1、 STD.AECMA PREN 2349-312-ENGL 2000 0 LOL23LL 0037550 bT4 - Edition approved for publication AECMA STANDARD NORME AECMA AECMA NORM Comments should be sent within six months C2 Chairman after the date of publication to prEN 2349-31 2 Edition P 1 January 2000 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AE
2、ROSPACE INDUSTRIES (AECMA) Guiledelle 94 - 6-1 200 BRUXELLES - Tel. (+32) 2 775 81 1 O - Fax. (+32) 2 775 81 11 ICs: Descriptors: ENGLISH VERSION Aerospace series Requirements and test procedures for relays and contactors Part 312: Electrical service life - Mixed load Srie arospatiale Exigences et m
3、thodes dessais des relais et contacteurs Partie 312: Pouvoir de commutation - Charges combines Luft- und Raumfahrt Anforderungen und Prfverfahren fr Relais und Schaltschtze Teil 312: Elektrische Lebensdauer - Mischlast This “Aerospace Series“ Prestandard has been drawn up under the responsibility of
4、 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 following comment by the Member countries. Subsequent to the publication of this Prestandard
5、, 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 AECMA Standard Checking Centre (NPS) and formal agreement of the Official Services of the Membe
6、r countries it will be submiited as a draft European Standard to CEN (European Committee for Standardization) for formal vote. 2000-01 -31 AECMA Gulledeile 94 6-1200 BRUXELLES Mr Peuetta I I l aecrna 2000 STD-AECMA PREN 2349-3LZ-ENGL 2000 = 1012333 0037553 530 Page 2 prEN 2349-312: 2000 Contents Sco
7、pe 3 Normative references . 3 Mounting method 3 20 A, the maximum permissible contact V = li x (0,151 12) + 0,051 x I O00 Where V II l2 is the voltage drop in millivolts; is the load current in amperes; is the rated current in amperes. permissible temperature, as defined in the product shall be conn
8、ected to the earth of the electrical 4.1 I standard. The test shall be performed at the maximum During the test the housing of the relay or contactor 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 shall constitute a f
9、ailure. 4.1 2 - coil energized time: (29 I 3) s; - coil de-energized time: (15 f 0,5) s. Number of switching cycles: see product standard. One switching cycle comprises: STD-AECMA PREN 2349-3LZ-ENGL 2000 D LOL23LL 003791i9 50b Page 5 prEN 2349-312: 2000 5 Test criteria - No electrical or mechanical failure; - No sticking or seizing of contacts; - No blown fuse; - The voltage drop on the contacts shall not exceed the values shown in table I. 6 Verification tests Test in accordance with EN 2349-302, 303, 307 and 412.
