1、AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication 14 March 2003 prEN 3841-407 Edition P 1 March 2003 Comments should be sent within six months after the date of publication to Electrical Domain AECMA-STAN ICs: 49.060 Descriptors: ENGLISH VERSION Aerospace series Circuit breakers
2、 Test methods Part 407: Temperature variation Srie arospatiale Disjoncteurs Mthodes dessais Partie 407 : Diffrence de temprature Luft- und Raumfahrt Schutzschalter Prfverfahren Teil 407: Temperaturwechsel This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA-STAN (T
3、he 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. Subsequent to the publication of this Prestandard, t
4、he 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 submitted as a draft European Standard to CEN (Europe
5、an Committee for Standardization) for formal vote. Page 2 prEN 3841-407: 2003 Foreword This standard was reviewed by the Domain Technical Coordinator of AECMA-STANS Electrical Domain. After inquiries and votes carried out in accordance with the rules of AECMA-STAN defined in AECMA- STANS General Pro
6、cess Manual, this standard has received approval for Publication. Page 3 prEN 3841-407: 2003 1 Scope This standard specifies a method of verifying the ability of circuit breakers to withstand a temperature variation. It shall be used together with EN 3841-100. 2 Normative references This European St
7、andard 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 apply t
8、o this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. IS0 7137, EN 3841-100, Aircraft - Environmental conditions and test procedures for airborne equipment) Aerospace series - Circuit breakers
9、 - Test methods - Patt 700: General 2) 3 Method 3.1 Mounting The circuit breakers shall be mounted on a support placed in the chamber and connected to an outside power supply. 3.2 Procedure The circuit breakers shall be tested in the ON position. The temperature variation test shall be carried out a
10、ccording to test procedure 1.2 (without altitude) of IS0 7137. The technical specification shall specify the category, the high and low operating temperature extremes, the number of cycles load and the applicable performance tests. 4 Req u i remen t Requirements in accordance with technical specification and product standard. 1) Endorsement of EUROCAEIED-14C and RTCNDO-160C 2) Published as AECMA Prestandard at the date of publication of this standard
