1、 CEN PRENxZbb5- 003 94 = 3404589 00b4Lb2 365 AECMA STANDARD prEN 2665-003 NORME AECMA Edition P 1 AECMA NORM June 1994 DIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 Edition
2、 approved for publication 1994-06-30 UDC : 621.31 6.57:629.7 Comments should be sent within six months C2 Chairman M. Le Cunff after the date of publication to AECMA Technopolis - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cedex - FRANCE Descriptors : Aircraft industry, aircraft equip
3、ment, circuit breaker, manufacturing requirements, designation, marking ENGLISH VERSION Aerospace series Circuit breakers, three-pole, temperature compensated, rated currents 20 A to 50 A Part 003 : Metric thread fasteners, distance between terminal centres 19 mm Product standard Srie arospatiale Di
4、sjoncteurs tripolaires compenss en temprature, intensits nominales 20 A 50 A Partie 003 : Visserie au pas mtrique, entre-axe des bornes 19 mrn Norme de produit Luft- und Raumfahrt Temperaturkompensierte dreipolige Schutzschalter, Nennstrme von 20 A bis 50 A Teil 003 : Metrisches Klemmengewinde, Klem
5、mabstand 19 mm Produ ktnorm This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the c
6、oncerned Technical Committee following 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 examina
7、tion and signature of the AECMA Standard Checking Centre 1NP.S) 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. Nota - Extra copies can be supplied by B.N.A.E. - T
8、echnopolis 54 - 199, rue Jean-Jacques Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX CEN PREN*E!hh5- 003 74 3404587 0064363 2TL Page 3 prEN 2665-003 : 1994 1 Scope This standard specifies the required characteristics for three-pole temperature compensated circuit breakers with rated currents from 20 A t
9、o 50 A, with metric thread fasteners, for use in aircraft electrical systems, at a temperature between - 55 OC and 90 OC and at a maximum altitude of Z = 15 O00 m. It shall be used together with EN 2665-001. These circuit breakers are for use in aircraft with power supplies in accordance with EN 228
10、2. 2 Normative references IS0 965-2 IS0 11 90-1 IS0 7045 EN 2282 EN 2350 EN 2665-001 IS0 general purpose metric screw threads - Tolerances - Part 2 : Limits of sizes for general purpose bolt and nut threads - Medium quality Copper and copper alloys - Code of designation - Part 1 : Designation of mat
11、erials Cross-recessed pan head screws - Product grade A Aerospace series - Characteristics of aircraft electrical supplies Aerospace series - Circuit breakers - Technical specification Aerospace series - Circuit breakers, three-pole, temperature compensated, rated currents 20 A to 50 A - Part O01 :
12、Technical specification 1) 3 Definitions See EN 2350. 4 Required characteristics 4.1 Short-circuit current Test current : 1 500 A prospective Number of CO-OCO tests : 1 CO + 2 OCO 4.2 Tightening torques for vibration, shock and acceleration tests : 4.2.1 4.2.2 Connection : 2,2 Nm to 2,5 Nm Mounting
13、: 3 Nm to 5 Nm 1 ) Published as AECMA Prestandard at the date of publication of this standard Previous page is blank Page 4 prEN 2665-003 : 1994 4.3 Dimensions, attachment, connection See figures 1, 2 and 3 Dimensions and tolerances are in millimetres Push-button depressed 10,4 f 0.4 t7-i At tachmen
14、t nut I $1 I I I +I I I $1 7 +i aJ it Push-button released MI2 x 0,75 - t 1.5 min. 7 I CI BI AI 1; 3 rc it ul + Rated current markino (examole) I -Il- Figure 1 - Circuit breaker W O m -u E c .- 60 min. - - I I I l c E .- Ln 4 I c c O 3 .- n c m 1 Figure 2 - Panel cut-out I (panel thickness 1,5 mm to
15、 3 rnm) Figure 3 - Connection m W X a c W W W 3 n c CEN PREN*Zbb5- 003 94 = 3404589 00643b.5 074 Page 5 prEN 2665-003 : 1994 4.4 Fasteners See figures 4 to 7 Dimensions and tolerances are in millimetres Screw : IS0 7045 - M4 x 6 - 4,8 - Z Material : steel Protection : zinc plated, passivated, irisat
16、ed Figure 4 - Screw NUI : IS0 965-2 - MI2 x 0,75 - 6H Material : aluminium alloy 2017 Protection : black sulphur anodized P 14- 0,l Figure 6 - Attachment nut Two wave corrugated washer Material : CuBe 1,9 to IS0 11 90-1 Hardness : 350 HV to 410 HV $9 k0.4 050 f 0,03 f Figure 5 - Washer MI 2 DIC lock
17、 washer (internal overlapping teeth) Material : steel Hardness : 400 HV to 480 HV Protection : black zinc dichromate Figure 7 - Lock washer - 0,50 * 0,03 1) Designation of “ALUMINUM ASSOCIATION“ CEN PRENaZbb5- 003 74 3404587 0064Lbb TOO Description block CIRCUIT BREAKER Page 6 prEN 2665-003 : 1994 I
18、dentity block EN2665-003C20A 4.5 Mass (with mounting hardware, provisioning code D) Maximum mass : 165 g (with mounting hardware, provisioning code D) Number of this T- standard Design code C = black button, fastener : M4 Rated current 5 Designation EXAMPLE : Provisioning code according to table 1 NOTE : If necessary, the code I9005 shall be placed between the description block and the identity block. Table 1 The information concerning the supply of connection elements shall not appear on the product. 6 Marking See EN 2350
