Telemetry System provides generator/motor protection.

Press Release Summary:

Designed to protect brushless generators and large motors from catastrophic failure, EFREM Earth Fault Resistance Monitor combines ground fault measurement techniques with digital telemetry technology. In addition to fault location indication, wireless system continuously monitors and charts earth fault severity, providing predictive maintenance condition monitoring. Alarm relay outputs for multiple resistance levels can be used to activate warnings or shut down machines.


Original Press Release:

Improved Generator/Motor Protection Telemetry System Announced by Accumetrics Associates

-- Continuous trending and charting of insulation fault resistance -- SCHENECTADY, NY (Nov. 28) - Ground/Earth Fault monitoring of up to 80 megohms in large brushless generators and motors is now available from Accumetrics Associates, Inc. This wireless digital telemetry continuously monitors and charts earth fault severity, providing predictive maintenance condition monitoring. Created to protect brushless generators and large motors from catastrophic failure, the Earth Fault Resistance Monitor (EFREM) combines advanced ground fault measurement techniques with the latest innovations in digital telemetry technology. Based on more than a decade of innovation in generator/motor rotor protection, EFREM provides: o Quantitative measurement of fault severity, o Continuous trending and charting of fault resistances (insulation resistance to rotor ground), o Fault location indication for easy diagnosis and repair, o Shorted turns field voltage monitoring, o Field excitation voltage monitoring, and o Alarm relay outputs for multiple resistance levels that can be used to activate warnings or shut down machines. The improved EFREM has already proven its worth by allowing the operators at Arizona Public Service Company (APS) to assess a ground fault indication that was the result of water from a heavy rain getting into the machine. As operators warmed up the field winding, and heat drove the water out, and operators were able to able to continuously monitor resistance as it rose back to normal levels. Using information provided by the Earth Fault Resistance Monitor, APS was able to keep the generator available and to avoid an expensive outage to discover the source of the fault. Accumetrics Associates enables the dependable measurement of rotor temperature, shaft torque, turbine blade pressure and other rotary sensor needs through advanced digital rotor telemetry. By adapting advanced aerospace technology to rotating machines, Accumetrics has become a worldwide technological leader and supplier to leading manufacturers and users of motors, generators, and turbomachinery. Accumetrics' product offerings range from highly sophisticated digital telemetry systems with hundreds of channels to simple, low-cost devices that monitor and protect rotor components. For additional information about EFREM, contact Mark Klein, Director of Sales and Marketing, at 518-393-2200 ext. 124, email mklein@accumetrix.com, write Accumetrics Associates, Inc., 409 Front Street, Schenectady, NY 12305 or FAX 518-393-3622, or visit www.accumetrix.com. Improved Generator/Motor Protection System - Created to continuously monitor insulation fault resistance and protect generators and large motors from catastrophic failure, the Earth Fault Resistance Monitor (EFREM) from Accumetrics Associates, Inc. now continuously monitors and charts insulation fault resistance up to 80 megohms.

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