2013 IEEE Electrical Insulation

Conference

(EIC 2013)

Ottawa, Ontario, Canada

2-5 June 2013

IEEE IEEE Catalog Number: CFP13EEI-PRT

ISBN: 978-1-4673-4738-9

Table of Contents

Sunday, 2 June 2013

Reception and Poster Sessions 18:00 - 21:00 Victoria

Rotating Machines #1 (SI)Chair: Melanie Levesque, Hydro-Quebec

#10 End-winding vibration monitoring: Pivotal in preventing major damage 1

on a large turbo-generator

A. Tetreault, VibroSystM Inc., Z. Zhengping, CNNC Jiangsu Nuclear Power

Corporation, Canada

#112 Experience with DC Polarization-Depolarization Measurements on 7

Stator Winding Insulation

G.C. Stone, M. Sasic, Iris Power - Qualitrol, Canada

#13 Adapting the VibroFibre Sensor Structure to Monitor and Diagnose PD 11

and Vibration Sparking in Large Generator

P. Kung, L. Wang, S. Pan, QPS Photronics Inc, M.I. Comanici, McGill

University, Canada

Materials #1 (S2)Chair: Enis Tuncer, GE Global Research

#59 Modelling of the transient transport of electrons in dielectrics for 16

one-carrier pulsed injection

N. Meftali, S. Bouazabia, Laboratory of Electrical and Industrial Systems,

Algeria

#111 Epoxy composites with glass bubbles for electrical application, J. Chen, 20

A. Krivda

F. Greuter, D. Meng, Y. Feng, N. Li, J. Rocks, ABB Corporate Research, China

#130 Dielectric Properties of Epoxy/BN Micro- and Mesocomposites: 25

Dielectric Response at Low and High Electrical Field Strengths

T. F. Heid, C. Vanga, E. David, H. Couderc, Ecole de technologie superieure,

M. F. Frechette, Hydro-Quebec, N. Freebody, A.S. Vaughan, University of

Southampton, Canada

Transformers #1 (S3)Chair: Yves Bertrand, EDF

#43 Construction of Finite Impulse Wavelet Filter for Partial Discharge

Localisation inside a Transformer Winding

M.S. Abd Rahman, P. Rapisarda, P.L. Lewin, University of Southampton, UK

30

#173 Investigation of complex, in-homogenous insulation system with 35

multiple time constant by recovery voltage measurement (RVM)

C. V6r6s, B, Nemeth, Budapest University of Technology and Economics,

Hungary

#26 Influence of Temperature on Frequency Response Analysis of 40

Transformer Winding

M. Bagheri, B.T, Phung, T. Blackburn, University of New South Wales, A,

Naderian, Kinectrics, Australia

#154 Life curves for new and thermally aged oil impregnated insulation 45

L. Chmura, D.V.D. Boom, P.H.F. Morshuis, JJ. Smit, Delft University of

Technology, The Netherlands

#148 Influence of Water Content on the Electrical Properties of Insulating 49

Vegetable Oil-Based Nanofluids

B. Du, J. Li, B. Wang, J. Xiang, Chongqing University, Z. Zhang, Chongqing

Changshou Power Supply Bureau, China

Cables #1 (S4)Chair: Howard Sedding, Kinetrics

#60 Modelling of partial discharge pulses in high voltage cable insulation 52

using finite element analysis software

H.A. Illias, H.R. Yon, A.H.A. Bakar, H. Mokhlis, University of Malaya, G. Chen,

P.L. Lewin, University of Southampton, A.M. Ariffin, Universiti Tenaga

Nasional, Malaysia

#87 Power Cable Modeling for PD Pulse Propagation and Sensitivity 57

M. Wild, S. Tenbohlen, University of Stuttgart, E. Gulski, R. Jongen, onsite hv

technology AG, Germany

#7 Options for Cables Post Diagnostic Testing 61

W.J. Chatterton, J.G. Derezes, UtilX Corporation, USA

#20 Feasibility of Reduced Insulation Thickness in Medium Voltage Power 66

Cable Designs

P. Hyvonen, J. Kliiss, E. Saarijarvi, J. Millar, Aalto University, Finland

Outdoor Insulations #1 (S5)Chair: Shamsodin Taheri, Universite du Quebec a Chicoutimi

#56 Study on Lightning Protection of Shielding Failure for ±500kV DC

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#184 Acoustic Noise Evaluation for Overhead Line Conductors

Q. Li, R. Shuttleworth, G. Zhang, I. Dupere, and S.M. Rowland, The University

of Manchester, UK

119

Partial Discharges (S6)

Chair: Claude Hudon, Hydro-Quebec

#75 Estimation of Partial Discharge Inception Voltages Due to Voids in 124

Solid Sheet Insulation

M.U. Zuberi, A. Masood, E. Husain, A. Anwar, Aligarh Muslim University, India

#33 The Effectiveness Assessment of Calibration and Measurement of PD 129

Apparent Charge Quantity

J. Liu, Z. Zheng, H. Yu, North China Electric Power University, China

#23 Electromagnetic Induction in Human Body Inside High Voltage N/A

Substations

S.M. Ghania, Benha University- Cairo, M.M.A. Salama, Waterloo University,

Egypt

#179 Partial discharge characteristics of NYCY low voltage cables 138

R. CSELKO, M.M. Garcia, I. Berta, Budapest University of Technology and

Economics, Hungary

#69 Location of Partial Discharge Occurring in Ground, Coil of 142

Superconducting Maglev System under Noise Environment using Radio

Interferometer System

M. Kawada, The University of Tokushima, M. Suzuki, R. Ikeda, The RailwayTechnical Research Institute, Japan

#85 The Influence of External Magnetic Fields on the Partial Discharge 147

Characteristics of Voids

A.J. Reid, D.M. Hepburn and B.G. Stewart, Glasgow Caledonian University, UK

#140 Method of Controlling Corona Effects and Breakdown Voltage of Small N/A

Air Gaps Stressed by Impulse Voltages

A. Maglaras, K. Giannakopoulou, T.E.I, of Larissa, T. Kousiouris, F. Topalis,

N.T.U.A., D. Katsaros, L. Maglaras, University of Thessaly, Greece

Monday, 3 June 2013

Opening Remarks 08:15 - 08:30

Plenary Session 08:30 - 09:30 Victoria

Chair: Eric David, Ecole de technologie superieure

Upcoming challenges for power transformers and overview of CIGRE SC A2 activities

C. Rajotte, Hydro-Quebec, Canada

Coffee Break 09:30 - 10:00

Transformers #2: (S7) 10 :00 - 11:40 Victoria

Chair: Patrick Picher, Hydro-Quebec

#155 Reliability estimation for populations with limited and heavily 159

censored failure information

L. Chmura, P.H.F. Morshuis, E. Gulski, JJ. Smit, Delft University of

Technology, A. Janssen, Liander - The Network Operator, The Netherlands

#16 Diagnosis of On-Load Tap Changer (OLTC) Using Dynamic Resistance N/A

Measurement

M. Aizam Talib, N. Rahim, R. Arumugam, TNB Research Sdn Bhd, H.S.Gosal,

Arena Electrical Services Sdn Bhd, Malaysia.

#6 A Comparative Analysis of Performance of Well-known Methods for 168

Conforming Distribution of Impulsive Voltage Along Regulating Winding

P.A.P. de Lima, WEG Transmission & Distribution, S.H.L. Cabral, Fundacao

Universidade Regional de Blumenau, Brazil

#94 Validation of the Forensic Analysis Applied to Distribution 173

Transformers (FAADT)D. A. P. Ferreira, F. Nakagawa, R. A. C. Altafim, University of Sao Paulo, J. F.

R. da Silva, Elektro, R.A.P. Altafim, Federal University of Parafba, Brazil

#1 Health Index: the TERNA's Practical Approach for Transformers Fleet 178

Management

F. Scatiggio, TERNA RETE ITALIA SpA, M. Pompili, Universita Sapienza, Italy

Rotating Machines #2 (S8) 10:00 - 11:40 AlgonquinChair: Greg Stone, Iris Power

#129 Effect of Electrical and Thermo-Mechanical Stresses on the Surge 183

Capability of MV Form-wound AC Stator Coils

R. Omranipour, S. Haq, GE Power Conversion, Canada

#164 Analysis of times-to-failure of various turn insulations of form-wound 187

coils under PWM voltage waveform

M. Saleh Moonesan, S. Jayaram, E. Cherney, University of Waterloo, R.

Omranipour, S. Haq, GE Power Conversion, Canada

#32 Determination of Stator Temperature Profile using Distributed 191

Sensing

C. Hudon, M. Levesque, J. Picard, Hydro-Quebec, L. Zou, OzOptics Ltd.,

Canada

Mica Tape and VPI Resin Insulation System Options for Medium Voltage

#153 Applications

N. Frost, Krempel, M. Winkeler, S. Tuckwell, PDG, USA

196

Outdoor Insulations and Switchgears #2 (S9) 10:00 - 11:40 Champlain

Chair: Masoud Farzaneh, Universite du Quebec a Chicoutimi

#2 An optimal surge arrester for EHV air insulated stations utilizing 201

high-gradient MO resistors

L. Stenstrom, J. Taylor, H. Westerlund, ABB, Sweden

#9 Automatic Inspection of Outdoor Insulators using Image Processing 206

and Intelligent Techniques

L. Khalayli, H. Al Sagban, H. Shoman, K. Assaleh, A. El-Hag., American

University of Sharjah, United Arab Emirates

#30 Electric field analysis of 132kV EPDM insulator and correlation with 210

ageing features

A. Tzimas, C. Zachariades, S M. Rowland, The University of Manchester, UK

#105 Measurement System for Very Fast Transients in Gas Insulated 215

Switchgear

S. Burow, W. Kohler, S. Tenbohlen, Universitat Stuttgart, U. Straumann, ABB

Switzerland Ltd., Germany

Lunch in Exhibits 11:40 - 14:00 Delta meeting room

Transformers #3 : (S10) 14:00 - 17:00 Victoria

Chair: Ali Naderian, Kinectrics

#93 Experience with the Frequency Response Analysis (FRA) for the 220

Mechanical Condition Assessment of Transformer Windings

P. Picher, C. Tardif, C. Rajotte, Hydro-Quebec, Canada (Keynote)

#25 Shunt Capacitance Influences on Single Phase Transformer FRA 225

Spectrum

M. Bagheri, B.T. Phung, T. Blackburn, University of New South Wales, A.

Naderian, Kinectrics, Australia

#103 Continuous Monitoring of Power Transformer Solid Insulation Dry-out 230

Process - Application of Dielectric Frequency Response

D.M. Robalino, Megger North America, P. Werelius, Megger Sweden, USA

#161 Effects of Voltages with High-Frequency Contents on the Transformer 235

Insulation PropertiesM. Khanali, S. Jayaram, University of Waterloo, J. Cheng, Moloney Electric

Inc., Canada

#144 Pole Mounted Distribution Transformers Insulation Condition 239

Assessment

B. Noirhomme, S. Hachichi, J. Jalbert, M.-C. Lessard, F. Brochu, Hydro-

Quebec, Canada

Rotating Machines #3 (Sll) 14:00 - 17:00 AlgonquinChair: David Malec, Universite Paul Sabatier

#41 Magnetic Wedge Failures in Wind Turbine Generators 244

K. Alewine, Shermco Industries, C. Wilson, Insulation Integrity, Inc. / Siemens

Industry, USA

#176 Study of thermo-mechanical aging and constant temperature aging of 248

stator bars

H. Provencher, C. Hudon, Hydro-Quebec, E. David, Ecole de Technologie

Superieure, Canada

#185 Insulation Performance Evaluation of High Temperature Wire 253

Candidates for Aerospace Electrical Machine Winding ApplicationL. Fang, I. Cotton Z.J. Wang, R. Freer, University of Manchester, UK

#118 Motor & Generator High Voltage AC Testing 257

M.T. Peschel, High Voltage, Inc., USA

#139 Tailoring of the Electrical Properties of Silicon Carbide for Field 263

Grading Application

C. Vanga-Bouanga, T.F. Heid, E. David Ecole de technologie superieure, M. F.

Frechette, S. Savoie, Hydro-Quebec, Canada

Materials #2: Nano-materials (S12) 14:00 - 17:00 ChamplainChair: Edward Cherney, University of Waterloo

#167 Evaluation of Partial Discharge Resistance of Polypropylene/Clay 267

Na nocomposites

A.B. Poda, P. Basappa, Norfolk State University ,USA

#157 Effect of filler concentration on dielectric properties of RTV silicone 272

rubber / T1O2 nanocomposite

F. Madidi, G. Momen, M. Farzaneh, Universite du Quebec a Chicoutimi, Canada

#134 Dielectric response of polyethylene modified with nanosilica 276

M.F. Frechette, S. Savoie. Hydro-Quebec, M. Guo, T. Heid, E. David, Ecole de

technologie superieure, S. Sutton, SJ. Han, The Dow Chemical Company,

Canada

#192 Analyses of Surface Degradation of Nano-filled Polypropylene Films 281

through Partial Discharges & Surface Study

A.B. Poda, P. Basappa, C.S. Fritzel, Norfolk State University, USA

#159 Dielectric Properties of Epoxy Resins with Oxide Nanofillers and their 286

Accelerated Ageing

M. Klampar, M. Spohner, K. Liedermann, J. Kobrtek, Brno University of

Technology, Czech Republic

#169 Dielectric Properties of PA6 - Montmorillonite Nanocomposites under 291

Moderate Electric Field

H. Couderc, E. David, Ecole de Technologie Superieure, M. Frechette, S.

Savoie, Hydro-Quebec, Canada

Tuesday, 4 June 2013

Transformers #4 (S13) 08:30 - 11:30 Victoria

Chair: Mohamed Ryadi, EDF

#109 The Influence of Corona Near to the Bushing of a Transformer on 295

Partial Discharge Measurement with an Acoustic Emission Sensor

S.A. Mahmood Najafi, A. Peimankar, H. Saadati, E. Gockenbach, H. Borsi,

Leibniz Universitat Hannover, Germany

#158 Electric Stress Grading on Bushings of Combined Instrument 299

Transformers Using High Permittivity Polymeric CompositesM. Paredes-Olgum, C. Gomez-Yanez, F. P. Espino Cortes, National Polytechnic

Institute, E. Ramirez, Arteche Technology and Transformers, Mexico

#40 Experiences in Testing of AC and DC Bushings 304

W. Lick, Graz University of Technology, Austria

#152 The Gassing Tendency of Oil under Corona Discharge 308

M. Ghalkhani, I. Fofana, H. Hemmatjou, Universite du Quebec a Chicoutimi,

Canada

#65 Electrical Conductivity Measurement and Determination of Ion 313

Mobility in Insulating Oil

F. Vahidi, M. Jovalekic, S. Tenbohlen University of Stuttgart, M. Rosner, C.

Perrier, H. Fink, Alstom grid, Germany

#14 Adapting the FBG Cavity Fibre Sensor Structure to Monitor and 318

Diagnose PD in Large Power Transformer

P. Kung, L. Wang, S. Pan, QPS Photronics, M.I. Comanici, McGill University,

Canada

Rotating Machines #4 (S14) 08:30 - 11:30 AlgonquinChair: Gian Carlo Montanari, Universita di Bologna

#108 Partial Discharge Testing on Air-Cooled Generators in Marine

Environments

V. Warren, Iris Power - Qualitrol, Canada (Keynote)

323

#104 Using non-intrusive sensors to detect partial discharges in a PWM 329

inverter environment: a twisted pair example

T. Billard, F. Fresnet, M. Makarov, Renault Technocentre, T. Lebey, P. Castelan,

P. Bidan, S. Dinculescu, Laplace, CNRS-UPS-INP, France

#47 Identification of PD Defect Typologies Using a Support Vector 333

Machine

P. L. Lewin, J. A. Hunter, University of Southampton, L. Hao, GE Global

Research, A. Contin, University of Trieste, UK

#106 Theoretical Consideration and Numerical Simulation regarding TDR 337

on Rotor Windings

C. Staubach, Siemens AG Energy Sector, D. Kokoschka, TU Dortmund,

Germany

#66 Inspection of Ground-Wall Insulation for ac Rotating Machines using 342

X-Ray Tomography

A.Contin, G.Schena, D.I.A. University of Trieste, G.L.Stanic, G.Peruzzi, Marelli

Motori s.p.a., Italy

Outdoor Insulations #3 (S15) 08:30 - 11:30 ChamplainChair: Prathap Basappa, Norfolk State University

#52 Numerical Analysis of the Combined Effects of Booster Sheds and 346

Grading Rings on an Ice-Covered EHV Ceramic Post Insulator

S. M. Ale-Emran, M. Farzaneh, Universite du Quebec a Chicoutimi, Canada

#90 Spatial-temporal Investigation of Breakdown of Long Air Gaps by 351

Lightning Voltages up to 2.4MV

A. Shirvani, W. Schufft, Chemnitz University of Technology, H.-P. Pampel , U.

Schmidt, Dresden University of Technology, Germany

Comparative Inclined Plane Tests on Silicone and EPDM Elastomers 356

under DC

R.A. Ghunem, S.H. Jayaram, E.A. Cherney, University of Waterloo, Canada

A New Single-Arc AC Dynamic FEM Model of Arc Propagation on Ice 360

Surfaces

M. Jabbari, C. Volat, M. Farzaneh, Universite du Quebec a Chicoutimi, Canada

#187 Contact-less optical sensors for in situ AC and DC electric field 365

measurement and diagnostics

L. Duvillaret, G. Gaborit, C. Volat, F. Lecoche, J. Dahdah, France

#163

#188

#17 Optimization of Corona Ring Design for a 400KV Non-Ceramic 370

Insulator

E. Al Murawwi, TRANSCO, A. Mohammed, Z. Alip, The Petroleum Institution, A.

El-Hag, American University of Sharjah, United Arab Emirates

Lunch in Exhibits 11:30 - 14:00 Delta meeting room

Transformers #5 (S16) 14:00 - 17:00 Victoria

Chair: Christopher Krause, Weidmann

#48 Low Viscosity Insulating Liquid based on Natural Esters for 374

Distribution Transformers

Y. Bertrand, EDF, P. Lauzevis, ERDF, France

#36 The Electrostatic Charging Tendency of some Environmentally 378

Friendly Insulating Fluids

M. Talhi, S. Flazi, University of Sciences and Technology of Oran, I. Fofana,

Universite du Quebec a Chicoutimi, Algeria

#146 Electrical properties of natural oils and methyl esters of their 383

constitutive fatty acids

M. Spohner, M. Klampar, K. Liedermann, Brno University of Technology, Czech

Republic

#177 Methanol marker for the thermal performance qualification of power 387

transformers

M. Ryadi, A. Tanguy, EDF J. Jalbert, Hydro-Quebec, France

#143 Influence of Transformer Oil Acidity on Insulating Paper Degradation 392

B. Noirhomme, M.-C. Lessard, J. Jalbert, S. Besner, F. Brochu, E. Dupuis,

Hydro-Quebec, Canada

Outdoor Insulations #4 (S17) 14:00 - 17:00 AlgonquinChair: Ayman El-Hag, American University of Sharjah,

#42 Real-time Monitoring of Leakage Current on Insulating Cross-arms in 397

Relation to Local Weather Conditions

C. Zachariades, S. M. Rowland, I. Cotton, The University of Manchester, UK

v

#170 Experience with Electrical Testing of Aerial Devices for Use at 69 - 402

500 kV

W. McDermid, Manitoba Hydro, Canada

#12 Electrical Degradation of 15 kV Composite Insulator under 404

Accelerated Aging Conditions

R.Tripathi, S. Grzybowski, Mississippi State University, R. Ward, Aluma-Form

Inc, USA

#189 Comparison Between the Use of Surface and Volume Conductivity to 409

Compute Potential Distribution along an Insulator in Presence of a Thin

Conductive Layer

C. Volat, University of Quebec at Chicoutimi, Canada

#131 Equivalent Surface Conductivity of an Ice-covered Insulator During 414

DC Flashover

S. Taheri, M. Farzaneh and I. Fofana, Universite du Quebec a Chicoutimi,

Canada

#19 Evaluation of CFO for Medium Voltage Insulators Submitted to 419

Non-standard Impulse Shapes

G.P. Lopes, J.A.D. Pedroso, M.L.B. Martinez, Federal University of Itajuba,

Brazil

Materials #3 (S18) 14:00 - 17:00 ChamplainChair: Michel Frechette, Hydro-Quebec

#39 Dielectric Performance of Nanocomposites Synthesized by 424

Poly(ethylene oxide)-like Film Coated Silica Nanoparticles by Plasma

Polymerization

W. Yan, B.T. Phung, University of New South Wales, Z.J. Han, K. Ostrikov,

Plasma Nanoscience Centre Australia (PIMCA), Australia

#162 Electrical testing of high voltage insulators reinforced with nano 429

particles and its fractal analysis

I.R. Vazquez, Mexico

#74 Comparison Of Standards Requirements For Clearances in Aerospace 434

Systems

V. Peesapati, L. Fang, R. Giussani, I. Cotton, The University of Manchester, UK

#97 Damping of VFTO by RF Resonator and Nanocrystalline Materials 439

S. Burow, W. Kohler, S. Tenbohlen, University of Stuttgart, U. Straumann, ABB

Switzerland Ltd., Germany

#120 Characterization of UHMWPE/POSS Composite Prepared by Ball 444

MillingM. Guo, E. David, H. Couderc, C. Vanga Bouanga, N.R. Demarquette, Ecole de

technologie superieure, M.F. Frechette S. Savoie, Hydro-Quebec, Canada

Wednesday, 5 June 2013

Transformers #6 (S19) 08:30 - 11:30 Victoria

Chair: Marie-Claude Lessard, Hydro-Quebec

#51 Identification of Overheating in Transformer Solid Insulation by 449

Polarization Depolarization Current Analysis

S.A. Bhumiwat, Consultant, New Zealand

#81 DGA: reference values from Power Transformers in Spain N/A

D. Urquiza, CEIS, B. Garcia, J.C. Burgos, J.L. Pi'rez, Universidad Carlos III de

Madrid, Spain

#50 Impact of Corrosive Sulphur in Transformer Insulation Paper 459

P.S. Amaro, A. F. Holt, M. Facciotti, J.P. Pilgrim, P.L. Lewin, R.C.D. Brown,

University of Southampton, G. Wilson, P. Jarman, National Grid, UK

#49 Ageing Diagnosis of MV/LV Distribution Transformers via Chemical 464

Indicators in Oil

D. Laurichesse, Y. Bertrand, C. Tran-Duy, V. Murin, EDF

#128 An Initial Study into Silver Corrosion in Transformer Following oil 469

Reclamation

A.F. Holt, M. Facciotti, P. Amaro, R. C. D. Brown, P.L. Lewin, J. A. Pilgrim,

University of Southampton, G. Wilson and P. Jarman, National Grid, UK

Rotating machines #5 (S20) 08:30 - 11:30 Lachine

Chair: Ramtin Omranipour, GE

#121 Development of a Generator Prognostic Tool 473

N. Amyot, C. Hudon, M. Levesque, M. Belec, F. Brabant, C. St-Louis, Hydro-

Quebec, Canada

#119 Consequences of Protection and Control Deficiencies 477

W. McDermid, B.G. Solomon, Manitoba Hydro, Canada

#18 Insulation Degradation Analysis of Stator Bars Subjected to Slot 479

Partial Discharges

M. Levesque, C. Hudon, Hydro-Quebec, E. David, Ecole de technologie

superieure de Montreal, Canada

#21 Forensic Analysis of Multiple Medium Voltage 3MW Self-Excited 484

Generators Following Field Testing

H.W Penrose, Dreisilker Electric Motors, Inc., USA

#98 Simulating Insulation Discharge Processes in the Laboratory 487

D.L. McKinnon, PdMA Corporation, H.W Penrose, Dreisilker Electric Motors,

Inc., N. Frost, Krempel Insulation Technologies, USA

#193 Incapability of Analog Relay Protection to Detect Generator Stator 490

Winding Ground Failures at Neutral End

C.V. Maughan, Maughan Generator Consultants, USA

Cables #2 (S21) 08:30 - 12:15 ChamplainChair: Jacques Cote, Hydro-Quebec

#122 Water Treeing in XLPE Insulation at a Combined DC and High 494

Frequency AC Stress

H.H. Sasternes, J. Aakervik, S. Hvidsten, SINTEF Energy Research, Norway

#88 Practical aspects of PD localization for long length Power Cables 499

M. Wild, S. Tenbohlen, University of Stuttgart, E. Gulski, R. Jongen, onsite hv

technology AG, F. de Vries, Liandon member of Alliander N.V., Germany

#180 Electrical condition monitoring techniques for low-voltage cables 504

used in nuclear power plants

L. Verardi, D. Fabiani, G.C. Montanari, Universita di Bologna, P. Zak, UJV Rez,

a. s., Italy

#142 Water Treeing in Subsea XLPE Cables with Thermal Gradient 509

S.M. Helles0, S. Hvidsten, SINTEF Energy Research, K.M. Furuheim, G.

Hakonseth, Nexans Norway, Norway

#79 Current Rating Methodology for Mass Impregnated HVDC Cables 513

Z.Y. Huang, J.A. Pilgrim, P.L. Lewin, S.G. Swingler, University of

Southampton, D. Payne, National Grid, UK

#31 DC utilization of existing LVAC distribution cables 518

D. Antoniou, A. Tzimas and S.M. Rowland, The University of Manchester, UK

#76 PD Test Procedure as after Laying Acceptance Test on HV and EHV 523

Polymeric Cable Systems

L. Fornasari, Techimp H.Q. SpA, G.C. Montanari, A. Cavallini, University of

Bologna, Italy