TY - JOUR
T1 - High-Voltage Superconducting Fault Current Limiters Based on High-Diffusivity Dielectric Substrates
AU - Deutscher, Guy
N1 - Publisher Copyright:
© 2018, The Author(s).
PY - 2018/7/1
Y1 - 2018/7/1
N2 - High-temperature superconducting (HTS) tapes currently used for the manufacture of resistive fault current limiters use metallic substrates upon which the HTS film is grown. Because the alloys used for these substrates, such as Hastelloy, have a rather high resistivity and low thermal conductivity, the HTS film must be protected by a more conducting metallic layer acting as a shunt to avoid burn out during a fault. This shunt layer limits severely the electric field generated during the fault to values smaller than 100 V/m. A long length of tape is then necessary to achieve the desired high voltage. We show here that by using a high thermal diffusivity dielectric substrate such as sapphire, it is possible to obtain much higher electric fields of up to several kilovolts per meter.
AB - High-temperature superconducting (HTS) tapes currently used for the manufacture of resistive fault current limiters use metallic substrates upon which the HTS film is grown. Because the alloys used for these substrates, such as Hastelloy, have a rather high resistivity and low thermal conductivity, the HTS film must be protected by a more conducting metallic layer acting as a shunt to avoid burn out during a fault. This shunt layer limits severely the electric field generated during the fault to values smaller than 100 V/m. A long length of tape is then necessary to achieve the desired high voltage. We show here that by using a high thermal diffusivity dielectric substrate such as sapphire, it is possible to obtain much higher electric fields of up to several kilovolts per meter.
KW - Dielectric substrate
KW - Fault current limiter
KW - High temperature superconductor
KW - Sapphire EFG ribbon
KW - Thermal diffusivity
UR - http://www.scopus.com/inward/record.url?scp=85045153472&partnerID=8YFLogxK
U2 - 10.1007/s10948-018-4633-8
DO - 10.1007/s10948-018-4633-8
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AN - SCOPUS:85045153472
SN - 1557-1939
VL - 31
SP - 1961
EP - 1963
JO - Journal of Superconductivity and Novel Magnetism
JF - Journal of Superconductivity and Novel Magnetism
IS - 7
ER -