SIST EN 3841-301:2005

Aerospace series - Circuit breakers - Test methods - Part 301: Voltage drop

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

Luft- und Raumfahrt - Schutzschalter - Prüfverfahren - Teil 301: Spannungsabfall

Série aérospatiale - Disjoncteurs - Méthodes d'essais - Partie 301 : Chute de tension

Aeronavtika - Odklopniki - Preskusne metode - 301. del: Padec napetosti

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 3841-301:2004 - Aerospace series - Circuit breakers - Test methods - Part 301: Voltage drop

Overview

EN 3841-301:2004 is a European aerospace standard that specifies a test method for verifying the voltage drop of circuit breakers used in aircraft and aerospace electrical systems. Intended as part of the AECMA/CEN aerospace series, this document defines how to measure voltage drop across main and signal contacts to confirm compliance with the corresponding product standard. It is to be used together with EN 3841-100 (General test methods).

Key topics and requirements

• Scope: Method for measuring voltage drop between input and output terminals of each pole of a circuit breaker.
• Reference: Must be applied in conjunction with EN 3841-100 and the applicable product technical specification (product standard).
• Main contacts - rated current test
  • Circuit breaker must carry its rated current for a minimum of 30 minutes to reach thermal stabilization.
  • Voltage drop measured between input and output terminal of each pole.
  • Six measurements per pole: each measurement interrupted by one manual break and one manual make operation.
  • Requirement: Mean of the six measurements shall not exceed the value specified in the product standard.
• Main contacts - low current test
  • Performed on breakers not previously electrically tested.
  • Loaded with the low (DC-only) current specified in the product standard.
  • Measurements after 1 minute stabilization.
  • Six measurements per pole; for DC tests the current direction is reversed after three measurements.
  • Mean value requirement as above.
• Signal contacts
  • Loaded with currents and voltages indicated in the technical specification.
  • Six measurements per contact; for non‑polarized DC signal contacts invert current direction after three measurements.
  • Same mean-value requirement applies.

Applications and who uses it

• Aerospace manufacturers and suppliers - to validate circuit breaker performance during design, production and incoming inspection.
• Test laboratories and quality engineers - for routine acceptance testing and traceable verification of contact voltage drop.
• Avionics and electrical system engineers - to ensure circuit breakers meet thermal and electrical performance criteria that affect system reliability and safety.
• Certification and procurement teams - to reference standardized test methods in specifications, procurement documents and certification evidence.

Practical benefits include preventing excessive contact resistance, avoiding local heating and ensuring consistent operation of aircraft circuit protection devices.

Related standards

• EN 3841-100 - Aerospace series: Circuit breakers - Test methods - Part 100: General (normative reference).
• Applicable product standards / technical specifications - provide the pass/fail voltage drop values and loading conditions required by EN 3841-301.

Keywords: EN 3841-301, voltage drop, circuit breakers, aerospace circuit breaker testing, aerospace series, test methods, EN 3841-100, aircraft circuit breakers.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2005
Aeronavtika - Odklopniki - Preskusne metode - 301. del: Padec napetosti
Aerospace series - Circuit breakers - Test methods - Part 301: Voltage drop
Luft- und Raumfahrt - Schutzschalter - Prüfverfahren - Teil 301: Spannungsabfall
Série aérospatiale - Disjoncteurs - Méthodes d'essais - Partie 301 : Chute de tension
Ta slovenski standard je istoveten z: EN 3841-301:2004
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 3841-301
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2004
ICS 49.060
English version
Aerospace series - Circuit breakers - Test methods - Part 301:
Voltage drop
Série aérospatiale - Disjoncteurs - Méthodes d'essais - Luft- und Raumfahrt - Schutzschalter - Prüfverfahren - Teil
Partie 301 : Chute de tension 301: Spannungsabfall
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 3841-301:2004: E
worldwide for CEN national Members.

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

Foreword
This document (EN 3841-301:2004) has been prepared by the European Association of Aerospace
Manufacturers - Standardization (AECMA-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of
AECMA, prior to its presentation to CE
...