Compressor protection and grid fault detection device

Details Compressor protection and grid fault detection device Compressor protection and grid fault detection device

2009-02-19

2011-10-25

Leykin, Rita (Department: 2837)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

C361S056000, C361S057000, C361S031000, C361S063000, C361S093100, C324S500000, C324S511000, C324S512000, C324S522000, C318S432000, C318S434000

Reexamination Certificate

active

08045302

ABSTRACT:
A compressor monitoring system includes current and voltage monitors, current and voltage averaging modules, a control module, and a switch. The current monitor measures a current drawn by a motor of a compressor. The current averaging module generates first and second average current values based on the current measured by the current monitor. The voltage monitor measures a utility power voltage. The voltage averaging module generates first and second average voltage values based on the voltage measured by the voltage monitor. The control module selectively generates a fault signal when a first ratio is greater than a first predetermined threshold and a second ratio is less than a second predetermined threshold. The first ratio is based on the first and second average current values. The second ratio is based on the first and second average voltage values. The switch deactivates the motor when the fault signal is generated.

REFERENCES:
patent: 4653285 (1987-03-01), Pohl
patent: 4724678 (1988-02-01), Pohl
patent: 4990057 (1991-02-01), Rollins
patent: 6138204 (2000-10-01), Amon et al.
patent: 6351361 (2002-02-01), Kawazu et al.
patent: 6498462 (2002-12-01), Ballantine et al.
patent: 6760207 (2004-07-01), Wyatt et al.
patent: 7282921 (2007-10-01), Sela et al.
patent: 7352545 (2008-04-01), Wyatt et al.
patent: 7447568 (2008-11-01), Christensen et al.
patent: 7940506 (2011-05-01), Lewis
patent: 2002/0141877 (2002-10-01), Jayanth et al.
patent: 2006/0182635 (2006-08-01), Jayanth
patent: 2008/0177678 (2008-07-01), Di Martini et al.
Written Opinion regarding International Application No. PCT/US2009/034679 dated Oct. 16, 2009.
International Search Report dated Oct. 16, 2009 regarding International Application No. PCT/US2009/034679.
J. Carlos Haiad, Southern California Edison; ARI-ACEEE Energy Efficiency Summit; “A/C Unit Stalling Background Briefing”; Jul. 19-20, 2007.

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