prEN 4914-100
(Main)Aerospace series - Test procedures for electromechanical all-or-nothing relays
Aerospace series - Test procedures for electromechanical all-or-nothing relays
This document specifies the test procedures of electromechanical all-or-nothing relays for use in aircraft electrical systems to EN 2282.
This document represents the aeronautical version of the standard EN 116000-3 from which it draws inspiration.
Luft- und Raumfahrt - Prüfverfahren für elektromechanische Schaltrelais
Dieses Dokument legt die Prüfverfahren für elektromechanische Schaltrelais zur Verwendung in elektrischen Systemen von Luftfahrzeugen nach EN 2282 fest.
Diese Norm ist die luftfahrttechnische Fassung der Norm EN 116000-3, von der sie inhaltlich abgeleitet wurde.
Aeronavtika - Preskusni postopki za elektromehanske releje tipa vse ali nič
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2026
Aeronavtika - Preskusni postopki za elektromehanske releje tipa vse ali nič
Aerospace series - Test procedures for electromechanical all-or-nothing relays
Luft- und Raumfahrt - Prüfverfahren für elektromechanische Schaltrelais
Ta slovenski standard je istoveten z: prEN 4914-100
ICS:
29.120.70 Releji Relays
49.060 Letalska in vesoljska Aerospace electric
električna oprema in sistemi equipment and systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2025
ICS 49.060
English Version
Aerospace series - Test procedures for electromechanical
all-or-nothing relays
Luft- und Raumfahrt - Prüfverfahren für
elektromechanische Schaltrelais
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 4914-100:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Test and measurement procedures . 12
4.1 General. 12
4.2 Alternative test methods . 12
4.3 Precision of measurement . 12
4.4 Requirements in Detail Specifications . 12
4.5 Standard conditions for testing . 12
4.6 Mounting styles and terminal type . 13
4.7 Electric wiring . 18
4.8 Functional characteristics . 18
4.8.1 Visual inspection and check of dimensions . 18
4.8.2 Weighing . 18
4.8.3 Relay coil properties . 18
4.8.4 Dielectric test . 20
4.8.5 Impulse voltage test . 21
4.8.6 Insulation resistance . 21
4.8.7 Contact resistance (or voltage drop) . 21
4.8.8 Pick-up voltage . 25
4.8.9 Drop-out voltage . 26
4.8.10 Timing tests. 26
4.9 Mechanical tests . 30
4.9.1 General. 30
4.9.2 Vibration sinusoidal . 31
4.9.3 Vibration random . 31
4.9.4 Shock . 32
4.9.5 Acceleration . 32
4.10 Climatic and environmental tests . 32
4.10.1 Rapid change of temperature . 32
4.10.2 Salt mist . 32
4.10.3 Seal . 33
4.11 Electrical tests . 33
4.11.1 General. 33
4.11.2 Coil current for AC relays . 33
4.11.3 Electromagnetic interference . 33
4.11.4 Outgoing interference voltage . 33
4.11.5 Incoming interference voltage . 34
4.11.6 Power input . 34
4.11.7 Voltage spike . 34
4.11.8 Radio Frequency Susceptibility (Radiated and Conducted) . 34
4.11.9 Lightning Induced Transient Susceptibility . 34
4.11.10 Actuating voltage at high temperature . 35
4.11.11 Voltage drop at low temperature . 35
4.12 Service life . 37
4.12.1 Coil life (duty cycle) . 37
4.12.2 Coil endurance . 39
4.12.3 Mechanical life (at reduced load) . 39
4.12.4 Overload (AC and DC) . 40
4.12.5 Circuit breaker compatibility . 40
4.12.6 Electrical service life — Inductive load . 42
4.12.7 Electrical service life — Motor load . 43
4.12.8 Electrical service life — Resistive load . 44
4.12.9 Electrical service life — Mixed load . 45
Bibliography . 47
European foreword
This document (prEN 4914-100:2025) has been prepared by ASD-STAN.
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
This document is currently submitted to the CEN Enquiry.
1 Scope
This document specifies the test procedures of electromechanical all-or-nothing relays for use in
aircraft electrical systems to EN 2282.
This document represents the aeronautical version of the standard EN 116000-3 from which it draws
inspiration.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2678, Environmental tests for aircraft equipment — Insulation resistance and high voltage tests for
electrical equipment
IEC 60068-2-7, Basic environmental testing procedures. Part 2-7: Tests — Test Ga: Acceleration, steady
state
IEC 60068-2-11, Environmental testing — Part 2-11: Tests — Test Ka: Salt mist
IEC 60068-2-14, Environmental testing — Part 2-14: Tests — Test N: Change of temperature
IEC 60068-2-27, Environmental testing — Part 2-27: Tests — Test Ea and guidance: Shock
IEC 60255-27:2025, Measuring relays and protection equipment - Part 27: Product safety requirements
EN 4915-001, Aerospace series — Hermetically sealed relays 2 PDT, 4 PDT and 6 PDT — Part 1:
Technical specification
ISO 7137, Aircraft — Environmental conditions and test procedures for airborne equipment
MIL-STD-202-204, Method 204, Vibration, high frequency
MIL-STD-202-214, Method 214, Random vibration
MIL-PRF-83536 G, Relays, electromagnetic, established reliability, 25 Amperes and below, general
specification for
RTCA DO-160 G:2010, Environmental conditions and test procedures for airborne equipment
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
electromechanical relay
electrical relay in which the designed response is developed by the relative movement of mechanical
elements under the action of a current in the input circuit(s)
This document is currently under development.
Published by Department of Defense (DoD), available at: https://assist.dla.mil/online/start/.
Published by RT
...
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