A Low Cost Electromagnetic Induction Ground Fault Detector Navy SBIR FY2011.2 Sol No.: Navy SBIR FY2011.2 Topic No.: N112-133 Topic Title: A Low Cost Electromagnetic Induction Ground Fault Detector Proposal No.: N112-133-0625 Firm: Creare Inc. P.O. Box 71 Hanover, New Hampshire 03755 Contact: Bruce Pilvelait Phone: (603) 643-3800 Web Site: www.creare.com Abstract: Cabling faults can be difficult to identify and locate when a large number of interconnections are used such as in the shipboard Machinery Control System. Ungrounded systems further complicate diagnosis, since signal voltages and currents are small amplitude. It often takes a considerable amount of time to identify and locate the fault, and the equipment capability can be substantially reduced while troubleshooting occurs. We propose to develop a low-cost ground fault detector and locator which dramatically reduces time required to identify and locate the problem. Our concept has been developed specifically for ungrounded systems, and this method allows rapid isolation and convergence to the exact nature and location of the problem. This method can be implemented either as a low-cost handheld diagnostic tool, or as part of an integrated continuous real-time health monitoring system. Operational costs will be reduced by (1) quickly identifying which cable has the problem, (2) locating the exact location of the problem, and (3) prompt remediation. In Phase I we will develop a prototype to demonstrate feasibility, and during Phase II we will fabricate systems for further evaluation. Data will be correlated with inspection results to determine the effectiveness of the approach. Benefits: The benefit of this tool will be the rapid identification and location of cabling faults in complex instrumentation such as ungrounded systems. Downtime and diagnostic labor of complex instrumentation systems will be reduced and overall operating costs will improve. The commercial applications include instrumentation control systems such as industrial manufacturing plants with a large number of instruments and machines and building environmental control systems such as heating ventilation and air conditioning. Our approach provides a flexible, low-cost solution that will benefit ships, aircraft, automobiles, and many other industrial applications. Return