1、AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication 14 March 2003 prEN 3841 -507 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 507: Mechanical shocks Srie arospatiale Disjoncteurs Mthodes dessais Partie 507 : Chocs mcaniques Luft- und Raumfahrt Schutzschalter Prfverfahren Teil 507: Mechanische Ste This “Aerospace Series“ Prestandard has been drawn up under the respon
3、sibility 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 publicati
4、on 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 Europea
5、n Standard to CEN (European Committee for Standardization) for formal vote. I I Copyright 2003 O by AECMA-STA1 Page 2 prEN 3841-507: 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 3841-507: 2003 1 Scope This standard specifies a method of verifying the ability of circuit breakers to withstand mechanical shocks. 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. IS0 7137, EN 3841-100, Aircraft - Environmental conditions and test procedures for a
9、irborne equipment) Aerospace series - Circuit breakers - Test methods - Patt 700: General 2) 3 Method 3.1 Mounting The circuit breakers shall be mounted on the shock table according to 4.2 and 4.3 of EN 3841-100. The means of mounting shall be designed so as to transmit the pulses without absorption
10、 or natural resonance. The electrical connection shall be made with the cables of the sections specified in EN 3841-100, Table 1. The connection cables shall be attached to the shock table approximately 100 mm from the terminals. The circuit breakers and the cables shall be mounted with the torque i
11、ndicated in the product standard. 3.2 Procedure The circuit breakers shall be subjected to the mechanical shocks test according to IS0 7137, test procedure 2.1. Three shocks shall be applied in each direction and for every switch setting: - in the closed position at 90 % of current rating; - in the
12、open position. The acceleration peak value (half sine-wave from of 1 1 ms duration) is specified in the technical specification. During the test, it shall be established that the contacts do not close for a period 2 10 ps (circuit breakers in the open position) or open for a period 2 10 ps (circuit breakers in the closed position). 4 Requirements in accordance with technical specification and product standard. Req u i remen t 1) Endorsement of EUROCAEIED-14C and RTCNDO-160C 2) Published as AECMA Prestandard at the date of publication of this standard
