Understand Electrical Fast Transient (EFT) Meaning

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SUMMARY

Electrical Fast Transient (EFT) refers to electrical interference that affects communication or IO lines, as well as power lines, primarily caused by nearby lightning strikes or noise from motors. The standard test for measuring immunity against EFT is defined in EN 61000-4-4, which outlines the procedures for evaluating the performance of equipment under such conditions. Understanding EFT is crucial for ensuring the reliability of electronic systems in environments susceptible to electrical disturbances.

PREREQUISITES
  • Knowledge of electrical interference concepts
  • Familiarity with communication and IO lines
  • Understanding of power line standards
  • Awareness of EMC (Electromagnetic Compatibility) testing
NEXT STEPS
  • Research EN 61000-4-4 testing procedures
  • Explore methods for mitigating electrical interference
  • Learn about the impact of lightning strikes on electronic systems
  • Investigate best practices for designing noise-resistant circuits
USEFUL FOR

Electrical engineers, EMC specialists, and professionals involved in the design and testing of electronic systems in environments prone to electrical disturbances.

pixel01
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Can anyone explain to me the meaning of the terms : Electrical Fast Transisient (EFT)?

Thanks
 
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pixel01 said:
Can anyone explain to me the meaning of the terms : Electrical Fast Transisient (EFT)?

Thanks

That's the kind of electrical interference that you can pick up on your communication or IO lines (or power lines) from nearby lightning hits, or from other noise sources like motors. There is a standard test for immunity against EFTs on both your IO lines and power lines. A typical test standard is EN (or IEC) 61000-4-4:

http://www.haefelyemc.com/pdf_downl...t_testing_according_IEC61000-4-4_Edition2.pdf
 
Thank you bekerman for the help.
 

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