SIST EN 3841-401:2005

Aerospace series - Circuit breakers - Test methods - Part 401: Sand and dust

This standard specifies a method of verifying the ability of circuit breakers to withstand sand and dust..
It shall be used together with EN 3841-100.

Luft- und Raumfahrt - Schutzschalter - Prüfverfahren - Teil 401: Sand und Staub

Série aérospatiale - Disjoncteurs - Méthodes d'essais - Partie 401 : Sable et poussieres

Aeronavtika - Odklopniki - Preskusne metode - 401. del: Pesek in prah

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 3841-401:2004 - Aerospace series - Circuit breakers - Test methods - Part 401: Sand and dust

Overview

EN 3841-401:2004 - Aerospace series - Circuit breakers - Test methods - Part 401: Sand and dust is a European standard prepared by AECMA‑STAN and adopted by CEN. It specifies a reproducible method to verify the ability of aerospace circuit breakers to withstand sand and dust ingress and abrasion under controlled environmental test conditions. This part is intended to be used together with EN 3841-100 (Part 100: General) and references the sand and dust procedure in ISO 7137.

Key topics and requirements

• Purpose: Verify circuit breaker resistance to sand and dust exposure (ingress, abrasion, functional integrity).
• Mounting: Devices shall be mounted on a support inside a test chamber and be completely exposed to the air flow.
• Test cycles:
  • Two cycles are defined: the breaker at no load in the ON position for the first cycle and in the OFF position for the second.
• Test procedure: The sand and dust exposure follows ISO 7137 test procedure 1.7 (airborne sand/dust test).
• Exposure coverage and duration: All six surfaces of the circuit breaker are exposed to the sand stream; test duration is fixed at 2 hours per surface.
• Acceptance criteria: Post-test requirements are defined by the applicable technical specification and product standard for the specific circuit breaker (functional performance, sealing, mechanical damage, and electrical integrity as applicable).

Practical applications and users

Who uses EN 3841-401:

• Aerospace manufacturers and component designers specifying environmental robustness for circuit breakers.
• Qualification and test laboratories performing environmental endurance and ingress testing.
• Certification bodies and procurement engineers evaluating supplier compliance and product acceptance.
• Maintenance and reliability engineers assessing field performance risks in sand/dust-prone environments (desert operations, ground support exposure).

Why it matters:

• Ensures consistent, repeatable testing for environmental testing, dust and sand resistance, and aerospace electrical components.
• Helps reduce in-service failures caused by particulate ingestion and abrasion.
• Provides a harmonized test basis for contract specifications and regulatory compliance in the European aerospace supply chain.

Related standards

• EN 3841-100 - Aerospace series - Circuit breakers - Test methods - Part 100: General (mandatory companion document).
• ISO 7137 - Aircraft - Environmental conditions and test procedures for airborne equipment (contains the referenced sand/dust test procedure 1.7).

Keywords: EN 3841-401, aerospace circuit breakers, sand and dust test, environmental testing, ISO 7137, CEN, AECMA‑STAN, circuit breaker qualification.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2005
Aeronavtika - Odklopniki - Preskusne metode - 401. del: Pesek in prah
Aerospace series - Circuit breakers - Test methods - Part 401: Sand and dust
Luft- und Raumfahrt - Schutzschalter - Prüfverfahren - Teil 401: Sand und Staub
Série aérospatiale - Disjoncteurs - Méthodes d'essais - Partie 401 : Sable et poussieres
Ta slovenski standard je istoveten z: EN 3841-401:2004
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 3841-401
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2004
ICS 49.060
English version
Aerospace series - Circuit breakers - Test methods - Part 401:
Sand and dust
Série aérospatiale - Disjoncteurs - Méthodes d'essais - Luft- und Raumfahrt - Schutzschalter - Prüfverfahren - Teil
Partie 401 : Sable et poussières 401: Sand und Staub
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 3841-401:2004: E
worldwide for CEN national Members.

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