Electricity: electrical systems and devices – Safety and protection of systems and devices – Load shunting by fault responsive means
Patent
1990-03-16
1992-08-04
Stephan, Steven L.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Load shunting by fault responsive means
361111, 361118, H02H 900
Patent
active
051364557
ABSTRACT:
A multi-stage electromagnetic interference suppression circuit is disclosed which utilizes a diverter network, an impedance network and a clamping network. The diverter network includes a series combination of a varistor and a three terminal gas arrester to suppress incoming transient energy in both normal and common propagation modes. The clamping network serves to suppress any transient energy overshoot which is not suppressed by the diverter stage. Radio frequency interference is filtered by X and Y capacitors forming LC filters with an inductance in the impedance network.
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"IEEE Guide for Surge Voltages in Low Voltage AC Power Circuits", IEEE Power Engineering Society, IEEE Std. 587-1980, Approved Dec. 19, 1979.
Berhane Adolf
ESP Electronic Systems Protection, Inc.
O'Brien Kevin F.
Stephan Steven L.
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