ASD-STAN PREN 3774-004-2012 Aerospace series Circuit breakers three-pole temperature compensated rated currents 1 A to 25 A Part 004 UNC thread terminals Product standard (Edition .pdf

1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 3774-004 Edition P 2 June 2012 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATIONAvenue de Tervuren, 270 - B-1150 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.orgICS: 49.060 Supersedes Edi

2、tion P 1 of June 1994 and will supersede EN 3774-004:1999Descriptors: ENGLISH VERSION Aerospace series Circuit breakers, three-pole, temperature compensated, rated currents 1 A to 25 A Part 004: UNC thread terminals Product standard Srie arospatiale Disjoncteurs tripolaires compenss en temprature, i

3、ntensits nominales 1 A 25 A Partie 004 : Bornes filetage UNC Norme de produit Luft- und Raumfahrt Schutzschalter, dreipolig, temperaturkompensiert, Nennstrme von 1 A bis 25 A Teil 004: UNC-Klemmengewinde Produktnorm This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AS

4、D-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandar

5、d, 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 review by users and formal agreement of ASD-STAN, it will be submitted as a draft European Standard (prEN) to C

6、EN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN at national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN

7、 Edition approved for publication 30 June 2012 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2012 by ASD-STAN prEN 3774-004:2012 (E) 2 Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Dimensions and mass .3 4 Characteris

8、tics .5 5 Designation 10 6 Rated current code 10 7 Delivery codes 10 8 Marking .11 9 Technical specification .11 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical Domain. After inquiries and votes carried out in accordance with the rules of ASD-STAN defi

9、ned in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 3774-004:2012 (E) 3 1 Scope This standard specifies the characteristics of three-pole circuit breakers, temperature compensated with a rated current from 1 A to 25 A, used in aircraft on-board circuits

10、 at a temperature between 55 C and 125 C for ratings 15 A and 55 C to 90 C for ratings 15 A and at an altitude of 22 000 m max. These circuit breakers are operated by a push-pull type single pushbutton (actuator), with delayed action “trip-free“ tripping. They will continue to function up to the sho

11、rt-circuit current. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 228

12、2, Aerospace series Characteristics of aircraft electrical supplies EN 2350, Aerospace series Circuit breakers Technical specification EN 2996-001, Aerospace series Circuit breakers, three-pole, temperature compensated, rated current 1 A to 25 A Part 001: Technical specification EN 3774-001, Aerospa

13、ce series Circuit breakers, three-pole, temperature compensated, rated current 1 A to 25 A Part 001: Technical specification EN 3841-305, Aerospace series Circuit breakers Test Methods Part 305: Short-circuit performance EN 6113, Aerospace series Circuit breaker, connecting and attachment hardware 1

14、)TR 6083, Aerospace series Cut-outs for installation of electrical components 2)FED-STD-595B, Colors used in Government Procurement 3)3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 2350 apply. 4 Dimensions and mass 4.1 Dimensional characteristics The

15、 circuit breakers do not have to correspond to the pictorial illustration, only the dimensions given shall be adhered to. Dimensions are in millimetres with exception terminal thread 8-32 UNC. See Figure 1. 1) Published as ASD-STAN Prestandard at the date of publication of this standard (www.asd-sta

16、n.org). 2) Published as ASD-STAN Technical Report at the date of publication of this standard (www.asd-stan.org). 3) Published by: Department of Defense (DOD), the Pentagon, Washington, D.C. 20301 USA. prEN 3774-004:2012 (E) 4 Key 1 Push button released 2 Black colour according to FED-STD-595B 3 Whi

17、te 4 Marking, see Clause 6. 5 Push button pressed 6 Attachment nut 7 Lock washer 8 1,0 max. to 3,0 max. 9 Positioning lug in accordance with the panel cut-out, as per TR 6083C202 10 Rated current marking (white on black) Figure 1 Configuration Dimensions Tolerances prEN 3774-004:2012 (E) 5 4.2 Elect

18、rical diagram See Figure 2. Push button released: CB open. Push button pressed: CB closed. Key 1 Supply 2 Load Load and supply can be inverted. Figure 2 Electrical diagram 4.3 Mass 63 g max. (delivery code A including hardware). 4.4 Panel mounting See EN 3774-001. 5 Characteristics 5.1 Material, sur

19、face treatment See EN 2996-001. 5.2 Mechanical characteristics 5.2.1 Fasteners See EN 6113. 5.2.2 Recommended tightening torque of attaching nut for installation (4,75 0,25) N.m prEN 3774-004:2012 (E) 6 5.2.3 Recommended tightening torque of connection hardware for installation (1,6 0,1) N.m 5.2.4 R

20、esistance to vibrations 5.2.4.1 Combined test: ambient temperature at 70 C and vibrations Sinusoidal : 10 gn, see EN 3774-001. Random : 5,8 gn, see EN 3774-001. Low frequencies : 10 gn, see EN 3774-001. 5.2.4.2 Combined test: ambient temperature at 85 C, altitude and vibrations Sinusoidal : 3 gn, se

21、e EN 3774-001. 5.2.5 Resistance to shocks 50 gn, see EN 3774-001. 5.2.6 Mechanical endurance See Table 6. 5.3 Environment characteristics 5.3.1 Humidity See EN 3774-001. 5.3.2 Corrosion See EN 3774-001. 5.3.3 Contaminating liquids See EN 3774-001. 5.3.4 Overvoltage caused by lightning See EN 3774-00

22、1. prEN 3774-004:2012 (E) 7 5.4 Electrical characteristics 5.4.1 Nominal voltage of operational circuits See Table 1. Table 1 Nominal voltage 115/200 V a.c., 400 Hz, three phase 5.4.2 Voltage drop at nand low current See Table 2. Table 2 Ratings A 1 2 2,5 3 5 7,5 10 15 20 25 U max. at n V 1,1 0,75 0

23、70 0,55 0,35 0,30 0,30 0,25 0,25 0,20 U max. at 100mA mV 110 40 30 18 8 4 3 2,5 2,5 2,5 NOTE The test shall be performed when the contact is established (no switching). 5.4.3 Minimum and maximum tripping thresholds See Table 3. Table 3 Overload (in % of n) Ambient temperatures Ratings Minimum thres

24、holds value 1 h Maximum thresholds value 1 h C A On ground At 22 000 m On ground 23 5 All 110 105 140 55 5 115 105 160 70 5 105 100 140 90 5 20 and 25 90 80 140 125 5 1 to 15 100 80 140 NOTE 1 For detection of minimum threshold, all the poles are connected in series. NOTE 2 For detection of maximum

25、threshold, load value is: increased by about 20 % when one pole is submitted to the load and other poles are not loaded; increased by about 10 % when two poles are submitted to the load and the other one is not loaded; not increased when the two other poles are loaded at 0,9 n. prEN 3774-004:2012 (E

26、) 8 5.4.4 Overload trip See Table 4. Table 4 Overload (in % of n) 200 500 1 000 3 poles 1 pole 3 poles 1 pole 3 poles 1 pole Ambient temperatures C Ratings A Trip time s 23 5 All 2 to 20 0,15 to 2,30 0,15 to 2,80 0,035 to 0,500 0,035 to 0,600 55 5 40 48 90 5 20 and 25 1,5 1,5 125 5 1 to 15 1,5 1,5 N

27、OTE 1 When 3 poles are loaded, they will be connected in series. NOTE 2 When 1 pole is loaded, the two other poles are not loaded. 5.4.5 Short-circuit values See Table 5. Table 5 Nominal voltage 115 V a.c., 400 Hz Prospective currents 0,8 cos 1 65 nA r.m.s. Test altitudes On the ground and at maximu

28、m altitude 22 000 m (4 000 Pa) Number of operations 1 CO a 2 OCO b 1 CO 2 OCO aBreak operation (for definition refer to EN 3841-305). bMake operation (for definition refer to EN 3841-305).prEN 3774-004:2012 (E) 9 5.4.6 No-load and load endurance See Table 6. Table 6 Number of operations to be provid

29、ed No-load Load5 000 2 500 All ratings Main contacts Applicable Inductive 0,6 cos 0,7 n, 115 V a.c. - 400 Hz NOTE 1 One operation corresponds to one closing one opening. NOTE 2 Tolerances 5 % on current, voltage and frequency values. 5.4.7 Dielectric rigidity See Table 7. Table 7 Closed position Z 0

30、 m Z 22 000 m A1, B1, C1 with attachment 1 500 V 400 V A1, B1, C1 with 3 A1, B1, C1 with 4 A1, A2 with B1, B2 and C1, C2 B1, B2 with A1, A2 and C1, C2 Open position Z 0 m Z 22 000 m 1 with 2 1 500 V 400 V A1, B1, C1, A2, B2, C2 with attachment 3 and 4 with A1, B1, C1 3 and 4 with A2, B2, C2 A1, A2 w

31、ith B1, B2 and C1, C2 B1, B2 with A1, A2 and C1, C2 5.4.8 Insulation resistance According to EN 3774-001, Table 5. prEN 3774-004:2012 (E) 10 6 Designation EXAMPLE Description block CIRCUIT BREAKER Identity block EN3774-004D20AA Number of EN standard Design code, D: black button Rated current code (s

32、ee Table 8) Delivery hardware code A (see Table 9) NOTE If necessary, the code I9005 shall be placed between the description block and the identity block. 7 Rated current code See Table 8. Table 8 Ratings n1 2 2,5 3 5 7,5 10 15 20 25 Marking on actuator 1 2 2 3 5 7 10 15 20 25 Rated current code 01A

33、 02A 2A5 03A 05A 7A5 10A 15A 20A 25A 8 Delivery codes See Table 9. Table 9 Delivery hardware code Connection and attachment hardware kits EN 6113 Delivery conditions Kit part-No. aIncluded parts Pieces per part Fitted Supplied separately A EN 6113C1 Connecting screw 6 X Connecting lock washer 6 Atta

34、chment nut 1 Attachment lock washer 1 B EN 6113B1 Attachment nut 1 X Attachment lock washer 1 aSpare parts could be ordered separately, informations see EN 6113. prEN 3774-004:2012 (E) 11 9 Marking As defined on the drawing and unless otherwise specified by contract, marking shall include: the desig

35、nation defined in Clause 6 on the packaging; the manufacture date (year, week): YYWW; the manufacturers name or trademark; the electrical diagram and the terminal identification; the manufacturers part number. NOTE The marking could be combined on the both opposite faces. For electrical diagram and/or terminal identification refer to the Figure 2. 10 Technical specification See EN 3774-001.