and low voltage -2U side divider capacitor of the voltage divider and theintermediate transformer and thus lies on high voltage potential of the order of 20 kV. As usual, the intermediate transformer is connected in series with the resonance reaction coil.
The present invention provides a capacitive voltage 2~ transformer of the type initlally described with which a rational production of all the transformer components is achieved and in particular a type of construction of all the individual components that is safe to operate and at the same time externally compact, i.e., of the voltage divider, of the 3~ resonance reaction coil and of the intermediate transformer, is to be attained.
According to the present invention there is provided a capacitive voltage transformer, comprising a capacitive voltage .,, ~, ,. . .
",, . ~ ~
20~7665 divider, a resonance reaction coil and an intermediate transformer connected to the divider point of said voltage divider at least the secondary winding of the lntermediate transformer being sealed in casting resin in which the secondary winding of the intermediate transformer is connected first to the divider point of the capacitive voltage transformer, in series !i with at least one component of the secondary winding of the intermediate transformer, the secondary winding of the resonance reaction coil is then added as a higher stage, the intermediate transformer with all the winding and core components is sealed in an open air-resistant casting resin block and the casting resin u block carries the voltage divider and is flanged thereto.
The present invention is distinguished particularly by the fact that the intermediate transformer constitutes an open air-resistant structural element that completely integrates its 1~ active components (windings and iron core) and that this element be connected directly with the capacitive voltage divider. Not only is the intermediate transformer electrically connected directly to the divider point of the capacitive voltage divider, but, contrary to the prior art particularly DE-AS 12 41 908, it ~U is virtually taken out of the earthed metallic casing. The intermediate transformer thus forms an electrically and mechanically independent unit, which can be produced separately, pretested and connected in a simple manner to the other units of the capacitive voltage transformer according to the present 2~ invention, namely to the capacitive voltage divider and to the metal casing for the resonance reaction coil.
In one embodiment of the present invention below said casting resin block there is a free space which is defined by a 3U metal casing for housing the resonance reaction coil. Desirably said surface of the casting resin block is provided with metallization which is connected to the metal casing on the earth potential so as to be electrically conducting.
~ ,~
.~
, - , 2~ 766S
In another embodiment of the present invention the gas-or liquid-impregnated divider capacitors of the capacitive voltage divider are completely encompassed by a casting resin casing, said casting resin casing being applied in uphill casting while displacing the gaseous or liquid insulating agent in the casting mould. Suitably ribs are provided on the casting resin !.i sheathing of the voltage divider, said ribs forming a single homogeneous body with the casting resin sheathing or being separately connected to the casting resin sheathing. Desirably the electric connection between the capacitive voltage divider and the secondary winding of the intermediate transformer is obtained via a plug contact pin.
The present invention will be further illustrated with reference to the accompanying drawings in which:
Figure 1 is a lateral view of a capacitive voltage transformer according to one embodiment of the present invention in transverse section;
2U Figure 2 is a top plan view of the voltage divider of Figure l; and Figure 3 illustrates the corresponding circuit for the capacitive voltage transformer of Figures 1 and 2.
The capacitive voltage transformer 1 comprises two divider capacitors 3 and 4 forming a capacit~ve voltage divider 2, which divider capacitors 3 and 4 are superposed and flanged with one another in a conventional manner. The divider capacitors 3 and 4 are secured to a casting resin block 5 so as 3U to be impervious to gas and liquid, particularly they are sealingly screwed thereto. The casting resin block 5 of open air-resistant casting resin, particularly of cycloaliphatic casting resin, completely envelops the active components, i.e., the secondary windings 7 (not separately shown) including the ~ t~
2~ 7~;6~
corresponding iron core 8 of the intermediate transformer 6.
A metal casing 9 at earth potential is provided under the casting resin block 5. The metal casing 9 includes a free space 10 for housing the resonance reaction coil 11 required for !i the capacitive voltage transformer. With its one winding end said resonance reaction coil 11 is connected to ground or earth potential as is evident from the electric circuit diagram in Figure 3. Therefore, the entire resonance reaction coil 11 lies on low voltage or earth potential.
:l.u The surface of the casting resin block 5, namely, the lateral faces 5a and 5b and the upper front surface 5c, are provided with a conductive coating 12 at earth potential, preferably of an electrically conducting metallization, which is 1~ so connected to the metal casing 9 at earth potential that it is electrically conducting.
Each of the divider capacitors 3 and 4 of the 2U capacitive voltage divider 2 consists of windings or of a stack of winding bodies, which are impregnated or saturated with an insulating medium. A casting resin sheathing 13 is provided as a sheathing for said divider capacitors 3 and 4. The sheathing 13 is produced, when required in a broken mould, in that the divider capacitors 3 and 4 are lmpregnated with the insulating medium (liquid or gaseous) in the mould and that casting resin is introduced into the casting mould from below. The casting resin thus introduced rises in the casting form and displaces the saturating or insulating medium to the extent required for the necessary impregnation. By means of this conventional 3U displacement or uphill casting a substantial amount of impregnating or saturating medium is saved in the finished voltage divider 2 and in the divider capacitors 3 and 4.
On the outside of the casting resin sheathing 13 ribs ~. -"' . , ' ,, .
2~ 7Ç~6~
14 are provided in a conventional manner. They can be moulded on simultaneously with the production of the casting resin sheathing 13 so that said sheathing and the ribs 14 form a single body of homogeneous material.
However the ribs 14 can also be subsequently installed !; on the casting resin sheathing 13 of the two divider capacitors 3 and 4 particularly with the use of silicone resin.
The special advantage of using the so-called dlsplacement and uphlll casting method lles ln that the amount of u impregnating agent required for the impregnation of the divider capacitors 3 and 4 is reduced to a minlmum so that the capacitive voltage divider 2 either requires no conservator tank at all or it requires one having only a minimal volume. An electrically conducting hollow screening ring, which usually is flanged 1~ between the two divider capacitors 3 and 4, is particularly suitable for this purpose.
Figure 2 shows the above-described capacitive voltage 2U transformer 1 in top view. In this representation the arrangement of fixed feet lS, of the clamp box 16 and of the power line carrier 17 can be clearly seen. Furthermore, the individual components of Figure 2 have the same reference numbers as those in Figure 1.
2~ A circuit of the capacitive voltage transformer according to the present invention is diagrammatically shown in Figure 3. In this Figure the capacitive voltage divider again has the reference number 2 and comprises the divider capacitors 3 and 4. TP denotes the voltage tap for the direct connection of 3U the intermediate transformer 6 to the capacitive voltage divider ~ `
2. In this case the intermediate transformer, which is directly electrically connected to the voltage tap TP, has two secondary windings 7 and two measuring windings 18, 19 while the resonance reaction coil 11 connected in series with the intermediate ,. ~, . , .. . - .
,.i,, ,.. '.. ','' ~, ";: ~, .', . .. ' 2~ 766 transformer 6 has one measuring or control winding 20.
The electric connection between the capacitive voltage divider 2 and the intermediate transformed 6 is obtained via a plug contact pin 21, when required via a multicontact of conventional design. In Figure 1 an electric feed line 22 has !.i been additionally plotted. Said feed line 22 impresse~ the potential of customarily 20 kV on the intermediate transformer 6 at the divider point TP between the divider capacitors 3 and 4.
A further electric line 22 shown in Figure 1 connects the conductive coating 12 of the casting resin block 5 to the end of the divider capacitor 4 that lies on earth potential.
The casting resin sheathing 13 of the divider capacitors 3 and 4 preferably consists of elastic casting resin, particularly of polyurethane, which can absorb the thermal expansions of the quantitatively extremely small impregnating agent without requiring an additional conservator tank. However, as briefly mentioned hereinbefore, a conservator tank of mall volume can be provided, particularly as annular screening electrode at the junction between the divider capacitors 3 and 4.
A particularly distinguishing feature of the capacitive voltage transformer according to the present invention is that all the components, namely the capacitive voltage divider 2, the intermediate transformer 6 and the resonance reaction coil 11 can 2~ be produced and pretested separately and on having passed the preliminary test they can be mounted ~ointly in the simplest manner. The casting resin technology used for both the voltage divider 2 and the intermediate transformer 6 is on a very high technological level so that the breakdown quota is very low from 3U the outset and can even be reduced further by prefabricating these components. With the casting resin technology applied the sizes of the capacitive voltage divider 2 and of the intermediate transformer 6 can be reduced to optimal values. Furthermore because the resonance reaction coil 11 is series-connected and is .:
~ , :, , ' .
2~ ,.D7665 housed in the metal casing 9, the dimensions of the resonance reaction coil 11 can also be reduced to a minimum.
Thus not only is the capacitive voltage transformer according to the present invention distinguished by a high degree of operating reliability but it is also distinguished by an extremely compact construction.
:I.u 2~ :
~ :
Claims (6)
1. A capacitive voltage transformer, comprising a capacitive voltage divider, a resonance reaction coil and an intermediate transformer connected to the divider point of said voltage divider, at least the secondary winding of the intermediate transformer being sealed in casting resin in which the secondary winding of the intermediate transformer is connected first to the divider point of the capacitive voltage transformer, in series with at least one component of the secondary winding of the intermediate transformer, the secondary winding of the resonance reaction coil is then added as a higher stage, the intermediate transformer with all the winding and core components is sealed in an open air-resistant casting resin block and the casting resin block carries the voltage divider and is flanged thereto.
2. A capacitive voltage transformer as in claim 1, wherein below the casting resin block there is a free space which is defined by a metal casing for housing the resonance reaction coil.
3. A capacitive voltage transformer as in claim 2, wherein the surface of the casting resin block is provided with metallization which is connected to the metal casing on the earth potential so as to be electrically conducting.
4. A capacitive voltage transformer as in claim 1, 2 or 3, wherein the gas-or liquid-impregnated divider capacitors of the capacitive voltage divider are completely encompassed by a casting resin casing, said casting resin casing being applied in uphill casting while displacing the gaseous or liquid insulating agent in the casting mould.
5. A capacitive voltage transformer as in the claims 1, 2 or 3, wherein ribs are provided on the casting resin sheathing of the voltage divider, said ribs forming a single homogeneous body with the casting resin sheathing or being separately connected to the casting resin sheathing.
6. A capacitive voltage transformer as in the claims 1, 2 or 3 wherein the electric connection between the capacitive voltage divider and the secondary winding of the intermediate transformer is obtained via a plug contact pin.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8900352U DE8900352U1 (en) | 1989-01-13 | 1989-01-13 | Capacitive voltage converter |
| DEG8900352.7 | 1989-01-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2007665A1 true CA2007665A1 (en) | 1990-07-13 |
Family
ID=6835034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2007665 Abandoned CA2007665A1 (en) | 1989-01-13 | 1990-01-12 | Capacitive voltage transformer |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA2007665A1 (en) |
| CH (1) | CH679430A5 (en) |
| DE (1) | DE8900352U1 (en) |
| FR (1) | FR2641911A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9739807B2 (en) | 2015-08-05 | 2017-08-22 | Schneider Electric USA, Inc. | Voltage sensor with a capacitive voltage transformer |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1868605A (en) * | 1930-12-01 | 1932-07-26 | Condit Electrical Mfg Corp | Potential transformer |
| CH295124A (en) * | 1951-10-15 | 1953-12-15 | Oerlikon Maschf | Instrument transformer arrangement, consisting of a current and a voltage transformer. |
| CH343528A (en) * | 1955-04-19 | 1959-12-31 | Siemens Ag | Capacitive voltage converter |
| FR1229432A (en) * | 1958-07-16 | 1960-09-07 | Siemens Ag | Capacitive voltage transformer |
| DE1793384U (en) * | 1958-12-04 | 1959-08-13 | Siemens Ag | CAPACITIVE VOLTAGE CONVERTER WITH TIPPING VIBRATION SUPPRESSION. |
| DE1095390B (en) * | 1959-09-24 | 1960-12-22 | Raupach Friedrich | Transformer, especially transducer or choke coil, preferably for high-voltage systems |
| DE1144841B (en) * | 1961-05-05 | 1963-03-07 | Siemens Ag | Capacitive voltage converter with inductive intermediate converter and means for compensating for the voltage drop caused by the load current |
| DE1438625A1 (en) * | 1962-08-15 | 1969-01-23 | Siemens Ag | Measuring group assembled from a current transformer and a capacitive voltage transformer into one unit |
| DE1241908B (en) * | 1963-06-27 | 1967-06-08 | Licentia Gmbh | Capacitive voltage divider made in cast resin technology for measuring purposes |
| CH414008A (en) * | 1964-12-04 | 1966-05-31 | Sprecher & Schuh Ag | Additional device for capacitive voltage divider |
| DE7030750U (en) * | 1970-08-17 | 1971-01-21 | Wandler & Transformatorenwerk | CAPACITIVE VOLTAGE INDICATOR. |
| DE2209734A1 (en) * | 1972-02-25 | 1973-08-30 | Siemens Ag | VOLTAGE CONVERTER |
| DE2325443B2 (en) * | 1973-05-17 | 1979-02-08 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Voltage converter for a multi-conductor high-voltage switchgear |
| DE2363933C3 (en) * | 1973-12-20 | 1980-09-04 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Combined current and voltage measuring device |
| US4002976A (en) * | 1975-04-01 | 1977-01-11 | S & C Electric Company | Voltage sensing device for use at high voltage |
| FR2447637A1 (en) * | 1979-01-23 | 1980-08-22 | Enertec | IMPROVEMENT TO CAPACITIVE VOLTAGE TRANSFORMERS |
| JPS56100406A (en) * | 1980-01-17 | 1981-08-12 | Toshiba Corp | Transformer for measuring instrument |
| JPS56115513A (en) * | 1980-02-16 | 1981-09-10 | Nissin Electric Co Ltd | Capacitor type potential transformer |
| DE3048285A1 (en) * | 1980-12-20 | 1982-07-29 | Friedrich Dr.-Ing. e.h. 8600 Bamberg Raupach | MOLDED-INSULATED MEASURING CONVERTER, ESPECIALLY CURRENT AND VOLTAGE CONVERTER |
-
1989
- 1989-01-13 DE DE8900352U patent/DE8900352U1/en not_active Expired
- 1989-12-18 FR FR8916703A patent/FR2641911A1/en not_active Withdrawn
-
1990
- 1990-01-03 CH CH590A patent/CH679430A5/en not_active IP Right Cessation
- 1990-01-12 CA CA 2007665 patent/CA2007665A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9739807B2 (en) | 2015-08-05 | 2017-08-22 | Schneider Electric USA, Inc. | Voltage sensor with a capacitive voltage transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| DE8900352U1 (en) | 1989-08-03 |
| CH679430A5 (en) | 1992-02-14 |
| FR2641911A1 (en) | 1990-07-20 |
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