EN 2591-304:1997

• Abstract:

  This standard specifies a method of assessing the ability of elements of connection to be stored and to function under conditions of steady state damp heat. It shall be used together with EN 2591.

• Status: Published
• Publication Date: 21-Oct-1997
• Withdrawal Date: 29-Apr-1998
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 2 - Electrical
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 30-Jun-2017
• Completion Date: 23-Sep-2026
• Ref Project: SIST EN 2591-304:2001 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 304: Damp heat steady state

• Refers: EN 2591-201:1996 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 201: Contact resistance - Low level
• Effective Date: 28-Jan-2026
• Refers: EN 2591-202:1996 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 202: Contact resistance at rated current
• Effective Date: 28-Jan-2026
• Refers: EN 2591-207:1996 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 207: Voltage proof test
• Effective Date: 28-Jan-2026
• Refers: EN 2591:1992 - Aerospace series - Elements of electrical and optical connection - Test methods - General
• Effective Date: 28-Jan-2026
• Refers: EN 2591-101:1994 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 101: Visual examination
• Effective Date: 28-Jan-2026
• Refers: EN 2591-408:1998 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 408: Mating and unmating forces
• Effective Date: 28-Jan-2026
• Refers: EN 2591-206:1996 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 206: Measurement of insulation resistance
• Effective Date: 28-Jan-2026
• Referred By: EN 4531-101:2012 - Aerospace series - Connectors, optical, circular, single and multipin, coupled by triple start threaded ring - Flush contacts - Part 101: Optical contact for EN 4641-100 cable - 55 °C to 125 °C - Product standard
• Effective Date: 28-Jan-2026
• Referred By: EN 4644-001:2017 - Aerospace series - Connector, electrical and optical, rectangular, modular, rectangular inserts, operating temperature 175 °C (or 125 °C) continuous - Part 001: Technical specification
• Effective Date: 28-Jan-2026
• Referred By: EN 3155-045:2019 - Aerospace series - Electrical contacts used in elements of connection - Part 045: Contacts, electrical, female, type A, double crimping, class T - Product standard
• Effective Date: 28-Jan-2026
• Referred By: EN 3733-001:2009 - Aerospace series - Connector, optical, circular, single channel, coupled by self-locking ring, operating temperature up to 150 °C continuous - Part 001: Technical specification
• Effective Date: 28-Jan-2026
• Referred By: EN 3155-071:2007 - Aerospace series - Electrical contacts used in elements of connection - Part 071: Contacts, electrical, female, type A, crimp, class S - Product standard
• Effective Date: 28-Jan-2026
• Referred By: EN 3155-012:2006 - Aerospace series - Electrical contacts used in elements of connection - Part 012: Contacts, electrical, triaxial, size 8, male, type D, solder, class R - Product standard
• Effective Date: 28-Jan-2026
• Referred By: EN 3155-083:2019 - Aerospace series - Electrical contacts used in elements of connection - Part 083: Contact, electrical, female, type A, crimp, class S, size 8 - Product standard
• Effective Date: 28-Jan-2026
• Referred By: EN 3155-008:2019 - Aerospace series - Electrical contacts used in elements of connection - Part 008: Contacts, electrical, male, type A, crimp, class S - Product standard
• Effective Date: 28-Jan-2026

Overview

EN 2591-304:1997 - "Aerospace series - Elements of electrical and optical connection - Test methods - Part 304: Damp heat steady state" (adopted as SIST EN 2591-304:2001) is a CEN standard that specifies a method to assess the ability of electrical and optical connection elements to be stored and to function under steady-state damp heat. It is intended to be used in conjunction with the general EN 2591 series test methods and forms part of the aerospace qualification toolkit for connectors and interconnect components.

Key Topics

• Scope and applicability: Defines the intended use for elements of electrical and optical connection within aerospace equipment where long-term exposure to humid environments is a concern.
• Test purpose: Provides a method to evaluate whether connectors and related components retain storage integrity and operational function after exposure to steady-state damp heat.
• Test relationships: Designed to be used together with the broader EN 2591 family (general test rules and complementary parts).
• Standard adoption: Recognized and published within national bodies (e.g., SIST EN 2591-304:2001), reflecting European harmonization for aerospace connector testing.

Note: EN 2591-304:1997 defines the test method framework. For procedural details, conditioning steps, acceptance criteria and measurement methods, refer to the associated EN 2591 parts and the full text of this part.

Applications

• Aerospace manufacturers and system integrators evaluating the environmental robustness of electrical and optical connectors.
• Supplier qualification and component acceptance testing for aircraft, spacecraft and airborne systems operating in humid climates.
• Environmental and qualification test laboratories that conduct standard-compliant connector tests.
• Quality assurance and reliability engineers establishing test plans for interconnects subject to damp environments.

Using EN 2591-304 helps organizations demonstrate that connector elements can be safely stored and will continue to function after exposure to damp heat, supporting product reliability, safety and regulatory compliance.

Related Standards

• EN 2591 (other parts) - general methods and complementary test procedures for elements of electrical and optical connection.
• National adoptions (e.g., SIST EN 2591-304:2001) - indicate harmonized use across member countries.

Keywords: EN 2591-304:1997, damp heat steady state, aerospace connectors, test methods, elements of electrical and optical connection, CEN standard, connector environmental testing, aerospace qualification.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Elements of electrical and optical connection - Test methods - Part 304: Damp heat steady stateLuft- und Raumfahrt - Elektrische und optische Verbindungselemente - Prüfverfahren - Teil 304: Dauerprüfung bei feuchter WärmeSérie aérospatiale - Organes de connexion électrique et optique - Méthodes d'essais - Partie 304: Essai continu
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