SIST EN 3774-001:2015
(Main)Aerospace series - Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A - Part 001: Technical specification
Aerospace series - Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A - Part 001: Technical specification
This European Standard specifies the three-pole temperature compensated circuit breakers, rated from 1 A to 25 A used in aircraft on-board circuits. It describes specific environmental, electrical and mechanical characteristics and the stringency of tests to be applied according to test methods of EN 3841-100.
These circuit breakers are intended for use in aircraft with electrical supplies in accordance with EN 2282.
Luft- und Raumfahrt - Schutzschalter, dreipolig, temperaturkompensiert, Nennströme von 1 A bis 25 A - Teil 001: Technische Lieferbedingungen
Série aérospatiale - Disjoncteurs tripolaires compensés en température, intensités nominales 1 A à 25 A - Partie 001 : Spécification technique
Aeronavtika - Odklopniki, tripolni, temperaturno kompenzirani, naznačeni tok od 1 A do 25 A - 001. del: Tehnična specifikacija
Ta evropski standard določa tripolne temperaturno kompenzirane odklopnike z naznačenim tokom od 1 A do 25 A, ki se uporabljajo v letalskih vezjih. Opisuje posebne okoljske, električne in mehanske lastnosti ter strogost preskusov, ki se uporabljajo v skladu s preskusnimi metodami iz standarda EN 3841-100.
Ti odklopniki so namenjeni uporabi v letalskih plovilih z električno oskrbo v skladu s standardom EN 2282.
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Schutzschalter, dreipolig, temperaturkompensiert, Nennströme von 1 A bis 25 A - Teil 001: Technische LieferbedingungenSérie aérospatiale - Disjoncteurs tripolaires compensés en température, intensités nominales 1 A à 25 A - Partie 001 : Spécification techniqueAerospace series - Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A - Part 001: Technical specification49.060Aerospace electric equipment and systemsICS:Ta slovenski standard je istoveten z:EN 3774-001:2014SIST EN 3774-001:2015en,fr,de01-januar-2015SIST EN 3774-001:2015SLOVENSKI
STANDARDSIST EN 3774-001:20021DGRPHãþD
SIST EN 3774-001:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3774-001
October 2014 ICS 49.060 Supersedes EN 3774-001:1999English Version
Aerospace series - Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A - Part 001: Technical specification
Série aérospatiale - Disjoncteurs tripolaires compensés en température, intensités nominales 1 A à 25 A - Partie 001 : Spécification technique
Luft- und Raumfahrt - Schutzschalter, dreipolig, temperaturkompensiert, Nennströme von 1 A bis 25 A - Teil 001: Technische Lieferbedingungen This European Standard was approved by CEN on 12 October 2013.
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 CEN-CENELEC 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 translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3774-001:2014 ESIST EN 3774-001:2015
EN 3774-001:2014 (E) 2 Contents Page Foreword .3 1 Scope .4 2 Normative references .4 3 Terms and definitions .4 4 Description .4 5 Design .5 6 Characteristics .6 7 Tests .7 8 Qualification tests . 15 9 Quality assurance . 19 10 Marking . 19 11 Delivery conditions . 19 12 Packaging . 19 13 Storage . 19
SIST EN 3774-001:2015
EN 3774-001:2014 (E) 3 Foreword This document (EN 3774-001:2014) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-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 ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2015, and conflicting national standards shall be withdrawn at the latest by April 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 3774-001:1999. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 3774-001:2015
EN 3774-001:2014 (E) 4 1 Scope This European Standard specifies the three-pole temperature compensated circuit breakers, rated from 1 A to 25 A used in aircraft on-board circuits. It describes specific environmental, electrical and mechanical characteristics and the stringency of tests to be applied according to test methods of EN 3841-100. These circuit breakers are intended for use in aircraft with electrical supplies in accordance with EN 2282. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2083, Aerospace series — Copper or copper alloy conductors for electrical cables — Product standard EN 2282, Aerospace series — Characteristics of aircraft electrical supplies EN 2825, Aerospace series — Burning behaviour of non-metallic materials under the influence of radiating heat and flames — Determination of smoke density EN 2826, Aerospace series — Burning behaviour of non-metallic materials under the influence of radiating heat and flames — Determination of gas components in the smoke
EN 3841-100 (all parts), Aerospace series — Circuit breakers — Test Methods — Part 100: General EN 3844-1, Aerospace series — Flammability of non metallic materials — Part 1: Small burner test, vertical — Determination of the vertical flame propagation EN 9133, Aerospace series — Quality management systems — Qualification procedure for aerospace standard parts TR 6083, Aerospace series — Cut-outs for installation of electrical components 1) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 3841-100 apply. 4 Description These circuit breakers are operated by a "push-pull" type single push button (actuator) and with delayed action "trip-free" tripping. Their function is assured up to the short-circuit current.
1) Published as ASD-STAN Technical Report at the date of publication of this standard. http://www.asd-stan.org/ SIST EN 3774-001:2015
EN 3774-001:2014 (E) 5 5 Design 5.1 Materials 5.1.1 Metallic materials All metallic parts shall be resistant to corrosion or finished against corrosion. When dissimilar materials are in close contact, an adequate protection against corrosion shall be used so that the electromotive force of the galvanic couple does not exceed 0,25 V. When bimetals are used, an eventual corrosion shall not affect the good operation of the circuit breaker. 5.1.2 Insulation materials The insulating parts shall be made of auto-extinguishing or non-flammable materials; they shall not emit damaging or explosive vapours, even in presence of fire or internal electric arc. They shall be insensitive to moulds and micro-organisms action. Application of any material or protective coating, which might crack, break on flake shall be forbidden. Materials which are not specified or which are not specially described shall be as light as possible for the requested use. Materials shall be selected according to security criteria (toxicity, smoke density) as defined in contractual documents. 5.2 Design 5.2.1 Insulating box The insulating box shall integrate besides the mechanism, the connection and attachment unit. 5.2.2 Free release mechanism Design of circuit breaker mechanism shall allow free release; i.e. the circuit breaker cuts out in case of overload, and remains cut out even if the actuator is kept by force in engaged position. A new engagement of circuit breaker is only possible after a first total release of the control actuator. The operation in these conditions shall not affect further performances of the circuit breaker. 5.2.3 Attachment All visible parts shall be black colored and non-reflective. 5.2.4 Electrical connection units They shall be able to receive the lugs. 5.2.5 Control actuator In engaged position, the visible part of the control actuator shall be of the colour stated in the product standard. In disengaged (or opened) position, the control actuator shall show a white strip. SIST EN 3774-001:2015
EN 3774-001:2014 (E) 6 The outer part of this actuator shall be isolated from all undervoltage parts. The control actuator shall not stay in a transition position, or give a false indication about the circuit breaker condition. It shall not be removable. When pushing it, power contacts of the circuit breaker engage. When pulling it, power contacts of the circuit breaker open. The circuit breaker rating is indicated in indelible white colour on the front part of the control actuator. The product standard gives the digits positioning. 5.2.6 Rating inviolability The circuit breaker shall be designed in such a way that the calibration unit cannot be reached without breaking a sealing. 5.2.7 Clearances and creepage distances The clearances, creepage distances and the minimal space to be foreseen between the energized parts and any other part of the circuit breaker made of conductive material, as well as between the energized parts of opposite polarity, shall be sufficient to avoid any default or arcing in all uses and climatic conditions. 5.2.8 Protection against non-release Electrical overload happening on a circuit breaker locked in its engaged position (sticked contacts or non-operating release mechanism), shall cause the opening of the circuit by circuit breaker destruction without any fire or important smoke release. 6 Characteristics 6.1 General characteristics See Table 1. Table 1 — General characteristics Designation Requirements Assembly See product standard. Mass See product standard. Operational altitude See product standard. 3 input terminals on power supply side (identified by digit A1, B1, C1) See product standard. 3 output terminals on distribution side (identified by digit A2, B2, C2) Operational ambient temperatures limits From − 55 °C to 125 °C Temperature compensation Rating 1 A to 15 A From − 55 °C to 125 °C See product
standard. Rating 20 A and 25 A From − 55 °C to 90 °C Rating marking On control actuator (indelible white)
SIST EN 3774-001:2015
EN 3774-001:2014 (E) 7 6.2 Ratings See product standard. 6.3 Nominal voltage of operational circuits See product standard. 6.4 Dimensional characteristics See product standard. 6.5 Recommended panel mounting dimensions Panel cut-out : The panel cut-out is in accordance with the designation TR6083C202. Spacing : 50 mm horizontal and 30 mm vertical from the centre of the mounting holes. Panel thickness : 1 mm to 3 mm. 7 Tests 7.1 Mechanical tests See Table 2. Table 2 — Mechanical characteristics Tests Requirements Visual check EN 3841-201 Operational force Closing force (push) EN 3841-502 8 N to 80 N Opening force (pull) 5 N to 30 N Mechanical strength Actuator Travel EN 3841-501 For value, see product standard. Transverse load EN 3841-503 ≥ 110 N Longitudinal load Push ≥ 110 N Pull ≥ 110 N Attachment nut Tightening torque EN 3841-504 ≥ 5 N.m Rotation torque ≥ 3 N.m Main contact connection Screw tightening torque EN 3841-505 ≥ 2 N.m Tensile force as per F1 (see Figure 1
in product standard). ≥ 110 N Pressure force as per F2 (see Figure 1
in product standard). ≥ 55 N
SIST EN 3774-001:2015
EN 3774-001:2014 (E) 8 7.2 Environmental tests See Table 3. Table 3 — Environmental conditions (1 of 2) Tests Requirements Combined tests. Ambient temperature 70 °C and vibrations
(see notes). Sinusoidal (see Figure 1). Duration: circuit breaker in the "closed" position; 0,9 Ιn
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