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STANDARD
SIST EN 3662-001:2009
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3662-001August 2006ICS 49.060 English VersionAerospace series - Circuit breakers, three-pole, temperaturecompensated, rated current 20 A to 50 A - Part 001: TechnicalspecificationSérie aérospatiale - Disjoncteurs tripolaires compensés entempérature, intensités nominales 20 A à 50 A - Partie 001: Spécification techniqueLuft- und Raumfahrt - Schutzschalter, dreipolig,Temperaturkompensiert, Nennströme von 20 A bis 50 A -Teil 001: Technische LieferbedingungenThis European Standard was approved by CEN on 10 May 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 3662-001:2006: ESIST EN 3662-001:2009
EN 3662-001:2006 (E) 2 Contents Page Foreword.3 1 Scope.4 2 Normative references.4 3 Terms and definitions.5 4 Description.5 5 Design.5 6 Characteristics.6 7 Tests.8 8 Qualification tests.16 9 Quality assurance.19 10 Marking.19 11 Delivery conditions.20 12 Packaging.20 13 Storage.20
SIST EN 3662-001:2009
EN 3662-001:2006 (E) 3 Foreword This European Standard (EN 3662-001:2006) 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 February 2007, and conflicting national standards shall be withdrawn at the latest by February 2007. 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. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: 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 the United Kingdom.
SIST EN 3662-001:2009
EN 3662-001:2006 (E) 4 1 Scope This standard specifies the three-pole temperature compensated circuit breakers with signal contacts, polarized or not, rated from 20 A to 50 A and 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 (all categories). 2 Normative references The following referenced documents are indispensable for the application of this document. 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.1) 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.1) EN 3662-005, Aerospace series — Circuit breakers, three-pole, temperature compensated, rated current 20 A to 50 A
Part 005: With polarized signal contact — Product standard. EN 3662-006, Aerospace series — Circuit breakers, three-pole, temperature compensated, rated current 20 A to 50 A
Part 006: With polarized signal contact — Bus-bar version — Product standard. EN 3841-100*, 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.1) EN 9133, Aerospace series — Quality management systems — Qualification Procedure for Aerospace Standards Parts. TR 6083, Aerospace series — Cut-outs for installation of electrical components.2) MIL-I-81969/1A, Installing and removal tools, connector electrical contact, type III, class 2, composition C.3) MIL-I-81969/14C, Installing and removal tools, connector electrical contact, type III, class 2, composition B.3) * And all its parts quoted. 1) Published as AECMA Prestandard at the date of publication of this standard. 2) Published as AECMA Technical Report at the date of publication of this standard. 3) Published by: Department of Defense (DOD), the Pentagon, Washington D.C. 20301 USA. SIST EN 3662-001:2009
EN 3662-001:2006 (E) 5 3 Terms and definitions For the purposes of this standard, the terms and definitions given in EN 3841-100 apply. 4 Description These circuit breakers are operated by a "push-pull" type single pushbutton (actuator) and with delayed action "trip-free" tripping. Their function is assured up to the short-circuit current. 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 or 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 coloured and non-reflective. SIST EN 3662-001:2009
EN 3662-001:2006 (E) 6 5.2.4 Electrical connection units They shall be able to receive the lugs (or contacts). 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. The outer part of this actuator shall be isolated from all under voltage 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 and indicating contact opens. When pulling it, power contacts of the circuit breaker open and indicating contact closes. 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 Leakage lines The leakage lines and the minimal space to be foreseen between the under voltage parts and any other part of the circuit breaker made of non-insulating material, as well as between the under voltage parts of opposite polarity, shall be sufficient to avoid any default or arc tracking 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. SIST EN 3662-001:2009
EN 3662-001:2006 (E) 7 Table 1 — General characteristics Designation Requirements Assembly See product standard. Mass See product standard. Operational altitude See product standard. Power contact connection 3 input terminals on power supply side (identified by digit A1, B1, C1) 3 output terminals on distribution side (identified by digit A2, B2, C2) See product standard. Signal contact connection, circuit closed when circuit breaker is on release Crimp contacts size 20 See product standard. Operational ambient temperatures limits From − 55 °C to 90 °C Temperature compensation From − 55 °C to 90 °C See product standard. Rating marking On control actuator (indelible white)
6.2 Ratings See product standard. 6.3 Nominal voltage of main contacts See product standard. 6.4 Signal contact performances See Table 2. Table 2 — Signal contact performances Type of load 28 V d.c. 5 V d.c. 5 V a.c. a 28 V d.c. Resistive ≤ 0,5 A ≥ 3 mA Not used ≥ 3 mA Signal contact Lamp ≤ 0,2 A Not used 0,23 A Not used a Applicable on version without diode only.
NOTE 1 The circuit breaker status signalling function, open or closed shall be guaranteed after all the tests described in this specification. NOTE 2 In order to avoid any deterioration of the signalization circuit (contact and diode), the reception electrical test could be performed without exceeding the value recommended of 60 mW max. at 28 V d.c. max. (resistive load). SIST EN 3662-001:2009
EN 3662-001:2006 (E) 8 6.5 Dimensional characteristics See product standard. 6.6 Recommended panel mounting dimensions Panel cut-out : The panel cut-out is in accordance with the designations TR6083C202 (for EN 3662-005) and TR6083C400 (for EN 3662-006). Spacing : 60 mm horizontal and 45 mm vertical from the centres of the mounting holes. Panel thickness : 1 mm to 3 mm. 7 Tests 7.1 Mechanical tests See Table 3. Table 3 — Mechanical tests Tests Requirements Visual check See EN 3841-201. Closing force (push) 20 N to 80 N Operational force Opening force (pull) See EN 3841-502. 5 N to 45 N Travel See EN 3841-501. For value, see product standard. Transverse load ≥ 110 N Push ≥ 110 N Actuator Longitudinal load Pull See EN 3841-503. ≥ 110 N Tightening torque ≥ 5,5 N.m Attachment nut Rotation torque See EN 3841-504. ≥ 3 N.m Screw tightening torque ≥ 2,5 N.m Tensile force as per F1 (see Figure 1 in product standard). ≥ 110 N Main contact connection Pressure force as per F2 (see Figure 1 in product
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