CA2258530A1 - Device for transmitting light between two points with a different electric potential and process for manufacturing such a device - Google Patents
Device for transmitting light between two points with a different electric potential and process for manufacturing such a device Download PDFInfo
- Publication number
- CA2258530A1 CA2258530A1 CA002258530A CA2258530A CA2258530A1 CA 2258530 A1 CA2258530 A1 CA 2258530A1 CA 002258530 A CA002258530 A CA 002258530A CA 2258530 A CA2258530 A CA 2258530A CA 2258530 A1 CA2258530 A1 CA 2258530A1
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- Canada
- Prior art keywords
- internal space
- insulator
- optical waveguide
- plastic foam
- electric potential
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4416—Heterogeneous cables
- G02B6/4417—High voltage aspects, e.g. in cladding
- G02B6/442—Insulators
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Insulating Bodies (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
- Processing Of Terminals (AREA)
- Insulators (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
Device for transmitting light between two points with a different electric potential and process for manufacturing such a device. The device contains a high-voltage insulator (2) with an inner cavity (3) which receives optical fibres (4, 5) and is filled with a plastic foam (6), preferably polyurethane foam.
Description
1~;15~1~98 15:45 9251101 LERNER GREEN3ERG PAGE 04 9 6 P 3 4 4 3 ~ ~- r ~ r ~
,",, , ~
l~e~c~ipt~o:~
l~r~ent ~o~ tr~m~ttin~ 1~ ght }~etwee~ two loeatio~c at dlffer~t ~l-ctric p~t~ntial, ~r~d "~ethod o~ producing ~uch a~ ~ ~ ~y t l~ne ~ n~ t~ o~ re~ate~ to A~ a~ra~sl~t ~or tra~mittl~g llgh'c betw~e~ two locatlono at diff~rent el-ct~ic pote~eial. T~ in~.r~tio~ ~urth~r r~lat~ to ~.
~tbod of produci~g ~ arra~y.. . t ~c~ t;ca~ttl~g li~t betw~ two locat~ on~ at d~ f ferent eloctric pot~ntial .
I3 ord~r to ~ e p~y~ical va~iabl~c, ~uch a8 ~1 ~ctric curr~:Lt or ~l~ctric volt--ger for ~?lo~ at h~gh volt~ye pote~ti~l, t~o m a-ured ~ t ~-t~ ~tt~d f~om sen-ors ~rovided lrl order to m~ th-v~ri ~ ~ i~ a m~r wl~lch 1- at a ~otQ~ltt al ~ rated 15 from ~~rt~ .pot-nt~al . I?c~t~tlal-~re~ tr~l~ on o~ the m~7~ ig~al~ osslbl~, ~J ~ hlow~, ~n th~ ~o~m of o~t~cal ~lg~al~ v~a o~tical wav~gulde~, wh~ch are l~d from the h$~ volt~ge poten~i~l to earth potont$al.
8y~te~ are ~ o l~o~m in which, $s~ addlt$on tc~ tho 0 sllea~urad ~ , th~ r f or the ~cn~orJ wh~ch are l~cate~ on the high ~roltas~e lde i~ ~lco tr~lt~-d ~pt~c~lly ~i~ o~tlcal wa~esJulde~.
~ optical ~ id~ h~v~ to b~ prot~at-d ag~ n~t ~ c~-n~ c~l ~trea~e~ . I~rt~ ol. ~or the 25 ~lcctr~cal in~ulation, ~ ~uff~al~tly ~h electrical b~ --k~ P ~d g-n~rally aleo ~ ~uf f ~ cie~tly h~gh ~l~ctrlcAl cr~-p p~th betw~en t~e high ~oltag- ~f.de ~d t~e ~a~th ~ot~ntla~ ~id- ~u~t be e~ured.
E~?-B-0 26S 737 ~aa dlsaloc~d an a~a~g~e~t for 30 tr~n~lttlr~g t~o m~aourod ~ of a ~ur~t tra~c-for~r ~t ~igh voltase potent~l to earth pot-nt~l {P.
th~ ~onll of ol?t~c~ B. ~1~ kno~ nt co~pri~ tubular h~ ~h ~oltaç~e i ~ul~to~
vert$eal ly f rom the aurrent tr~ f or~or to the b~e, 3 5 w~ic~ i~ lyi~g at e-rth potene$al, the ~ ~ul-tor ~elng d- of c-~asp,lc o~ s~ fi~re-rc~forc~d pla~t~¢ (G~P~, ~d o~ or ~ore optieal co~du~:tor~ ~n ~n opt~cal 1~15/199~ 15: 45 ~51101 LERNE~ ~REENE~ERG PAI~iE 05 cond~ctor cable, wh~ch 1~ l~d ~n ~ h~llx throu~h ~n ine-~n-l ~pace of the hig~ ~ltage in~ul~tor. ~he optical me~ur-d ~lg~ a~ tr-nJm~tte~ th~ opt~cal ~o~-ductor-. The int~rnal ~pace of t~- h~g~ volta5~ inaulator e~n be fille~ with ~ir o~ ~ith an i~ul~t~y ga~, Juch ~
nitrogen (N,) or ~ul~ur ~exafluor~d~ ~5F~). T~ A~ot~er ~ ;ment of t~ kcown ~~a~ t, the optlcal co~tor cable i~ wou~d Qxt~r3ally ln ~ h~l~x onto ~h~
i~-~l~tor tube ant ~ t' in ~ ca~t-on ~ilicon l~yer or }O e~e~ co8pl~t~ly cov~rod ~y the ~ con layer. I~
additlo~, ~ilicon ~h~d~ to l~ngt~en t~ ~ur~a~e cree~
pa~h ~re ~ormed wl~ icon lay~r~ I~ the ca~a o~
the arr~5~ -nt di~elo~-d by 15P-B-0 265 737, ~n th me~t wit~ ~n~ ,ti~g SJ~ th~ in~ul4tl~g g~ t 15 b~ reflllod in the c~s~ of l-~cs, for ~xa~pl~ du~:ing mount~g op~ratlon~. I3 th- c-~- of t~ ~mboddln~ of th~
opt~cal cond~tor cabl~ llcon, probl~- m~y a~iee ~t the int-rf~ce bet~e~n t~e ~il$con aAd t~- optlcal co~-tuctor cable, a~ a re-ult o~ ther~l ~olu~ ch~ng-c of the ~ilico~ durlng temperature c~a~ge~. ~he~e ~olu~
~ can lead to lo~g$e~ n-~ g~ ~ n ~- clllcon along the o~tic~l c~n~uctoz c~bl~, ~nto whic~ ~ap~
~ol~ture c~n p~etrat~ Thi- ca~ r-~ult $n cr-opln~
~ r~e-.
The i~ O~:L $~, th~, b~-J~d on tA~ ct o~
~-cl~!y~ a~ ax~gement for trA~tt~g l~ht b-t~o~
two locatlo~ at di~ferent elsct~c ~?o~tl--l, ~d ~ethod of producln5r an a.~ t ~or trsncm~ttin~
betwe--n two locatlon~ at di~r~lt ~l~ctrlc: ~otential, wlth wh~ ch the clted proble~s 1~ thc pr~ or B~t a~e avolded .
Accord;L~g to th~ .r~tlo~, thi~ ¢t i~
A~:h~ red w~ th the ~t lr~ of Cl~lm 1 ~d of Cl~Lim 5 r~spectlvely.
3 5 Th~ arr~g~ner~t accordln9 to Claim 1 for tr~-~ttin~ }lght between two loc~t~on- ~t dl~er~t electr~ c ~otentlal co~p~a-e~
a) a~ innul~tor, w2~ich ic ~rr~n~ed betwee3 t~a ~wo loc~tion~ ~t ~ erent pote3t~al arld ~ nte~al . .
12~15il998 15: 45 9251101 LERNE~ GREEI~BERG PA~E 0 ~6 P 3443 - 3 -~p~ce which 1~ clo~ed ~ t~tially pr~J~ur~-t ig~t ~a~r, ~d b) at le-~t on- cptical w~regu~ do~ let thrDug~ the int~r~al cpac- o~ th- a~ulato~, for trau~ttiug the 1 lght, c~ th- int~ c- of ~he ~ Julator bcing rill-d wlth pla~tlc foam, wh~ch ~u ..\~d~ the At l~t o~e q?tic~l waveg~i~e.
I~ the c~e o~ th- ~thod accordl~ to Clai~ 5 for produc~ng ~n ~rr~ t ~or tr~n~mitting 1~ ~h~c b~L-_ tw4 loc--tion~ ~t dif~t el~t~ic pot~Ltl~l, n~Ulator wlt}~ a~ lnters~al Jpace ~d at le~Jt o~-opti~41 ~. v~ de for t~dttl~g t~ l.lght ar-~rovlded, lS b~ tho at l~ t on~ o~tlcAl wa~v~ulde ~ J lalt throug the i~t~ c~ac~ of ths lnculator a~d c) th~ i~'cer~l ~p~ce o~ the :Ln~ul~or, art-r the t ay~g of tS~ ~t l~a-t o~- optlc~
d w~ th pla~tlc ~o~ ~nd sul~e~ ly ~oalod 1 ~ yroo~ur--tig~t ma~-~.
A~ a re~ult of ~he ~ n~ of t~e ~ nt~ c~ac~
of t~ ul ato~ wlth pl~ctlc fo~ ood el~ctrlcal ~n~ tlon of the two pot~t~al el~de~ f~o~ a~ç~ othes 1 ac~l-vod, ~ $~ ~oo~ h~r~ica~ ~roteGt~oD. of t~e ~t 25 l-a~t o~LC optic~ ~vos~do 1~1 th- ~e~r-l c~aco of th~
1~IJU1~tOr. In ~l~it~o~, ~or ~ple for ~o~r~ an~
~ t~ o o~ratlonJ, t~o lnter~l ~c- of th~ lneu-l~or c~L ~l~o bo c., 3, ~t~ ~or ao~e tam~, tb.~t lc to ~y th- pr--~uro-t~g~t~os~ a~ ~e ~ .rily dl.~ r-~' w~h, 30 ~incc g-J i~clud~ the plast~c foa~ d~2uce~ ou~ only ~lowly .
Advas~,tag~ous ~ t~ of t~e ~rr~nt ~rLd of tb,o p;cc; duct~on methot~ e~er~e f ro~ the clal~a wh~c:h t~y~nd OD. Cla~ 1 arld Cla~L 5 resp~ctl~r~ly.
Acco~d$~gly, $~ a~ ad~ra~t-~o~ t o~ the pro~luction mothod, the ~nt~ al ~p~c~ o~ th~ ulator 1 fllled by ~stroduc~g ~ ~la-tlc co~po~d ~to th~
~ nt~ al ~spa~e o~ the ~oulatc~ a~d f~ ia ~ tic ao~pound, pre~era~ly with ~ ~d of a propell-~t. ~he 12~15~1998 15: 45 92511~1 LERNE~ ~REENBE~!~i PAGE 07 .
96 ~ 3443 - 4 -proE~ell It ~ ~r~ra~ly compo~ed, ~t le~-t p~rtially, of ~e elo~:tr~ cally well-in~ulat~n~ e~lph~-r hexafluor~de gas ~SF~ g~-~. Tho plastic foull ~oamed with SF, 5a~ h~
partlclllar~y good bL~ e~ anc-.
In a particu~arly ~d~r~tageou~ ~bodime~t, the pla~tic ~o~ i~ th- interu~l cpace of the in~ul~to~, at le~t o~re~ a predefiJ~ed ope~t~g t~ L~ture ra~5~
~der ~ po~iti~ pre~u~c a~a~e atmocph-ric ~ro~sure ~about 1 ~ar = 105 ~a). As a result, ~e pla-tic foam i~
~0 und~r llu;:~r-~cal ~t:C11~48-~ whi~h constitute an ~dditio~al ~af~g~ar~ against t:he fonl~atio~ of longit~c3;~ crap~ i~
the i~te~ ace o~ the lnJulator. In t}~e ~a~ of th~
prod~tio~ met~od, the pla~Sic co~poucd 1~ corr~ond-i~gly ~troduced i~to t~e ~t~ p~ce o~ the ~n~ tor al~e~dy u~der a po~ltiv~ pr~ure abo~e a~ Fbaric pre~sure. A~ a ~lt o~ t~- poJitlv- pr~J~r- w~
flll~n~ the pl~tic compou~d, the size of the gas bubbl~
ln t~e foam~d pla-tlc and honco tho d-u~ity of th-pla~t$c fo ca~ ~e adiuJted. The ~oo~tl~e ~re-oure ~n the l~t~ pace Or th~ ulator e~ ~e ~d~u-ted in partlcular ~y filli~ nltro~en ~a~ into the i~tarnal ~pace of ~ ul~tor.
A partlcularly ad~antaseou~ pla~tic fou~ 1~
polyur-e~an~ foum. A polyur~thano ~- Lou~ th~n ~S coyLs-~o~ n~ly u~ed ~ ehe pla~t~c c~
In or~er to ~Ypl~;~ th~ inv~ntion further, refer~c- i~ m-de to th~ iLdlv~dual fl~ure o~ tha dr~w-ing, ln which ~n ~x~mpl~ry '- ~ t o~ ~ ~rr~ng-~nt for tr-~s~utti~Lg light bQtween two locatlo~s at dlff-rent ~l-ctrio pot~ti~ illu~tr~t-d i~L ~c~mati-c ~or~.
A ~ir~ loc~tio3, w~ickL i~ lying at a~ ol~tric pot~tlal wh~ch 1~ po~ltiv~ ) with ~ t to ~~rt~
~ot~cLti~ do~ig~L~t-~ by 10, a~d a ~eao~d locatlon lyl~g at ear~h potontlaLl 1~ deslg~atod by 20. Th- poton-3~ ti~l dlf~ere~ae (~olta~e) ~ pravalling between the two~oca~lonJ 10 a~Ld 20 1~ rablr a ~g~ volt~gc, that 1 to ~ay ty~aally g~ater than abou~ 1 ~. S~ht i~
tr ~-mitt-d b-tw--n t~- two locat~o~ 10 4nd 20 ~
o~tlc~l u~ 9, in p-rticulas ~di~idu~l o~tical CA 022~8~30 1998-12-l~
12~î5~199~ 15:45 92511~1 LER~ER GREENBERG PA~E 08 g6 P 34~ - 5 -f i bro~ or optical ~Qr~u~tor c~ble~ gen-r~lly havln~ a plural$ty of f~r~, 4 a~d 5. Such ~n optlcal tran~-o~ pa~ ~ ~ in p~rt~ c~l~r of advaD.t~ge for the~lo~ or dig~tal t~AAsmis~lon of m ~ d ~ of 5 ~t le~t OAe ~ or (tranE~fon~er) which i~ loc~t-d at th~
fir~t loea~ on 10 at high volt~ge potentlal, ~d iJ not ~ own, fo~ me~urlng a phyl-~ c~ r~ ~le ~'c thc f ir~t location 10~ Suo~ or ~ay cu~ly, for exam~le, ~e~us~ed ~ a~ for ~ electric curre~ oz a~ elect~ic 10 ~rolta5~ a c~ t conducto~ lyin,g ~~ the ~igh ~roltage pot~n~ i~l, o~ els~ for a t~~oratu~ tt ia prefer~l~ ~ f th~ ~rJt opt~cal w~voguid~ pro~ridod for tt~e opt~cal tr~s~lo~ o~ the ~e~ured ~l~al.o ~xo~ t~ or ~not ~hown) ~Aa th~ nd optical ~ lde 5 for t~ opt~cal 15 tra~m~ Jl-~ OD~ of th~ foF t~e -~n -~r.
For the ~l~ct~.c~lly ~~f~ ulat~d gu~d7~0 of the o~tlcal w~vo~ 4 a~d 5 ~ro~ t~- ~lr~t location lO
to th- ~-cor-d locat~ o~ 20 ov~ tbe ~ot~tia~ dif f~ronco pr~r,allng between tho t~o locationJ 10 ~d 20, a~
20 o~ ~c~ric ln~ Cor 2 i~ ~rovl~d. ~hc ~ul~tDr ~ulator hou~ing ~ ulator fltt~n~l) 7, ~Irh~ch ~uL~G~d~
a~ lnter~ ~pac~ 3 in ~ pre~re-tlS7ht ~er (he etl-cally). The lnsulato~ b~ouaing 7 ces~prl~-~ a tu~ular carrl~r ~t and ~h~d~ ~l, a~r~,~_~ on~ ~d~r ~ot~er 25 arou~-l tbl~ c~rrl-r p~rt, ~n ord~r ~o le~ngthen the surfac- cr-op pat~ f or ~lectrlc c~ curr~t~, ~he - ~tl~ ul-tor houJ~ 7 ~y be co~poc-d of ~or~
or el~-- o~ a gl~-f$~r--relrLforcetl pla~tlc, t~ ~hed~ 21 ~leo bci~g ~le to b~ for~d ~ p~Lrtlcul~r ~ro~ eil~ co~
30 gel (~ con~ ~aompousld i3eulator).
~ t tl~e upper er~d, fac~ the flr~t loc~ion 10, of 'ch~ ~u~ul~tor hou-~n~ 7, provlslon 18 m~d~ ~ch cae- o~ a pre~ur~-ti~ht ~--o~n~ 8~ fo~ t~ ~lr~t optic~l ~ v _~ide 4 au~d 5A for t~e ~ A o~tlq~ v ~ de 5 .
35 ~he optical w~veg~ldes 4 aDd 5 ru~ t~ouS~h th- b~ ir~
8A ~d ~A through t~e ln~l~tor hcu~g 7 into internsl ~p~ce 3 of th~ in~ul~,tor a . The o~t~ a~l wave-4 ~nd 5 su~ ~hrough the ~ntir- i Ater~al spac~ 3 ~
far ~ t~- lowo~ e~d, f~cing the ~eco~d loaat~o~s 20, of .
12~15,~199~ 15: 1F 9~51101 LERNER ~REEN~E~ PA~E ~9 96 P 34~3 - 6 -the in~U1~tOr hOU4i~g 7. ~ th$J 1OW~ o~d Of the 1n~U1atO~ ~OU~ 7, OnCe ~Ore tWO Pre~aUre- tLght bur~ n~c 1~ ~d 9~ t~o~5h t~o i~sul~tor b~ou~ ng 7 are ~ro~l t-d, throuS~ rhiah $n ea~h c:a~ osse of t~e optic S ~ ~.o ~ de~ 4 Or 5 1J ~n tu:~ led ou~ o~ er~l ~PaCe 3 i~ltO frae ~p~ce. Tb,~ b~ ~5~ ~A ~t ~, ~d 9A
A~d 9B ~ be O ril~g ~ea1J 0~ elac o~$Ag- J~led with c~ llco~. T~ opti~ lde~ ~, a~d 5 ca~ ba arra~g~,d, ~a illu~l:r~t~d, su~t~tlally rec~ rly tl:Lroug~ t~e 10 ~nte~l Jyi~ce 3 o~ e~ tially t~e ~horte~t pa~ b~tw~
tha two loc:atlo~s 10 a~c~ 20, b~ c~ ~l~o t~lce ~ot~er co~-, for ~ in t;~e foml o~ a hellx or s~lr~l.
T~e optic~1 w~vog~de~ 4 ~d S are ~rr~ed th~ iAte~al ~ac~ 3 wit~in h ~ JtlC fo~ 6, w~t~ whlch 1~ the ~t.i~ te~al s~ce 3 of t~e 1 n~ul~to~ 2 19 ~ d.
~I'he pl~ct~c ~o~ 6 ~lxe~ th- optlc-~ wa~e~u~ deJ ~ and 1~ t~-lr Fr-~So~ d cour-- a~fi cc~pletely surrou~d~ e optical w~ve~lde~ 4 ~nd 5.
Th~ pl~t~ c faa~ 6 i~ g~ rally c~s~d o~l one 2 0 c~r ~re pl~ ic~ witl~ ga~ inclu~ion~ (pores, S~
. Por ~le, a pol~propyl~ ~O~t ~olyo~yl~ foa~, a poly~tyr~ foa~, ~ ~olyvi~yl c~lorid~ foaDI or ~l~a ~ ~eactav- r~o~ ~oa~, i~ p~r-~c~l~r a ~olyuret~n~ fo~m, c~ bo u~d ~- t~- pl~tlc ~5 foa~ ~, wh1ch ~y ~ ~ac}~, c~- b- pr~ s~ ~ ln ~ lC~owD
C~ !;~ 1, ~ pl--~t~c ~ co~o~d ( chort: pl~Jtlc c ~ c foa~d wlt~ tl~ a~ d o~
phy~ic~l ~/o~ ~ aho~laal proF~ rt to ~os~ th- pl~lc fo~ 6 . I~ part~ cul-r, the ~ ~y be ~.~G te~ by ~
30 p,or~ t, for _- _ l~ n~trog~ or a - po-cl~ly h~lo~~~at~d hydroc~s~b~ ga~ partlc~larly ~dY~t~geou-pla~tic ~o~ 6 i~ ~ pla~tlc ~o~ w~ th 8P~ sa~ l~clu~
which ~i~cul~t~ ct~l~a~ly p~rtlcul~rly well. ~o t~
~dt ~o pl~ct~c O~O~a ~ ~ fo~ed u~iD,g SF, A- the 3 5 ~rop~ t .
A ~it;~l~ polyu~ha~l- c _ t~ ~o~ t~se pla~tlc fo~ 6 i~ the ~roduct ~ t~e ~rad~ n~ Gil~ath~s~
Çrom t~ Dl~ comp~ny, whlch 1~ pre~er~ly fo~ed wlth SP~
1~15,J19~ 15: 4~ 9251101 LER~IER GF!EE~IBEPG PA~E 10 9~ P 3443 - 7 -~ he p~ a~t~ c fo ~ a ~re~er~ly plac~l ~der a ~ositi~e pres.u~e, wb,ich li~J a~ove the normal ~ir pre~RUre at th~ ~te of the arr~ge~cnt. ~ ~ re~ult, t:he plast~c fo~ 6 ~d t~- optic~l w~v~ d~ ~ ~d 5, a~
well as tSe i~ ll of th~ ulator hou~lng 7, do ~ot need to euter in~o ~y chomic~l ~o~d~ nc~ the f orm~ -t~on of lonl;rit~l~{n~l gap~ irL t~e d~r-ctio~ of the el-ct:cic fi-ld betwe~n t~e t~o loa-t~ ons 10 ~d 20 1 ~
~eli~bly avoited ~ly by th- poJltiv- ~re8~urc ~d ~e 10 mi~h~; cal ~tre~- ~$fcctçd there~y ~ th~l ~nterr~-l J~ace 3~
In ord~r to produce the arr~SJ~nt ilJ.u-tr~te~, the follow~g m-~hod ~y ba uc-d~ ~ .
In a fl~t ~t~od ~tap, th~ optic~ ..id-~ 4 a~ 5 15 ~re draw~ i~to t~ i~t~ p~c~ 3 of th~ tor 2 throu~ th- b~ A and 8B, ~d 9A ~d ~B, ~d L~..gLt ~to t~e d~ d ~hap-.
In a seaos~d m-thod ~top, n$troS~ d-r a pra-- ~lo~$~ed po~tlve pro~ur~ ~lth ~e~ct to at~o~
20 pres~ura ~l barl, fo~ ~x~ple u~der a pr~uro o~ 3 barJ
roducad ~ nto th~ ~ ~t~l opace 3 o the l~ulator a.
I~ a t~l~d ~od ~tep, the r~=~n~n,q ~nt~
space 3 ~ ~U~O~ nÇI ~h~ opt:lc~ r--guidao ~ 5~ Of 2S tS- ln~ulato~ ~ i~ fill~d with a pla~tic com~ou3d, for example A ~r~oly~er e~ ~~' ~nd pr-f-rably a polyuretha~ mould~ng ~o~pou~d, ~d ~o~mcd, preferably wlth 8~c ga~. Th- ~ltro~e~ e-cape~ to ~ la~ge ~xtent dur$n~ t~ f~ g op~rat~o~. Th~ po~t~ve ps--cur~ w~lch ~J ~-t ~ith the a~d of t~ nitrogen ~ a~ to cet ~
~eJlred ~12e ~3d den~ity o~ the g~- inc~u~ion~ in t~e pl~tic f4am 6. ~ thi~ c~e, the pre~ure lc ~el~cted ouch'that a ~llg~t po~it~ pr~ur- r~maln~ $~ the ~nternal ~~ace 3 ~ter the fQ ;n~ op~rat~o~.
In a fourt~ m~t~od c~ep, the ir~ter~ cpace 3 ~ ~
~sled, ~n a pres-ur--t~ght ~er, i~ ~hat ~ ~ r ~ g prov~ ded in the in~ulator ~ ny ~ for the ~o o~
lntroduclnsJ the nit;cog~ a~d the pl~tic fo~ 6, as~
opt~on~lly ~1JC th- b~h~n~ 8A, 8J, 9~ ~nd 9B, ~re l''tl5,~1998 15: 45 9~5;101 LERNER GREENBERI~ P,4GE 11 .
~ 9 6 P 3~43 - 8 clo~d ~n ~ ~r-~ur~-tlght ~ er.
. .
,",, , ~
l~e~c~ipt~o:~
l~r~ent ~o~ tr~m~ttin~ 1~ ght }~etwee~ two loeatio~c at dlffer~t ~l-ctric p~t~ntial, ~r~d "~ethod o~ producing ~uch a~ ~ ~ ~y t l~ne ~ n~ t~ o~ re~ate~ to A~ a~ra~sl~t ~or tra~mittl~g llgh'c betw~e~ two locatlono at diff~rent el-ct~ic pote~eial. T~ in~.r~tio~ ~urth~r r~lat~ to ~.
~tbod of produci~g ~ arra~y.. . t ~c~ t;ca~ttl~g li~t betw~ two locat~ on~ at d~ f ferent eloctric pot~ntial .
I3 ord~r to ~ e p~y~ical va~iabl~c, ~uch a8 ~1 ~ctric curr~:Lt or ~l~ctric volt--ger for ~?lo~ at h~gh volt~ye pote~ti~l, t~o m a-ured ~ t ~-t~ ~tt~d f~om sen-ors ~rovided lrl order to m~ th-v~ri ~ ~ i~ a m~r wl~lch 1- at a ~otQ~ltt al ~ rated 15 from ~~rt~ .pot-nt~al . I?c~t~tlal-~re~ tr~l~ on o~ the m~7~ ig~al~ osslbl~, ~J ~ hlow~, ~n th~ ~o~m of o~t~cal ~lg~al~ v~a o~tical wav~gulde~, wh~ch are l~d from the h$~ volt~ge poten~i~l to earth potont$al.
8y~te~ are ~ o l~o~m in which, $s~ addlt$on tc~ tho 0 sllea~urad ~ , th~ r f or the ~cn~orJ wh~ch are l~cate~ on the high ~roltas~e lde i~ ~lco tr~lt~-d ~pt~c~lly ~i~ o~tlcal wa~esJulde~.
~ optical ~ id~ h~v~ to b~ prot~at-d ag~ n~t ~ c~-n~ c~l ~trea~e~ . I~rt~ ol. ~or the 25 ~lcctr~cal in~ulation, ~ ~uff~al~tly ~h electrical b~ --k~ P ~d g-n~rally aleo ~ ~uf f ~ cie~tly h~gh ~l~ctrlcAl cr~-p p~th betw~en t~e high ~oltag- ~f.de ~d t~e ~a~th ~ot~ntla~ ~id- ~u~t be e~ured.
E~?-B-0 26S 737 ~aa dlsaloc~d an a~a~g~e~t for 30 tr~n~lttlr~g t~o m~aourod ~ of a ~ur~t tra~c-for~r ~t ~igh voltase potent~l to earth pot-nt~l {P.
th~ ~onll of ol?t~c~ B. ~1~ kno~ nt co~pri~ tubular h~ ~h ~oltaç~e i ~ul~to~
vert$eal ly f rom the aurrent tr~ f or~or to the b~e, 3 5 w~ic~ i~ lyi~g at e-rth potene$al, the ~ ~ul-tor ~elng d- of c-~asp,lc o~ s~ fi~re-rc~forc~d pla~t~¢ (G~P~, ~d o~ or ~ore optieal co~du~:tor~ ~n ~n opt~cal 1~15/199~ 15: 45 ~51101 LERNE~ ~REENE~ERG PAI~iE 05 cond~ctor cable, wh~ch 1~ l~d ~n ~ h~llx throu~h ~n ine-~n-l ~pace of the hig~ ~ltage in~ul~tor. ~he optical me~ur-d ~lg~ a~ tr-nJm~tte~ th~ opt~cal ~o~-ductor-. The int~rnal ~pace of t~- h~g~ volta5~ inaulator e~n be fille~ with ~ir o~ ~ith an i~ul~t~y ga~, Juch ~
nitrogen (N,) or ~ul~ur ~exafluor~d~ ~5F~). T~ A~ot~er ~ ;ment of t~ kcown ~~a~ t, the optlcal co~tor cable i~ wou~d Qxt~r3ally ln ~ h~l~x onto ~h~
i~-~l~tor tube ant ~ t' in ~ ca~t-on ~ilicon l~yer or }O e~e~ co8pl~t~ly cov~rod ~y the ~ con layer. I~
additlo~, ~ilicon ~h~d~ to l~ngt~en t~ ~ur~a~e cree~
pa~h ~re ~ormed wl~ icon lay~r~ I~ the ca~a o~
the arr~5~ -nt di~elo~-d by 15P-B-0 265 737, ~n th me~t wit~ ~n~ ,ti~g SJ~ th~ in~ul4tl~g g~ t 15 b~ reflllod in the c~s~ of l-~cs, for ~xa~pl~ du~:ing mount~g op~ratlon~. I3 th- c-~- of t~ ~mboddln~ of th~
opt~cal cond~tor cabl~ llcon, probl~- m~y a~iee ~t the int-rf~ce bet~e~n t~e ~il$con aAd t~- optlcal co~-tuctor cable, a~ a re-ult o~ ther~l ~olu~ ch~ng-c of the ~ilico~ durlng temperature c~a~ge~. ~he~e ~olu~
~ can lead to lo~g$e~ n-~ g~ ~ n ~- clllcon along the o~tic~l c~n~uctoz c~bl~, ~nto whic~ ~ap~
~ol~ture c~n p~etrat~ Thi- ca~ r-~ult $n cr-opln~
~ r~e-.
The i~ O~:L $~, th~, b~-J~d on tA~ ct o~
~-cl~!y~ a~ ax~gement for trA~tt~g l~ht b-t~o~
two locatlo~ at di~ferent elsct~c ~?o~tl--l, ~d ~ethod of producln5r an a.~ t ~or trsncm~ttin~
betwe--n two locatlon~ at di~r~lt ~l~ctrlc: ~otential, wlth wh~ ch the clted proble~s 1~ thc pr~ or B~t a~e avolded .
Accord;L~g to th~ .r~tlo~, thi~ ¢t i~
A~:h~ red w~ th the ~t lr~ of Cl~lm 1 ~d of Cl~Lim 5 r~spectlvely.
3 5 Th~ arr~g~ner~t accordln9 to Claim 1 for tr~-~ttin~ }lght between two loc~t~on- ~t dl~er~t electr~ c ~otentlal co~p~a-e~
a) a~ innul~tor, w2~ich ic ~rr~n~ed betwee3 t~a ~wo loc~tion~ ~t ~ erent pote3t~al arld ~ nte~al . .
12~15il998 15: 45 9251101 LERNE~ GREEI~BERG PA~E 0 ~6 P 3443 - 3 -~p~ce which 1~ clo~ed ~ t~tially pr~J~ur~-t ig~t ~a~r, ~d b) at le-~t on- cptical w~regu~ do~ let thrDug~ the int~r~al cpac- o~ th- a~ulato~, for trau~ttiug the 1 lght, c~ th- int~ c- of ~he ~ Julator bcing rill-d wlth pla~tlc foam, wh~ch ~u ..\~d~ the At l~t o~e q?tic~l waveg~i~e.
I~ the c~e o~ th- ~thod accordl~ to Clai~ 5 for produc~ng ~n ~rr~ t ~or tr~n~mitting 1~ ~h~c b~L-_ tw4 loc--tion~ ~t dif~t el~t~ic pot~Ltl~l, n~Ulator wlt}~ a~ lnters~al Jpace ~d at le~Jt o~-opti~41 ~. v~ de for t~dttl~g t~ l.lght ar-~rovlded, lS b~ tho at l~ t on~ o~tlcAl wa~v~ulde ~ J lalt throug the i~t~ c~ac~ of ths lnculator a~d c) th~ i~'cer~l ~p~ce o~ the :Ln~ul~or, art-r the t ay~g of tS~ ~t l~a-t o~- optlc~
d w~ th pla~tlc ~o~ ~nd sul~e~ ly ~oalod 1 ~ yroo~ur--tig~t ma~-~.
A~ a re~ult of ~he ~ n~ of t~e ~ nt~ c~ac~
of t~ ul ato~ wlth pl~ctlc fo~ ood el~ctrlcal ~n~ tlon of the two pot~t~al el~de~ f~o~ a~ç~ othes 1 ac~l-vod, ~ $~ ~oo~ h~r~ica~ ~roteGt~oD. of t~e ~t 25 l-a~t o~LC optic~ ~vos~do 1~1 th- ~e~r-l c~aco of th~
1~IJU1~tOr. In ~l~it~o~, ~or ~ple for ~o~r~ an~
~ t~ o o~ratlonJ, t~o lnter~l ~c- of th~ lneu-l~or c~L ~l~o bo c., 3, ~t~ ~or ao~e tam~, tb.~t lc to ~y th- pr--~uro-t~g~t~os~ a~ ~e ~ .rily dl.~ r-~' w~h, 30 ~incc g-J i~clud~ the plast~c foa~ d~2uce~ ou~ only ~lowly .
Advas~,tag~ous ~ t~ of t~e ~rr~nt ~rLd of tb,o p;cc; duct~on methot~ e~er~e f ro~ the clal~a wh~c:h t~y~nd OD. Cla~ 1 arld Cla~L 5 resp~ctl~r~ly.
Acco~d$~gly, $~ a~ ad~ra~t-~o~ t o~ the pro~luction mothod, the ~nt~ al ~p~c~ o~ th~ ulator 1 fllled by ~stroduc~g ~ ~la-tlc co~po~d ~to th~
~ nt~ al ~spa~e o~ the ~oulatc~ a~d f~ ia ~ tic ao~pound, pre~era~ly with ~ ~d of a propell-~t. ~he 12~15~1998 15: 45 92511~1 LERNE~ ~REENBE~!~i PAGE 07 .
96 ~ 3443 - 4 -proE~ell It ~ ~r~ra~ly compo~ed, ~t le~-t p~rtially, of ~e elo~:tr~ cally well-in~ulat~n~ e~lph~-r hexafluor~de gas ~SF~ g~-~. Tho plastic foull ~oamed with SF, 5a~ h~
partlclllar~y good bL~ e~ anc-.
In a particu~arly ~d~r~tageou~ ~bodime~t, the pla~tic ~o~ i~ th- interu~l cpace of the in~ul~to~, at le~t o~re~ a predefiJ~ed ope~t~g t~ L~ture ra~5~
~der ~ po~iti~ pre~u~c a~a~e atmocph-ric ~ro~sure ~about 1 ~ar = 105 ~a). As a result, ~e pla-tic foam i~
~0 und~r llu;:~r-~cal ~t:C11~48-~ whi~h constitute an ~dditio~al ~af~g~ar~ against t:he fonl~atio~ of longit~c3;~ crap~ i~
the i~te~ ace o~ the lnJulator. In t}~e ~a~ of th~
prod~tio~ met~od, the pla~Sic co~poucd 1~ corr~ond-i~gly ~troduced i~to t~e ~t~ p~ce o~ the ~n~ tor al~e~dy u~der a po~ltiv~ pr~ure abo~e a~ Fbaric pre~sure. A~ a ~lt o~ t~- poJitlv- pr~J~r- w~
flll~n~ the pl~tic compou~d, the size of the gas bubbl~
ln t~e foam~d pla-tlc and honco tho d-u~ity of th-pla~t$c fo ca~ ~e adiuJted. The ~oo~tl~e ~re-oure ~n the l~t~ pace Or th~ ulator e~ ~e ~d~u-ted in partlcular ~y filli~ nltro~en ~a~ into the i~tarnal ~pace of ~ ul~tor.
A partlcularly ad~antaseou~ pla~tic fou~ 1~
polyur-e~an~ foum. A polyur~thano ~- Lou~ th~n ~S coyLs-~o~ n~ly u~ed ~ ehe pla~t~c c~
In or~er to ~Ypl~;~ th~ inv~ntion further, refer~c- i~ m-de to th~ iLdlv~dual fl~ure o~ tha dr~w-ing, ln which ~n ~x~mpl~ry '- ~ t o~ ~ ~rr~ng-~nt for tr-~s~utti~Lg light bQtween two locatlo~s at dlff-rent ~l-ctrio pot~ti~ illu~tr~t-d i~L ~c~mati-c ~or~.
A ~ir~ loc~tio3, w~ickL i~ lying at a~ ol~tric pot~tlal wh~ch 1~ po~ltiv~ ) with ~ t to ~~rt~
~ot~cLti~ do~ig~L~t-~ by 10, a~d a ~eao~d locatlon lyl~g at ear~h potontlaLl 1~ deslg~atod by 20. Th- poton-3~ ti~l dlf~ere~ae (~olta~e) ~ pravalling between the two~oca~lonJ 10 a~Ld 20 1~ rablr a ~g~ volt~gc, that 1 to ~ay ty~aally g~ater than abou~ 1 ~. S~ht i~
tr ~-mitt-d b-tw--n t~- two locat~o~ 10 4nd 20 ~
o~tlc~l u~ 9, in p-rticulas ~di~idu~l o~tical CA 022~8~30 1998-12-l~
12~î5~199~ 15:45 92511~1 LER~ER GREENBERG PA~E 08 g6 P 34~ - 5 -f i bro~ or optical ~Qr~u~tor c~ble~ gen-r~lly havln~ a plural$ty of f~r~, 4 a~d 5. Such ~n optlcal tran~-o~ pa~ ~ ~ in p~rt~ c~l~r of advaD.t~ge for the~lo~ or dig~tal t~AAsmis~lon of m ~ d ~ of 5 ~t le~t OAe ~ or (tranE~fon~er) which i~ loc~t-d at th~
fir~t loea~ on 10 at high volt~ge potentlal, ~d iJ not ~ own, fo~ me~urlng a phyl-~ c~ r~ ~le ~'c thc f ir~t location 10~ Suo~ or ~ay cu~ly, for exam~le, ~e~us~ed ~ a~ for ~ electric curre~ oz a~ elect~ic 10 ~rolta5~ a c~ t conducto~ lyin,g ~~ the ~igh ~roltage pot~n~ i~l, o~ els~ for a t~~oratu~ tt ia prefer~l~ ~ f th~ ~rJt opt~cal w~voguid~ pro~ridod for tt~e opt~cal tr~s~lo~ o~ the ~e~ured ~l~al.o ~xo~ t~ or ~not ~hown) ~Aa th~ nd optical ~ lde 5 for t~ opt~cal 15 tra~m~ Jl-~ OD~ of th~ foF t~e -~n -~r.
For the ~l~ct~.c~lly ~~f~ ulat~d gu~d7~0 of the o~tlcal w~vo~ 4 a~d 5 ~ro~ t~- ~lr~t location lO
to th- ~-cor-d locat~ o~ 20 ov~ tbe ~ot~tia~ dif f~ronco pr~r,allng between tho t~o locationJ 10 ~d 20, a~
20 o~ ~c~ric ln~ Cor 2 i~ ~rovl~d. ~hc ~ul~tDr ~ulator hou~ing ~ ulator fltt~n~l) 7, ~Irh~ch ~uL~G~d~
a~ lnter~ ~pac~ 3 in ~ pre~re-tlS7ht ~er (he etl-cally). The lnsulato~ b~ouaing 7 ces~prl~-~ a tu~ular carrl~r ~t and ~h~d~ ~l, a~r~,~_~ on~ ~d~r ~ot~er 25 arou~-l tbl~ c~rrl-r p~rt, ~n ord~r ~o le~ngthen the surfac- cr-op pat~ f or ~lectrlc c~ curr~t~, ~he - ~tl~ ul-tor houJ~ 7 ~y be co~poc-d of ~or~
or el~-- o~ a gl~-f$~r--relrLforcetl pla~tlc, t~ ~hed~ 21 ~leo bci~g ~le to b~ for~d ~ p~Lrtlcul~r ~ro~ eil~ co~
30 gel (~ con~ ~aompousld i3eulator).
~ t tl~e upper er~d, fac~ the flr~t loc~ion 10, of 'ch~ ~u~ul~tor hou-~n~ 7, provlslon 18 m~d~ ~ch cae- o~ a pre~ur~-ti~ht ~--o~n~ 8~ fo~ t~ ~lr~t optic~l ~ v _~ide 4 au~d 5A for t~e ~ A o~tlq~ v ~ de 5 .
35 ~he optical w~veg~ldes 4 aDd 5 ru~ t~ouS~h th- b~ ir~
8A ~d ~A through t~e ln~l~tor hcu~g 7 into internsl ~p~ce 3 of th~ in~ul~,tor a . The o~t~ a~l wave-4 ~nd 5 su~ ~hrough the ~ntir- i Ater~al spac~ 3 ~
far ~ t~- lowo~ e~d, f~cing the ~eco~d loaat~o~s 20, of .
12~15,~199~ 15: 1F 9~51101 LERNER ~REEN~E~ PA~E ~9 96 P 34~3 - 6 -the in~U1~tOr hOU4i~g 7. ~ th$J 1OW~ o~d Of the 1n~U1atO~ ~OU~ 7, OnCe ~Ore tWO Pre~aUre- tLght bur~ n~c 1~ ~d 9~ t~o~5h t~o i~sul~tor b~ou~ ng 7 are ~ro~l t-d, throuS~ rhiah $n ea~h c:a~ osse of t~e optic S ~ ~.o ~ de~ 4 Or 5 1J ~n tu:~ led ou~ o~ er~l ~PaCe 3 i~ltO frae ~p~ce. Tb,~ b~ ~5~ ~A ~t ~, ~d 9A
A~d 9B ~ be O ril~g ~ea1J 0~ elac o~$Ag- J~led with c~ llco~. T~ opti~ lde~ ~, a~d 5 ca~ ba arra~g~,d, ~a illu~l:r~t~d, su~t~tlally rec~ rly tl:Lroug~ t~e 10 ~nte~l Jyi~ce 3 o~ e~ tially t~e ~horte~t pa~ b~tw~
tha two loc:atlo~s 10 a~c~ 20, b~ c~ ~l~o t~lce ~ot~er co~-, for ~ in t;~e foml o~ a hellx or s~lr~l.
T~e optic~1 w~vog~de~ 4 ~d S are ~rr~ed th~ iAte~al ~ac~ 3 wit~in h ~ JtlC fo~ 6, w~t~ whlch 1~ the ~t.i~ te~al s~ce 3 of t~e 1 n~ul~to~ 2 19 ~ d.
~I'he pl~ct~c ~o~ 6 ~lxe~ th- optlc-~ wa~e~u~ deJ ~ and 1~ t~-lr Fr-~So~ d cour-- a~fi cc~pletely surrou~d~ e optical w~ve~lde~ 4 ~nd 5.
Th~ pl~t~ c faa~ 6 i~ g~ rally c~s~d o~l one 2 0 c~r ~re pl~ ic~ witl~ ga~ inclu~ion~ (pores, S~
. Por ~le, a pol~propyl~ ~O~t ~olyo~yl~ foa~, a poly~tyr~ foa~, ~ ~olyvi~yl c~lorid~ foaDI or ~l~a ~ ~eactav- r~o~ ~oa~, i~ p~r-~c~l~r a ~olyuret~n~ fo~m, c~ bo u~d ~- t~- pl~tlc ~5 foa~ ~, wh1ch ~y ~ ~ac}~, c~- b- pr~ s~ ~ ln ~ lC~owD
C~ !;~ 1, ~ pl--~t~c ~ co~o~d ( chort: pl~Jtlc c ~ c foa~d wlt~ tl~ a~ d o~
phy~ic~l ~/o~ ~ aho~laal proF~ rt to ~os~ th- pl~lc fo~ 6 . I~ part~ cul-r, the ~ ~y be ~.~G te~ by ~
30 p,or~ t, for _- _ l~ n~trog~ or a - po-cl~ly h~lo~~~at~d hydroc~s~b~ ga~ partlc~larly ~dY~t~geou-pla~tic ~o~ 6 i~ ~ pla~tlc ~o~ w~ th 8P~ sa~ l~clu~
which ~i~cul~t~ ct~l~a~ly p~rtlcul~rly well. ~o t~
~dt ~o pl~ct~c O~O~a ~ ~ fo~ed u~iD,g SF, A- the 3 5 ~rop~ t .
A ~it;~l~ polyu~ha~l- c _ t~ ~o~ t~se pla~tlc fo~ 6 i~ the ~roduct ~ t~e ~rad~ n~ Gil~ath~s~
Çrom t~ Dl~ comp~ny, whlch 1~ pre~er~ly fo~ed wlth SP~
1~15,J19~ 15: 4~ 9251101 LER~IER GF!EE~IBEPG PA~E 10 9~ P 3443 - 7 -~ he p~ a~t~ c fo ~ a ~re~er~ly plac~l ~der a ~ositi~e pres.u~e, wb,ich li~J a~ove the normal ~ir pre~RUre at th~ ~te of the arr~ge~cnt. ~ ~ re~ult, t:he plast~c fo~ 6 ~d t~- optic~l w~v~ d~ ~ ~d 5, a~
well as tSe i~ ll of th~ ulator hou~lng 7, do ~ot need to euter in~o ~y chomic~l ~o~d~ nc~ the f orm~ -t~on of lonl;rit~l~{n~l gap~ irL t~e d~r-ctio~ of the el-ct:cic fi-ld betwe~n t~e t~o loa-t~ ons 10 ~d 20 1 ~
~eli~bly avoited ~ly by th- poJltiv- ~re8~urc ~d ~e 10 mi~h~; cal ~tre~- ~$fcctçd there~y ~ th~l ~nterr~-l J~ace 3~
In ord~r to produce the arr~SJ~nt ilJ.u-tr~te~, the follow~g m-~hod ~y ba uc-d~ ~ .
In a fl~t ~t~od ~tap, th~ optic~ ..id-~ 4 a~ 5 15 ~re draw~ i~to t~ i~t~ p~c~ 3 of th~ tor 2 throu~ th- b~ A and 8B, ~d 9A ~d ~B, ~d L~..gLt ~to t~e d~ d ~hap-.
In a seaos~d m-thod ~top, n$troS~ d-r a pra-- ~lo~$~ed po~tlve pro~ur~ ~lth ~e~ct to at~o~
20 pres~ura ~l barl, fo~ ~x~ple u~der a pr~uro o~ 3 barJ
roducad ~ nto th~ ~ ~t~l opace 3 o the l~ulator a.
I~ a t~l~d ~od ~tep, the r~=~n~n,q ~nt~
space 3 ~ ~U~O~ nÇI ~h~ opt:lc~ r--guidao ~ 5~ Of 2S tS- ln~ulato~ ~ i~ fill~d with a pla~tic com~ou3d, for example A ~r~oly~er e~ ~~' ~nd pr-f-rably a polyuretha~ mould~ng ~o~pou~d, ~d ~o~mcd, preferably wlth 8~c ga~. Th- ~ltro~e~ e-cape~ to ~ la~ge ~xtent dur$n~ t~ f~ g op~rat~o~. Th~ po~t~ve ps--cur~ w~lch ~J ~-t ~ith the a~d of t~ nitrogen ~ a~ to cet ~
~eJlred ~12e ~3d den~ity o~ the g~- inc~u~ion~ in t~e pl~tic f4am 6. ~ thi~ c~e, the pre~ure lc ~el~cted ouch'that a ~llg~t po~it~ pr~ur- r~maln~ $~ the ~nternal ~~ace 3 ~ter the fQ ;n~ op~rat~o~.
In a fourt~ m~t~od c~ep, the ir~ter~ cpace 3 ~ ~
~sled, ~n a pres-ur--t~ght ~er, i~ ~hat ~ ~ r ~ g prov~ ded in the in~ulator ~ ny ~ for the ~o o~
lntroduclnsJ the nit;cog~ a~d the pl~tic fo~ 6, as~
opt~on~lly ~1JC th- b~h~n~ 8A, 8J, 9~ ~nd 9B, ~re l''tl5,~1998 15: 45 9~5;101 LERNER GREENBERI~ P,4GE 11 .
~ 9 6 P 3~43 - 8 clo~d ~n ~ ~r-~ur~-tlght ~ er.
. .
Claims (5)
1. Arrangement for transmitting light between two locations at different electric potential comprising a) an insulator (2), which is arranged between the two locations at different potential and has an internal space (3), and b) at least one optical waveguide (4, 5), led through the internal space (3) of the insulator (2), for transmitting the light, c) the internal space (3) of the insulator (2) being filled with plastic foam (6), which surrounds the at least one optical waveguide (4, 5).
d) the plastic foam (6) being foamed with sulphur hexafluoride gas (SF6 gas), and e) the plastic foam (6) in a predefined operating temperature range being under a positive pressure above atmospheric pressure.
d) the plastic foam (6) being foamed with sulphur hexafluoride gas (SF6 gas), and e) the plastic foam (6) in a predefined operating temperature range being under a positive pressure above atmospheric pressure.
2. Arrangement according to claim 1, in which the plastic foam is a polyurethane foam (6).
3. Method of producing an arrangement for transmitting light between two locations at different electric potential, in which, a) an insulator (2) with an internal space (3) and at least one optical waveguide (4, 5) for transmitting the light are provided, b) the at least one optical waveguide (4, 5) is laid through the internal space (3) of the insulator (2) c) the internal space (3) of the insulator (2), after the laying of the at least one optical waveguide, is filled with plastic foam (6) and subsequently sealed.
d) the plastic foam is foamed with a propellant which at least partly consists of sulphur hexafluoride gas (SF6 gas), and e) a positive pressure is provided above atmospheric pressure in the internal space (3) of the insulator (2).
d) the plastic foam is foamed with a propellant which at least partly consists of sulphur hexafluoride gas (SF6 gas), and e) a positive pressure is provided above atmospheric pressure in the internal space (3) of the insulator (2).
4. Method according to claim 3, in which, in order to fill the internal space (3) of the insulator (2), a plastic compound is introduced into the internal space (3) and this plastic compound is foamed using a propellant.
5. Method according to claim 3, in which the positive pressure is produces by filling nitrogen gas into the internal space (3) of the insulator (2).
5. Method according to claim 3, in which the positive pressure is produces by filling nitrogen gas into the internal space (3) of the insulator (2).
5. Method according to one of claims 4 to 5, in which a polyurethane compound is used as the plastic compound.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19624091.3 | 1996-06-17 | ||
| DE19624091A DE19624091A1 (en) | 1996-06-17 | 1996-06-17 | Arrangement for transmitting light between two locations with different electrical potential and method for producing such an arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2258530A1 true CA2258530A1 (en) | 1997-12-24 |
Family
ID=7797151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002258530A Abandoned CA2258530A1 (en) | 1996-06-17 | 1997-05-28 | Device for transmitting light between two points with a different electric potential and process for manufacturing such a device |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP0906584B1 (en) |
| CN (1) | CN1113262C (en) |
| AR (1) | AR007580A1 (en) |
| BR (1) | BR9709834A (en) |
| CA (1) | CA2258530A1 (en) |
| DE (2) | DE19624091A1 (en) |
| DK (1) | DK0906584T3 (en) |
| IN (1) | IN192315B (en) |
| NO (1) | NO985909L (en) |
| RU (1) | RU2162242C2 (en) |
| WO (1) | WO1997048996A1 (en) |
| ZA (1) | ZA975258B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219108B (en) * | 2013-04-19 | 2016-02-24 | 江苏神马电力股份有限公司 | Insulator manufacture method |
| CN103310922B (en) * | 2013-06-14 | 2016-05-04 | 江苏神马电力股份有限公司 | With the insulator manufacture method of wire rod |
| CN103337318B (en) * | 2013-06-14 | 2016-04-06 | 江苏神马电力股份有限公司 | Insulator core rod manufacturing method |
| DE102019125962A1 (en) * | 2019-09-26 | 2021-04-01 | Maschinenfabrik Reinhausen Gmbh | Dry, syntactic foam as an electrically insulating material |
| GB2585960B (en) * | 2019-11-29 | 2022-04-20 | Afl Telecommunications Europe Ltd | A system for guiding a dielectric cable from phase-to-ground potential |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2901872A1 (en) * | 1979-01-18 | 1980-07-31 | Siemens Ag | High voltage insulator with internal optical fibre - has optical fibre located between inner constructional layers for control transmission to power line |
| CH671639A5 (en) * | 1986-10-24 | 1989-09-15 | Bbc Brown Boveri & Cie | |
| CA2000711C (en) * | 1988-10-14 | 1994-10-25 | Shoji Seike | Optical fiber composite insulator and method of producing the same |
| DD300495A7 (en) * | 1988-12-19 | 1992-06-17 | Technische Hochschule Zittau,De | COMPOSITE INSULATOR WITH FOAM CABLE |
| DE4227410C1 (en) * | 1992-08-19 | 1993-11-04 | Felten & Guilleaume Energie | Overhead line termination for optical fibre phase cable - has tubular ceramics isolator fitted with internal plastics reinforced sleeve filled with foamed elastomer material |
| DE9413136U1 (en) * | 1994-08-13 | 1994-10-13 | Kabelmetal Electro Gmbh | Coaxial radio frequency cable |
-
1996
- 1996-06-17 DE DE19624091A patent/DE19624091A1/en not_active Withdrawn
-
1997
- 1997-05-28 WO PCT/DE1997/001078 patent/WO1997048996A1/en active IP Right Grant
- 1997-05-28 DE DE59707064T patent/DE59707064D1/en not_active Expired - Fee Related
- 1997-05-28 CA CA002258530A patent/CA2258530A1/en not_active Abandoned
- 1997-05-28 CN CN97194276A patent/CN1113262C/en not_active Expired - Fee Related
- 1997-05-28 RU RU99101063/28A patent/RU2162242C2/en not_active IP Right Cessation
- 1997-05-28 DK DK97925878T patent/DK0906584T3/en active
- 1997-05-28 EP EP97925878A patent/EP0906584B1/en not_active Expired - Lifetime
- 1997-05-28 BR BR9709834A patent/BR9709834A/en not_active IP Right Cessation
- 1997-06-02 IN IN1021CA1997 patent/IN192315B/en unknown
- 1997-06-13 AR ARP970102591A patent/AR007580A1/en not_active Application Discontinuation
- 1997-06-13 ZA ZA9705258A patent/ZA975258B/en unknown
-
1998
- 1998-12-16 NO NO985909A patent/NO985909L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| DK0906584T3 (en) | 2002-08-12 |
| NO985909L (en) | 1999-02-17 |
| RU2162242C2 (en) | 2001-01-20 |
| CN1217072A (en) | 1999-05-19 |
| NO985909D0 (en) | 1998-12-16 |
| ZA975258B (en) | 1997-12-17 |
| AR007580A1 (en) | 1999-11-10 |
| EP0906584B1 (en) | 2002-04-17 |
| DE59707064D1 (en) | 2002-05-23 |
| EP0906584A1 (en) | 1999-04-07 |
| IN192315B (en) | 2004-04-03 |
| DE19624091A1 (en) | 1997-12-18 |
| BR9709834A (en) | 1999-08-10 |
| WO1997048996A1 (en) | 1997-12-24 |
| CN1113262C (en) | 2003-07-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |