1、AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication 14 March 2003 prEN 3841-401 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: ENGLISH VERSION Supersedes edition P 2 September
2、1998 Aerospace series Circuit breakers Test methods Part 401 : Sand and dust Srie arospatiale Disjoncteurs Mthodes dessais Partie 401 : Sable et poussires Luft- und Raumfahrt Schutzschalter Prfverfahren Teil 401: Sand und Staub This “Aerospace Series“ Prestandard has been drawn up under the responsi
3、bility 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. Subsequent to the publication
4、 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 submitted as a draft European
5、Standard to CEN (European Committee for Standardization) for formal vote. I I Copyright 2003 O by AECMA-STA1 Page 2 prEN 3841-401 : 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
6、the rules of AECMA-STAN defined in AECMA- STANS General Process Manual, this standard has received approval for Publication. Page 3 prEN 3841-401: 2003 1 Scope This standard specifies a method of verifying the ability of circuit breakers to withstand sand and dust. It shall be used together with EN
7、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 amendments to
8、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. IS0 7137, EN 3841-100, Aircraft - Environmental conditions and test procedures for airbor
9、ne equipment) Aerospace series - Circuit breakers - Test methods - Patt 700: General 2) 3 Method 3.1 Mounting The circuit breakers shall be mounted on a support in the test chamber so that they are completely exposed to the air flow. 3.2 Procedure The circuit breakers (at no load) shall be in the ON
10、 position for the first and in the OFF position for the second cycle. They shall be subjected to the sand and dust test according to test procedure 1.7 of IS0 71 37. The test shall be carried out exposing all six surfaces of the circuit breakers to the sand stream, except that the test duration is fixed for 2 h for each surface. 3.3 Requirement 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
