1、BSI Standards PublicationBS EN 2591-227:2015Aerospace series Elementsof electrical and opticalconnection Test methodsPart 227: Partial discharges testBS EN 2591-227:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 2591-227:2015.The UK participation in its pr
2、eparation was entrusted to TechnicalCommittee ACE/6, Aerospace avionic electrical and fibre optictechnology.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users a
3、re responsible for its correctapplication. The British Standards Institution 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 89128 1ICS 49.060; 49.090Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of
4、theStandards Policy and Strategy Committee on 31 August 2015.Amendments issued since publicationDate Text affectedBS EN 2591-227:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2591-227 August 2015 ICS 49.060; 49.090 English Version Aerospace series - Elements of electrical and optical conn
5、ection - Test methods - Part 227: Partial discharges test Srie arospatiale - Organes de connexion lectrique et optique - Mthodes dessais - Partie 227 : Essai de dcharges partielles Luft- und Raumfahrt - Elektrische und optische Verbindungselemente - Prfverfahren - Teil 227: Teilentladungsprfung This
6、 European Standard was approved by CEN on 5 March 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
7、 concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN memb
8、er into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, Fra
9、nce, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES K
10、OMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2591-227:2015 EBS EN 2591-227:2015EN 2591-227:2015 (E) 2 Contents Page European foreword .3 Int
11、roduction .4 1 Scope 5 2 Normative references 5 3 Abbreviations and definitions 6 4 Applicability 6 5 Apparatus .6 6 Test methods 7 7 Procedure 11 8 Pass fail criteria 11 9 Test report . 12 BS EN 2591-227:2015EN 2591-227:2015 (E) 3 European foreword This document (EN 2591-227:2015) has been prepared
12、 by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this European Standard has received the approval of the National Associations and the Official Services of the member c
13、ountries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2016, and conflicting national standards shall be withdrawn at the latest by February 20
14、16. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organiza
15、tions of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Mal
16、ta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 2591-227:2015EN 2591-227:2015 (E) 4 Introduction For a connector, the presence of partial discharge effects at operating voltage may result in a significant reduct
17、ion of service life. Evidence of partial discharges during operation signifies for example: distance between contact cavities is insufficient for the applied voltage, the quality of the insulation is inadequate possibly due to excessive size of the cavities or voids inside the insulation, a leakage
18、way is present, resulting in a local reduction of the connector insulation properties. The most significant parameters which may influence PDIV, are, when both low pressure and high temperature could be combined (engine area for example). The aim of this European Standard is to define the test metho
19、d and procedure which will determine if an electrical connector will be subjected to partial discharges; in particularly, when it is exposed to a specified temperature and pressure based on an Aircraft environment. BS EN 2591-227:2015EN 2591-227:2015 (E) 5 1 Scope This test European Standard defines
20、 methods to measure the partial discharge inception/extinction voltages (PDIV, PDEV) and partial discharge levels under specific temperatures and pressures on an electrical connector for aircraft use. It shall be used together with EN 2591-100. 2 Normative references The following documents, in whol
21、e or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2267-012, Aerospace series Cables, e
22、lectrical, for general purpose Operating temperatures between 55 C and 260 C Part 012: DZ family, single UV laser printable for use in low pressure atmosphere Product standard 1)EN 2591-100, Aerospace series Elements of electrical and optical connection Test methods Part 100: General EN 3155 (all pa
23、rts), Aerospace series Electrical contacts used in elements of connection EN 60270, High-voltage test techniques Partial discharge measurements (IEC 60270) ASTM D 1868-07, Standard Test Method for Detection and Measurement of Partial Discharge (Corona) Pulses in Evaluation of Insulation System 2)1)
24、Published as ASD-STAN Prestandard at the date of publication of this standard (http:/www.asd-stan.org/).2) Publishedby: ASTM National (US) American Society for Testing and Materials (http:/www.astm.org/). BS EN 2591-227:2015EN 2591-227:2015 (E) 6 3 Abbreviations and definitions For the purpose of th
25、is document, the following abbreviations shall be used: DUT Device Under Test PD Partial Discharges PDIV Partial Discharge Inception Voltage PDEV Partial Discharge Extinction Voltage PDIV is the lowest voltage at which continuous partial discharges occur as the applied voltage is increased. PDEV is
26、the highest voltage at which partial discharges no longer occur as the applied voltage is decreased from the inception voltage described before. More precise information on the partial discharge phenomenon can be found in ASTM D 1868-07 or in EN 60270. One definition of partial discharge can be foun
27、d in 3.1.2 of the ASTM D 1868-07. Test specimen or DUT: It is a connector (plug or receptacle) compliant to a required definition and configuration. 4 Applicability This test method is suitable for all types of connector used in un-pressurized area. 5 Apparatus The detection equipment shall be capab
28、le of detecting partial discharges of five (5) picocoulombs (pC) or less. The detection equipment, cautions and measurement procedures shall be equivalent to those described in ASTM D 1868-07 or in EN 60270. The frequency of the test voltage shall be between 48 Hz and 62 Hz, unless otherwise specifi
29、ed by the technical specification. The apparatus must be capable to generate a combination of low pressure and high temperature, refer to Figure 1. BS EN 2591-227:2015EN 2591-227:2015 (E) 7 Key 1 Monitoring 2 Power supply for female and male contacts (i.e.: Size #8) requiring a sealing sleeves in ba
30、seline configuration, the sealing sleeves must be removed and the contacts must not be longitudinally drilled over the center axis. Four (4) configurations are possible: a) Only male contacts are wired and drilled. There is no seal barrier except at the interfacial seal and at the rear of the recept
31、acle connector. Therefore, the pressure balance can be achieved by the rear of the plug connector through the drilled and un-wired female contacts, refer to Figure 3. b) Only female contacts are wired and drilled. There is no seal barrier except at the interfacial seal and at the rear of the recepta
32、cle connector. Therefore, the pressure balance can be achieved by the rear of the plug connector through the drilled and un-wired male contacts, refer to Figure 4. c) Only male contacts are wired and the sealing sleeve (i.e.: as required in baseline configuration for size #8) must be removed for ach
33、ieving the test. There is no seal barrier except at the interfacial seal. Therefore, the pressure balance can be achieved by the rear of the plug and by the rear of the receptacle connectors, as no sealing sleeve is used. d) Only female contacts are wired and the sealing sleeve (i.e.: as required in
34、 baseline configuration for size #8) must be removed for achieving the test. There is no seal barrier except at the interfacial seal. Therefore, the pressure balance can be achieved by the rear of the plug connector and by the rear of the receptacle connectors, as no sealing sleeve is used.BS EN 259
35、1-227:2015EN 2591-227:2015 (E) 10 Key 1 Receptacle connector 2 Plug connector 3 Male/Female contacts longitudinally drilled 4 Wire Figure 3 Mated connectors and wired male contacts Key 1 Receptacle connector 2 Plug connector 3 Male/Female contacts longitudinally drilled 4 Wire Figure 4 Mated connect
36、ors and wired female contacts BS EN 2591-227:2015EN 2591-227:2015 (E) 11 7 Procedure WARNING Lethal voltage may be present during this test. It is essential that procedures and test apparatus be properly defined and used for safe operations. Unless otherwise specified in the concerned product standa
37、rd, at least three (3) different test specimens shall be tested. The test shall be carried out according EN 60270 and in accordance with the following steps: 1) Connect the connector test specimen to the voltage source. 2) Set up the temperature and the pressure at the values specified in the techni
38、cal specification. 3) Stabilize the temperature and pressure at the specified values. Pass/Fail Criteria of minimum PDIV: 4) Apply the test voltage as defined in the technical specification during one (1) minute and verify that the specified conditions (see Note 1) are not reached. Determination (se
39、e Note 3) of the PDIV: 5) Increase progressively the voltage up to reach the specified conditions (see Note 1) and record PDIV. Determination (see Note 3) of the PDEV: 6) Increase voltage by applying + 50 Vrms to confirm the specify conditions (see Note 1). Then decrease the voltage down to PD full
40、extinction (see Note 2) and record the PDEV. 7) Reduce the voltage down to 0V. 8) Repeat the test sequences from step 4 to step 7 up to 9 times to obtain in total 10 measurements for each required cavity, unless otherwise specified in the technical specification. NOTE 1 Specified conditions are: Det
41、ection level of PD 5 pC max. A steady state of at least 30 partial discharges in 30 s. NOTE 2 No detection of DP (5 pC max.) during 10 s. NOTE 3 Required for test qualification, and optional for manufacturing test control. 8 Pass fail criteria The PDIV threshold shall be greater than the value speci
42、fied in technical specification. The PDEV threshold shall be greater than value specified in technical specification. BS EN 2591-227:2015EN 2591-227:2015 (E) 12 9 Test report The following details shall be stated in the test report: Test method (A or B), Type of wires: Crimped on connector contacts,
43、 Used to connect the test specimens. For each measurement the below data must be recorded: Test specimen and cavity references (i.e.: connector part number and cavity identification of the connector), Pass/Fail status (PDIV and PDEV), Air pressure, temperature, PDIV, PD (of PDIV), PDEV. This page de
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