1、STD-AECMA PREN 3841-302-ENGL 1998 1012311 0014887 767 m AECMA STANDARD NORME AECMA AECMA NORM prEN 3841 -302 Edition P 2 September 1998 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 ICs: 49.060
2、 Supersedes edition P 1 June 1996 ENGLISH VERSION Aerospace series Circuit breakers Test methods Part 302: Insulation resistance Srie arospatiale Disjoncteurs Mthodes dessais lectriques Partie 302: Rsistance disolement Luft- und Raumfahrt Schutzcchalter Elektrische Prfverfahren Teil 302: Isolationsw
3、iderstand This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical Committee fo
4、lio wing comment by the Member countries. 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 signature of the AECM
5、A Standard Checking Centre (NPS) and formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. I Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean
6、-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX C2 Chairman I Edition approved for publication Comments should be sent within six months after the date of publication to 1998-09-30 AECMA Gulledelle 94 B-1200 BRUXELLES Mr Pezzetta aecma 1998 1 Scope This standard specifies a method of verifying
7、the insulation resistance 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 appropriate places in the text and the p
8、ublications 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 publication referred to applies. EN 3841-
9、100 Aerospace series - Circuit breakers - Test methods - Part 100: General 1) 3 Method 3.1 Procedure Insulation resistance is measured at a test voltage of 500 V d.c The reading shall be taken after stabilization of temperature and pressure. Measurements shall be taken in the closed and open positio
10、n between all the points as indicated below according to the values defined in the technical specification. Measuring points: Measurements are taken with the circuit breakers in the “on“ setting (closed position): - between the terminals of each individual pole and all other connections including si
11、gnal contacts; - between all connections including signal contacts and earth (mounting). Measurements are taken with the circuit breakers in the “off“ setting (open position) - between each connection and all other connections including signal contacts; - between all connections including signal contacts and earth. 3.2 Requirements For all admissible temperatures at ground level, the values recorded shall meet the requirements of the technical specification. 1 ) Published as AECMA Prestandard at the date of publication of this standard Previous page is blank
