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ELECTROMAGNETIC SIGNATURE Analysis (EMSA)

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ElectroMagnetic Signature Analysis (EMSA) is a highly-complex, advanced diagnostic technology that provides a superior analytic method applied to electrical systems to determine the health of the assets. EMSA testing is performed online at full power with no signals introduced to the system, no hot connections made, and no outages required for this testing. This is a major advantage for clients concerned about monitoring asset health while energized and at full power.

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This testing technique utilized by AI AES USA allows us to identify and trend anomalies, incipient faults, or previously developed faults before they become catastrophic events. This technology identifies anomalies both in the asset and appurtenances, far beyond any other existing offline testing techniques available.

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The advantages to EMSA testing include:
 

  • Online, non-invasive, completely passive

  • No hot connections or outages are required

  • Determines asset health and provides maintenance recommendations on the first test.

  • Detects defects in generators, motors, bus systems, transformers, switchgear, switchyards, and more.

  • Over 11,000 tests performed on all types of apparatus.

  • Proprietary hardware, software, and analysis techniques.

EMSA IS A SYSTEM EVALUATION

Electrical and Mechanical problems are identified on the first test.

By definition, EMSA is:

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The precise frequency domain measurement and identification of radio frequency (RF) energy that results from electrical activity at defects. EMSA data is available from high frequency current transients to ground resulting from a defect or radio energy radiated through the air from a defect. EMSA has provided condition-based maintenance information at hundreds of locations since 1980.

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EMSA Technologies

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  • Over 10,000 tests since 1980.

  • More than 500 different machine designs from 25 HP to 1,100 MVA.

  • Over 1000 transformers (oil and dry).

  • 1000’s of power cables (up to 345kV).

  • 100’s of breakers (415 V to 345 kV).

  • Over 75 types of system defects and conditions have been identified.

  • EMSA Diagnostics are applicable to all power systems 25, 50, 60 Hz.

  • Optimal results occur on 2,300 Volt AC systems and higher.

  • Some success with 250 & 600 V dc power systems.


EMSA has the ability to detect and classify a variety of patterns generated by electrical and mechanical defects. Scheduled condition-based maintenance can then be focused on only the system components where deterioration is indicated. The number of in-service failures and costs can be greatly reduced.

EMSA HAS BEEN APPLIED TO MANY DIFFERENT SYSTEMS

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