IEC 61000-4-4 is the International Electrotechnical Commission's immunity standard based on electrical fast transient (EFT) / burst transients. This publication is part of the greater IEC 61000 group of standards which is covered under IEC TR 61000-4-1:2016.[1] The current third version of this standard (2012) replaces the second version (2004).[2] The goal of this standard is to establish a common and reproducible reference for evaluating the immunity of electrical and electronic equipment when subjected to electrical fast transient/bursts on supply, signal, control and earth ports.[3]

EFT test levels (IEC/EN 61000-4-4)[4]
Power ports, earth ports (PE)
LevelVoltage peak (kV)Repetition frequency (kHz)
1.5 kV5 or 100 kHz
21 kV5 or 100 kHz
32 kV5 or 100 kHz
44 kV5 or 100 kHz
xspecialspecial
x can be any level specified in product specific standards

Note: This tables purpose is a quick overview. It does not contain the same level of detail as the official IEC 61000-4-4.

The cause of electrical fast transients (EFT) come from an arc when mechanical contact is open due to a switching process.[5] Given the fast rise time and voltage of these pulses having a solid ground connection is important during the testing process.[6] Testing for EFT often requires a capacitive coupling clamp (CCL), which is employed to add disturbances to nominal signals.[7]

See also

References

  1. ↑ "IEC TR 61000-4-1:2016 - IEC Webstore - electromagnetic compatibility, EMC, smart city". webstore.iec.ch.
  2. ↑ "IEC 61000-4-4:2012 - IEC Webstore - electromagnetic compatibility, EMC, smart city, rural electrification". webstore.iec.ch.
  3. ↑ "IEC 61000-4-4 Fast Transient/Burst Testing Lab with EMC / EMI Experts". Keystone Compliance.
  4. ↑ IEC 61000-4-2 (3.0 ed.). International Electrotechnical Commission (IEC). December 2008. p. 11. ISBN 978-0-58069-361-8.
  5. ↑ "Teseq: IEC/EN 61000-4-4". www.teseq.com.
  6. ↑ "EN IEC 61000-4-4 - EFT/Burst Immunity Generator Rentals". Transient Specialists.
  7. ↑ "Modeling the IEC 61000-4-4 EFT injection clamp - Request PDF". ResearchGate.
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