Power relay or switch contact tester

Details Power relay or switch contact tester Power relay or switch contact tester

2007-04-24

2007-04-24

Hirshfeld, Andrew H. (Department: 2858)

Electricity: measuring and testing

Electromechanical switching device

Relay

C324S620000

Reexamination Certificate

active

11081264

ABSTRACT:
Embodiments of the invention include a test circuit having an auxiliary low power test signal generator, filters, and a detector to test a power switch. The generator sends an auxiliary low power test signal having a different frequency than a power signal for the switch to an input of the switch. The detector detects the auxiliary low power test signal at an output of the switch. Test circuit filters are used to filter out the power signal from reaching the auxiliary low power test signal generator or the detector circuit. A circuit of the test circuit is tuned to the test signal's different frequency to ensure that the detector only detects the test signal when the switch is in one position. Thus, by detecting or sensing the test signal across the switch, the detector can detect whether the switch is operating properly.

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Dell “PowerEdge” 2500 Systems, User Guide, downloaded from http://support.dell.com/support/edocs/systems/pe2500/en/index.htm—http://support.dell.com/support/edocs/systems/pe2500/en/ug/127kwaa0.htm (Jun. 20, 2005, 5:20PM-5:15PM): 16 pages.

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