H - Electricity – 02 – H
Patent
H - Electricity
02
H
317/3
H02H 7/00 (2006.01) B05B 5/10 (2006.01)
Patent
CA 1199962
ABSTRACT OF THE DISCLOSURE An improved control circuit for protecting a high voltage DC electrostatic system from arcing by removing the high voltage from the electrostatic system under incipient arcing conditions. A signal having a voltage proportional to the instantaneous high voltage current in the electrostatic system is established. DC components and unwanted noise and unwanted AC components are removed from the signal to leave only signal components relating to the rate of change of the current in the high voltage system and information indicative of incipient arcing conditions. When the remaining signal exceeds a pre- determined reference level, high voltage is removed from the electrostatic system.
419620
Moser Richard A.
Schaffer J. Thomas
Weinstein Richard
Abb Flexible Automation Inc.
Fetherstonhaugh & Co.
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