1、INTERNATIONAL STANDARD IS0 5867-l First edition 1996-02-01 Aircraft - Electromagnetic relays and contactors - Part 1: General requirements ABronefs - Relais et contacteurs &ectromagn&iques - Partie I. Exigences g&Wales - - = ggigc 1 b&gp/.& Reference number IS0 5867-l ,I 996(E) IS0 5867-1:1996(E) Co
2、ntents Page 1 Scope 1 2 Normative references . 1 3 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4 General requirements . . . . . . . . . . . . . . . . . . . .
3、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4.1 Detail specification sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4.2 Temperature class . . . . . . . . . . . . . . . . . . . . . . . .
4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4.3 Sealing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4.4 Altitudes . . . . . . . . . .
5、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4.5 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6、 . . . . . . . 2 4.6 Design requirements 2 4.7 Sealing enclosures 2 4.8 Installation clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 4.9 Grounding . 3 4.10 Terminals . . . . . . . . . . . . . . . . . . . . . . . . .
7、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 4.11 Contact symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4.12 Materials . . . . . . . . . . .
8、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4.13 Qualification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9、. . . 7 5 Performance detail requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5.1 Examination of product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5.2 Environmental ele
10、ctrical and mechanical requirements . . . . . . . 11 6 Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.1 Examination of product . . . . . . . . . . . . . . . . . .
11、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.2 Test methods for electrical and mechanical requirements . 19 7 Qualification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12、 . . . . . . . 41 7.1 Production acceptance tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 0 IS0 1996 All rights reserved Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, elect
13、ronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher International Organization for Standardization Case Postale 56 l CH-1211 Geneve 20 l Switzerland Printed in Switzerland ii 0 IS0 IS0 5867-1:1996(E) 7.2 Qualification inspection 41 7.3 Retentio
14、n of qualification . . 42 Annexes A Example of an individual specification sheet . . . . . . . . . . . . . . . . . . . 45 B Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Ill Fore
15、word IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a techn
16、ical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
17、electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 5867-l was p
18、repared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 1, Aerospace electrical requirements. IS0 5867 consists of the following parts, under the general title Aircraft - Electromagnetic relays and contactors: - Part I: General requirements Annexes A and B of this part
19、 of IS0 5867 are for information only. INTERNATIONAL STANDARD 0 IS0 IS0 5867-1:1996(E) Aircraft - Electromagnetic relays and contactors - Part 1: General requirements 1 Scope This part of IS0 5867 specifies the performance re- quirements for electromagnetic relays and contactors for use in nominal 2
20、8 V d.c. or 115 V/200 V 3-phase, 400 Hz, a.c. systems having the characteristics specified in IS0 1540. This part of IS0 5867 specifies the performance re- quirements for relays and contactors having nominal contact ratings of 5 A a.c., 5 A d c. or greater. Auxili- ary contacts, where applicable, ma
21、y be rated at lower currents. Three temperature classes and three classes of sealing are specified. This part of IS0 5867 is applicable to single-pole and multi-pole relays and contactors, electromagnetically operated and magnetically held, or electromag- netically operated and mechanically or magne
22、tically latched, controlled by a voltage of 28 V d.c. or 115 V, 400 Hz. a.c. IS0 1540: 1984, Aerospace - Characteristics of air- craft electrical systems. IS0 7137:1995, Aircraft - Environmental conditions and test procedures for airborne equipment. IEC 50 (446): 1990, international Electrotechnical
23、 Vo- cabulary - Chapter 446. Electrical relays. I EC 68-2-l 7: 1994, Basic environmental testing pro- cedures - Part 2. Tests - Test Q. Sealing IEC 158-2:1982, Low-voltage controlgear - Part 2 Semiconductor contacters (solid state contactorsj 3 Definitions For the purposes of this part of IS0 5867,
24、the defi- nitions given in IEC 50 (446) and IEC 158-2 apply 4 General requirements 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 5867. At the time of publication, the editions indicated were valid. A
25、ll standards are subject to revision, and parties to agreements based on this part of IS0 5867 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. 4.
26、1 Detail specification sheets The individual item requirements shall be as specified in this part of IS0 5867 and in accordance with the detail specification sheets related to this part of IS0 5867. In the event of any conflict between re- quirements of this part of IS0 5867 and the detail specifica
27、tion sheets, the latter shall govern. The manufacturer shall prepare an individual specifi- cation sheet for each type of device produced. The 1 IS0 5867-1:1996(E) 0 IS0 individual specification sheet shall define the values for parameters given in annex A. 4.2 Temperature class The temperature clas
28、ses which define the maximum and minimum temperatures for use shall be as fol- lows: 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: Class 1: Hermetically sealed Class 2: Environmentally sealed Class 3:
29、 Ventilated enclosed 4.4 Altitudes Class 1 and 2 sealed relays and contactors shall be suitable for use up to an altitude of 25 000 m. Class 3 contactors shall be suitable for use up to an altitude of 15 000 m. 4.5 Dimensions Relay and contactor dimensions shall be as defined in the detail specifica
30、tion sheet (see 4.1). 4.6 Design requirements The relays and contactors shall operate satisfactorily when mounted in any attitude. The size 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
31、-pole (main contacts) type, with or without auxiliary contacts. The auxiliary contacts shall be mechanically linked to the main contacts and shall indicate the position of the main contacts. Suitable barriers shall be placed between the ter- minals of the contactors in order to prevent an acci- dent
32、al short-circuit. These barriers shall be sufficient to prevent the short-circuiting 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, a 28 V d.c. or 115 V a.c., 400 Hz system having the characteristics sp
33、ecified in IS0 1540. The contacts of relays or contactors shall be capable of switching 28 V d.c. and/or 115 V/200 V a.c., 400 Hz having a system characteristic specified in IS0 1540. 4.7 Sealing enclosures Sealing enclosures shall be of sufficient mechanical strength to withstand the normal abuse i
34、ncurred in handling, transit, storage and installation without causing malfunction or distortion of parts. The case shall not be a part of the contact or coil electrical cir- cuits. NOTE 1 The case may be a part of the magnetic circuit 4.7.1 Hermetically sealed enclosures Hermetically sealed enclosu
35、res shall be constructed as a gastight enclosure that has been completely sealed by fusion of glass or 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
36、 point of at least 5 “C below the lowest temperature rating of the device. NOTE 2 Contactors may be filled with air or with inert gas 4.7.2 Environmentally sealed enclosures Environmentally sealed enclosures shall be con- structed by any means other than that defined in 4.7.1 to achieve the degree o
37、f seal specified in the detail specification (see 4.1). Environmentally 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 least 5 “C below the lowest temperature rating of the device. NOTE 3 Contactors
38、 may be filled with air or with inert gas 4.7.3 Ventilated enclosures Ventilated contactors shall be totally enclosed for mechanical 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 withou
39、t adjustment. The en- closure design shall be such that pressure differentials cannot exist between the inside and outside to ag- gravate the moisture accumulation problem The cover shall be rugged in design, constructed of high 2 0 IS0 IS0 5867-1:1996(E) impact materials, and securely mounted to th
40、e contactor. 4.8 Installation clearances Adequate clearance shall be provided for installation of terminals and mounting hardware. Clearance for standard socket wrenches shall be provided. Special installation tools shall be avoided where possible. 4.9 rounding The mounting shall provide an effectiv
41、e electrical contact to ground when the relay or contactor is mounted. 4.10 Terminals Metal covers shall be provided with a means for grounding. Relays and contactors shall have electrical terminals as specified in the detail specification (see 4 1). No rotation or other loosening of a terminal shal
42、l occur throughout the relay or contactor life. 4.10.1 Terminal type Power terminals of greater than 25 A rating shall be of the threaded stud type. Terminals rated at 25 A or less may be plug-in, solder hook, stud or screw ter- minals. 4.10.1.1 Threaded terminals and mounting studs Stud terminals s
43、hall accept connections using crimped type lugs made of copper or aluminium, or copper bars. A flat washer having a diameter at least equal to that of the base of the terminal, and a self- locking nut or standard nut with suitable locking washer shall be used on each terminal. No rotation or other l
44、oosening 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 disconnection, throughout the life of the relay or contactor. These are maximum values which shall not be ex- ceeded. NOTE 4 For installation torque
45、 values, see the detail specification (4 I) Table 1 - Strength of threaded terminals (static value of pull and torque) Thread size No 4-40 UNC No 6-32 UNC No. 8-32 UNC No IO-32 UNC No IO-24 UNC l/4-28 UNC 5/l 6-24 UNF 3/8-24 UNF 7/l 6-20 UNF l/2-20 UNF Force Torque N Ibf N m in Ibf 22,2 5 0,497 4,4
46、133 30 I,13 10 156 35 2,26 20 180 40 3,615 32 180 40 3,954 35 222 50 8,474 75 311 70 11,298 100 445 100 16,948 150 445 100 16,948 150 445 100 16,948 150 Each terminal shall have a terminal seat that shall provide the normal current-conducting path. The di- ameter of the seat shall not be less than t
47、he area necessary to ensure that the current density does not exceed I,55 x IO6 A/m2 (1 000 A/in*). NOTE 5 The seat does not include the cross-sectional area of the stud Stud terminals shall be capable of accommodating two lugs with hardware as specified. A minimum of one and a half threads shall re
48、main above the nut with all parts tightened in place. 4.10.1.2 Solder hook or straight terminals Solder terminals shall be tin plated. The terminal de- sign shall allow for at least two wires of relay rating to be connected (see 4.1). 4.10.1.3 Plug-in terminals Plug-in terminals shall conform to the
49、 arrangement and dimensions necessary for proper mating with the associated socket or connector. For plug-in relays, the mounting arrangement of the relay and its corresponding socket shall be designed such that the entire weight of the relay shall be sus- pended and the stability of its mounting shall be pro- vided by an auxiliary mounting means other than the electrical terminals of the socket. Relays with plug-in terminals shall have the electrical and environmental tests performed with the specified socket assembled to the unit. Plug-in terminals shall be gold plated 3 IS0 5867-1:1996(E)
