VIENNE: New and improved materials for electrotechnology

Summary

The limits of current technology are frequently set by the availability or otherwise of suitable materials. Materials may be used for constructional purposes or in more active roles as a consequence of their special electrical, magnetic, insulating, dielectric or other physical properties. Concerns are new or improved materials and their applications in electrical apparatus. Solids, liquids or gases with novel properties that can be utilised in electrotechnology. Information on the performance of these materials.

1 - LATEST DEVELOPM ENTS OF MATERIALS FOR SPECIAL PURPOSES

Section 1 - Materials for very low (cryogenic) temperatures

100-0 J.L. SABRIE. Rapport Spécial / Special Report
100-01 J. GERHOLD (Austria). Dielectric strength of gaseous and liquid insulants at low temperatures
100-02 H. KÔFLER. E. TELSER (Austria). Wire insulation applicable in cryogenic seNice
100-03 B. DALLE. A. ANSART. HOANG GIA KY. P. DU BOTS (France). Caractéristiques des brins supraconducteu rs utilisables en régime alternatif
100-04 J.C. BOBO. J. POITEVIN. H. NITHART'(France). Tenue diélectrique des isolants à 4.2 K
100-05 IA GLEBOV. YA.B. DANILEVICH. L.T. PONOMA REV. O.S. BOGOYAVLENSKY (USSR). The bonding material for superconducting magnetic sys tems
100-06 M. KAHLE. P. FROSCH (German Dem. Rep). Application problems of LN2/paper-insulation
100-07 L. INTICHAR. HW. N EUMULLER. T.S. KULIG (Fed. Rep. of Germany). Requirements for supercon ductors to be used in turbogenerator field win dings
100-08 H. KRAU TH (Fed. Rep of Germany). Multifilamen tary NbTi and Nb3Sn suriP.rconductors for pulse magnets and electrical machines
100-09 P. KOMAREK A. NYILAS (Fed Rep of Germany), characterization of super conductors and insulating materials at cryogenic temperatures for use in electrical engineering

Section 2 - Special means for the transfer of information from high voltage to ground

200-0 P. PIFFARETTI. Rapport Spécial / Special Report
200-1 A.A. MENEZEZ JR.. E.M. COSTA. J.I. SILVA FILHO. G.L. FEITOSA. (Brazil). Real time monito ring system for surface temperatures of overhead conductors
200-2 M.P. GREAVES. J.S. McCORMACK. M.D. ROWE. R.M. BOOTH. B.J.BRENT (United Kingdom). The development and tesî of an optical fibre tempera ture senso r for use at high voltage in turbine generators
200-3 V.M. KOPILOV. I.T. OFCHINNIKOV. S.G. SARIN E.V. YANSHIN (USSR) New electro-optical measuring system for insulation quality contrai under the high voltage stresses

Section 3 - Conducting materia/s and magnetic core materials

300-0 D.J. ALLAN. Rapport Spécial / Special Report
300-1 M.IEDA. T. MIZUTANI. Y. SUZUOKI. A. OHKI (Japan). Conduction and degradation mecha nisms of zinc oxide varistors
300-2 A. KOZLOWSKA (Polànd}. Application of a vec tormeter to investigate the cores wound with amorphous ribbon
300-3 J. GALAND. B. LELIEVRE. J.C. NICOUD (France).Conducteurs en aluminium et alliages d'alumi nium : nouveaux développements
300-4 P. SCHÔNHUBER. H. PFÜTZNER (Austria). C.BENGTSSON (Sweden). On design problems of transformer cores resulting from the application of high grade stress coated SiFe-sheets
300-5 R. SCHULZ. N. ALEXANDROV. R. ROBERGE(Canada). Distribution transformers materials limi tations applicabi lity of amorphous magnetic core materials
300-6 O.P. CHABRA (lndia). Magnetic slot wedges for electrical machines

2.LATEST DEVELOPMENTS AND IMPROVEM ENTS OF INSULATING MATERIALS

Section 4 - Gaz insulated systems

400-0 G. LUXA. Rapport Spécial / Specia/ Report
400-1 J. MUDRA (Czechoslovakia.) Influence of corona· discharge action on electro-insulating propertiesof the SF6 + N2 gas mixture
400-2 R. SCHMID, W. ZAENGL (Switzerland). Investiga tions to the use of the insulation gas -mixture 50 % 1.2-C2Cl2F4 / 50 % SF6 in metal -enclosed me dium-voltage switchgear
400-3 M. ZWICKY. W ZAENGL (Switz erland), Investiga tions related to the dielectric strength of SF6 in the frequency range of 30-200 Hz with respect to on-site testing of GIS
400-4 J.M. BRAUN, LA GONZALEZ. FY CHU (Canada).A model of moisture ingress and distributi on in gas insulated switchgear
400-5 G.C. STONE, S.A. BOGGS, J.M. BRAUN , M.KURTZ (Canada), Reliability of epoxy components in high voltage switchgear
400-6 H. LATOUR-SLOWIKOWSKA. S. JANKOW ICZ, S.SLOWIKOWSKI. J.LAMPE (Poland), Sorne re marks on extrapolation of laboratory results of SF6 by-produc ts analysis to the application fo r the surveillan ce of GCB
400-7 F. HAMMER, J. W ELTGEN (Fed. Rep . of Germany), SF6-gas impregnated ail film dielectric with folded foil-edges for high voltage capacitors

Section 5 - Liquids and liquid-insulated system

500-0 A.H. COOKSON, Rapport Spécial / Special neport
500-1 S. SANKARA LINGAM, K.R. KRISHNASWAMY,(lndia), New dielectric liquids from vegetable origin - A feasibility study on lndian rape seed oil
500-2 V.N. NAGARAJA RAO , K. KUMAR. T.S. RAMU (lndia). On the assessment of insulating oils based on their gassing tendencies
500-3 A.S. PILLAI, DA DOSHI (lndia), Impulse break down characteristics of transformer oils used in lndia
500-4 E.D. SENKEVITCH, V.G. ARAKELIAN, TV GLA SUNOVA. VA LIPSHTEIN, T.I. MOROZOVA. N.M PANOVA (USSR), New synthe tic liquids for transformers
500-5 H.P. MOSER, V. DAHINDEN, E. SCHNEIDER. P. BRUPBACHER . H.HUMMEL, H. BRECHNA, F.ZÜGER (Switzerland), New results on agïng or aramid and cellulose pressboard under selective conditions
500-6 A. MARINHO Jr , E.G. SAMPAIO. M.M. MONTEIRO (Brazil), Castor oil as an insulating liquid
500-7 K.M .KAMA TH. T.S.R. MURTHY (lndia), Accelerated ageing studies on paraffinic and naphthenic based insulating oils using different inhibitors and passivators
500-8 Th. FACKLAM, D. KÔNIG . G. W IEGNER (Fed. Rep.of Germany ), The fluocarbon C2 Cl3 F3 as a boiling co.oling and insulation medium in traction inverters
500-9
W BREUER, G. HEGEMANN (Fed. Rep . of Germany), Behaviour of on-load tap changers in MIDEL 7131. A PCB-alte rnative for transformers

Section 6 - Solid insulating materials

6.1 : Latest developments

610-00 H.G. TEMPELAAR. Rapport Spéci al / Specia / Report
610-1 K. PLUESS. K. BRAN DENBERGER (Switzerland). A new cost- effective VPI-MI CA paper tape for global impregnation
610-2 K. BRANDENBERGER (Switzerl and ). An alysis of a Roebel bar insulation system after 14 years ser vice life in a generator
610-3 D. KÔN IG, H.J. HELLER. B. BAYER, P. WESTBROCK (Fed. Rep. of Germ any), Polyurethane hard foam insulation. Sorne fundamentals and relevant applica tions in high voltag e switchgear technology
610-4 J. HEIGHES, B. RIC HARD SON (United Kin gdom).Designing with modern polymerics
610-5 H.K. PAL. P.V BHAT (lndia). Slot discharge activity in high voltage machines using thermo setting insulation system
610-6 H.K. PAL. P.V. BHAT (lndia), Thermal endurance profile of an insulation system
610-7 G. DE TOURRE,IL J . LANTEIGNE. P. NGUYENDUY. P. BOURD ON (Canada). Performance of composite dielectric materials under high mecha nical stress
610-8 M. KAHLE. W. ROTH, K. HANELLA. P. FROSCH(German Dem. Rep.), PIO - A thermostable insula ting material system for high reaction technology
610-9 M. PARIS. N. RECROSIO (France). Caractérisation des isolants solides vis-à-vis de leur comporte ment au feu
610-10 J.J. SMIT. R. ROSS (The Netherlands). Manufactu ring influences on the HV-AC endurance of epoxy-resin insulation
610-11 G. LIPTAK. R. SCHULER (Switz erland). State of development of turn insulation for stator windings with form wound coils for high voltage rotating machines
610-12 H. GSODAM. G.PRAXL. W. SCHOBEL B. ZIMICS(Austria). Mechanism of the thermo-electrical long-tim e breakdown in epoxy-mica-insulation systems

6.2 : Electrical treeing and XLPE materials

620-0 M. SAURE. Rappo rt Spécial / Special Report
620-1 T.F.E. WALLA (Austria). About possible influences of the po lymer structure on water-tree growth
620-2 W. WEISSENBERG. P. KÜLLIG. W. MOSCH. M.EBERHARDT (Germ an Dem. Rep.), The influence of thermo-oxidated and deteriorated particles of polyethylene as macroscopic impe rfection and the lifetime curve at AC stress in PE/XLPE insu lated cables
620-3 Al LING TAN. J.H. MASON (Brazil), The resistance of a polymer concrete to weathering and tracking
620-4 J.C. FILIPPIN I, Y POGGI. V. RAHARIMALALA (France). J.J. DE BELLET. G. M ATEY (Switz er
land), A review of investigations on the relationship between mechanical propert ies. polymer morphology and water tree growth in different polymers
620-5 M. BEYER. F. M ERSCHEL (Fed. Rep. of Germany),Generation and proving of water treeing in EPR-spec imens under laboratory conditions
620-6 P FISCHER. E.F. PESCHKE. R.G. SCHROTH (Fed.Rep . of Germany), A.A. FARKAS (Sweden). Deve lopment and reali zation of watertree retardant XLPE compounds and cables
620-7 O. BÔTIGER. W GÔLZ. M . SAURE (Fed. Rep of Germany). Water tree theory and progress in XLPE-materials
620-8 K. MARTON (Czechoslovakia). Contribution of electric forces to the development of elect ric treeing etfects
620-9 E.F STENNIS, A.M.F.J ud. LAAR (netherlands) ageing of extruded cables in water
620-10 M.SAURE, W. KALKNER, on water tree testing of materials status report of cigre TF 15.06.0

3. LATEST DEVELOPMENTS OF METHODS FOR THE SURVEILLANCE OF ELECTRICAL APPARATUS IN HIGH VOLTAGE POWER NETWORKS

Section 7 - Partial discharge measurements

700-0 F.H. KREUGER, Rapport Special / Special Report
700-1 W.S. ZAENGL, A. KLAUS (Switzerland). On-site surveillance of potential transformers by means of PD-measurements
700-2 J. ZALEWSKI, J. SKUBIS (Poland). The evaluation of partial discharges appearing in power electrical equipment by the accoust ic emission method
700-3 E. BINDER (Austria), Techniques of partial di scharge measurements for stator windings of generators
700-4 S.A. BOGGS. D.D. PECENA, S. RIZZETTO, G.C.STONE (Canada), Limits to partial discharge detection - Effects of sample and defect geome try
700-5 F.H. KREUGER, W.A. SONNEV ELD, R.J. VANAALST (The Netherlands). Three phase detection
700-6 DA HILDER (United Kingdom) . Partial discharge measurement and other insulation monitoring techniques in harsh electrical environments
700-7 M.BURGMANN G. ISSEL R. TZSCHEUTSCHLER (German Dem.rep) Partial discharges in oil paper insulation of testing transformers

Section 8 - Dissolved gas analysis and other methods

8.1 : Dissolved gas analysis

810-0 H. FOSCHUM . Rapport Spécial / Special Report
810-1 G. MORAW (Austria). ExperienGe wit h dissolved gas analysis for high power converter transformers
810-2 O. KERENYI. Z. RABEL (Hungar,y) A simplified method of dissolved gas analysis for the surveillance of voltage transformers in high voltage power networks
810-3 A. WICHMANN. Ch. LOHSE (Fed. Rep . of Germany). Possibilities and limits of local overheating detection in generators by dissolved gas analysis
810-4 J. BREDE. H.J. RINDF LEISCH. J. SCHM IDT (German Dem. Rep.). Combined applicat ion of radiation chemical and gas analytical methods on transformer oil

8.2 : Other methods

820-0 W LAMPE. Rappo rt Spécial / Special Report
820-1 M. KHALIFA. S.E.D. HABIB. A. EL-MO RSHEDY. O.GOUDA (Egypt) . An intelligent monitor for exter nal insulation of high voltage power networks
820-2 J. KEDZIA. E. BRZOSTEK (Poland, )Electrostatic properties of transformer oil as a measure of its aging
820-3 J.L. KIRTLEY JR.. J.C. LAVALLE. D.J. McCARTHY (United States). Acoustic monitoring of transfor mer structures
820-4 M. KAHLE. E. NEUD ERT. K. WA LLI, R. EITNER. D.NEITZ (German Dem. Rep. ), A diagnost ic system for ageing studies on base of acoust ical em ission analysis
820-5 R. GOFFAUX (Belgique). Bases théoriques de l'instrumentation TESTACEC dest inée au diagnostic de l'isolation HT de machines à courant alternatif
820-6 M.C. ZARETSKY. J.R. MELCHER. C.M. COOKE(United States). On line monitoring of moisture in transformer oil using microdielectrometry

4.QUALITY ASSURANCE AND SURVEILLANCE OF ELECTRIC AL APPARATUS IN HIGH VOLTAGE SYSTEMS

Section 9 - Quality assurance

900-0 G. ST-ONGE. Rapport Spécial / Specia/ Report
900-1 G. THEIL (Austria), Indices and confidence limits for the reliabi lity evaluation of high voltage trans mission system components
900-2 M.B. SRIN IVAS. T.S. RAMU (lndia). Monte-Carlo approach to ageing data acquisition and ·analysis of apparatus insulation
900-3 H.T TEICHMANN (IEC - Switzerland). International standardization in the field of liquid dielectrics
900-4 N.P. ALEKSANDR OVA, A.K. MANN (USSR). lnsulation ageing regularities and service life fore casts for power capacitors
900-5 C. -LAMARRE. J.P. CRINE. H . ST-ONGE (Canada). Antioxidant functionality in liquid and solid dielec tric materials
900-6 S. HOFER (Austria). Ouality assuranc e of power transformers
900-7 P.G AGASHE and VIMALA SITARAMAN (India) Thermo analytical techniques in evaluation of insulating materials

Section 10 - Surveillance

10.1 : Surveillance of network voltage

1010-00 Special Report
1010-01.E. JAMES. F.E. TRICK. B.T. PHUNG. PAWHITE (Australia). A microprocessor based system for the electrical location of partial discharges : example of application to a large transformer winding
1010-02 F. REISINGER. M . MUHR. H. SCHENNER (Austria). A. DIESSNER (Fed. Rep. of Germany ), Field measuremerits of fast transient voltages in the 420 kV-GIS Wien Sued
1010-03 N. FUJIMOTO. S.A. BOGGS. G.C. STONE (Canada). Mechanisms and analysis of short rise time GIS transients
1010-04 J. ROGUIN (France). Determination des contraintes transitoires dans un poste THT
1010-05 E. GOCKENBACH (Switzerland). A new measuring device for transient overvoltages in transmission lines
1010-06 G. ALDROVAND I. C. CARUBEL LI. G. FURIOLI (ltaly). Z. AQUINO. U GAVIDIA. M. MILLAN (Venezuela). Measurements of switching transients during the field tests performed for the commissioning of the EDELCA 765 kV system

10.2 : Surveillance of high voltage apparatus

1020-00 C.DUBANTON. Rapport Spécial. Special Report
1020-01 J. SAIY (Iran). Multiple explosions of current transform ers due to poor quality of materials used and inadequate acceptance tests
1020-02 E.LEMKE. R. RÔDING . W. WEISSENBERG (German Dem. Rep .), On-site testing of extruded power cables by PD m easurements at SI volta ges
1020-03 A.WICHM ANN. P. GRUENEW ALD. J. WEIDNER(Fed. Rep. of Germany). Early fault detection in electrical machines by on-line RF monitoring
1020-04 A.MORETII. C. NADALI. E. SERENA (ltaly).Evaluation of insulation condition in high voltage current transformers
1020-05 A.KELEN (Sweden). Diagnostics of HV machine insulation From inspection to continuous monitoring
1020-06 R. M AGU. REANU . D. STANCIU. O. MUSTATA. C.MARIN (Ruman ia). M onitoring and diagnosis of large power electrical transformers '
1020-07 E.KEIL (A ustria ). AC investigations of the insulation of HV equipment in theory and practice
1020-08 M.DOMUN.G. CORNFIELD. A. HADFIELD(United Kingdom) Prediction of remaining lives of 132 kV grid transformers