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| {{short description|Electrotechnical immunity standard}}
| | ==EFT高压脉冲群== |
| '''IEC 61000-4-4''' is the [[International_Electrotechnical_Commission|International Electrotechnical Commission's]] immunity standard based on electrical fast transient (EFT) / burst [[Transient (oscillation)|transients]]. This publication is part of the greater IEC 61000 group of standards which is covered under IEC TR 61000-4-1:2016.<ref>{{cite web|url=https://webstore.iec.ch/publication/24660|title=IEC TR 61000-4-1:2016 - IEC Webstore - electromagnetic compatibility, EMC, smart city|website=webstore.iec.ch}}</ref> The current third version of this standard (2012) replaces the second version (2004).<ref>{{cite web|url=https://webstore.iec.ch/publication/4222|title=IEC 61000-4-4:2012 - IEC Webstore - electromagnetic compatibility, EMC, smart city, rural electrification|website=webstore.iec.ch}}</ref> 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.<ref>{{cite web|url=https://keystonecompliance.com/iec-61000-4-4/|title=IEC 61000-4-4 Fast Transient/Burst Testing Lab with EMC / EMI Experts|website=Keystone Compliance}}</ref>
| | IEC 61000-4-4是国际电工委员会的抗扰度标准，基于电快速瞬变（EFT）/突发瞬变。该出版物是IEC 61000-4-1：2016涵盖的更大的IEC 61000标准组的一部分。 |
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| | ==EFT测试等级== |
| {| class="wikitable" | | {| class="wikitable" |
| |- align=center bgcolor="#CCCCCC" | | |- align=center bgcolor="#CCCCCC" |
| !colspan=10 |EFT test levels (IEC/EN 61000-4-4)<ref name=esd>{{cite book|title=IEC 61000-4-2|date=December 2008|publisher=International Electrotechnical Commission (IEC)|isbn=978-0-58069-361-8|pages=11|edition=3.0}}</ref> | | !colspan=10 |EFT test levels (IEC/EN 61000-4-4) |
| |- align="center" | | |- align="center" |
| | colspan="3" |''Power ports, earth ports (PE)'' | | | colspan="3" |''Power ports, earth ports (PE)'' |
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| | colspan="3" |''x can be any level specified in product specific standards'' | | | colspan="3" |''x can be any level specified in product specific standards'' |
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| ''Note: This tables purpose is a quick overview. It does not contain the same level of detail as the official IEC 61000-4-4.''<br><br/>The cause of electrical fast transients (EFT) come from an arc when mechanical contact is open due to a switching process.<ref>{{cite web|url=http://www.teseq.com/standards/iec-en-61000-4-4.php|title=Teseq: IEC/EN 61000-4-4|website=www.teseq.com}}</ref> Given the fast rise time and voltage of these pulses having a solid [[Ground (electricity)|ground]] connection is important during the testing process.<ref>{{cite web|url=https://transientspecialists.com/collections/en-iec-61000-4-4|title=EN IEC 61000-4-4 - EFT/Burst Immunity Generator Rentals|website=Transient Specialists}}</ref> Testing for EFT often requires a capacitive coupling clamp (CCL), which is employed to add disturbances to nominal signals.<ref>{{cite web|url=https://www.researchgate.net/publication/224344516|title=Modeling the IEC 61000-4-4 EFT injection clamp - Request PDF|website=ResearchGate}}</ref>
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| == See also ==
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| *[[List of common EMC test standards]]
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| *[[List of IEC standards]]
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| *[[List of EN standards]]
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| == References ==
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| {{reflist}}
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| [[Category:International Electrotechnical Commission]]
| | ==EFT脉冲群的意义== |
| | 电气快速瞬变（EFT）的原因是由于开关过程而导致机械触点断开时产生的电弧。鉴于这些脉冲的快速上升时间和电压具有牢固的接地连接，在测试过程中非常重要。 |
| | 对EFT的测试通常需要电容耦合钳（CCL），该电容被用来给标称信号增加干扰。 |
