Circuit breaker having an encapsulated auxiliary coil assembly
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United States of America Patent
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Jul 2, 2002
Grant Date -
N/A
app pub date -
Nov 21, 2000
filing date -
Nov 21, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circuit breaker which has an auxiliary coil fitted onto the primary bobbin adjacent the pole piece having a dielectric auxiliary bobbin and a dielectric bobbin housing encapsulating the auxiliary coil and forming an encapsulated auxiliary coil assembly. Both the dielectric auxiliary bobbin and the dielectric bobbin housing are comprised of a polymeric material, preferably a liquid-crystal polymer. Preferably, the liquid-crystal polymer is an aromatic liquid-crystal polyester which is reinforced with about 30% glass and has a nematic liquid-crystal structure. Furthermore, it is preferred for the dielectric strength of the liquid-crystal polymer to be about 32 KV/mm to about 35 KV/mm.
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