1、BSI Standards PublicationBS EN 3774-004:2014Aerospace series Circuitbreakers, three-pole,temperature compensated,rated currents 1 A to 25 APart 004: UNC thread terminals ProductstandardBS EN 3774-004:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 3774-004:
2、2014.It supersedes BS EN 3774-004:1999 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/6, Aerospace avionic electrical and fibre optictechnology.A list of organizations represented on this committee can beobtained on request to its secretary.This pu
3、blication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 83454 7ICS 49.060Compliance with a British Standard cannot confer immunity f
4、romlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 August 2014.Amendments issued since publicationDate Text affectedBS EN 3774-004:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3774-004 July 2014 ICS 49.060 Supe
5、rsedes EN 3774-004:1999English 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, intensits nominales 1 A 25 A - Partie 00
6、4 : 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 European Standard was approved by CEN on 12 October 2013. CEN members are bound to comply with the CEN/CENEL
7、EC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or
8、 to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the offi
9、cial versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
10、 Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of
11、exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3774-004:2014 EBS EN 3774-004:2014EN 3774-004:2014 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Dimensions and mass .5 4.1 Dimensional characteristics
12、.5 4.2 Electrical diagram 6 4.3 Mass 6 4.4 Panel mounting 6 5 Characteristics .6 5.1 Material, surface treatment .6 5.2 Mechanical characteristics .7 5.2.1 Fasteners 7 5.2.2 Recommended tightening torque of attaching nut for installation 7 5.2.3 Recommended tightening torque of connection hardware f
13、or installation.7 5.2.4 Resistance to vibrations .7 5.2.5 Resistance to shocks 7 5.2.6 Mechanical endurance 7 5.3 Environment characteristics 7 5.3.1 Humidity 7 5.3.2 Corrosion 7 5.3.3 Contaminating liquids .7 5.3.4 Overvoltage caused by lightning .7 5.4 Electrical characteristics 8 5.4.1 Nominal vo
14、ltage of operational circuits 8 5.4.2 Voltage drop at nand low current .8 5.4.3 Minimum and maximum tripping thresholds 8 5.4.4 Overload trip .9 5.4.5 Short-circuit values .9 5.4.6 No-load and load endurance . 10 5.4.7 Dielectric rigidity . 10 5.4.8 Insulation resistance 10 6 Designation . 11 7 Rate
15、d current code . 11 8 Delivery codes . 11 9 Marking 12 10 Technical specification 12 BS EN 3774-004:2014EN 3774-004:2014 (E) 3 Foreword This document (EN 3774-004:2014) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and v
16、otes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard,
17、 either by publication of an identical text or by endorsement, at the latest by January 2015, and conflicting national standards shall be withdrawn at the latest by January 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN
18、 and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 3774-004:1999. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Au
19、stria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Swe
20、den, Switzerland, Turkey and the United Kingdom. BS EN 3774-004:2014EN 3774-004:2014 (E) 4 1 Scope This European 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 at a temperature b
21、etween 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 short-circuit current.
22、 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amen
23、dments) applies. 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, Aerospace series - Circuit breakers, three-pole, t
24、emperature compensated, rated currents 2 A to 25 A, switching capacity 25 /n - 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)TR 60
25、83, 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. 1)Published as ASD-STAN Prestandard at the date of publication
26、of this standard. http:/www.asd-stan.org/ 2) Published as ASD-STAN Technical Report at the date of publication of this standard. http:/www.asd-stan.org/ 3)Published by: DoD National (US) Mil. Department of Defense. http:/www.defenselink.mil/ BS EN 3774-004:2014EN 3774-004:2014 (E) 5 4 Dimensions and
27、 mass 4.1 Dimensional characteristics The 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. Key 1 Push button released 6 Attachment nut 2 Black
28、colour according to FED-STD-595B 7 Lock washer 3 White 8 1,0 max. to 3,0 max 4 Marking, see Clause 6 9 Positioning lug in accordance with the panel cut-out, as per TR 6083C202 5 Push button pressed 10 Rated current marking (white on black) Figure 1 Configuration Dimensions Tolerances BS EN 3774-004:
29、2014EN 3774-004:2014 (E) 6 4.2 Electrical 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.
30、 5 Characteristics 5.1 Material, surface treatment See EN 2996-001. BS EN 3774-004:2014EN 3774-004:2014 (E) 7 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 5.2.3 Recommended tightening torque of conne
31、ction hardware for installation (1,6 0,1) N.m 5.2.4 Resistance 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 a
32、t 85 C, altitude and vibrations Sinusoidal : 3 gn, see 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.
33、 5.3.4 Overvoltage caused by lightning See EN 3774-001. BS EN 3774-004:2014EN 3774-004:2014 (E) 8 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.
34、Table 2 Ratings A 1 2 2,5 3 5 7,5 10 15 20 25 U max. at nV 1,1 0,75 0,70 0,55 0,35 0,30 0,30 0,25 0,25 0,20 U max. at = 100 mA 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.
35、 Table 3 Overload (in % of n) Ambient temperatures Ratings Minimum thresholds value 1 h Maximum thresholds value 1 h C A On ground At 22 000 m On ground 23 5 110 105 140 55 5 Al 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,
36、all the poles are connected in series. NOTE 2 For detection of maximum 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 increa
37、sed when the two other poles are loaded at 0,9 n. BS EN 3774-004:2014EN 3774-004:2014 (E) 9 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
38、 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 NOTE 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 H
39、z Prospective currents 0,8 cos 1 65 nA r.m.s. Test altitudes On the ground and at maximum 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 3841305). bMake operation (for definition refer to EN 3841305). BS EN 3774-004:2014EN
40、 3774-004:2014 (E) 10 5.4.6 No-load and load endurance See Table 6. Table 6 Number of operations to be provided No-load Load 5 000 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
41、5 % on current, voltage and frequency values. 5.4.7 Dielectric rigidity See Table 7. Table 7 Closed position Z = 0 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
42、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 with 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. BS EN 3774-004:2014EN 3774-004:2014 (E) 11 6 Designation EXAMPLE
43、NOTE If necessary, the code I9005 shall be placed between the description block and the identity block. 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 actuato
44、r 1 2 21/2 3 5 71/2 10 15 20 25 Rated current code 01A 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 EN 6113C
45、1 Connecting screw 6 A Connecting lock washer 6 X Attachment nut 1 Attachment lock washer 1 B EN 6113B1 Attachment nut 1 X Attachment lock washer 1 aSpare parts could be ordered separately, information see EN 6113. BS EN 3774-004:2014EN 3774-004:2014 (E) 12 9 Marking As defined on the drawing and un
46、less otherwise specified by contract, marking shall include: the designation 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 cou
47、ld 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. This page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related public
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