SIST EN 3841-503:2005

Aerospace series - Circuit breakers - Test methods - Part 503: Strength of actuating components

This standard specifies a method of verifying the strength of the actuating components of circuit breakers.
It shall be used together with EN 3841-100.

Luft- und Raumfahrt - Schutzschalter - Prüfverfahren - Teil 503: Festigkeit der Betätigungselemente

Série aérospatiale - Disjoncteurs - Méthodes d'essais - Partie 503 : Résistance des éléments de commande

Aeronavtika - Odklopniki - Preskusne metode - 503. del: Trdnost prožilnih elementov

General Information

• Status: Published
• Publication Date: 31-Mar-2005
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: SS SPL - Technical Board for the general field
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Apr-2005
• Due Date: 01-Apr-2005
• Completion Date: 01-Apr-2005
• Ref Project: EN 3841-503:2004 - Aerospace series - Circuit breakers - Test methods - Part 503: Strength of actuating components

Overview

SIST EN 3841-503:2005 is a European aerospace standard developed by CEN and AECMA-STAN that specifies test methods for verifying the strength of actuating components of circuit breakers used in aerospace applications. It forms part of the broader EN 3841 series focused on circuit breaker test methods. This standard is intended to ensure the reliability and durability of critical switching components in aerospace electrical systems under defined mechanical loads.

This standard must be used in conjunction with EN 3841-100, which covers general test methods for aerospace circuit breakers. SIST EN 3841-503:2005 focuses specifically on assessing the mechanical strength of the actuating elements, such as push buttons, by applying transverse and longitudinal forces. Adherence to this standard helps manufacturers validate product robustness and compliance, mitigating potential risks of operational failure in aerospace environments.

Key Topics

• Scope of Test
  Verification of mechanical strength for actuating components of circuit breakers, ensuring no damage from applied loads.

• Test Methods

  • Transverse Load Test: Applying perpendicular force at the end of a push button in both closed and open positions for 1 minute, in four main directions.
  • Longitudinal Load Test: Applying push and pull forces along the direction of button travel for 1 minute each.

• Load Application
  Load values and specific forces are defined by the technical specification related to the product and must be tested accordingly.

• Requirements
  The actuating components must withstand these mechanical stresses without damage, maintaining functional integrity.

• Normative References
  The standard mandates use alongside EN 3841-100 for a comprehensive test regime.

Applications

SIST EN 3841-503:2005 is crucial for the aerospace industry, particularly manufacturers and quality assurance teams responsible for:

• Circuit Breakers in Aerospace Systems
  Ensuring actuating components meet stringent durability demands required by the aviation and space sectors.

• Qualification Testing
  Validating design and manufacturing processes to certify that circuit breakers can handle operational mechanical loads without failure.

• Regulatory Compliance
  Providing documented conformance to European and international aerospace safety standards, facilitating market entry and acceptance.

• Maintenance and Inspection
  Guiding periodic structural integrity testing of actuators to prevent in-flight electrical failures and enhance safety margins.

Related Standards

• EN 3841-100
  General test methods for aerospace circuit breakers, which must be applied alongside Part 503 for a full evaluation.

• Other EN 3841 Series Parts
  Covering electrical, environmental, and mechanical requirements for aerospace circuit breakers and their components.

• AECMA and CENELEC Guidelines
  Underpinning harmonized testing procedures and standardized manufacturing expectations in aerospace electrical components.

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Keywords: EN 3841-503, aerospace circuit breakers, test methods, actuating components strength, mechanical load test, push button durability, aerospace electrical standards, CEN aerospace standards, AECMA-STAN, circuit breaker testing, European aerospace compliance.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2005
Aeronavtika - Odklopniki - Preskusne metode - 503. del: Trdnost prožilnih
elementov
Aerospace series - Circuit breakers - Test methods - Part 503: Strength of actuating
components
Luft- und Raumfahrt - Schutzschalter - Prüfverfahren - Teil 503: Festigkeit der
Betätigungselemente
Série aérospatiale - Disjoncteurs - Méthodes d'essais - Partie 503 : Résistance des
éléments de commande
Ta slovenski standard je istoveten z: EN 3841-503:2004
ICS:
49.060 /HWDOVNDLQYHVROMVND Aerospace electric
HOHNWULþQDRSUHPDLQVLVWHPL equipment and systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 3841-503
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2004
ICS 49.060
English version
Aerospace series - Circuit breakers - Test methods - Part 503:
Strength of actuating components
Série aérospatiale - Disjoncteurs - Méthodes d'essais - Luft- und Raumfahrt - Schutzschalter - Prüfverfahren - Teil
Partie 503 : Résistance des éléments de commande 503: Festigkeit der Betätigungselemente
This European Standard was approved by CEN on 10 September 2004.
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. Up-to-date lists and bibliographical references concerning such national
standards 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 translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
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, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3841-503:2004: E
worldwide for CEN national Members.

Contents Page
Foreword.3
1 Scope .4
2 Normative references .
...