Disconnect switch with early break feature

Details Disconnect switch with early break feature Disconnect switch with early break feature

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

07324314

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.

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