Electricity: electrical systems and devices – Safety and protection of systems and devices – Superconductor protective circuits
Reexamination Certificate
2008-05-20
2008-05-20
Berman, Jack I. (Department: 2881)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Superconductor protective circuits
C361S021000, C505S850000, C505S883000, C505S885000, C505S875000
Reexamination Certificate
active
07375933
ABSTRACT:
In accordance with the present invention, modular corona shields are employed in a HTS device to reduce the electric field surrounding the HTS device. In a exemplary embodiment a fault current limiter module in the insulation region of a cryogenic cooling system has at least one fault current limiter set which employs a first corona shield disposed along the top portion of the fault current limiter set and is electrically coupled to the fault current limiter set. A second corona shield is disposed along the bottom portion of the fault current limiter set and is electrically coupled to the fault current limiter set. An insulation barrier is disposed within the insulation region along at least one side of the fault current limiter set. The first corona shield and the second corona shield act together to reduce the electric field surrounding the fault limiter set when voltage is applied to the fault limiter set.
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P.E. Frayssines, O. Lesaint, N. Bonifaci, A. Denat, F. Devaux, “Prebreakdown and Breakdown Phenomena Under Uniform Field in Liquid Nitrogen, and Comparison with Mineral Oil”, IEEE Trans. on Dielectrics and Electrical Insulation., vol. 10, n 6, pp. 970-976, 2003.
Berman Jack I.
Maskell Michael
Rideout, Jr. George L.
Superpower, Inc.
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