SIST EN 2756:2010

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aeronavtika - Žarnice - Preskusne metodeLuft- und Raumfahrt - Glühlampen - PrüfverfahrenSérie aérospatiale - Lampes à incandescence - Méthodes d'essaisAerospace series - Lamps, incandescent - Test methods49.060Aerospace electric equipment and systemsICS:Ta slovenski standard je istoveten z:EN 2756:2010SIST EN 2756:2010en01-april-2010SIST EN 2756:2010SLOVENSKI
STANDARD



SIST EN 2756:2010



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 2756
February 2010 ICS 49.060 English Version
Aerospace series - Lamps, incandescent - Test methods
Série aérospatiale - Lampes à incandescence - Méthodes d'essais
Luft- und Raumfahrt - Glühlampen - Prüfverfahren This European Standard was approved by CEN on 26 September 2009.
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 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 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, 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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
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Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2756:2010: ESIST EN 2756:2010



EN 2756:2010 (E) 2 Contents Page Foreword . 31Scope . 42Normative references . 43Tests . 43.1Test conditions . 43.2Visual examination . 43.2.1External appearance . 43.2.2Quality of marking . 53.3Mass and dimensions . 53.4Electrical and photometric tests . 53.4.1General . 53.4.2Homogeneity of filament . 53.4.3Luminous flux at nominal voltage . 53.4.4Luminous flux at reduced voltage . 53.4.5Colour temperature of the filament . 63.4.6Voltage strength and insulation resistance . 63.4.7Life . 73.5Mechanical tests . 103.5.1Test support . 103.5.2Vibration resistance test . 113.5.3Impact resistance test . 113.5.4Mechanical strength of caps test . 113.6Climatic tests . 123.6.1Behaviour at extreme temperature test . 123.6.2Salt spray tests . 133.7Tests form. 13
SIST EN 2756:2010



EN 2756:2010 (E) 3 Foreword This document (EN 2756:2010) 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 August 2010, and conflicting national standards shall be withdrawn at the latest by August 2010. 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, Bulgaria, Croatia, 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 2756:2010



EN 2756:2010 (E) 4 1 Scope This standard specifies the test methods for incandescent lamps used for aerospace applications. It concerns lamps used for lighting and/or for interior or exterior signalling. 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 2240-001:2009, Aerospace series — Lamps, incandescent — Part 001: Technical specification EN 2240-002, Aerospace series — Lamps, incandescent – Part 002: Main characteristics
ISO 2678, Environmental tests for aircraft equipment — Insulation resistance and high voltage tests for electrical equipment ISO 7137, Aircraft — Environmental conditions and test procedures for airborne equipment IEC 60061-3, Lamp caps and holders together with gauges for the control of interchangeability and safety —Part 3: Gauges 3 Tests 3.1 Test conditions Unless otherwise specified, the tests shall be carried out under the following conditions:  ambient temperature: 15 °C to 35 °C;  atmospheric pressure: 84 kPa to 107 kPa;  relative humidity < 85 %. Prior to all tests, the lamps shall be placed in these conditions for 1 h. The atmosphere of the environment shall not undergo any significant variations during a series of tests. (See ISO 7137.) NOTE Each lamp subjected to tests shall be the object of individual monitoring. 3.2 Visual examination 3.2.1 External appearance The lamps shall not present any defect capable of having an adverse effect on their installation or correct functioning; they shall conform with the characteristics specified in the product standards. The bulb shall have a regular shape and shall not exhibit any defect which may adversely affect utilization. The form and position of the filament shall conform with the indications given in EN 2240-002. SIST EN 2756:2010



EN 2756:2010 (E) 5 3.2.2 Quality of marking The marking of lamps shall be legible and remain so after all the tests. It shall contain the indications specified in EN 2240-001. 3.3 Mass and dimensions The mass should not exceed the values defined in the product standards by more than 10 %. The dimensions shall conform with the indications given in the product standards. The dimensional interchangeability of the lamps shall be checked in individual cases by means of the gauge defined by IEC 60061-3 or by means of the gauge defined in the product standard. 3.4 Electrical and photometric tests 3.4.1 General Before the electrical and photometric tests, the lamps shall be stabilized by energizing them at nominal voltage. For the qualification tests, this stabilization shall be effected by energizing them at nominal voltage for 10 h. NOTE For the photometric tests, the ambient temperature to which the lamps is subjected shall not exceed the values specified at 3.1.
3.4.2 Homogeneity of filament When the lamp is energized at 50 % of nominal voltage, the filament shall appear homogenous and exhibit a uniform brightness except in the vicinity of points of contact with the support(s) and at the leadwires, where account shall be taken of the cooling effect. 3.4.3 Luminous flux at nominal voltage The lamp shall be placed in a correctly calibrated integrating photometer (e.g.: Ulbricht sphere) where it is supplied with direct current at stabilized nominal voltage; the tolerance under test voltage shall be fixed at:  ± 0,1 % for a test voltage > 6 V;  ± 0,2 % for a test voltage ≤ 6 V. When thermal equilibrium has been reached, the intensity of the electric current and the luminous flux are measured. The power consumed shall be equal to the nominal value to within ± 10 %.
The luminous flux recorded shall be equal to the nominal values specified in the product standards, taking account of the tolerances (± 25 %, ± 15 %, ± 10 %) appropriate to the category of lamp. 3.4.4 Luminous flux at reduced voltage This test concerns the lamps for use at reduced voltage. The lamp shall first be subjected to tests specified in 3.4.3. The lamp shall then be energized with direct current at reduced stabilized voltage as specified in the product standard applying the same tolerance as under 3.4.3. SIST EN 2756:2010



EN 2756:2010 (E) 6 When thermal equilibrium is reached, the electric intensity and the luminous flux are measured. The luminous flux measured shall be equal to the value imposed in the product standard to within ± 25 %. 3.4.5 Colour temperature of the filament This test shall apply to clear glass lamps (colourless glass) under nominal conditions of use when the colour temperature is mentioned in the product standards. The lamp to be measured shall be energized at nominal voltage for a period of time which is sufficient to allow thermal equilibrium to be reached. Then the colour temperature shall be measured, recording at the same time the intensity of the current passing through the lamp. The following measuring methods may be used:  interpolation method based on the ratio of the red/blue luminous flux and by reference to the known colour temperature of three gauge lamps energized under specified conditions (the colour
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