SIST EN 3662-005:2009
(Main)Aerospace series - Circuit breakers, three-pole, temperature compensated, rated current 20 A to 50 A - Part 005: With polarized signal contact - Product standard
Aerospace series - Circuit breakers, three-pole, temperature compensated, rated current 20 A to 50 A - Part 005: With polarized signal contact - Product standard
This standard specifies the characteristics of three-pole circuit breakers, temperature compensated with a rated current from 20 A to 50 A, used in aircraft on-board circuits at a temperature between 55 °C and 90 °C and at an altitude of 15 000 m max.
These circuit breakers are operated by a push-pull type single push button (actuator), with delayed action
"trip-free" tripping with a polarized signal contact which is open when main contacts are closed, and inversely.
They will continue to function up to the short-circuit current.
Luft- und Raumfahrt - Schutzschalter, dreipolig, Temperaturkompensiert, Nennströme von 20 A bis 50 A - Teil 005: Mit polarisiertem Signalkontakt - Produktnorm
Diese Norm legt die Eigenschaften von dreipoligen, temperaturkompensierten Schutzschaltern mit Nennströmen von 20 A bis 50 A fest, die in Luftfahrzeug Bordnetzen im Temperaturbereich zwischen –55 °C und 90 °C sowie bei einer maximalen Höhenlage von 15 000 m verwendet werden.
Diese Schutzschalter besitzen einen Druckknopf (Betätigungsknopf) mit Druck Zug Betätigung mit Freiaus¬lösung und verzögerter Auslösefunktion und einen polarisierten Signalkontakt, der bei geschlossenen Haupt¬kontakten geöffnet ist und umgekehrt.
Ihre Funktion ist bis zum Kurzschlussstrom sichergestellt.
Série aérospatiale - Disjoncteurs tripolaires compensés en température, intensités nominales 20 A à 50 A - Partie 005 : Avec contact de signalisation polarisé - Norme de produit
Aeronavtika - Odklopniki, tripolni, temperaturno kompenzirani, nazivni tok od 20 A do 50 A - 005. del: S polariziranim signalnim kontaktom - Standard za proizvod
General Information
- Status
- Published
- Publication Date
- 27-Apr-2009
- Technical Committee
- I13 - Imaginarni 13
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 16-Apr-2009
- Due Date
- 21-Jun-2009
- Completion Date
- 28-Apr-2009
Overview
SIST EN 3662-005:2009 is a European product standard developed by CEN for aerospace circuit breakers. It focuses on three-pole, temperature compensated circuit breakers with rated currents ranging from 20 A to 50 A. These circuit breakers are specifically designed for use in aircraft on-board electrical systems, operating reliably in harsh conditions including temperatures between −55 °C and 90 °C, and altitudes up to 15,000 meters.
The circuit breakers feature a push-pull single push-button actuator with delayed action, incorporating a "trip-free" tripping mechanism and a polarized signal contact. This signal contact is open when the main contacts are closed, and vice versa, enhancing circuit monitoring capabilities. The design ensures continued operation even under short-circuit conditions, meeting stringent aerospace electrical performance criteria.
Key Topics
- Temperature Compensation: Circuit breakers maintain stable operating characteristics across wide temperature variations typical in aerospace environments.
- Rated Current Range: Standard covers devices rated from 20 A to 50 A, suitable for a variety of aircraft power distribution needs.
- Polarized Signal Contact: Provides clear indication of breaker status-open when main contacts are closed-enabling effective system diagnostics.
- Mechanical and Electrical Specifications:
- Operated by push-pull type actuator with delayed "trip-free" tripping.
- Capable of withstanding high short-circuit currents.
- Complies with vibration, shock, humidity, corrosion, and contaminant resistance tests.
- Installation and Hardware:
- Defined dimensional standards for panel mounting and hardware compatibility.
- Recommended tightening torques and specialized insertion/extraction tools ensure secure and maintainable connections.
- Electrical Characteristics:
- Nominal voltages of 115/200 V AC at frequencies between 360 Hz and 800 Hz.
- Signal contacts rated for 28 V DC with specific voltage drop and current limits.
- Endurance and Safety Testing:
- Proven mechanical and electrical endurance through tens of thousands of operations.
- Designed to meet dielectric rigidity standards at both ground level and elevated altitudes, ensuring insulation integrity.
- Marking and Identification: Includes clear manufacturer details, electrical diagram, rated current, and production date for traceability.
Applications
SIST EN 3662-005:2009 circuit breakers are optimized for aerospace applications, including:
- Power distribution in commercial and military aircraft on-board electrical systems.
- Protection of critical three-phase loads where reliable trip-free functionality is essential.
- Systems requiring precise trip indication via polarized signal contacts to integrate with aircraft monitoring and warning systems.
- Environments subject to extreme temperature fluctuations, high altitudes, vibration, shock, and corrosive conditions.
- Installation in aircraft panels where standard dimensions and hardware ensure compatibility and ease of maintenance.
This standard ensures that circuit breakers used in aerospace meet the highest safety and reliability standards required for complex electrical systems operating under severe environmental and operational stresses.
Related Standards
- EN 3662-001: Technical specification for three-pole, temperature compensated circuit breakers rated 20–50 A, serving as a core reference for detailed performance criteria.
- EN 3155-016: Standard for electrical contacts used in aerospace connectors, relevant for terminals of circuit breakers.
- EN 6113: Specifies connecting and attachment hardware to be used with circuit breakers.
- EN 3841-305: Test methods for short-circuit performance in aerospace circuit breakers.
- TR 6083: Guidelines for installation cut-outs of electrical components, aiding proper panel integration.
- MIL-SPECs such as MIL-I-81969 and MIL-S-19500: Military standards referenced for installation tools and semiconductor diode quality assurance.
By adhering to SIST EN 3662-005:2009 and its related standards, manufacturers and aerospace engineers can ensure high-performance, durable, and safe circuit breakers that meet international aerospace operational demands.
Keywords: EN 3662-005, aerospace circuit breakers, three-pole circuit breaker, temperature compensated, rated current 20A to 50A, polarized signal contact, aircraft electrical systems, trip-free tripping, aviation standard, aircraft circuit protection, CEN aerospace standard, electrical reliability in aviation.
Frequently Asked Questions
SIST EN 3662-005:2009 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Circuit breakers, three-pole, temperature compensated, rated current 20 A to 50 A - Part 005: With polarized signal contact - Product standard". This standard covers: This standard specifies the characteristics of three-pole circuit breakers, temperature compensated with a rated current from 20 A to 50 A, used in aircraft on-board circuits at a temperature between 55 °C and 90 °C and at an altitude of 15 000 m max. These circuit breakers are operated by a push-pull type single push button (actuator), with delayed action "trip-free" tripping with a polarized signal contact which is open when main contacts are closed, and inversely. They will continue to function up to the short-circuit current.
This standard specifies the characteristics of three-pole circuit breakers, temperature compensated with a rated current from 20 A to 50 A, used in aircraft on-board circuits at a temperature between 55 °C and 90 °C and at an altitude of 15 000 m max. These circuit breakers are operated by a push-pull type single push button (actuator), with delayed action "trip-free" tripping with a polarized signal contact which is open when main contacts are closed, and inversely. They will continue to function up to the short-circuit current.
SIST EN 3662-005:2009 is classified under the following ICS (International Classification for Standards) categories: 49.060 - Aerospace electric equipment and systems. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 3662-005:2009 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aeronavtika - Odklopniki, tripolni, temperaturno kompenzirani, nazivni tok od 20 A do 50 A - 005. del: S polariziranim signalnim kontaktom - Standard za proizvodLuft- und Raumfahrt - Schutzschalter, dreipolig, Temperaturkompensiert, Nennströme von 20 A bis 50 A - Teil 005: Mit polarisiertem Signalkontakt - ProduktnormSérie aérospatiale - Disjoncteurs tripolaires compensés en température, intensités nominales 20 A à 50 A - Partie 005 : Avec contact de signalisation polarisé - Norme de produitAerospace series - Circuit breakers, three-pole, temperature compensated, rated current 20 A to 50 A - Part 005: With polarized signal contact - Product standard49.060Aerospace electric equipment and systemsICS:Ta slovenski standard je istoveten z:EN 3662-005:2006SIST EN 3662-005:2009en,de01-junij-2009SIST EN 3662-005:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3662-005August 2006ICS 49.060 English VersionAerospace series - Circuit breakers, three-pole, temperaturecompensated, rated current 20 A to 50 A - Part 005: Withpolarized signal contact - Product standardSérie aérospatiale - Disjoncteurs tripolaires compensés entempérature, intensités nominales 20 A à 50 A - Partie 005: Avec contact de signalisation polarisé - Norme de produitLuft- und Raumfahrt - Schutzschalter, dreipolig,Temperaturkompensiert, Nennströme von 20 A bis 50 A -Teil 005: Mit polarisiertem Signalkontakt - ProduktnormThis European Standard was approved by CEN on 5 June 2006.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 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 translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.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, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3662-005:2006: ESIST EN 3662-005:2009
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