1、BSI Standards PublicationBS EN 3773-004:2014Aerospace series Circuitbreakers, single-pole,temperature compensated,rated currents 1 A to 25 APart 004: UNC thread terminals ProductstandardBS EN 3773-004:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 3773-004
2、:2014.It supersedes BS EN 3773-004:1999 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/6, Aerospace avionic electrical and fibre optictechnology.A list of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 p
3、ublication 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 83452 3ICS 49.060Compliance with a British Standard cannot confer immunity
4、fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 October 2014.Amendments issued since publicationDate Text affectedBS EN 3773-004:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3773-004 October 2014 ICS 49.060
5、 Supersedes EN 3773-004:1999English Version Aerospace series - Circuit breakers, single-pole, temperature compensated, rated currents 1 A to 25 A - Part 004: UNC thread terminals - Product standard Srie arospatiale - Disjoncteurs unipolaires compenss en temprature, intensits nominales 1 A 25 A - Par
6、tie 004 : Bornes filetage UNC - Norme de produit Luft- und Raumfahrt - Schutzschalter, einpolig, 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/
7、CENELEC 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 Cent
8、re or 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
9、 official 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, Netherl
10、ands, 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 right
11、s of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3773-004:2014 EBS EN 3773-004:2014EN 3773-004:2014 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Dimensions and mass .4 5 Characteristics .6 6 Desi
12、gnation . 11 7 Rated current code . 11 8 Delivery hardware codes . 11 9 Marking 12 10 Technical specification 12 BS EN 3773-004:2014EN 3773-004:2014 (E) 3 Foreword This document (EN 3773-004:2014) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-
13、STAN). After enquiries and votes 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 st
14、atus of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2015, and conflicting national standards shall be withdrawn at the latest by April 2015. Attention is drawn to the possibility that some of the elements of this document may be the subje
15、ct of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 3773-004:1999. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement th
16、is European Standard: 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, Norway, Poland, Portugal, Romania, Slovak
17、ia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 3773-004:2014EN 3773-004:2014 (E) 4 1 Scope This European Standard specifies the characteristics of single-pole circuit breakers, temperature compensated with a rated current from 1 A to 25 A, used in aircraft on-board ci
18、rcuits at a temperature between 55 C and 125 C and at an altitude of 22 000 m max. These circuit breakers are operated by a push-pull type single push button (actuator), with delayed action “trip-free“ tripping. They will continue to function up to the short-circuit current. 2 Normative references T
19、he 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 amendments) applies. EN 2350,
20、 Aerospace series Circuit breakers Technical specification EN 2282, Aerospace series Characteristics of aircraft electrical supplies EN 3773-001, Aerospace series Circuit breakers, single-pole, temperature compensated, rated currents 1 A to 25 A Part 001: Technical specification EN 6113, Aerospace s
21、eries Circuit breaker, connecting and attachment hardware 1)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
22、. 4 Dimensions and 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. See Figure 1. Dimensions are in millimetres with exception terminal thread 8-32 UNC. 1) Published as ASD-STAN Prestanda
23、rd at the date of publication 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 3773-004:2014EN 3773-
24、004:2014 (E) 5 Key 1 Push button released 2 Black colour according to FED-STD-595B 3 White 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 o
25、n black) Figure 1 Circuit breaker BS EN 3773-004:2014EN 3773-004:2014 (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 26 g max. (delivery hardware code
26、A). 4.4 Panel mounting See EN 3773-001. 5 Characteristics 5.1 Material, surface treatment See EN 3773-001. 5.2 Mechanical characteristics 5.2.1 Fasteners See EN 6113. BS EN 3773-004:2014EN 3773-004:2014 (E) 7 5.2.2 Recommended tightening torque of attaching nut for installation (4,00 0,25) N.m 5.2.3
27、 Recommended tightening torque of connection 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 3773-001. Random: 5,8 gn,see EN 3773-001. Low frequencies : 10 gn, see EN 3773-001. 5.2.4.2
28、 Combined test: ambient temperature at 85 C, altitude and vibrations Sinusoidal : 3 gn, see EN 3773-001. 5.2.5 Resistance to shocks 50 gn, see EN 3773-001. 5.2.6 Mechanical endurance See Table 6. 5.3 Environment characteristics 5.3.1 Humidity See EN 3773-001. 5.3.2 Corrosion See EN 3773-001. 5.3.3 C
29、ontaminating liquids See EN 3773-001. 5.3.4 Overvoltage caused by lightning See EN 3773-001. BS EN 3773-004:2014EN 3773-004:2014 (E) 8 5.4 Electrical characteristics 5.4.1 Nominal voltage of operational circuits See Table 1. Table 1 Nominal voltage 28 V d.c. 26 V a.c., frequency 400 Hz, single-phase
30、 115 V a.c., frequency 400 Hz, single-phase When using on a variable frequency aircraft power supply, according to EN 2282, limit values (for voltage and frequency) shall be specified. 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
31、0 0,75 0,70 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 Min
32、imum thresholds value 1 h Maximum thresholds value 1 h C A On ground At 22 000 m On ground 23 5 All 115 105 140 55 5 115 105 160 70 5 105 100 140 125 5 100 80 140 BS EN 3773-004:2014EN 3773-004:2014 (E) 9 5.4.4 Overload trip See Table 4. Table 4 Overload (in % of n) 200 500 1 000 Ambient temperature
33、s C Ratings A Trip time s 23 5 1 to 3 2 to 13 0,15 to 2,50 0,035 to 0,600 5 to 15 4 to 18 20 to 25 6 to 20 55 5 All 40 125 5 1,5 5.4.5 Short-circuit values See Table 5. Table 5 Nominal voltage 28 V d.c. 115 V a.c., 400 Hz Prospective currents 65 nL/R 1 ms 0,8 cos 1 65 nor 1 000 A r.m.s. (value the m
34、ost favourable) 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 aRemoval of short-circuit. bApplication of a short-circuit.BS EN 3773-004:2014EN 3773-004:2014 (E) 10 5.4.6 No-Load and load endurance See Table 6. Table 6 Numb
35、er of operations to be provided No-load Load 5 000 2 500 2 500 2 500 2 500 All ratings Main contacts Applicable Resistive Low current 100 mA, 28 V d.c. (rating 3 A) Resistive n, 28 V d.c. Inductive L/R = 5 ms n, 28 V d.c. Inductive 0,6 cos 0,7 n, 115 V a.c. - 400 Hz NOTE 1 One operation corresponds
36、to one closing and 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 m Z = 22 000 m 1 and 2 with attachment 1 500 V 400 V Open position Z = 0 m Z = 22 000 m 1 with 2 1 and 2 with attachment 1 500 V 400 V
37、5.4.8 Insulation resistance 100 M (measurement points identical to dielectric rigidity points). 5.4.9 Overload endurance Not applicable. BS EN 3773-004:2014EN 3773-004:2014 (E) 11 6 Designation EXAMPLE Description block CIRCUIT BREAKER Identity block EN3773-004D20AA Number of this standard Design co
38、de, D: black button Rated current code (see 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
39、 3 5 7 10 15 20 25 Rated current code 01A 02A 2A5 03A 05A 7A5 10A 15A 20A 25A 8 Delivery hardware 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 6113A1
40、Connecting screw 2 X Connecting lock washer 2 Attachment 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.BS EN 3773-004:2014EN 3773-004:2014 (E) 12 9 Marking As defined on the drawing and unless
41、 otherwise specified by contract, marking shall include: the designation defined in Clause 6 (without delivery hardware code), on the packaging; the manufacture date (year, week): YYWW; the manufacturers name or trademark; the pin terminal identification; the manufacturers part number. NOTE The mark
42、ing could be combined on the both opposite faces. For electrical diagram and/or terminal identification refer to the Figure 1. 10 Technical specification See EN 3773-001. This page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related
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