1、FORM 36 Version 4 Fax: 01 8 1 996 7400 T This draft is issued to allow comments from interested parties; ali comments will be given consideration prior to e wr for r O copying is allowed, in any form, whou prior written peisson from SI except as permitted under the esigns and Patent Act I988 or for
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3、 obtained from the responsible comrniee secretary. Standards which implement international or European pubcaons referred to in this draft may be found under the section entitled international Standards correspondence index, or by using the I Standards Electronic Cakaiogue. E-mail address: peter-sIot
4、bsi.0rg.uk Direct tel: 0181-996 7147 la. 28, 28/07/99 i FORM 36 Version 4 ed on uroean dscussions in whic the UK took an aeti e welcome and will assist in the reparat ti are received to the contrary, then the U a i CU Ia ri y welco if it receives the n uage text ncan make one point only, e clearly s
5、araed from the others and be tructured as h/ta/figure nu m ber; eneras, tecnicl or editorial); n All coment sol be smitte to th ail or on diskette ( iven above. No acknowedeen will no Microsoft and MS-DOS are registered trademarks, and Windows is a trademark of Microsoft Corporation. er ou oflser th
6、e u smit a neative wh reaon or positive vote refers to a draft text curret under discussion wthn a tehni committee may cc before the expi of the DPC comment A (The chnic Assoiation of Aerospace Industries). The latest date for mment to the A Any ommnts ceived as a result of the DPC, after this expir
7、y date, will be reviewed by the relevant ken into account when they consider any fher UK vote on the draft or the AECMA consists of the national aerospace trade associations from nine European countries, the UK member being SBAC ( Society of British Aerospace Companies). AECMA has been given a manda
8、te by CEN to prepare all European Aerospace Standards on its behaf. No. 28, 28JQ7I98 “E T4 0: 3 Ref: Superseding Ref.: 2E UDC: 49. Descriptors: Aerospace industry, aircraft equipment, relays, tests, Master document: English Sponsor: BarneWMarqueteau THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES -
9、 STANDARDIZATION Gulledelle 94, B - 1200 Bruxelles Tel.: (32) 2 775 81 1 O Fax.: (32) 2 775 81 11 Page 2 prEN 2349-315 : 1999 Page 3 prEN 2349-31 5 : 1999 This standard specifies a method for testing the electrical service life - lamp load of relays and contactors. It shall be used together with EN
10、2343-1 OO. 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 amendments to or revisions of any of
11、 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 2349-100 Aerospace series - Requirements and test procedures for relays and contactors - Part 1 O0 : General
12、 requirements EN 2349-302 Aerospace series - Requirements and test procedures for relays and contactors Part 302 : Insulation resistance EN 234-303 Aerospace series - Requirements and test procedures for relays and contactors - Part 303 : Dielectric strength EN 2349-307 Aerospace series - Requiremen
13、ts and test procedures for relays and contactors Part 307 : Contact voltage drop EN 2349-41 2 Aerospace series - Requirements and test procedures for relays and contactors s Part 412 : Seal The relay or contactor shall be wired in accordance with EN 2349-100 and the rated contact load. The relay or
14、contactor shall be mounted and placed in an cair circulating heating cabinet. .I Each normally open and normally closed contact shall connect, conduct and disconnect the load specified in the product standard. The in-rush current shall be 12 times the rated current (applicable for the lamp load) for
15、 a period of 15 ms to 20 ms. Separate test samples shall be used in each case for loading with direct current, single phase alternating current and three-phase alternating current. For three-phase alternating current, the load shall be connected to three adjacent contacts. Arcing from phase to phase
16、 shall constitute a failure. 4.4 The coil of the relay or contactor shall be energized at the rated voltage. 4.5 The contacts shall be monitored for faultless function. Any defective switching operation shall constitute a failure. Page 4 prEN 2349-31 5 : 1999 A voltage drop on the contacts of over i
17、 O % of the rated voltage shall constitute a failure. 4.7 The service life test shall be performed as follows : 50 % at normal ambient temperature; 50 % at a pressure equivalent to 25 O00 rn and a temperature of 125 “C. The requirement for testing at an altitude equivalent to 25 060 m may be replace
18、d by testing with a 1 O % higher maximum ambient temperature. During the test, the housing of the relay or contactor shall be connected with the earth of the electrical installation by a fuse with a rating of 5 % of the rated resistive contact current, but not greater than 3 A. Blowing of the fuse s
19、hall constitute a failure. umber of switching cycles : see product standard. One switching cycle comprises : connection time : (2,OO -+ 0,05) s; disconnection time : (7 -+ 2) s. The temperature increase shall be measured for : plug-in relays : on the housing; screw-type connections : on the connector bolt. No electrical or mechanical failure; No sticking or seizing of contacts; No btown fuse; No temperature increase over 75K. Test in accordance with EN 2349-302,303,307 and 41 2.
