1、AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication 14 March 2003 prEN 3841 -504 Edition P 3 March 2003 Comments should be sent within six months after the date of publication to Electrical Domain AECMA-STAN ICs: 49.060 Descriptors: Supersedes edition P 2 September 1998 ENGLISH VE
2、RSION Aerospace series Circuit breakers Test methods Part 504: Strength of mounting elements Srie arospatiale Luft- und Raumfahrt Disjoncteurs Schutzschalter Mthodes dessais Prfverfahren Partie 504 : Rsistance des lments de fixation Teil 504: Festigkeit der Befestigung This “Aerospace Series“ Presta
3、ndard has been drawn 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 memb
4、er comments. Subsequent 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
5、 it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Page 2 prEN 3841-504: 2003 Foreword This standard was reviewed by the Domain Technical Coordinator of AECMA-STANS Electrical Domain. After inquiries and votes carried out in accordance
6、 with the rules of AECMA-STAN defined in AECMA- STANS General Process Manual, this standard has received approval for Publication. Page 3 prEN 3841-504: 2003 1 Scope This standard specifies a method of verifying the strength of the mounting elements of circuit breakers. It shall be used together wit
7、h EN 3841-100. 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 amendment
8、s 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 3841-100, Aerospace series - Circuit breakers - Test methods - Patt 700: General
9、1) 3 Method 3.1 Mounting The tightening torque specified in the technical specification shall be applied three times for 1 min each, with one disassembly between each operation. 3.2 Rotation The housing of the circuit breakers shall be turned about its mounting in both directions successively at the
10、 torque value specified in the technical specification. No deformation outside tolerances or rupture of the locating device shall result. The housing of the circuit breakers shall not break. 4 Requirements in accordance with technical specification and product standard. Req u i remen t 1) Published as AECMA Prestandard at the date of publication of this standard
