Apparatus and method of interrupting current for reductions in a

Details Apparatus and method of interrupting current for reductions in a Apparatus and method of interrupting current for reductions in a

1998-04-28

1999-08-03

Gaffin, Jeffrey

Electricity: electrical systems and devices

Safety and protection of systems and devices

Arc suppression at switching point

361 3, 361 13, H02H 722

Patent

active

059333049

ABSTRACT:
A current interrupter circuit includes a primary current path and a secondary current path in parallel with one another and provided between input and output terminals. At least one solid state switch, preferably a power MOSFET, are interposed along the secondary current path. At least one electromagnetic relay has relay contacts for engaging and disengaging the primary path from a power source and from the secondary path. A sequencing circuit provides a first control signal to turn on or maintain on the solid state switches prior to sending a second control signal to open/close the relay contacts, and further provides a third control signal to turn off the solid state switches shortly after the relay contacts are opened, whereby arcing of the contacts is prevented.

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