Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Patent
1994-08-03
1996-06-11
Gaffin, Jeffrey A.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
361 87, H02H 326
Patent
active
055262139
ABSTRACT:
A fast reacting ground fault interrupter circuit particularly suited for use with high current, high voltage DC pulses generated by transistor switched magnet pulsers driving pulsed electromagnets used with electromagnetic acoustic transducers (EMATs). Whenever a ground fault is detected, a digital shut off signal is sent to the transistor switched magnet pulser to shut it off and prevent transmission of the DC pulse. Additionally, the shut off signal is also provided to a DC current interrupter which shuts off power supplied to the transistor switched magnet pulser itself.
REFERENCES:
patent: 4955069 (1990-09-01), Ionescu
patent: 5224006 (1993-06-01), MacKenzie et al.
Henderson Karl C.
MacLauchlan Daniel T.
Edwards Robert J.
Gaffin Jeffrey A.
Marich Eric
Sherry Michael J.
The Babcock & Wilcox Company
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