SIST EN 3841-302:2005

Aerospace series - Circuit breakers - Test methods - Part 302: Insulation resistance

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

Luft- und Raumfahrt - Schutzschalter - Prüfverfahren - Teil 302: Isolationswiderstand

Série aérospatiale - Disjoncteurs - Méthodes d'essais - Partie 302 : Résistance d'isolement

La présente norme spécifie une méthode pour vérifier la résistance d'isolement.
Elle doit être utilisée conjointement avec EN 3841-100.

Aeronavtika - Odklopniki - Preskusne metode - 302. del: Izolacijska upornost

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 3841-302:2004 - Aerospace series - Circuit breakers - Test methods - Part 302: Insulation resistance

Overview

SIST EN 3841-302:2005 is a European standard developed by the European Association of Aerospace Manufacturers (AECMA-STAN) and ratified by CEN. It defines a specific test method for verifying the insulation resistance of aerospace circuit breakers. The standard is part of the broader EN 3841 series and is intended to be used in conjunction with EN 3841-100, which covers general test methods for circuit breakers in the aerospace sector. Insulation resistance testing is critical for ensuring the electrical safety and reliability of circuit breakers used in aerospace systems.

Key Topics

• Insulation Resistance Measurement: Specifies the procedure to measure insulation resistance at a test voltage of 500 V DC.
• Test Conditions: Testing is conducted after stabilization of temperature and pressure, reflecting real operating environments.
• Measurement Points:
  • With the circuit breaker in the closed (on) position:
    • Between terminals of each pole and all other connections including signal contacts.
    • Between all connections (including signal contacts) and earth (mounting).
  • With the circuit breaker in the open (off) position:
    • Between each connection and all other connections including signal contacts.
    • Between all connections and earth.
• Compliance Requirements: The insulation resistance values must meet the defined thresholds per the technical specification for all permissible temperatures at ground level.

Applications

SIST EN 3841-302:2005 is specifically used in the aerospace industry for quality assurance and maintenance verification of circuit breakers. Proper insulation resistance ensures:

• Electrical safety: Prevents leakage currents and reduces risks of electrical faults.
• Reliability: Maintains circuit breaker functionality under varied environmental conditions typical of aerospace operations.
• System Integrity: Supports the overall safety and performance of aerospace electrical systems by confirming circuit breakers meet rigorous testing standards.

This standard applies to manufacturers, aerospace engineers, quality control personnel, and maintenance teams tasked with ensuring the performance and compliance of aerospace electrical components.

Related Standards

• EN 3841-100: Aerospace series - Circuit breakers - Test methods - Part 100: General test procedures.
• Other parts of the EN 3841 series covering various test methods related to aerospace circuit breakers.
• CEN and CENELEC standards related to electrical safety and aerospace equipment testing.

By adhering to SIST EN 3841-302:2005 alongside complementary standards, aerospace organizations ensure a harmonized and robust approach to circuit breaker testing, supporting safer aircraft electrical infrastructures.

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Keywords: SIST EN 3841-302:2005, insulation resistance, aerospace circuit breakers, circuit breaker test methods, aerospace electrical safety, insulation resistance measurement, aerospace standards, EN 3841-100, circuit breaker quality assurance, electrical system reliability.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2005
Aeronavtika - Odklopniki - Preskusne metode - 302. del: Izolacijska upornost
Aerospace series - Circuit breakers - Test methods - Part 302: Insulation resistance
Luft- und Raumfahrt - Schutzschalter - Prüfverfahren - Teil 302: Isolationswiderstand
Série aérospatiale - Disjoncteurs - Méthodes d'essais - Partie 302 : Résistance
d'isolement
Ta slovenski standard je istoveten z: EN 3841-302:2004
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 3841-302
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2004
ICS 49.060
English version
Aerospace series - Circuit breakers - Test methods - Part 302:
Insulation resistance
Série aérospatiale - Disjoncteurs - Méthodes d'essais - Luft- und Raumfahrt - Schutzschalter - Prüfverfahren - Teil
Partie 302 : Résistance d'isolement 302: Isolationswiderstand
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 3841-302:2004: E
worldwide for CEN national Members.

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