SIST EN 2349-304:2009

Aerospace series - Requirements and test procedures for relays and contactors - Part 304: Operate and release time

This standard specifies a method for testing the operating (actuating) and releasing time of relays and contactors. It shall be used together with EN 2349-100.

Luft- und Raumfahrt - Anforderungen und Prüfverfahren für Relais und Schaltschütze - Teil 304: Ansprechzeit und Rückfallzeit

Diese Norm legt ein Verfahren zur Prüfung der Ansprech  (Betätigungs ) und Rückfallzeit von Relais und Schaltschützen fest. Sie ist in Verbindung mit EN 2349 100 anzuwenden.

Série aérospatiale - Exigences et méthodes d'essais des relais et contacteurs - Partie 304 : Temps d'enclenchement et de déclenchement

Aeronavtika - Zahteve in preskusni postopki za releje in kontaktorje - 304. del: Odzivni in sprostitveni čas

General Information

• Status: Published
• Publication Date: 31-Mar-2009
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 20-Mar-2009
• Due Date: 25-May-2009
• Completion Date: 01-Apr-2009
• Ref Project: EN 2349-304:2006 - Aerospace series - Requirements and test procedures for relays and contactors - Part 304: Operate and release time

Relations

• Refers: SIST EN 20287:2000 - Paper and board - Determination of moisture content - Oven-drying method (ISO 287:1985)
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 2349-411:2009 - Aerospace series - Requirements and test procedures for relays and contactors - Part 411: Temperature change
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 2349-414:2009 - Aerospace series - Requirements and test procedures for relays and contactors - Part 414: Mechanical shock
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 2593-001:2015 - Aerospace series - Bases for 10 A electromagnetic plug-in relays, two and four poles double thrown - Part 001: Technical specification
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 2349-413:2009 - Aerospace series - Requirements and test procedures for relays and contactors - Part 413: Vibration, sinusoidal and random
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 2349-415:2009 - Aerospace series - Requirements and test procedures for relays and contactors - Part 415: Acceleration
• Effective Date: 28-Jan-2026

Overview

SIST EN 2349-304:2009 is a European standard within the aerospace series that defines the test procedures and requirements for measuring the operate (actuating) and release time of relays and contactors used in aerospace electrical equipment. This standard plays a critical role in ensuring the reliability and performance of relays and contactors under the demanding conditions of aerospace environments. It is intended to be applied in conjunction with the general requirements specified in EN 2349-100.

Key Topics

• Operate (Actuating) Time
  The operate time of relays and contactors is measured from the application of the rated voltage to the coil until the last normally-open contact closes. The procedure excludes any contact bounce time and specifies parameters for contact load and open contact voltage.

• Release Time
  The release time is defined as the time from removal of the rated voltage until the final contact opens (for normally-open) or closes (for change-over contacts). The measurement is also performed without factoring bounce time, and specific electrical parameters must be maintained during testing.

• Test Procedures

  • The test circuits and measurement methods are outlined for consistency and accuracy.
  • Five measurements must be recorded for qualification tests.
  • The test loads and voltages depend on the relay or contactor’s current rating.

• Evaluation and Criteria
  Actuate and release times must comply with values set in the specific product standard, confirming suitability for application in critical aerospace systems.

Applications

This standard is essential across multiple aerospace sectors, including aircraft manufacturing, defense technology, and maintenance organizations. Key applications include:

• Aerospace Electrical Systems
  Ensuring prompt and reliable activation and deactivation of electrical circuits, which is vital for flight safety and system integrity.

• Component Qualification
  Supporting the qualification process for relays and contactors, making certain that only components with consistent response times under test parameters are deployed.

• Quality Assurance and Compliance
  Manufacturers and suppliers use SIST EN 2349-304:2009 to demonstrate compliance with international aerospace requirements, facilitating global acceptance and interoperability.

• Maintenance and Upgrades
  Maintenance engineers rely on this standard to verify or troubleshoot time-dependent functions of relays and contactors in service.

Related Standards

• EN 2349-100: The general requirements and procedures for relays and contactors in aerospace applications. EN 2349-304 must be used alongside this standard for comprehensive compliance.

• ISO 2678: Specifies environmental test methods-such as insulation resistance and high-voltage tests-for aircraft electrical equipment, supporting holistic assessment of relay and contactor performance.

Keywords: SIST EN 2349-304:2009, aerospace standard, relays, contactors, operate time, release time, test procedures, electrical equipment, EN 2349-100, aircraft component testing

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By adhering to SIST EN 2349-304:2009, organizations can assure precise and standardized testing of relays and contactors, directly contributing to the overall safety, functionality, and international compliance of aerospace electrical systems.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Anforderungen und Prüfverfahren für Relais und Schaltschütze - Teil 304: Ansprechzeit und RückfallzeitSérie aérospatiale - Exigences et méthodes d'essais des relais et contacteurs - Partie 304 : Temps d'enclenchement et de déclenchementAerospace series - Requirements and test procedures for relays and contactors - Part 304: Operate and release time49.060Aerospace electric equipment and systemsICS:Ta slovenski standard je istoveten z:EN 2349-304:2006SIST EN 2349-304:2009en,de01-maj-2009SIST EN 2349-304:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 2349-304October 2006ICS 49.060 English VersionAerospace series - Requirements and test procedures for relaysand contactors - Part 304: Operate and release timeSérie aérospatiale - Exigences et méthodes d'essais desrelais et contacteurs - Partie 304 : Temps d'enclenchementet de déclenchementLuft- und Raumfahrt - Anforderungen und Prüfverfahren fürRelais und Schaltschütze - Teil 304: Ansprechzeit undRückfallzeitThis European Standard was approved by CEN on 10 May 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 2349-304:2006: ESIST EN 2349-304:2009
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