1、AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication 14 March 2003 prEN 3841 -51 1 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 V
2、ERSION Aerospace series Circuit breakers Test methods Part 51 1 : Combined test: temperature, altitude and vibration Srie arospatiale Disjoncteurs Mthodes dessais Partie 511 : Essai combin : temprature, altitude et vibrations Luft- und Raumfahrt Schutzschalter Prfverfahren Teil 51 1 : Kombinierter V
3、ersuch: Temperatur, Hhe und Schwingung This “Aerospace Series“ Prestandard 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 techn
4、ically approved by the experts of the concerned Domain following member 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. Aft
5、er 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 Standardization) for formal vote. I I Copyright 2003 O by AECMA-STA1 Page 2 prEN 3841-51 1 : 2003 Foreword This standard was reviewed by the Domain T
6、echnical 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 Process Manual, this standard has received approval for Publication. Page 3 prEN 3841 -51 1 : 2003 1 Scope This standard specifies a
7、 method for a combined test of temperature, altitude and vibration of circuit breakers. It shall be used together with 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
8、 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 to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
9、publication referred to applies. EN 3841-100, EN 3841-506, Aerospace series - Circuit breakers - Test methods - Patt 700: General 1) Aerospace series - Circuit breakers - Test methods - Patt 506: Vibration performance 1) 3 Method 3.1 Mounting The circuit breakers shall be mounted in a test chamber o
10、n the vibrator according to 4.2 and 4.3 in EN 3841-100. The means of mounting shall be designed so as to transmit vibrations over the whole frequency range without absorption or natural resonance. An example of an apparatus is given in Figure 1. The electrical connection shall be made with the cable
11、s of the sections specified in EN 3841-100, Table 1. The connection cables shall be attached to the vibration support approximately 100 mm from the terminals. The circuit breakers and the cables shall be mounted with the torque indicated in the product standard. 1) Published as AECMA Prestandard at
12、the date of publication of this standard Page 4 prEN 3841-51 1 : 2003 Key 1 2 3 4 5 6 7 8 9 10 Acceleration control Temperature control Pressure generator and control Electrical cables Flexible seal Circuit breaker test chamber Circuit breaker Circuit breaker support Temperature test chamber (fixed)
13、 Vi brator Figure 1 3.2 Procedure The circuit breakers shall be subjected to a load in accordance with the values specified in the technical specification, until thermal stabilization. The temperature and the pressure in the circuit breakers test chamber shall be stabilized, and maintained at the va
14、lues specified in the technical specification. The temperature shall be measured at the lower and the upper level of the test chamber, and the NOTE difference shall be 1 O “C maximum. The tolerance for pressure shall be k 3 %. The circuit breakers shall be subjected to the vibration test according to 3.2 in EN 3841-506, at the values specified in the technical specification. 3.3 Requirement Requirements in accordance with technical specification and product standard.
