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US 2006/0138869 A1Published application
Disconnect switch with early break feature
AssigneeAdvance Controls, Inc.
InventorDonald Panuce
Life of this patent
Estimating the term…
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.
Claims12
A disconnect switch for use with an electrical circuit, the electrical circuit comprising a power supply, a load and an inverter drive, the disconnect switch comprising:
- at least one standard break power contact;
- and
- at least one early break auxiliary contact that opens before the standard break power contact if an operator turns off the disconnect switch and closes after the standard break power contact if an operator turns on the disconnect switch.
Dependencies are inferred from the claim text.