1、:EN PRENx3773- 003 94 m 3404587 00b4458 687 m Edition approved for publication 1994-06-30 AECMA STANDARD NORME AECMA AECMA NORM Comments should be sent within six months after the date of publication to AECMA Technopolis - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cedex - FRANCE C2 C
2、hairman M. LeCunff prEN 3773-003 Edition P 1 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 UDC : 621.316.57:629.7 Descriptors : Aircraft industry, aircraft equipm
3、ent, circuit breaker, manufacturing requirements, designation, marking ENGLISH VERSION Aerospace series Circuit breakers, single-pole, temperature compensated, rated currents 1 A to 25 A, switching capacity 65 Inll O00 A max. Part 003 : Metric thread fasteners, distance between terminal centres 12 m
4、m Product standard Srie arospatiale Disjoncteurs unipolaires compenss en temprature, intensits nominales 1 A 25 A, pouvoir de coupure 65 Inll O00 A max. Partie 003 : Visserie au pas mtrique, entre-axe des bornes 12 mm Norme de produit Luft- und Raumfahrt Temperaturkompensierte einpolige Schutzschalt
5、er, Nennstrme von 1 A bis 25 A, Schaltvermgen 65 Inll O00 A max. Teil 003 : Metrisches Klemmengewinde, Klemmabstand 12 mm Produktnorm This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is publish
6、ed on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical Committee folio wing comment by the Member countries. Subsequent to the publication of this prestandard, the technical content shall not be changed to an extent that interchan
7、geability 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 Member countries it will be submitted as a draft European Standard to CEN (Eu
8、ropean Committee for Standardization) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX CEN PRENw3773- 003 94 3404589 00b4459 513 Page 3 prEN 3773-003 : 1994 1 Scope This standard specifies the requir
9、ed characteristics for single-pole temperature compensated circuit breakers with rated currents from 1 A to 25 A, with metric thread fasteners, for electrical connections, for use in aircraft electrical systems, at a temperature between - 55 OC and 125 OC and at a maximum altitude of Z = 22 O00 m. I
10、t shall be used together with EN 3773-001. These circuit breakers are for use in aircraft with power supplies in accordance with EN 2282. 2 Normative references IS0 965-2 IS0 11 90-1 IS0 7045 EN 2282 EN 2350 EN 3773-001 IS0 general purpose metric screw threads - Tolerances - Part 2 : Limits of sizes
11、 for general purpose bolt and nut threads - Medium quality Copper and copper alloys - Code of designation - Part 1 : Designation of materials Cross-recessed pan head screws - Product grade A Aerospace series - Characteristics of aircraft electrical supplies Aerospace series - Circuit breakers - Tech
12、nical specification Aerospace series - Circuit breakers, single-pole, temperature compensated, rated currents 1 A to 25 A, switching capacity 65 Znll O00 A max. - Part O01 : Technical specification 1) 3 Definitions See EN 2350. 4 Required characteristics These circuit breakers are operated by a push
13、-pull control button with trip free release, and delayed tripping ; they are explosion-proof. Their function is assured up to the short-circuit current. 4.1 Short-circuit current Test current : Number of CO-OCO tests : 1 CO + 2 OCO 28 V d.c., 65 In prospective 11 5 V a.c. 400 Hz, 65 Znll O00 A max.
14、prospective 4.2 4.2.1 4.2.2 Tightning torque for vibration, shock and acceleration tests Connection : 1,5 Nm to 1,7 Nm Mounting : 3 Nm to 5 Nm 1) Published as AECMA Prestandard at the date of publication of this standard. Previous page is blank CEN PRENx3773- 003 94 m 3404589 00b44b0 235 W Page 4 pr
15、EN 3773-003 : 1994 4.3 Dimensions, attachment, connection See figures 1, 2 and 3 Dimensions and tolerances are in millimetres Push-button released MI2 x 0.75 Black White Black Attachment nut Lock washer SuDply terminals Push-button depressed $10,4 f 0.4 Mounting t-l Rated current marking - Antirotat
16、ion pin compatible with cut-out shown in figure Ln U .- Figure 1 - Circuit breaker L .- n c O 3 c m t 25 min. “-80- Figure 3 - Connection Ln W x a c W s c W n Figure 2 - Panel cut-out (panel thickness 1.5 mm to 3 mml CEN PRENa3773- 003 94 = 3404589 00b44bL 171 1,s rnax. *Y Page 5 prEN 3773-003 : 199
17、4 - Il ( 4.4 Fasteners See figures 4 to 7 Dimensions and tolerances are in millimetres 0,50 f 0,03 Screw : IS0 7045 - M4 x 6 - 4,8 - Z Material : steel Protection : zinc plated, passivated, irisated Two wave corrugated washer Material : CuBe 1,9 to IS0 11 90-1 Hardness : 350 HV to 410 HV I -&E+ +- F
18、igure 4 - Screw Nut : IS0 965-2 - MI2 x 0,75 - 6H Material : aluminium alloy 2017 ) Protection : black sulphur anodized I Figure 6 - Attachment nut $ 4.3 + 0, $9 +0,4 Figure 5 - Washer M12 DIC lock washer (internal overlapping teeth) Material : steel Hardness : 400 HV to 480 HV Protection : black zi
19、nc dichromate I Figure 7 - Lock washer 1 ) Designation of “ALUMINUM ASSOCIATION“ CEN PREN*3773- 003 94 m 3404589 0064462 008 m Description block CIRCUIT BREAKER Page 6 prEN 3773-003 : 1994 Identity block EN3773-003C20Ai 4.5 Maximum mass : 26 g Mass (with code D fasteners) Number of this standard C D
20、esign = black code button, - fastener : M4 Rated current 5 Designation EXAMPLE : Provisioning code according to table 1 L 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
