SIST EN 2591-704:2004

Aerospace series - Elements of electrical and optical connection - Test methods - Part 704: Electrical elements - Measurement of turns ratio on a transformer used in a coupler

This standard specifies a method of measuring the turns ratio of a transformer used in a coupler. This method allows also for verification of the input and output voltage phase.
It shall be used together with EN 2591-100.

Luft- und Raumfahrt - Elektrische und optische Verbindungselemente - Prüfverfahren - Teil 704: Elektrische Elemente - Messung des Windungsverhältnisses eines Koppelübertragers in einem Koppler

Diese Norm legt ein Verfahren zum Messen des Windungsverhältnisses des in einem Koppler verwendeten Koppelübertragers fest. Mit diesem Verfahren kann auch die Phasenlage der Ein- und Ausgangsspannung überprüft werden.
Sie ist in Verbindung mit EN 2591-100 anzuwenden.

Série aérospatiale - Organes de connexion électrique et optique - Méthodes d'essais - Partie 704 : Organes électriques - Mesure du rapport des spires sur un transformateur utilisé dans un coupleur

La présente norme spécifie une méthode de mesure du rapport des spires sur un transformateur utilisé dans un coupleur. Cette méthode permet aussi de vérifier la phase des tensions d'entrée et de sortie.
Elle doit être utilisée conjointement avec EN 2591-100.

Aerospace series - Elements of electrical and optical connection - Test methods - Part 704: Electrical elements - Measurement of turns ratio on a transformer used in a coupler

General Information

• Status: Published
• Publication Date: 30-Apr-2004
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: I08 - Imaginarni 08
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-May-2004
• Due Date: 01-May-2004
• Completion Date: 01-May-2004
• Ref Project: EN 2591-704:2001 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 704: Electrical elements - Measurement of turns ratio on a transformer used in a coupler

Relations

• Refers: SIST EN 2591-100:2024 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 100: General
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-076:2020 - Aerospace series - Electrical contacts used in elements of connection - Part 076: Contacts, electrical, male, type A, crimp, class R - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3660-012:2008 - Aerospace series - Cable outlet accessories for circular and rectangular electrical and optical connectors - Part 012: Grommet nut, style A for EN 3372 - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-024:2009 - Aerospace series - Electrical contacts used in elements of connection - Part 024: Contacts, electrical, triaxial, size 8, male, type D, crimp, class S - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-071:2019 - 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: SIST EN 4644-001:2012 - 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: SIST EN 3660-004:2023 - Aerospace series - Cable outlet accessories for circular and rectangular electrical and optical connectors - Part 004: Cable outlet, style A, straight, unsealed with clamp strain relief - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-077:2020 - Aerospace series - Electrical contacts used in elements of connection - Part 077: Contacts, electrical, female, type A, crimp, class R - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-076:2012 - Aerospace series - Electrical contacts used in elements of connection - Part 076: Contacts, electrical, male, type A, crimp, class R - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 4639-102:2008 - Aerospace series - Connectors, optical, rectangular, modular, multicontact, 1,25 diameter ferrule, with removable alignment sleeve holder - Part 102: Optical contact for cable EN 4641-102 - Operating temperatures between - 55 °C and 100 °C - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-081:2019 - Aerospace series - Electrical contacts used in elements of connection - Part 081: Contacts size 22 for EN 2997, electrical, female, type A, crimp, class T - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3646-001:2009 - Aerospace series - Connectors, electrical, circular, bayonet coupling, operating temperature 175 °C or 200 °C continuous - Part 001: Technical specification
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-071:2008 - 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: SIST EN 3155-017:2009 - Aerospace series - Electrical contacts used in elements of connection - Part 017: Contacts, electrical, relay base, female, type A, crimp, class P - Product standard
• Effective Date: 28-Jan-2026
• Referred By: SIST EN 3155-027:2019 - Aerospace series - Electrical contacts used in elements of connection - Part 027: Contacts, electrical, female, type A, crimp, class R - Product standard
• Effective Date: 28-Jan-2026

Overview

SIST EN 2591-704:2004 is a European standard developed for the aerospace sector, focusing on the measurement of the turns ratio of transformers used in couplers. As part of the broader EN 2591 series, this standard ensures that electrical and optical connection elements meet the stringent requirements necessary for aerospace applications. The document establishes a standardized test method not only for measuring turns ratio but also for verifying the input and output voltage phase relationship of these vital components.

Standardization of test methods such as those described in SIST EN 2591-704:2004 contributes to the reliability, safety, and performance of aerospace electrical systems by providing consistent, repeatable, and verifiable procedures.

Key Topics

• Turns Ratio Measurement: Describes a uniform method using specific equipment (signal generator and oscilloscope) for determining the turns ratio of transformers within couplers.
• Voltage Phase Verification: Allows verification that the input and output voltages are in phase, a critical parameter for transformer reliability in aerospace use.
• Testing Procedure: Outlines the preparation of specimens, the required test conditions (such as test temperature and voltage), and the use of sinusoidal signals at specified frequencies.
• Consistency in Aerospace Electrical Testing: Ensures that all transformers used in couplers across the aerospace industry are evaluated with the same methodology, enabling comparable and reliable results.
• Reference to EN 2591-100: This test standard should be used in conjunction with the general requirements outlined in EN 2591-100, which provides context and common procedures for electrical and optical connector testing in aerospace systems.

Applications

SIST EN 2591-704:2004 is widely applicable in the aerospace industry wherever transformers are incorporated into couplers as part of electrical or electronic systems, such as:

• Quality Control: Used by manufacturers and suppliers to ensure transformers meet technical and performance specifications prior to installation in aerospace systems.
• Product Development: Provides engineers with a reliable framework for validating new designs of coupler transformers.
• Compliance and Certification: Enables organizations to demonstrate compliance with European and international aerospace standards, which is critical for market access and procurement by aerospace OEMs.
• Maintenance and Inspection: Aerospace operators can use this standard as part of routine inspection or troubleshooting to verify ongoing reliability of electrical connections involving transformers.

By standardizing testing procedures, aerospace companies benefit from improved component reliability, reduced risk of system failure, and alignment with regulatory and industry expectations.

Related Standards

Several other international standards relate to or complement the requirements of SIST EN 2591-704:2004:

• EN 2591 Series: A comprehensive suite of standards covering test methods for elements of electrical and optical connections in the aerospace sector.
• EN 2591-100: General guidelines for preparing specimens and carrying out tests on electrical and optical connection elements - essential for use alongside Part 704.
• Other Parts of EN 2591: Addressing further test methods (mechanical, environmental, climatic) for connection elements, ensuring a holistic approach to quality and safety in aerospace electrical systems.

For aerospace organizations, adherence to these standards ensures compatibility and reliability across equipment and systems, supporting best practices in engineering, quality assurance, and safety management.

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By implementing SIST EN 2591-704:2004, aerospace companies reinforce system dependability, align with European best practices, and uphold the highest standards for electrical testing in critical aircraft systems.

Standards Content (Sample)

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 704: Electrical elements - Measurement of turns ratio on a transformer used in a couplerLuft- und Raumfahrt - Elektrische und optische Verbindungselemente - Prüfverfahren - Teil 704: Elektrische Elemente - Messung des Windungsverhältnisses eines Koppelübertragers in einem KopplerSérie aérospatiale - Organes de connexion électrique et optique - Méthodes d'essais - Partie 704 : Organes électriques - Mesure du rapport des spires sur un transformateur utilisé dans un coupleurAerospace series - Elements of electrical and optical connection - Test methods - Part 704: Electrical elements
- Measurement of turns ratio on a transformer used in a coupler49.060Aerospace electric equipment and systemsICS:Ta slovenski standard je istoveten z:EN 2591-704:2001SIST EN 2591-704:2004en01-maj-2004SIST EN 2591-704:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 2591-704November 2001ICS 49.060English versionAerospace series - Elements of electrical and optical connection- Test methods - Part 704: Electrical elements - Measurement ofturns ratio on a transformer used in a couplerSérie aérospatiale - Organes de connexion électrique etoptique - Méthodes d'essais - Partie 704: Organesélectriques - Mesure du rapport des spires sur untransformateur utilisé dans un coupleurLuft- und Raumfahrt - Elektrische und optischeVerbindungselemente - Prüfverfahren - Teil 704:Elektrische Elemente - Messung desWindungsverhältnisses eines Koppelübertragers in einemKopplerThis European Standard was approved by CEN on 4 June 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR
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