1、BRITISH STANDARD AEROSPACE SERIES BSG261-1: 1996 ISO5867-1: 1996 Specification for Aircraft Electromagnetic relays and contactors Part1: General requirements ICS 49.060BSG261-1:1996 This BritishStandard, having been prepared under the directionof the Engineering SectorBoard, was published underthe a
2、uthority of the Standards Board and comes intoeffect on 15July1996 BSI01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/6 Draft for comment94/706953DC ISBN 0 580 25676 6 Committees responsible for this BritishStandard The preparation of this BritishSta
3、ndard was entrusted to Technical Committee ACE/6, Aerospace avionic, electrical and fibre-optic technology, upon which the following bodies were represented: British Airways British Cable Makers Confederation British Rubber Manufacturers Association Civil Aviation Authority (Airworthiness Division)
4、Federation of the Electronics Industry Ministry of Defence Society of British Aerospace Companies Amendments issued since publication Amd. No. Date CommentsBSG261-1:1996 BSI 01-2000 i Contents Page Committees responsible Inside front cover National foreword iii 1 Scope 1 2 Normative references 1 3 D
5、efinitions 1 4 General requirements 1 5 Performance detail requirements 6 6 Tests 12 7 Qualification 37 Annex A (informative) Example of an individual specification sheet 41 Annex B (informative) Bibliography 42 Figure 1 Inspection aid 7 Figure 2 Contact bounce (typical circuit) 14 Figure 3 Electrom
6、agnetic interference test circuit 16 Figure 4 Typical transient voltage 17 Figure 5 Range curve for vibration tests 23 Figure 6 Standard random vibration test curves for equipmentinstalledinfixed-wing aircraft with turbojet engines 24 Figure 7 Standard sinusoidal vibration test curves for equipmenti
7、nstalledinfixed-wing aircraft with turbojet engines 25 Figure 8 Standard sinusoidal vibration test curves for equipmentinstalledinfixed-wing aircraft with reciprocating orturbopropellerengines 26 Figure 9 Standard sinusoidal vibration test curves for equipmentinstalledinhelicopters 27 Figure 10 Robu
8、st random vibration test curves for equipmentinstalledinfixed-wing aircraft with turbojet engines 28 Figure 11 Test circuit, three-phase load transfer 33 Figure 12 Alternative test circuit, three-phase load transfer 34 Table 1 Strength of threaded terminals 2 Table 2 Contact arrangements, symbols an
9、d terminal marking 3 Table 3 Auxiliary terminals 4 Table 4 Symbols and marking for terminals 4 Table 5 Dual coil markings 4 Table 6 Dissimilar metals 5 Table 7 Contact circuit voltage drop 9 Table 8 Minimum values for high voltage tests 9 Table 9 Pull force 18 Table 10 Categorization of standard vib
10、ration test requirementsbyaircrafttypes and equipment locations 22 Table 11 Categorization of severe vibration test requirements forfixed-wingturbojet engine aircraft and equipment locations 22 Table 12 Overload values and durations 30 Table 13 Rupture values and durations 30 Table 14 Duty cycle 31
11、Table 15 Contact voltage drop 32 Table 16 32 Table 17 Contaminant test temperatures 34 Table 18 35BSG261-1:1996 ii BSI 01-2000 Page Table 19 35 Table 20 Production acceptance tests 38 Table 21 Qualification inspection 39 List of references Inside back coverBSG261-1:1996 BSI 01-2000 iii National fore
12、word This BritishStandard has been prepared by Technical Committee ACE/6 and isidentical with ISO5867-1:1996 AircraftElectromagnetic relays and contactorsPart1: General requirements, published by the International Organization for Standardization (ISO). The Technical Committee has reviewed the provi
13、sions of ISO1540:1984, IEC50(446):1990 and IEC158-2:1982 to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A British Standard does not purport to include all the necessary provisions of a contract. Users of British S
14、tandards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Publication referred to Corresponding BritishStandard ISO7137:1995 BS4G229:1996 Schedule for environmental conditions and test proced
15、ures for airborne equipment (Identical) IEC68-2-17:1994 BS EN60068 Environmental testing BS60068-2 Test methods BS EN60068-2-17:1995 Test Q. Sealing (Identical) Summary of pages This document comprises a front cover, an inside front cover, pagesi toiv, pages1to42, an inside back cover and a back cov
16、er. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.iv blankBSG261-1:1996 BSI 01-2000 1 1 Scope This part of ISO5867 specifies the performance requirements for electromagnetic relays
17、 andcontactors for use in nominal28V d.c. or115V/200V3-phase,400Hz, a.c. systems having the characteristics specified in ISO1540. This part of ISO5867 specifies the performance requirements for relays and contactors having nominal contact ratings of5A a.c.,5A d.c. or greater. Auxiliary contacts, whe
18、re applicable, may be rated at lower currents. Three temperature classes and three classes of sealing are specified. This part of ISO5867 is applicable to single-pole and multi-pole relays and contactors, electromagnetically operated and magnetically held, or electromagnetically operated and mechani
19、cally or magnetically latched, controlled bya voltage of28V d.c. or115V,400Hz, a.c. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO5867. At the time of publication, the editions indicated were valid. A
20、ll standards are subject to revision, and parties to agreements based on this part of ISO5867 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO
21、1540:1984, AerospaceCharacteristics of aircraft electrical systems. ISO7137:1995, AircraftEnvironmental conditions and test procedures for airborne equipment. IEC50(446):1990, International Electrotechnical VocabularyChapter446: Electrical relays. IEC68-2-17:1994, Basic environmental testing procedu
22、resPart2: TestsTest Q: Sealing. IEC158-2:1982, Low-voltage controlgear Part2:Semiconductor contactors (solid state contactors). 3 Definitions For the purposes of this part of ISO5867, the definitions given in IEC50(446) and IEC158-2 apply. 4 General requirements 4.1 Detail specification sheets The i
23、ndividual item requirements shall be as specified in this part of ISO5867 and in accordance with the detail specification sheets related to this part of ISO5867. In the event of any conflict between requirements of this part of ISO5867 and the detail specification sheets, the latter shall govern. Th
24、e manufacturer shall prepare an individual specification sheet for each type of device produced. The individual specification sheet shall define the values for parameters given in Annex A. 4.2 Temperature class The temperature classes which define the maximum and minimum temperatures for use shall b
25、e as follows: Class A:65 C to+125 C Class B:55 C to+85 C Class C:55 C to+70 C 4.3 Sealing Enclosure design shall be classified as follows: Class1: Hermetically sealed Class2: Environmentally sealed Class3: Ventilated enclosed 4.4 Altitudes Class1 and2 sealed relays and contactors shall besuitable fo
26、r use up to an altitude of25000m. Class3 contactors shall be suitable for use up to analtitude of15000m. 4.5 Dimensions Relay and contactor dimensions shall be as defined in the detail specification sheet (see4.1). 4.6 Design requirements The relays and contactors shall operate satisfactorily when m
27、ounted in any attitude. Thesize and mass shall be the minimum compatible with the required performance, reliability and strength. The relays and contactors shall be of the single-pole or multi-pole (main contacts) type, with or without auxiliary contacts. The auxiliary contacts shall be mechanically
28、 linked to the main contacts and shall indicate the position of the main contacts.BSG261-1:1996 2 BSI 01-2000 Suitable barriers shall be placed between the terminals of the contactors in order to prevent an accidental short-circuit. These barriers shall be sufficient to prevent the short-circuiting
29、of all the terminals through the presence of a flat conducting part. The coil of the relay or contactor shall operate from either, but not both, a28V d.c. or115V a.c.,400Hz system having the characteristics specified in ISO1540. The contacts of relays or contactors shall be capableof switching28V d.
30、c. and/or115V/200V a.c.,400Hz having a system characteristic specified in ISO1540. 4.7 Sealing enclosures Sealing enclosures shall be of sufficient mechanical strength to withstand the normal abuse incurred in handling, transit, storage and installation without causing malfunction or distortion of p
31、arts. The case shall not be a part of the contact or coil electrical circuits. NOTE 1The case may be a part of the magnetic circuit. 4.7.1 Hermetically sealed enclosures Hermetically sealed enclosures shall be constructed as a gastight enclosure that has been completely sealed by fusion of glass or
32、ceramic to metal, or bonding of metal to metal. Hermetically sealed relays and contactors shall be purged of all air. Relays shall be filled with a suitable inert gas. The fill gas shall have a dew point of at least5 C below the lowest temperature rating of the device. NOTE 2Contactors may be filled
33、 with air or with inert gas. 4.7.2 Environmentally sealed enclosures Environmentally sealed enclosures shall be constructed by any means other than that defined in4.7.1 to achieve the degree of seal specified in the detail specification (see4.1). Environmentally sealed relays and contactors shall be
34、 purged of all air. Relays shall be filled with a suitable inert gas. The fill gas shall have a dew point of at least5 C below the lowest temperature rating of the device. NOTE 3Contactors may be filled with air or with inert gas. 4.7.3 Ventilated enclosures Ventilated contactors shall be totally en
35、closed formechanical and dust protection and shall be explosion-proof. The enclosure shall be so designed that when the cover is removed, the contactor shall be capable of operating without adjustment. The enclosure design shall be such that pressure differentials cannot exist between the inside and
36、 outside to aggravate the moisture accumulation problem. The cover shall be rugged in design, constructed of high impact materials, and securely mounted to the contactor. 4.8 Installation clearances Adequate clearance shall be provided for installation of terminals and mounting hardware. Clearance f
37、or standard socket wrenches shall be provided. Special installation tools shall be avoided where possible. 4.9 Grounding The mounting shall provide an effective electrical contact to ground when the relay or contactor is mounted. 4.10 Terminals Metal covers shall be provided with a means for groundi
38、ng. Relays and contactors shall have electrical terminals as specified in the detail specification (see4.1). No rotation or other loosening of a terminal shall occur throughout the relay or contactor life. 4.10.1 Terminal type Power terminals of greater than25A rating shall beof the threaded stud ty
39、pe. Terminals rated at25A or less may be plug-in, solder hook, stud orscrew terminals. 4.10.1.1 Threaded terminals and mounting studs Stud terminals shall accept connections using crimped type lugs made of copper or aluminium, orcopper bars. A flat washer having a diameter at least equal to that of
40、the base of the terminal, and aself-locking nut or standard nut with suitable locking washer shall be used on each terminal. No rotation or other loosening of a terminal, or any fixed portion of a terminal, shall be caused by any mechanical forces specified in Table 1 involved in the connection or d
41、isconnection, throughout the life of the relay or contactor. These are maximum values which shall not be exceeded. NOTE 4For installation torque values, seethe detail specification(4.1). Table 1 Strength of threaded terminals (static value of pull and torque) Thread size Force Torque N lbf Nm inlbf
42、No.4-40UNC No.6-32UNC No.8-32UNC No.10-32UNC No.10-24UNC 1/4-28UNC 5/16-24UNF 3/8-24UNF 7/16-20UNF 1/2-20UNF 22,2 133 156 180 180 222 311 445 445 445 5 30 35 40 40 50 70 100 100 100 0,497 1,13 2,26 3,615 3,954 8,474 11,298 16,948 16,948 16,948 4,4 10 20 32 35 75 100 150 150 150BSG261-1:1996 BSI 01-2
43、000 3 Each terminal shall have a terminal seat that shall provide the normal current-conducting path. The diameter of the seat shall not be less than the area necessary to ensure that the current density does not exceed1,5510 6 A/m 2(1000A/in 2 ). NOTE 5The seat does not include the cross-sectional
44、area of the stud. Stud terminals shall be capable of accommodating two lugs with hardware as specified. A minimum ofone and a half threads shall remain above the nutwith all parts tightened in place. 4.10.1.2 Solder hook or straight terminals Solder terminals shall be tin plated. The terminal design
45、 shall allow for at least two wires of relay rating to be connected (see4.1). 4.10.1.3 Plug-in terminals Plug-in terminals shall conform to the arrangement and dimensions necessary for proper mating with the associated socket or connector. For plug-in relays, the mounting arrangement of therelay and
46、 its corresponding socket shall be designed such that the entire weight of the relay shall be suspended and the stability of its mounting shall be provided by an auxiliary mounting means other than the electrical terminals of the socket. Relays with plug-in terminals shall have the electrical and en
47、vironmental tests performed with the specified socket assembled to the unit. Plug-in terminals shall be gold plated. 4.10.1.4 Screw terminals Screw terminals shall be supplied with hardware as specified in the detail specification (see4.1). The diameter of the seat shall be equal to, or greater than
48、, the diameter across the corresponding lug designed for the particular current. It shall not be less than the area necessary to ensure that the current density does not exceed1,5510 6 A/m 2(1000A/in 2 ). NOTE 6The seat area does not include the cross-sectional area of the stud. 4.10.2 Terminal mark
49、ing Terminal identification shall be durably and legibly marked as specified in Table 2 to Table 4. For dual coil relays, the relationship between coil and contacts shall be as specified in Table 5. The positive end of the coil (XI) shall be designated on the header by use of a contrast bead. Table 2 Contact arrangements, symbols andterminal marking Single throw Double throw Single break Form “A” Form “B” Form “C” Form “K” normally open normally closed (two position) three position centre o
