1、AECMA STANDARD NORME AECMA AECMA NORM prEN 2995-004 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, single-pole, temperature compensated, rated current 1 A to 25 A Part 004: With signal contact Product standard Srie arospatiale Disjoncteurs unipolaires compenss en temprature, intensits nominales 1 A 25 A Partie 004 : Avec contact de si
3、gnalisation Norme de produit Luft- und Raumfahrt Schutzschalter, einpolig, 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 2995-004:20052 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. 10
9、9 Technical specification 10 prEN 2995-004:20053 1 Scope This 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 circuits at a temperature between 55 C and 125 C and at an altitude of 22 000
10、 m max. These circuit breakers are operated by a push-pull type single push button (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 to the short-circuit current. 2 Normative refere
11、nces 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 2995-001, Aerospace series Circuit breake
12、rs, single-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 Product standard.1)EN 6113, Aerospace series Circuit
13、 breaker, connecting and attachment hardware. 1)TR 6083, Aerospace series Cut-outs for installation of electrical components. 2)MIL-I-81969/1A, Installing and removal tools, connector electrical contact, type III, class 2, composition C. 3)MIL-I-81969/14C, Installing and removal tools, connector ele
14、ctrical contact, type III, class 2, composition B. 3)FED-STD-595B, Colours used in Government Procurement. 3 Dimensions and mass 3.1 Dimensional characteristics The circuit breakers do not have to correspond to the pictorial illustration, only the dimensions given shall be adhered to. Dimensions are
15、 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 date of publication of this standard. 3) Published by: Department of Defense (DOD), the Pentagon, Washington D.C. 20301 USA. prEN 2995-004:20054
16、 Key 1 Push button released 9 2 Green colour according to FED-STD-595B No. 34090 Gauge 20 connection pins according to EN3155-016M2018 3 White 10 Indicative value 25 (see note) 4 Marking area, see Clause 8. 11 Marking, see Clause 6. 5 Push button pressed 12 6 Attachment nut Positioning lug in accord
17、ance with the panel cut-out, as per TR6083C202 7 Lockwasher 13 Rated current marking (white on green) 8 1,0 to 3,0 max. 14 Terminals shape free F1 and F2: see EN 2995-001, Table 3. NOTE Tools noted in subclause 4.2.4 shall be applied without interfering with the terminal 2 connection. Even if the ci
18、rcuit breakers are grouped. Figure 1 Configuration - Dimensions - Tolerances prEN 2995-004:20055 3.2 Electrical diagram See Figure 2. Terminal No.: 1 and 2: Main contacts 3 and 4: Signal contacts Figure 2 Electrical diagram 3.3 Mass 28 g max. (delivery code A including hardware). 3.4 Panel mounting
19、See EN 2995-001. 4 Characteristics 4.1 Material, surface treatment See EN 2995-001. 4.2 Mechanical characteristics 4.2.1 Fasteners 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 installa
20、tion (1,6 0,1) Nm 4.2.4 Recommended tools for contacts of auxiliary contact insertion and extraction plastic MIL-I-81969/14-11; metallic MIL-I-81969/1-02. 34213421Push-button released Push-button pressedprEN 2995-004:20056 4.2.5 Resistance to vibrations 4.2.5.1 Combined test: ambient temperature at
21、70 C and vibrations Sinusoidal: 10 gn, see EN 2995-001. Random: 5,8 gn, see EN 2995-001. Low frequencies: 10 gn, see EN 2995-001. 4.2.5.2 Combined test: ambient temperature at 85 C, altitude and vibrations Sinusoidal: 3 gn, see EN 2995-001. 4.2.6 Resistance to shocks 50 gn, see EN 2995-001. 4.2.7 Me
22、chanical endurance See Table 6. 4.3 Environment characteristics 4.3.1 Humidity See EN 2995-001. 4.3.2 Corrosion See EN 2995-001. 4.3.3 Contaminating liquids See EN 2995-001. 4.3.4 Overvoltage caused by lightning See EN 2995-001. 4.4 Electrical characteristics 4.4.1 Nominal voltages of main contacts
23、See Table 1. Table 1 28 V d.c. 26 V a.c., 360 Hz to 800 Hz Nominal voltages 115 V a.c., 360 Hz to 800 Hz prEN 2995-004:20057 4.4.2 Voltage 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 1,10 0,75 0,70 0,55 0,35 0,30 0,30 0,25 0,25 0,20 U max. at
24、= 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 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 Tab
25、le 3. Table 3 Overload (in % of n) Minimum thresholds value 1 h Maximum thresholds value 1 h Ambient temperatures C Ratings On ground At 22 000 m On ground 23 5 115 105 140 55 5 115 105 160 70 5 105 100 140 125 5 All 100 80 140 4.4.4 Overload trip See Table 4. Table 4 Overload (in % of n) 200 500 1
26、000 Ambient temperatures C Ratings A Trip time s 1 to 3 2 to 13 5 to 15 4 to 18 23 5 20 to 25 6 to 20 55 5 40 125 5 All 1,5 0,15 to 2,50 0,035 to 0,600 prEN 2995-004:20058 4.4.5 Short-circuit values See Table 5. Table 5 Nominal voltage 28 V d.c. 115 V a.c., 360 Hz to 800 Hz 0,8 cos 1 Prospective cur
27、rents 65 nL/R 1 ms 65 nor 1 000 A r.m.s. (value the most 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. 4.4.6 No-Load and load endurance See Table 6. T
28、able 6 Number of operations to be provided No-load Load 5 000 2 500 2 500 2 500 2 500 2 500 Main contacts Applicable Resistive Low current 100 mA, 28 V d.c.(rating 3 A) Resistiven, 28 V d.c.Resistive n, 28 V d.c. Inductive L/R = 5 ms n, 28 V d.c. Inductive 0,6 cos 0,7n, 115 V a.c. - 360 Hz to 800 Hz
29、All ratings Signal contacts Applicable Resistive 0,5 A, 28 V d.c. Resistive3 mA, 28 V d.c Resistive 3 mA, 5 V d.c Lamp 0,2 A, 28 V d.c. Lamp 0,23 A, 5 V a.c. NOTE 1 One operation corresponds to one closing and one opening. NOTE 2 Tolerances 5 % on current, voltage and frequency values. prEN 2995-004
30、:20059 4.4.7 Dielectric rigidity See Table 7. Table 7 Closed position Z = 0 m Z = 22 000 m 1 and 2 with attachment 1 and 2 with 3 1 and 2 with 4 1 500 V 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 1 and 2 with attachment 3 and 4 with 1 3 and 4 with
31、2 1 500 V 400 V 3 and 4 with attachment 500 V 150 V 4.4.8 Insulation resistance According to EN 2995-001, Table 5. 5 Designation EXAMPLE Description block CIRCUIT BREAKER Identity block EN2995-004A20AA Number of EN standard Design code, A: green button Rated current code (see Table 8) Delivery code
32、A (see Table 9) NOTE If necessary, the code I9005 shall be placed between the description block and the identity block. prEN 2995-004:200510 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 0
33、2A 2A5 03A 05A 7A5 10A 15A 20A 25A 7 Delivery codes See Table 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 2 Connecting lock washer 2 Attachment nut 1 A EN6113A1 A
34、ttachment lock washer 1 X Attachment nut 1 B EN6113B1 Attachment lock washer 1 X aSpare parts could be ordered separately, informations see EN 6113. 8 Marking As defined on the drawing and unless otherwise specified by contract, marking shall include: the designation defined in Clause 5 (without del
35、ivery hardware code), on the packaging; the 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 2995-001.
