High voltage electrical apparatus

Details High voltage electrical apparatus High voltage electrical apparatus

H - Electricity

01

B

337/134, 31/165

H01B 3/44 (2006.01) H01B 3/00 (2006.01)

Patent

CA 1208000

ABSTRACT Electrical apparatus in which a heat-shrunk body of insulating material is subjected to an electrical stress along its surface of at least 104 V/m is distinguished in that the body comprises particulate calcium carbonate dispersed as the only substantial filler in a compatible thermoplastic or elastomeric matrix based on a carbon-chain polymer. Surprisingly this inexpensive white and apparently inert filler is capable of providing compositions that have a failure voltage (according to the tracking resistance test set out in ASTM specification D-2303) of 3.0 kV and above.

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