| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Sauers, Isidor
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Topics
Publications (21/21 displayed)
- 2012Effect of polymer–nanoparticle interactions on the glass transition dynamics and the conductivity mechanism in polyurethane titanium dioxide nanocompositescitations
- 2012Colloidal synthesis of BaF2 nanoparticles and their application as fillers in polymer nanocompositescitations
- 2012Epoxy nanodielectrics fabricated with in situ and ex situ techniquescitations
- 2010ELECTRICAL AND MECHANICAL PROPERTIES OF TITANIUM DIOXIDE NANOPARTICLE FILLED EPOXY RESIN COMPOSITEScitations
- 2010Properties of a nanodielectric cryogenic resincitations
- 2010Electrical properties of a thermoplastic polyurethane filled with titanium dioxide nanoparticles
- 2010DIELECTRIC PROPERTIES OF VARIOUS NANOCOMPOSITE MATERIALS
- 2010VERY LOW FREQUENCY BREAKDOWN PROPERTIES OF ELECTRICAL INSULATION MATERIALS AT CRYOGENIC TEMPERATUREScitations
- 2010Breakdown properties of epoxy nanodielectriccitations
- 2010Physical properties of epoxy resin/titanium dioxide nanocompositescitations
- 2009Polyamide 66 as a cryogenic dielectriccitations
- 2009Nanocomposite Insulation for HTS Applicationscitations
- 2009Very low frequency breakdown strengths of electrical insulation materials at cryogenic temperaturescitations
- 2009Electrical Insulation Characteristics of Glass Fiber Reinforced Resinscitations
- 2009Electrical properties of a polymeric nanocomposite with in-situ synthesized nanoparticlescitations
- 2008Nanodielectric system for cryogenic applications: Barium titanate filled polyvinyl alcoholcitations
- 2008Cobalt iron-oxide nanoparticle modified poly(methyl methacrylate) nanodielectricscitations
- 2007Enhancement of dielectric strength in nanocompositescitations
- 2007Dielectric properties of polyvinyl alcohol filled with nanometer size barium titanate particlescitations
- 2007Breakdown and Partial Discharge Measurements of Some Commonly Used Dielectric Materials in Liquid Nitrogen for HTS Applicationscitations
- 2006Electrical properties of epoxy resin based nano-compositescitations
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document
Very low frequency breakdown strengths of electrical insulation materials at cryogenic temperatures
Abstract
For long cables or equipment with large capacitance it is not always possible to conduct high voltage withstand tests at 60 Hz due to limitations in charging currents of the power supply. Very low frequency (typically at a frequency of 0.1 Hz) has been used for conventional cables as a way of getting around the charging current limitation. For superconducting grid applications the same issues apply. However there is very little data at cryogenic temperatures on how materials perform at low frequency compared to 60 Hz and whether higher voltages should be applied when performing a high voltage acceptability test. Various materials including G10 (fiberglass reinforced plastic or FRP), kapton (commonly used polyimide), polycarbonate, and polyetherimide, and in liquid nitrogen alone have been tested using a step method for frequencies of 60 Hz, 0.1 Hz, and dc. The dwell time at each step was chosen so that the voltage stress time would be the same in both the 60 Hz and 0.1 Hz tests. The data indicated that, while there is a small frequency dependence for liquid nitrogen, there are significant differences for the solid materials studied.