1、AECMA STANDARD NORME AECMA AECMA NORM prEN 2996-004 Edition P 3 May 2005 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION Gulledelle 94 - B-1200 Brussels - Tel. + 32 2 775 8110 - Fax. + 32 2 775 8111 - www.aecma-stan.orgICS: 49.060 Supersedes edition P 2 January 1999 D
2、escriptors: ENGLISH VERSION Aerospace series Circuit breakers, three-pole, temperature compensated, rated current 1 A to 25 A Part 004: With signal contact Product standard Srie arospatiale Disjoncteurs tripolaires compenss en temprature, intensits nominales 1 A 25 A Partie 004 : Avec contact de sig
3、nalisation Norme de produit Luft- und Raumfahrt Schutzschalter, dreipolig, Temperaturkompensiert, Nennstrme von 1 A bis 25 A Teil 004: Mit Signalkontakt Produktnorm This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA-STAN (The European Association of Aerospace Ind
4、ustries - 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 Prestandard, the technical content shall not be changed to an extent
5、that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review by users and formal agreement of AECMA-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vo
6、te 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. Edition approved for publication 31 May 2005 Comments s
7、hould be sent within six months after the date of publication to AECMA-STAN Electrical Domain Copyright 2005 by AECMA-STAN prEN 2996-004:20052 Foreword This standard was reviewed by the Domain Technical Coordinator of AECMA-STANs Electrical Domain. After inquiries and votes carried out in accordance
8、 with the rules of AECMA-STAN defined in AECMA-STANs General Process Manual, this standard has received approval for Publication. Contents Page 1 Scope 3 2 Normative references. 3 3 Dimensions and mass. 3 4 Characteristics. 5 5 Designation 9 6 Rated current code 10 7 Delivery codes 10 8 Marking. 11
9、9 Technical specification 11 prEN 2996-004:20053 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 at a temperature between 55 C and 125 C for ratings 15 A and 55 C to
10、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 with a signal contact which is open when main contacts are closed, and inversely. They will continue to function up
11、 to the short-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) appl
12、ies. EN 2996-001, Aerospace series Circuit breakers, three-pole, temperature compensated, rated current 1 A to 25 A Part 001: Technical specification. 1)EN 3155-016, Aerospace series Electrical contacts used in elements of connection Part 016 : Contacts, electrical, male, type A, crimp, class S Prod
13、uct standard.1)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 6083, Aerospace series Cut-outs for installation of electrical components. 2)MIL-I-81969/1A, Installing
14、and removal tools, connector electrical contact, type III, class 2, composition C. 3)MIL-I-81969/14C, Installing and removal tools, connector electrical contact, type III, class 2, composition B. 3)FED-STD-595B, Colours used in Government Procurement. 3 Dimensions and mass 3.1 Dimensional characteri
15、stics The circuit breakers do not have to correspond to the pictorial illustration, only the dimensions given shall be adhered to. Dimensions are in millimetres. See Figure 1. 1) Published as AECMA Prestandard at the date of publication of this standard. 2) Published as AECMA Technical Report at the
16、 date of publication of this standard. 3) Published by: Department of Defense (DOD), the Pentagon, Washington D.C. 20301 USA. prEN 2996-004:20054 Key 1 Push button released 10 1 to 3 max. 2 Green colour according to FED-STD-595B No. 34090 11 3 White Gauge 20 connection pins according to EN3155-016M2
17、018 4 Marking area, see Clause 8. 12 Indicative value 25 (see note) 5 Circuits deviding partition 13 Rated current marking (white on green) 6 Connecting screw and washer 14 7 Push button pressed Positioning lug in accordance with the panel cut-out, as per TR6083C202 8 Lockwasher 15 Terminals shape f
18、ree 9 Attachment nut F1 and F2: see EN 2996-001, Table 3. NOTE Tools noted in subclause 4.2.4 shall be applied without interfering with the terminal 2 connection. Even if the circuit breakers are grouped. Figure 1 Configuration Dimensions Tolerances 341,50-0,5234,6 min.50,5 A12439 8,4 0,3C2B2A2C1B1A
19、115,8max.0,5A16,5 max.12,8 0,517,5 215 0,8 15 0,80,5 AF2F11530 max.26,5 max.20 max.138 min.1013 0,5M12 x 13 min.6,350,42,5 0,318,5131 0,819,5 max.3max.6453453A7 min.5 0,536 247 max.F1 and F2 : see EN 2996-001 table 3A2 B2 C2814 10,2 0,317119,8 max.prEN 2996-004:20055 3.2 Electrical diagram See Figur
20、e 2. Terminal No.: 1 and 2: Main contacts 3 and 4: Signal contacts Figure 2 Electrical diagram 3.3 Mass 64 g max. (delivery code A including hardware). 3.4 Panel mounting See EN 2996-001. 4 Characteristics 4.1 Material, surface treatment See EN 2996-001. 4.2 Mechanical characteristics 4.2.1 Fastener
21、s See EN 6113. 4.2.2 Recommended tightening torque of attaching nut for installation (4,75 0,25) Nm 4.2.3 Recommended tightening torque of connection hardware for installation (1,6 0,1) Nm A2 A1B2 B1C2 C134Push-button releasedA2 A1B2 B1C2 C134Push-button pressedprEN 2996-004:20056 4.2.4 Recommended
22、tools for contacts of auxiliary contact insertion and extraction plastic MIL-I-81969/14-11; metallic MIL-I-81969/1-02. 4.2.5 Resistance to vibrations 4.2.5.1 Combined test: ambient temperature at 70 C and vibrations Sinusoidal: 10 gn, see EN 2996-001. Random: 5,8 gn, see EN 2996-001. Low frequencies
23、: 10 gn, see EN 2996-001. 4.2.5.2 Combined test: ambient temperature at 85 C, altitude and vibrations Sinusoidal: 3 gn, see EN 2996-001. 4.2.6 Resistance to shocks 50 gn, see EN 2996-001. 4.2.7 Mechanical endurance See Table 6. 4.3 Environment characteristics 4.3.1 Humidity See EN 2996-001. 4.3.2 Co
24、rrosion See EN 2996-001. 4.3.3 Contaminating liquids See EN 2996-001. 4.3.4 Overvoltage caused by lightning See EN 2996-001. 4.4 Electrical characteristics 4.4.1 Nominal voltages of main contacts See Table 1. Table 1 Nominal voltage 115/200 V a.c., 360 Hz to 800 Hz prEN 2996-004:20057 4.4.2 Voltage
25、drop at nand at 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 0,70 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 Signal circuit : 28 V d.c.; I = 3 mA : U 0,3 mV. NOTE When a signal contact has been operated with
26、 a power greater than 60 mW and/or with a voltage higher than 28 V d.c., it loses its low current quality. 4.4.3 Minimum and maximum tripping thresholds See Table 3. Table 3 Overload (in % of n) Minimum thresholds value 1 h Maximum thresholds value 1 h Ambient temperatures C Ratings On ground At 22
27、000 m On ground 23 5 110 105 140 55 5 115 105 160 70 5 All 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 threshold, load value is: - increased by about 20 % when one pole
28、 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 2996-004:20058 4.4.4 Overload trip See Table 4. Table 4 Overload (in % of n
29、) 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 2 to 20 55 5 All 40 48 90 5 20 and 25 1,5 1,5 125 5 1 to 15 1,5 1,5 0,15 to 2,30 0,15 to 2,80 0,035 to 0,500 0,035 to 0,600 NOTE 1 When 3 poles are loaded, they will be connected in series.
30、 NOTE 2 When 1 pole is loaded, the two other poles are not loaded. 4.4.5 Short-circuit values See Table 5. Table 5 Nominal voltage 115 / 200 V a.c., 360 Hz to 800 Hz 0,8 cos 1 Prospective currents 65 nor 1 000 A r.m.s. (value the most favourable) Test altitudes On the ground and at maximum altitude
31、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). 4.4.6 No-load and load endurance See Table 6. prEN 2996-004:20059 Table 6 Number of operations to be provided No-load
32、Load 5 000 2 500 Main contacts Applicable Inductive 0,6 cos 0,7 n, 115 / 200 V a.c. - 360 Hz to 800 Hz All ratings Signal contacts Applicable Resistive 0,5 A, 28 V d.c.Resistive 3 mA, 28 V d.cResistive 3 mA, 5 V d.cLamp 0,2 A, 28 V d.c. Lamp 0,23 A, 5 V a.c.NOTE 1 One operation corresponds to one cl
33、osing + one opening. NOTE 2 Tolerances 5 % on current, voltage and frequency values. 4.4.7 Dielectric rigidity See Table 7. Table 7 Closed position Z = 0 m Z = 22 000 m A1, B1, C1 with attachment 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 1 500 V
34、400 V 3 with 4 3 and 4 with attachment 500 V 150 V Open position Z = 0 m Z = 22 000 m 1 with 2 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 1 500 V 400 V 3 and 4 with attachment 500 V 150 V 4.4.8 In
35、sulation resistance According to EN 2996-001, Table 5. prEN 2996-004:200510 5 Designation EXAMPLE Description block CIRCUIT BREAKER Identity block EN2996-004A20AA Number of EN standard Design code, A: green button Rated current code (see Table 8) Delivery code A (see Table 9) NOTE If necessary, the
36、code I9005 shall be placed between the description block and the identity block. 6 Rated current code See Table 8. Table 8 Rating current n (A) 1 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 02A 2A5 03A 05A 7A5 10A 15A 20A 25A 7 Delivery codes See Tabl
37、e 9. Table 9 Connection and attachment hardware kits EN 6113 Delivery conditions Delivery code Kit part-No. aIncluded parts Pieces per part Fitted Supplied separately Connecting screw 6 Connecting lockwasher 6 Attachment nut 1 A EN6113C1 Attachment lockwasher 1 X Attachment nut 1 B EN6113B1 Attachme
38、nt lockwasher 1 X aSpare parts could be ordered separately, informations see EN 6113. prEN 2996-004:200511 8 Marking As defined on the drawing and unless otherwise specified by contract, marking shall include: the designation defined in Clause 5 (without delivery hardware code), on the packaging; th
39、e manufacture date (year, week); the manufacturers name or trademark; the electrical diagram (for auxiliary contact) and the pin terminal identification; the manufacturers part number (corresponding to the part number which includes connection and attachment hardware supplied separately in a bag). NOTE The marking could be on both opposite sides. For electrical diagram printed on the circuit breaker and/or terminal identification numbers see Figure 1. 9 Technical specification See EN 2996-001.
