Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Reexamination Certificate
2008-01-29
2008-01-29
Jackson, Stephen W. (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
C361S002000
Reexamination Certificate
active
10905309
ABSTRACT:
A disconnect switch that provides a simple and economical means for preventing the possibility of stray/surge current from damaging the solid state components of an inverter drive is provided. The disconnect switch includes early break auxiliary contact(s) that open before the standard power contacts when the switch is turned off by an operator and close after the standard power contacts when the switch is turned on by an operator.
REFERENCES:
patent: 3555396 (1971-01-01), Kalman
patent: 3887860 (1975-06-01), Bernhardt et al.
patent: 3947748 (1976-03-01), Klein
patent: 4237531 (1980-12-01), Cutler et al.
patent: 4894745 (1990-01-01), Akagawa et al.
patent: 5721449 (1998-02-01), Panuce
patent: 6291987 (2001-09-01), Dean et al.
Advance Controls, Inc.
Clausen Miller PC
Jackson Stephen W.
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