SIST EN 3841-504:2005

Aerospace series - Circuit breakers - Test methods - Part 504: Strength of mounting elements

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

Luft- und Raumfahrt - Schutzschalter - Prüfverfahren - Teil 504: Festigkeit der Befestigung

Série aérospatiale - Disjoncteurs - Méthodes d'essais - Partie 504 : Résistance des éléments de fixation

La présente norme spécifie une méthode pour vérifier la résistance des éléments de fixation des disjoncteurs.
Elle doit être utilisée conjointement avec EN 3841-100.

Aeronavtika - Odklopniki - Preskusne metode - 504. del: Trdnost pritrdilnih 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 3841-504:2004 - Aerospace series - Circuit breakers - Test methods - Part 504: Strength of mounting elements

Overview

EN 3841-504:2004 - Aerospace series - Circuit breakers - Test methods - Part 504: Strength of mounting elements - is a CEN-adopted test method that specifies how to verify the mechanical strength of the mounting elements of aerospace circuit breakers. It is part of the EN 3841 family and is intended to be used together with EN 3841-100 (general test methods). The standard was prepared under AECMA‑STAN and adopted by CEN members for harmonized national implementation.

Key topics and requirements

• Scope: Verifies the mechanical integrity and strength of circuit breaker mounting elements used in aerospace equipment and systems.
• Normative reference: EN 3841-100 (Aerospace series – Circuit breakers – Test methods – Part 100: General) is required for application.
• Mounting procedure: The tightening torque defined in the applicable technical specification must be applied three times for 1 minute each, with one disassembly between each torque application.
• Rotation procedure: The circuit breaker housing is rotated about its mounting in both directions, successively, at the torque value specified in the technical specification.
• Acceptance criteria: After testing there must be no deformation outside tolerances, no rupture of the locating device, and the circuit breaker housing must not break.
• Final requirement: Conformance is determined in accordance with the applicable technical specification and product standard.

Practical applications

• Manufacturers of aerospace circuit breakers use EN 3841-504 during product development and production verification to ensure mounting elements meet mechanical strength expectations.
• Component test laboratories implement the method to provide independent verification and test reports for qualification and batch testing.
• Aircraft OEMs and systems integrators reference the standard when specifying circuit breaker components and acceptance criteria in procurement and system design.
• Quality, certification and maintainers use the standard to confirm that mounting elements will withstand installation torque and operational disturbances without structural failure.

Benefits & keywords

Using EN 3841-504 helps ensure reliable mechanical attachment of circuit breakers in aerospace environments, reducing risk of loosening, deformation or failure. Relevant keywords: EN 3841-504, aerospace circuit breakers, mounting element strength, test methods, EN 3841-100, AECMA‑STAN, CEN, torque test, rotation test, product qualification.

Related standards

• EN 3841-100 - Aerospace series – Circuit breakers – Test methods – Part 100: General (normative reference)
• Product-specific technical specifications and product standards referenced by the supplier or OEM for detailed torque values and tolerance limits.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2005
Aeronavtika - Odklopniki - Preskusne metode - 504. del: Trdnost pritrdilnih
elementov
Aerospace series - Circuit breakers - Test methods - Part 504: Strength of mounting
elements
Luft- und Raumfahrt - Schutzschalter - Prüfverfahren - Teil 504: Festigkeit der
Befestigung
Série aérospatiale - Disjoncteurs - Méthodes d'essais - Partie 504 : Résistance des
éléments de fixation
Ta slovenski standard je istoveten z: EN 3841-504:2004
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 3841-504
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2004
ICS 49.060
English version
Aerospace series - Circuit breakers - Test methods - Part 504:
Strength of mounting elements
Série aérospatiale - Disjoncteurs - Méthodes d'essais - Luft- und Raumfahrt - Schutzschalter - Prüfverfahren - Teil
Partie 504 : Résistance des éléments de fixation 504: Festigkeit der Befestigung
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 3841-504:2004: E
worldwide for CEN national Members.

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