EN 61000-4-25:2002/A2:2020

Electromagnetic compatibility (EMC) - Part 4-25: Testing and measurement techniques - HEMP immunity test methods for equipment and systems

Elektromagnetische Verträglichkeit (EMV) - Teil 4-25: Prüf- und Messverfahren - Prüfung der Störfestigkeit von Einrichtungen und Systemen gegen HEMP-Störgrößen

Compatibilité électromagnétique (CEM) - Partie- 4-25: Techniques d'essai et de mesure - Méthodes d'essai d'immunité à l'IEMN-HA des appareils et des systèmes

Elektromagnetna združljivost (EMC) – 4-25. del: Preskušanje in merilne tehnike - HEMP preskušanje odpornosti za naprave in sisteme - Dopolnilo A2

General Information

• Status: Published
• Publication Date: 05-Mar-2020
• Withdrawal Date: 14-Jan-2023
• ICS: 33.100.99 - Other aspects related to EMC
• Technical Committee: CLC/TC 210 - Electromagnetic Compatibility (EMC)
• Drafting Committee: IEC/SC 77C - IEC_SC_77C
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 06-Mar-2020
• Completion Date: 06-Mar-2020
• Directive: 2014/30/EU - Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility (recast)
• Mandate: M/490 - Standardisation mandate to the European Standardisation Organisations (ESOs) to support European Smart Grid deployment
• Ref Project: SIST EN 61000-4-25:2003/A2:2020 - Electromagnetic compatibility (EMC) - Part 4-25: Testing and measurement techniques - HEMP immunity test methods for equipment and systems

Relations

• Amends: EN 61000-4-25:2002 - Electromagnetic compatibility (EMC) - Part 4-25: Testing and measurement techniques - HEMP immunity test methods for equipment and systems
• Effective Date: 26-Jan-2023

Overview

EN 61000-4-25:2002/A2:2020 (aligned with IEC 61000-4-25:2001/A2:2019) is a European amendment for electromagnetic compatibility (EMC) testing focused on HEMP immunity test methods for equipment and systems. It updates radiated HEMP (high-altitude electromagnetic pulse) immunity test and measurement techniques used to evaluate how electronic equipment and systems behave when exposed to simulated HEMP environments. The amendment (A2) was approved by CENELEC in 2020 and refines simulator performance, pulse waveform tolerances, and field uniformity requirements.

Key topics and technical requirements

• HEMP pulse waveform: Specifies early-time pulse parameters (rise time, pulse width, pre-pulse limits) for simulators.
  • Small test facilities: rise time 2.5 ns ±0.5 ns; pulse width 23 ns ±5 ns; pre-pulse ≤7% of peak.
  • Large simulators (Type I): rise time 2.5 ns ±0.5 ns; pulse width 23 ns (tolerance −5 ns / +50 ns).
  • Large simulators (Type II): require pre-test analysis; rise time 2.5 ns (tolerance −0.5 ns / +7.5 ns); pulse width tolerance 0 / +477 ns.
• Field ratio and impedance: Peak electric-to-magnetic field ratio set to 377 Ω with a tolerance of ±75 Ω.
• Spectrum and frequency tolerance:
  • Small facilities: smoothed frequency-spectrum fluctuations ≤ ±3 dB (100 kHz–300 MHz).
  • Type I large simulators: ±10 dB (1 MHz–200 MHz).
  • Type II large simulators: ±10 dB (1 MHz–100 MHz).
• Field uniformity and reflections:
  • Peak field uniformity across the test volume: within Epeak to Epeak + 6 dB.
  • Electric field reflections from terminator < 10%.
  • Non-principal electromagnetic components < 10% of peak at time of peak field.
• Measurement protocol: Requires electric and magnetic field measurements at the centre and eight corners of the defined parallelepiped test volume (in absence of the EUT).

Applications and practical value

• Use for HEMP immunity testing, product qualification, and compliance verification of equipment intended for critical sectors:
  • Telecommunications, power utilities, transportation, aerospace, defense, medical devices and control systems.
• Helps test labs and OEMs design HEMP simulators or choose appropriate test facilities and set acceptance criteria for product robustness against high-altitude EMP threats.
• Supports procurement specifications, risk assessment, and regulatory compliance where radiated high-energy transient immunity is a requirement.

Who should use this standard

• EMC test laboratories and certification bodies
• Product and systems engineers for critical infrastructure
• Designers of HEMP simulators and test facilities
• Regulatory authorities and procurement teams specifying immunity requirements

Related standards

• IEC/EN 61000-4 series (other parts addressing EMC test methods)
• IEC 61000-4-25 (base international publication)

Keywords: EN 61000-4-25, IEC 61000-4-25, HEMP immunity testing, EMC testing, HEMP simulators, radiated immunity, high-altitude electromagnetic pulse, field uniformity, pulse waveform tolerances.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2020
Elektromagnetna združljivost (EMC) – 4-25. del: Preskušanje in merilne tehnike -
HEMP preskušanje odpornosti za naprave in sisteme - Dopolnilo A2
Electromagnetic compatibility (EMC) - Part 4-25: Testing and measurement techniques -
HEMP immunity test methods for equipment and systems
Elektromagnetische Verträglichkeit (EMV) - Teil 4-25: Prüf- und Messverfahren - Prüfung
der Störfestigkeit von Einrichtungen und Systemen gegen HEMP-Störgrößen
Compatibilité électromagnétique (CEM) - Partie- 4-25: Techniques d'essai et de mesure
- Méthodes d'essai d'immunité à l'IEMN-HA des appareils et des systèmes
Ta slovenski standard je istoveten z: EN 61000-4-25:2002/A2:2020
ICS:
33.100.20 Imunost Immunity
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61000-4-25:2002/A2

NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2020
ICS 33.100.99
English Version
Electromagnetic compatibility (EMC) - Part 4-25: Testing and
measurement techniques - HEMP immunity test methods for
equipment and systems
(IEC 61000-4-25:2001/A2:2019)
Compatibilité électromagnétique (CEM) - Partie- 4-25: Elektromagnetische Verträglichkeit (EMV) - Teil 4-25: Prüf-
Techniques d'essai et de mesure - Méthodes d'essai und Messverfahren - Prüfung der Störfestigkeit von
d'immunité à l'IEMN-HA des appareils et des systèmes Einrichtungen und Systemen gegen HEMP-Störgrößen
(IEC 61000-4-25:2001/A2:2019) (IEC 61000-4-25:2001/A2:2019)
This amendment A2 modifies the European Standard EN 61000-4-25:2002; it was approved by CENELEC on 2020-01-15. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61000-4-25:2002/A2:2020 E

European foreword
The text of document 77C/285/CDV, future IEC 61000-4-25/A2, prepared by SC 77C "High power
transient phenomena" of IEC/TC 77 "Electromagnetic compatibility" was submitted to the IEC-
CENELEC parallel vote and approved by CENELEC as EN 61000-4-25:2002/A2:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-10-15
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-01-15
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association.
Endorsement notice
The text of the International Standard IEC 61000-4-25:2001/A2:2019 was approved by CENELEC as
a European Standard without any modification.
IEC 61000-4-25 ®
Edition 1.0 2019-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 2
AM ENDEMENT 2
Electromagnetic compatibility (EMC) –

Part 4-25: Testing and measurement techniques – HEMP immunity test methods

for equipment and systems
Compatibilité électromagnétique (CEM) –

Partie 4-25: Techniques d’essai et de mesure – Méthodes d’essai d’immunité à

l’IEMN-HA des appareils et des systèmes

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.100.99 ISBN 978-2-8322-7688-4
...