1、AECMA STANDARD prEN 3475-41 5 NORME AECMA Edition P 2 AECMA NORM March 2002 Edition approved for publication Comments should be sent within six months after the date of publication to 2002-03-29 AECMA-STAN Gulledelle 94 B-1200 BRUXELLES PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES -
2、 STANDARDIZATION (AECMA-STAN) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (t32) 2 775 81 10 - Fax. (t32) 2 775 811 1 Electrical Domain Mr Pezzetta ICs: 49.060 Supersedes edition P 1 August 2001 Descriptors: ENGLISH VERSION Aerospace series Cables, electrical, aircraft use Test methods Part 415: Rapid ch
3、ange of temperature Srie arospatiale Luft- und Raumfahrt Mthodes dessais Prfverfahren Cbles lectriques a usage aronautique Partie 415 : Variation rapide de temprature Elektrische Leitungen fr Luftfahrt Verwendung Teil 415: Schneller Temperaturwechsel This Herospace Series“ Prestandard has been drawn
4、 up under the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published on green paper for the needs of the European Aerospace Industry, It has been technically approved by the experts of the concerned Domain following member comments. Subsequ
5、ent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review by users and formal agreement of AECMA-STAN it will be submitte
6、d as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Page 3 prEN 3475-415: 2002 1 Scope This product standard defines a test method to evaluate the performance of a coaxial cable after exposure to a rapid change of temperature. It shall be used together wit
7、h EN 3475-100. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendmen
8、ts to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 3475-1 O0 EN 3475-801 Aerospace series - Cables, electrical, aircraft use - Test
9、 methods - Part 801: EN 3475-806 Aerospace series - Cables, electrical, aircraft use - Test methods - Part 806: Aerospace series - Cables, electrical, aircraft use - Test methods - Part 100: General 1) Capacitance per unit length 1) Attenuation 1) 3 Preparation of specimens 3.1 Specimens First speci
10、men: length is specified in the product standard. Second specimen: length = 1,5 m (Specimen shall be cut from the specimen unit) 3.2 Conditioning The specimens shall not be bent with a radius less than 30 times overall diameter of the cable, during low or high temperature exposure. 3.3 Initial measu
11、rement On first specimen: - capacitance per unit of length (EN 3475-801). - attenuation at 200 MHz (EN 3475-806). On second specimen: - measure any difference in length which may exist between the ends of the dielectric and conductor, 1) Published as AECMA Prestandard at the date of publication of t
12、his standard Page 4 prEN 3475-415: 2002 4 Test method and requirements 4.1 Test The specimen shall be subjected to the following cycle for a total of three cycles. “C TA .- T3 1 cycle A : start of first cycle ti = 4 hours t2 4 hours Figure 1 -Temperature cycle 4.2 Temperature test requirement Unless
13、 otherwise specified, TA and TB are the maximum and the minimum operating temperatures defined in the product standard. After the conditioning period, remove the specimen from the heat chamber and condition at room temperature for four hours minimum. 4.3 Final measurement On first specimen: - capaci
14、tance per unit of length (EN 3475-801); - attenuation at 200 MHz (EN 3475-806). On second specimen: - measurement of both ends of the specimen for shrinkage or expansion of the dielectric relative to the conductor Page 5 prEN 3475-41 5: 2002 5 Requirements Maximum variation of capacitance as specifi
15、ed in the product standard. Maximum increase of attenuation as specified in the product standard. Maximum shrinkage or expansion after temperature cycle, from the initial value, shall be less than the value required in the product standard. AECMA STANDARD prEN 3475-41 5 NORME AECMA Edition P 2 AECMA
16、 NORM March 2002 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION (AECMA-STAN) Gulledelle 94 - B-1200 BRUXELLES - Tel. (t32) 2 775 81 10 - Fax. (t32) 2 775 811 1 Supersedes edition P 1 ICs: 49.060 August 2001 Edition approved for publication 2002-03-29 ENGLISH VERSION
17、Comments should be sent within six months after the date of publication to AECMA-STAN Mr Pezzetta Gulledelle 94 Electrical Domain B-1200 BRUXELLES Aerospace series Cables, electrical, aircraft use Test methods Part 41 5: Rapid change of temperature Srie arospatiale Luft- und Raumfahrt Mthodes dessai
18、s Prfverfahren Cbles lectriques a usage aronautique Partie 41 5 : Variation rapide de temprature Elektrische Leitungen fr Luftfahrt Verwendung Teil 415: Schneller Temperaturwechsel This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA-STAN (The European Association
19、of Aerospace Industries - Standardization). It is published on green paper for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content sha
20、ll not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review by users and formal agreement of AECMA-STAN it will be submitted as a draft European Standard to CEN (European Committee for Standar
21、dization) for formal vote. I I l aecma 200 Page 3 prEN 3475-415: 2002 I Scope This product standard defines a test method to evaluate the performance of a coaxial cable after exposure to a rapid change of temperature. It shall be used together with EN 3475-1 OO. 2 Normative referen ces This European
22、 Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications app
23、ly to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 3475-1 O0 EN 3475-801 Aerospace series - Cables, electrical, aircraft use - Test methods - Part 801: EN 3475-806 Aerospace series -
24、 Cables, electrical, aircraft use - Test methods - Part 806: Aerospace series - Cables, electrical, aircraft use - Test methods - Part 100: General 1) Capacitance per unit length 1) Attenuation 1) 3 Preparation of specimens 3.1 Specimens First specimen: length is specified in the product standard. S
25、econd specimen: length = 1,5 m (Specimen shall be cut from the specimen unit) 3.2 Conditioning The specimens shall not be bent with a radius less than 30 times overall diameter of the cable, during low or high temperature exposure. 3.3 Initial measurement On first specimen: - capacitance per unit of
26、 length (EN 3475-801). - attenuation at 200 MHz (EN 3475-806). On second specimen: - measure any difference in length which may exist between the ends of the dielectric and conductor. 1) Published as AECMA Prestandard at the date of publication of this standard Page 4 prEN 3475-41 5: 2002 4 Test met
27、hod and requirements 4.1 Test The specimen shall be subjected to the following cycle for a total of three cycles. “C TA .- T3 1 cycle A : start of first cycle ti = 4 hours tp 4 hours Figure 1 -Temperature cycle 4.2 Tem pe rat u re test req u i rem e nt Unless otherwise specified, TA and TB are the m
28、aximum and the minimum operating temperatures defined in the product standard. After the conditioning period, remove the specimen from the heat chamber and condition at room temperature for four hours minimum. 4.3 Final measurement On first specimen: - capacitance per unit of length (EN 3475-801); -
29、 attenuation at 200 MHz (EN 3475-806). On second specimen: - measurement of both ends of the specimen for shrinkage or expansion of the dielectric relative to the conductor Page 5 prEN 3475-415: 2002 5 Req u i re men ts Maximum variation of capacitance as specified in the product standard. Maximum increase of attenuation as specified in the product standard. Maximum shrinkage or expansion after temperature cycle, from the initial value, shall be less than the value required in the product standard.
