1、AECMA STANDARD NORME AECMA AECMA NORM prEN 2591-226 Edition P 1 April 2005 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION Gulledelle 94 - B-1200 Brussels - Tel. + 32 2 775 8110 - Fax. + 32 2 775 8111 - www.aecma-stan.orgICS: 49.060 Descriptors: ENGLISH VERSION Aerosp
2、ace series Elements of electrical and optical connection Test methods Part 226: Corona level Srie arospatiale Organes de connexion lectrique et optique Mthodes dessais Partie 226 : Seuil de dcharge Corona Luft- und Raumfahrt Elektrische und optische Verbindungselemente Prfverfahren Teil 226: Coronas
3、pannung This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerne
4、d 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. After examination and review by users and formal
5、agreement of AECMA-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN at national level by giving the EN the status of
6、 a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 30 April 2005 Comments should be sent within six months after the date of publication to AECMA-STAN Electrical Domain Copyright 2005 by AECMA-STAN Page 2 prEN 2591-226:2005Forewor
7、d This standard was reviewed by the Domain Technical 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. Contents Page 1 Scop
8、e 3 2 Normative references. 3 3 Preparation of specimens. 3 4 Method. 4 5 Requirements 4 Page 3 prEN 2591-226:20051 Scope This standard specifies a test method to determine no sustained Corona discharge on a couple of connectors. It shall be use together with EN 2591-100. 2 Normative references The
9、following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2591-100, Aerospace series Elements of electrical
10、and optical connection Test methods Part 100: General 1). EN 4604-002, Aerospace series Cable, electrical, for signal transmission Part 002: General 1). 3 Preparation of specimens The mating connector pair to be tested shall be arranged in a suitable test such as indicated in Figure 1. 1) Published
11、as AECMA Prestandard at the date of publication of this standard. Page 4 prEN 2591-226:2005Key A Detector amplifier C Corona free coupling capacitor Total circuit capacitance D Discharge display L1 Input line filter (100 dB, 10 kHz to 10 GHz) L2 (10-50) kHz detector input filter T1 (0-130) V Variabl
12、e transformer T2 High voltage transformer (Corona free less than five picocoulombs) V Voltmeter 1 Coaxial cable 2 Sample 3 Oil 4 Detector Figure 1 4 Method Components of the test circuit shall be Corona free to the extent that a discharge of five picocoulombs or less can be measured when the 50 Hz t
13、est potential is increasing to the value at the reduced pressure given by product norm. Type of coaxial cable and length used shall be defined by product norm and EN 4604-002. No grease or similar compound shall be used in or on the test item. After the sample is purged of air, the 50 Hz voltage sha
14、ll be slowly increase until the detector operated at a sensitivity of five picocoulombs level or less. The latter Voltage value is being the Corona level of the connector under test. A Corona detector may be use instead of the test set up describes in Figure 1. 5 Requirements Corona level shall be less than specified in the product norm. 12 3 4
