CA1114465A - Tapped air core reactor - Google Patents
Tapped air core reactorInfo
- Publication number
- CA1114465A CA1114465A CA325,653A CA325653A CA1114465A CA 1114465 A CA1114465 A CA 1114465A CA 325653 A CA325653 A CA 325653A CA 1114465 A CA1114465 A CA 1114465A
- Authority
- CA
- Canada
- Prior art keywords
- coil
- spider
- units
- outermost
- cylindrical
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
Abstract
ABSTRACT
An air core reactor having open ended, rigid, cylindrical coils disposed in concentric spaced apart relation and a rigid spider unit at each of opposite ends thereof. The spider units are interconnected by insulators tensioned to provide a robust reactor unit. The outermost cylindrical coil has the winding thereof extending axially along a portion of the length of the other coils with the remainder of such axial length being filled by an insulating cylindrical spacer. The outermost coil winding has tap terminals at various different positions peripherally around the coil for connecting selected portions of such winding in series with the windings of the main coil. The main coil windings are connected to the spider electrically and one spider serves as a terminal for con-necting to the line and the other line terminal constitutes a tap terminal on the outermost coil.
An air core reactor having open ended, rigid, cylindrical coils disposed in concentric spaced apart relation and a rigid spider unit at each of opposite ends thereof. The spider units are interconnected by insulators tensioned to provide a robust reactor unit. The outermost cylindrical coil has the winding thereof extending axially along a portion of the length of the other coils with the remainder of such axial length being filled by an insulating cylindrical spacer. The outermost coil winding has tap terminals at various different positions peripherally around the coil for connecting selected portions of such winding in series with the windings of the main coil. The main coil windings are connected to the spider electrically and one spider serves as a terminal for con-necting to the line and the other line terminal constitutes a tap terminal on the outermost coil.
Description
iS
This :Lnventlon relates general~y to air core reactors ~or use inindustrialor utility power systems and more particularly, to improvements ln a tapped air core reactor.
The present applicant has over the years developed and ~rketed in many countries throughout the world, air core reactors consisting essentially of rigid cylindrical coil onits disposed in spaced apart concentric relation and having a spider unit at each of opposite ends thereof serving as line terminals for connecting to the power lines and means to connect the coils in parallel. Applicant's earlier develop-ment of such type reactor is disclosed in Canadian Patent 756~250 issued April 4th, 1967. Further developments are disclosed in applicant~s Canadian Patent 965,166 issued March 25th, 1975 and ln pending Canadian application 27~,630 ~iled 2Iarch 23rd, 1977. In the latter application there is disclosed a tapped air core reactor constructed in such a manner as to permit the reactors to be stacked one on top of the other when used in a three-phase system. The tapping coil is a pancake type coil mounted on one of the end spiders. The draw-back, however, with such arrangement is that when the reactors are stacked one on top of the other the tapping terrninals are located between the reactor units.
A principal object of the present invention is to provide a structurally rigid, tapped reactor with the tapping terminals located such as to Eacilitate making connections thereto.
Another principal object of the present invention is to ~; ; provide a tapped changing method designed to maintain the input and output terminals at a Eixed location such that permanent three-phase bus work nstallation is feas1b1e.
- A further priDcipal object of the present invention is to ` provide~a tapped alr core reactor wherein changing from one tap to another . .
., , : ~
. , , - ~ : . . . .
S
may be eEfected with~-lL di~co~necti~g the ~Ain ter~inals utllized ln connecting the reactor to the power system.
In keeping wlth the foregoing, there is provide~ in accord-ance with the present invention a tapped air coil reactcr comprising two or more open ended cylindrical rigid coil units disposed in concentric spaced apart relation, a structurally rigid, electrical conducting, spider unit at each of opposite ends of said coils, electrical insulating means interconnecting said spider units to provide a structurally rigid reactor unit, all of said coil units, except the radial outermost one thereof, 10 having coil windings connected at each of opposite ends to the respective spiders, said radial outermost coil having a winding extending axially along only a portion of the length of the other coils and the remaining length being constituted by a cylindrical insulating sleeve, said radial outermost coil having a plurality of tap terminals secured to the coil winding thereof and located at various different peripheral positions and adjust-able means for connecting any one of the tap terminals to one of said spider units.
The invention is illustrated by way of example with reference to the accompanying drawings wherein:
Figure 1 is an elevational view of three identical single phase reactors provided in accordance with the present invention stacked vertically in coaxial juxtaposed relation;
Flgure 2 is essentially a top plan view of Figure l;
Figure 3 is a cross-sectional view taken along section 3-3 of Figure 2;
Figure 4 is similar to Figure 3 but illustrating minor modifications thereto;
Figure S is a partial, enlarged sectional, view of a portion of the tapping coil :Lllustrating one of the tap terminals;
-:
: . . . , . ~ . .: . - .. . , .. i, . , .. .. ~ ... i , . .. . . . .
::, : . - . . :.. ,. , ,, . .. . . ,;. ;. .. .. . ~ . ,:
.'.,''.''" ..:' '':''' ' :" '':,,'' ''''"",:, ;.'"' ,'' :'''' '' ' .'' ' ' "".. ~" : ''' :
.: -::, . . .: . : ., . :-: . .. : : , . , ~ : . . :
Figure 6 is a leEt-hand s~de eLevational view of ~igure 5; and Figure 7 is a sche~atic circuit dia~rarl for the alr core reactor provided in accordance with the present invention;
Referring to the drawings, there is lllustrated in Flgure 1 three tapped reactDrs 10 stacked vertica:Lly one on top of the other in coaxial relation for connecting to a three-phase electrical system by terminals A and B of the respective unit~;. Terminal A the input, and terminal B the output, are in fixed locations on the respective units permitting permanent three-phase bus work installations.
Each reactor un:it designated generally by the reference numeral 10 consists of a plurality of open endedcylindrical coil units l:L, 12, 13 and 14 disposed in spaced a~art concentric relation and located between a pair of end spiders 15 and l6. Eac'n of the end spiders is a rigid electrically conducting unit consisting of a central hub 17 having a plurality of arms 1~ radiating outwardly therefrom. The end spiders 15 and 16 are interconnected by a plurality of tie members 19 tensioned to hold the spider units tight against opposed ends of the cylindrical coils. The tie members 19 are made of an insulating material or at least are insulated from the spiders in such a manner as to prevent short circuiting from one spider to the other 'oy way of the tie means.
Each reactor unit has a plurality of pedastal and insulator units 20 attached to the lowermost spider thereof for mounting one reactor unit on top of the other and supporting the lowermost reactor unit on a suitable foundation.
The inner cyllndrical coilunits 11, 12 and 13 constitute a main coil section 25 (see Figure 7) of each reactor unit and the outermost coil 14 constitutes a tapping coil section. Each coil unit ll, 12 and 13 of the main coil section consists of one or more conductors :
: : :
. , .. :, . . : .. -9L6~
26 helically wound aroun~ the axis of the cylinder and embedded in a resinous materi.al 27 rein~o~ce~, pre;ferably, witl~ fllament glass to provide a rigid assembly wllen cured. Each coil ~Init 11, 12 and 13 is thus an independent, rigid cy]indrical unit. TIIe conductor 26 of the respective coils 11, 12 and 13 is connected at one end to spider 16 and at the other end to spider 15 electrically connecting the coils in parallel. As disclosed in applicant's previous applications, the spider arms permit connecting the coils in fractional turns to balance the coils preventing circulating currents and avoiding the necessity of transposed windin~s as required in earlier current limiting reactors.
The outermost cylindrical coil 14 constitutes a tapping coil section having a plurality of tap terminals 30 to 3~ located at different positions circumEerentially around the coil. The tap terminals 30 to 36 are also located at various spacings from the bottom spider 15; tap terminal 30 being closest thereto and tap terminal 36 being furthest thereErom. Any number of tap terminals may be provided dependent upon the customer needs.
Each tap terminal is a heavy metal plate welded or otherwise permanently attached to the conductor of coil 14 and has apertures 37 for receiving bolt and nut UIIitS 38. Any one of the tap terminals may be con-nected to the bottom spider 15 by a tap changer bar unit designated generally by the reference numeral 40. The tap changer bar unit consists of a first angle member 41, apertured to receive bolt and nut units 38 to connect the same to a tap terminal, and a second bar member 42. Bar members 41 and 42 are interconnected by bolt and nut units 43 slidable in slots 44 in the bar 42. The length of the slots 44 is such as to permit connecting to any one of the tap terminals wbich are variously spaced from the spider 15.
The other end of bar member 42 is connected to a plate 45 on the outer end of an arm of the bottom spider 15. ~or this purpose the arms of the botto~
spider extend radially beyond the outermost coil unit 14 and each has an . ~.
:
, . ,., . - : .. . . . ,: ~ . - , , .:: ,, . , . . ~ . : :.. ' ' ' ' '. ' ' : . `: ., '.' " ' . . .' ,,, ' :~, :
: ' ' , .'. , ' ' ' . . ` . . .; . ' .: ' .:: , ' ' ' . . ' 65i aperturecl p:Late 45 secu~ed ~ reto. The bar 42 ls connected to the bracket members 45 by bo:Lt and IlUt unit~ 46, From ~he foregoing arrange~e~t, ~t wil~ be readily apparent the tap changer 40 may be readily adjusted so as to be connectible to any one of the tap terminals~ even though located at differen~ spacings from the bottom spider.
The outermost coil 14, i.e. the tapped coil section of the reactor, is an open-ended cylindrical unit having a conductor 50 wound to extend axially along only a portion of the length of the reactor, this axial length being designated ~ in Figure 3, and the remainder of the length (designated ~ in Figure 3) is a cylindrical spacer of insulating material having the same diameter as the wound coil. The conductor 50 may be a solid rod or cable conductor wound into an open helix or multiple conductors wound simultaneously. The outermost coil 1~ is preferably made by winding the conductor 50 onto a winding mandrel and filling the spaces between adjacent helices with a glass fibre reinforced settable plastics material.
Before the resinous material completely fills the space between adjacent helices the terminal bars are welded to the conductor and thereafter the filament glass and resin is wound continuously on the mandrel filling the remaining space between the adjacent helices and builds up radially outwardly therebeyond to form a rigid cylinder unit. In Figure 5 the cylindrical coil 14 has inner and outer peripheral surfaces designated 51 and 52 with the conductor 50 substantially encapsulated therein, except for perhaps a minor portion of the conductor which is in contact with the winding mandrel during forming of the cylinder~
The conductor 50 normally is not connected to the bottom spider and thus tapping effectively shorts out unwanted turns of the tapping coil section to the bottom spider. The . : , . . ~ . . ...
~, . ., : ., , ~ .: . - :- . . - , - . , :
:.. ---: .: :: . - ... : . . - . : . . . ..
. :.,, . .:' , -, . , ,... , :., , - . , , ~ : .
.: : : ' ,.;: : . .:: . . , .. .'~: : :
-. :- , . :. .: . . : , .
.- . . : . . , . . : . ..
,. . ~
~ :, : , . .
utilized number of tu~ns fPr tlle tapped sectlon is counted from the top of the winding downwarcl as vlewed in, ~r e~a~ple, Figure 3, and tlle highest tap terminal on tile tapped coLl sectLon serves as the output terminal designated B on the drawings. If desirecl for single or three-phase mounting, the tap winding can be connected to the bottom spider. In such case no tap changer will be used and tapping is done by bus connection made directly to a specific tap and the number of utili~ecl turns will be counted from the bottom of the section upwardly.
From the foregoing it will be seen the cylindrical coils are concentrically disposed and spaced apart from one another and tlle spiders at opposite ends interconnected by ties provide a rigid, robust unit.
Figure 4 illustrates minor alternatives which include arms on the upper and lower spiders stepped Erom the remaining portion of the spider arms so that effectively the outermost coil 14, i.e. the tapping coil section, has an axial length greater than the axial length of the main coils. Stepping of the spider arms may be done in any one of a number of different ways, the simplest being joining additional sections(designated 65) tothe respective spider arms. The additional section on the spider arm may be used on each of the top or bottom spiders or, alternatively, either one or the other. The purpose of the stepped arm spider is to create extra arcing distance between the input terminal and the highest tap terminal for high voltage coils. In Figure 4 there is also illustrated a dummy package designated 70 which is an insulated cylindrical sleeve of required thickness to act as a voltage barrier to prevent arcing between the corner of the main coil part of the spiders to the tap section winding.
~ .
:
~ 6 --. .
,: , , , : ' ' . : ~ : ' ,. .; :
: ~ . . . . . . ~::
~ : ~ . ' . '
This :Lnventlon relates general~y to air core reactors ~or use inindustrialor utility power systems and more particularly, to improvements ln a tapped air core reactor.
The present applicant has over the years developed and ~rketed in many countries throughout the world, air core reactors consisting essentially of rigid cylindrical coil onits disposed in spaced apart concentric relation and having a spider unit at each of opposite ends thereof serving as line terminals for connecting to the power lines and means to connect the coils in parallel. Applicant's earlier develop-ment of such type reactor is disclosed in Canadian Patent 756~250 issued April 4th, 1967. Further developments are disclosed in applicant~s Canadian Patent 965,166 issued March 25th, 1975 and ln pending Canadian application 27~,630 ~iled 2Iarch 23rd, 1977. In the latter application there is disclosed a tapped air core reactor constructed in such a manner as to permit the reactors to be stacked one on top of the other when used in a three-phase system. The tapping coil is a pancake type coil mounted on one of the end spiders. The draw-back, however, with such arrangement is that when the reactors are stacked one on top of the other the tapping terrninals are located between the reactor units.
A principal object of the present invention is to provide a structurally rigid, tapped reactor with the tapping terminals located such as to Eacilitate making connections thereto.
Another principal object of the present invention is to ~; ; provide a tapped changing method designed to maintain the input and output terminals at a Eixed location such that permanent three-phase bus work nstallation is feas1b1e.
- A further priDcipal object of the present invention is to ` provide~a tapped alr core reactor wherein changing from one tap to another . .
., , : ~
. , , - ~ : . . . .
S
may be eEfected with~-lL di~co~necti~g the ~Ain ter~inals utllized ln connecting the reactor to the power system.
In keeping wlth the foregoing, there is provide~ in accord-ance with the present invention a tapped air coil reactcr comprising two or more open ended cylindrical rigid coil units disposed in concentric spaced apart relation, a structurally rigid, electrical conducting, spider unit at each of opposite ends of said coils, electrical insulating means interconnecting said spider units to provide a structurally rigid reactor unit, all of said coil units, except the radial outermost one thereof, 10 having coil windings connected at each of opposite ends to the respective spiders, said radial outermost coil having a winding extending axially along only a portion of the length of the other coils and the remaining length being constituted by a cylindrical insulating sleeve, said radial outermost coil having a plurality of tap terminals secured to the coil winding thereof and located at various different peripheral positions and adjust-able means for connecting any one of the tap terminals to one of said spider units.
The invention is illustrated by way of example with reference to the accompanying drawings wherein:
Figure 1 is an elevational view of three identical single phase reactors provided in accordance with the present invention stacked vertically in coaxial juxtaposed relation;
Flgure 2 is essentially a top plan view of Figure l;
Figure 3 is a cross-sectional view taken along section 3-3 of Figure 2;
Figure 4 is similar to Figure 3 but illustrating minor modifications thereto;
Figure S is a partial, enlarged sectional, view of a portion of the tapping coil :Lllustrating one of the tap terminals;
-:
: . . . , . ~ . .: . - .. . , .. i, . , .. .. ~ ... i , . .. . . . .
::, : . - . . :.. ,. , ,, . .. . . ,;. ;. .. .. . ~ . ,:
.'.,''.''" ..:' '':''' ' :" '':,,'' ''''"",:, ;.'"' ,'' :'''' '' ' .'' ' ' "".. ~" : ''' :
.: -::, . . .: . : ., . :-: . .. : : , . , ~ : . . :
Figure 6 is a leEt-hand s~de eLevational view of ~igure 5; and Figure 7 is a sche~atic circuit dia~rarl for the alr core reactor provided in accordance with the present invention;
Referring to the drawings, there is lllustrated in Flgure 1 three tapped reactDrs 10 stacked vertica:Lly one on top of the other in coaxial relation for connecting to a three-phase electrical system by terminals A and B of the respective unit~;. Terminal A the input, and terminal B the output, are in fixed locations on the respective units permitting permanent three-phase bus work installations.
Each reactor un:it designated generally by the reference numeral 10 consists of a plurality of open endedcylindrical coil units l:L, 12, 13 and 14 disposed in spaced a~art concentric relation and located between a pair of end spiders 15 and l6. Eac'n of the end spiders is a rigid electrically conducting unit consisting of a central hub 17 having a plurality of arms 1~ radiating outwardly therefrom. The end spiders 15 and 16 are interconnected by a plurality of tie members 19 tensioned to hold the spider units tight against opposed ends of the cylindrical coils. The tie members 19 are made of an insulating material or at least are insulated from the spiders in such a manner as to prevent short circuiting from one spider to the other 'oy way of the tie means.
Each reactor unit has a plurality of pedastal and insulator units 20 attached to the lowermost spider thereof for mounting one reactor unit on top of the other and supporting the lowermost reactor unit on a suitable foundation.
The inner cyllndrical coilunits 11, 12 and 13 constitute a main coil section 25 (see Figure 7) of each reactor unit and the outermost coil 14 constitutes a tapping coil section. Each coil unit ll, 12 and 13 of the main coil section consists of one or more conductors :
: : :
. , .. :, . . : .. -9L6~
26 helically wound aroun~ the axis of the cylinder and embedded in a resinous materi.al 27 rein~o~ce~, pre;ferably, witl~ fllament glass to provide a rigid assembly wllen cured. Each coil ~Init 11, 12 and 13 is thus an independent, rigid cy]indrical unit. TIIe conductor 26 of the respective coils 11, 12 and 13 is connected at one end to spider 16 and at the other end to spider 15 electrically connecting the coils in parallel. As disclosed in applicant's previous applications, the spider arms permit connecting the coils in fractional turns to balance the coils preventing circulating currents and avoiding the necessity of transposed windin~s as required in earlier current limiting reactors.
The outermost cylindrical coil 14 constitutes a tapping coil section having a plurality of tap terminals 30 to 3~ located at different positions circumEerentially around the coil. The tap terminals 30 to 36 are also located at various spacings from the bottom spider 15; tap terminal 30 being closest thereto and tap terminal 36 being furthest thereErom. Any number of tap terminals may be provided dependent upon the customer needs.
Each tap terminal is a heavy metal plate welded or otherwise permanently attached to the conductor of coil 14 and has apertures 37 for receiving bolt and nut UIIitS 38. Any one of the tap terminals may be con-nected to the bottom spider 15 by a tap changer bar unit designated generally by the reference numeral 40. The tap changer bar unit consists of a first angle member 41, apertured to receive bolt and nut units 38 to connect the same to a tap terminal, and a second bar member 42. Bar members 41 and 42 are interconnected by bolt and nut units 43 slidable in slots 44 in the bar 42. The length of the slots 44 is such as to permit connecting to any one of the tap terminals wbich are variously spaced from the spider 15.
The other end of bar member 42 is connected to a plate 45 on the outer end of an arm of the bottom spider 15. ~or this purpose the arms of the botto~
spider extend radially beyond the outermost coil unit 14 and each has an . ~.
:
, . ,., . - : .. . . . ,: ~ . - , , .:: ,, . , . . ~ . : :.. ' ' ' ' '. ' ' : . `: ., '.' " ' . . .' ,,, ' :~, :
: ' ' , .'. , ' ' ' . . ` . . .; . ' .: ' .:: , ' ' ' . . ' 65i aperturecl p:Late 45 secu~ed ~ reto. The bar 42 ls connected to the bracket members 45 by bo:Lt and IlUt unit~ 46, From ~he foregoing arrange~e~t, ~t wil~ be readily apparent the tap changer 40 may be readily adjusted so as to be connectible to any one of the tap terminals~ even though located at differen~ spacings from the bottom spider.
The outermost coil 14, i.e. the tapped coil section of the reactor, is an open-ended cylindrical unit having a conductor 50 wound to extend axially along only a portion of the length of the reactor, this axial length being designated ~ in Figure 3, and the remainder of the length (designated ~ in Figure 3) is a cylindrical spacer of insulating material having the same diameter as the wound coil. The conductor 50 may be a solid rod or cable conductor wound into an open helix or multiple conductors wound simultaneously. The outermost coil 1~ is preferably made by winding the conductor 50 onto a winding mandrel and filling the spaces between adjacent helices with a glass fibre reinforced settable plastics material.
Before the resinous material completely fills the space between adjacent helices the terminal bars are welded to the conductor and thereafter the filament glass and resin is wound continuously on the mandrel filling the remaining space between the adjacent helices and builds up radially outwardly therebeyond to form a rigid cylinder unit. In Figure 5 the cylindrical coil 14 has inner and outer peripheral surfaces designated 51 and 52 with the conductor 50 substantially encapsulated therein, except for perhaps a minor portion of the conductor which is in contact with the winding mandrel during forming of the cylinder~
The conductor 50 normally is not connected to the bottom spider and thus tapping effectively shorts out unwanted turns of the tapping coil section to the bottom spider. The . : , . . ~ . . ...
~, . ., : ., , ~ .: . - :- . . - , - . , :
:.. ---: .: :: . - ... : . . - . : . . . ..
. :.,, . .:' , -, . , ,... , :., , - . , , ~ : .
.: : : ' ,.;: : . .:: . . , .. .'~: : :
-. :- , . :. .: . . : , .
.- . . : . . , . . : . ..
,. . ~
~ :, : , . .
utilized number of tu~ns fPr tlle tapped sectlon is counted from the top of the winding downwarcl as vlewed in, ~r e~a~ple, Figure 3, and tlle highest tap terminal on tile tapped coLl sectLon serves as the output terminal designated B on the drawings. If desirecl for single or three-phase mounting, the tap winding can be connected to the bottom spider. In such case no tap changer will be used and tapping is done by bus connection made directly to a specific tap and the number of utili~ecl turns will be counted from the bottom of the section upwardly.
From the foregoing it will be seen the cylindrical coils are concentrically disposed and spaced apart from one another and tlle spiders at opposite ends interconnected by ties provide a rigid, robust unit.
Figure 4 illustrates minor alternatives which include arms on the upper and lower spiders stepped Erom the remaining portion of the spider arms so that effectively the outermost coil 14, i.e. the tapping coil section, has an axial length greater than the axial length of the main coils. Stepping of the spider arms may be done in any one of a number of different ways, the simplest being joining additional sections(designated 65) tothe respective spider arms. The additional section on the spider arm may be used on each of the top or bottom spiders or, alternatively, either one or the other. The purpose of the stepped arm spider is to create extra arcing distance between the input terminal and the highest tap terminal for high voltage coils. In Figure 4 there is also illustrated a dummy package designated 70 which is an insulated cylindrical sleeve of required thickness to act as a voltage barrier to prevent arcing between the corner of the main coil part of the spiders to the tap section winding.
~ .
:
~ 6 --. .
,: , , , : ' ' . : ~ : ' ,. .; :
: ~ . . . . . . ~::
~ : ~ . ' . '
Claims (4)
1. A tapped air core reactor comprising two or more open ended cylindrical rigid coil units disposed in concentric spaced apart relation, a structurally rigid, electrical conducting, spider unit at each of opposite ends of said coils, electrical insulating means inter-connecting said spider units providing a structurally rigid reactor unit, all of said coil units, except the radial outermost one, having coil windings connected at each of opposite ends to the respective spiders, said radial outermost coil having a winding extending axially along only a portion of the length of the other coils and the remaining length being constituted by a cylindrical, insulating, sleeve, said radial outermost coil having a plurality of tap terminals secured to the coil positions and adjustable connector means connecting any one of the plurality of tap terminals to one of said spider units.
2. A tapped air core reactor as defined in claim 1 wherein each of said spider units comprises a central hub having arms radiating out-wardly therefrom and the arms of at least one of said spiders being stepped outwardly relative to the axial length of the coils, whereby the outermost cylindrical coil units.
3. A tapped air core reactor as defined in claims 1 or 2 including cylindrical insulating sleeve concentric with the coil units and disposed between the outermost coil and the next coil unit adjacent thereto.
4. A tapped air core reactor as defined in claims 1 or 2 wherein said adjustable connector means comprises a variable length bracket detachably securable at one end to an outer end portion of an arm of one spider and at the other end to a tap terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA325,653A CA1114465A (en) | 1979-04-18 | 1979-04-18 | Tapped air core reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA325,653A CA1114465A (en) | 1979-04-18 | 1979-04-18 | Tapped air core reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1114465A true CA1114465A (en) | 1981-12-15 |
Family
ID=4113989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA325,653A Expired CA1114465A (en) | 1979-04-18 | 1979-04-18 | Tapped air core reactor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1114465A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009126977A1 (en) * | 2008-04-18 | 2009-10-22 | Trench Austria Gmbh | Electrostatic screen for an hvdct component |
| RU2514856C2 (en) * | 2006-10-26 | 2014-05-10 | Сименс Акциенгезелльшафт | Reactive ballast arrangement |
| WO2014138762A1 (en) * | 2013-03-15 | 2014-09-18 | Trench Austria Gmbh | Winding layer pitch compensation for an air-core reactor |
| US9601254B2 (en) | 2012-07-24 | 2017-03-21 | Siemens Aktiengesellschaft | Apparatus and method for mitigating thermal excursions in air core reactors due to wind effects |
-
1979
- 1979-04-18 CA CA325,653A patent/CA1114465A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2514856C2 (en) * | 2006-10-26 | 2014-05-10 | Сименс Акциенгезелльшафт | Reactive ballast arrangement |
| WO2009126977A1 (en) * | 2008-04-18 | 2009-10-22 | Trench Austria Gmbh | Electrostatic screen for an hvdct component |
| US8520357B2 (en) | 2008-04-18 | 2013-08-27 | Trench Austria Gmbh | Electrostatic shield for an HVDC transmission component |
| US9601254B2 (en) | 2012-07-24 | 2017-03-21 | Siemens Aktiengesellschaft | Apparatus and method for mitigating thermal excursions in air core reactors due to wind effects |
| WO2014138762A1 (en) * | 2013-03-15 | 2014-09-18 | Trench Austria Gmbh | Winding layer pitch compensation for an air-core reactor |
| US10777348B2 (en) | 2013-03-15 | 2020-09-15 | Siemens Aktiengesellschaft | Winding layer pitch compensation for an air-core reactor |
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Legal Events
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| MKEX | Expiry |