1、BRITISH STANDARD AEROSPACE SERIES BS2G132: 1981 Specification for General requirements for electromagnetically operated contactors for aircraft UDC629.7.064.5:621.316.53BS2G132:1981 This British Standard, having been prepared under the directionof the Aerospace Standards Committee, was published und
2、er the authority ofthe Board of BSI and comes intoeffect on 31December1981 BSI11-1999 The following BSI references relate to the work on this standard: Committee reference ACE/43 Draft for comment80/74178 DC ISBN 0 580 12409 6 Foreword This British Standard has been prepared at the request of the Ae
3、rospace Standards Committee and Society of British Aerospace Companies to cover electromagnetically operated a.c. and d.c. contactors for use in aircraft. It supersedes British Standard G132:1951 which is therefore withdrawn. A British Standard does not purport to include all the necessary provision
4、s of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi and ii, pages1 to18 and a bac
5、k cover. 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. Amendments issued since publication Amd. No. Date of issue CommentsBS2G132:1981 BSI 11-1999 i Contents Page Foreword Inside
6、front cover 1 Scope 1 2 References 1 3 Definitions 1 4 General requirements 2 5 Particular requirements 3 6 Tests 4 7 Type approval tests 5 8 Production acceptance tests 10 9 Quality assurance test 11 10 Serviceability tests 12 Appendix A Driving sand test 15 Appendix B Impact shock test 15 Appendix
7、 C Fluid contamination tests 15 Figure 1 Symbols and identification of terminals: single-pole contactors 17 Figure 2 Symbols and identification of terminals: three pole contactors 17 Figure 3 Typical test circuit for short-circuit test 18 Table 1 Environmental tests: proof conditions 5 Table 2 Stren
8、gth of terminations 6 Table 3 Contact voltage drop 6 Table 4 Altitude, temperature and cycles of operation 7 Table 5 Type tests schedule 13 Table 6 Quality assurance test schedule 14 Table 7 Sand composition 15 Table 8 Pulse acceleration and duration (shock) 15 Table 9 Test fluids 16ii blankBS2G132:
9、1981 BSI 11-1999 1 1 Scope This British Standard specifies the requirements for single and three-pole electromagnetically operated contactors, in the range25A to600A for use in nominal28V d.c. and115/200V three-phase400Hz a.c. systems in aircraft. Two environmental classes and two enclosure categori
10、es are specified as follows. Environmental classes Class1. Contactors suitable for high altitude and wide temperature conditions. Class2. Contactors suitable for lower altitudes and narrower temperature conditions. Enclosure categories Category A. Hermetically sealed contactors. Category B. Non-herm
11、etically sealed contactors. 2 References This standard makes reference to the following standards publications. BS410, Specification for test sieves. BS2011, Basic environmental testing procedures Part2.1Ea: Test Ea. Shock. BS6001, Sampling procedures and tables for inspection by attributes. 2G100,
12、General requirements for electrical equipment and indicating instruments for aircraft Part2: Environmental and operating conditions, paragraph213, Leakage tests for hermetically sealed equipment. 3G100, General requirements for equipment for use in aircraft Part0: Introduction Part1:Identification a
13、nd declarations Part2: All equipment Section1 Construction Section3 Environmental conditions Subsection3.1 Vibration Subsection3.2 Temperature-pressure requirements Subsection3.3 Mould growth Subsection3.5 Explosion-proofness Subsection3.6 Acceleration requirements Subsection3.8 Salt mist Subsection
14、3.12 Fluid contamination Part3: Characteristics of aircraft electrical power supplies Part4: Electrical equipment Section1 Construction and general Subsection1.1 Electrical insulation tests. G 176, Cartridge fuses for aircraft. 3G178, Crimped joints for aircraft electrical cables and wires. G216, Ha
15、nd operated, thermally compensated, miniature single- and triple-pole circuit breakers. 3 Definitions For the purposes of this British Standard the following definitions apply. 3.1 normally open contacts contacts which do not allow the passage of current when the contactor control coil(s) are de-ene
16、rgized and the contactor is not latched ON. These contacts will close to allow the passage of current when the control coil only is energized 3.2 normally closed contacts contacts which allow the passage of current when the contactor control coil(s) are de-energized and the contactor is not latched
17、ON. These contacts will open to prevent the passage of current when the control coil only is energized 3.3 control coil a coil which has to be energized to cause the normally open contacts to change from the open to closed position and/or the normally closed contacts to change from the closed to ope
18、n position 3.4 release coil a coil which, in a latched contactor has to be energized to cause the normally open contacts to change from the closed to the open position and/or the normally closed contacts to change from the open to the closed position 3.5 pull in voltage the minimum voltage, rising,
19、which has to be applied to the control coil to ensure complete closure of the normally open main and auxiliary contacts, in one movement 3.6 drop out voltage a) for magnetically held contactors. The maximum voltage, falling, at which complete closing of the normally closed main and auxiliary contact
20、s occurs in one movement, in the case of a change-over contactor, or complete opening of all main and auxiliary normally-open contacts occurs in one movement, in the case of a one-way contactor. b) for latched contactors. The minimum voltage rising, at which the latch is fully operated, allowing the
21、 contacts to revert to the de-energized position.BS2G132:1981 2 BSI 11-1999 3.7 response time at closure the period of time between application of voltage to the control coil, and the closing of the last of the normally open contacts 3.8 response time on opening the period of time between removal of
22、 voltage to the control coil, or application of voltage to the release coil, and the closing of the last of the normally closed contacts in the case of a changeover contactor, or opening of the last of the normally open contacts in the case of a one way contactor 3.9 current rating the maximum curre
23、nt at each specified load condition which the contact can make, carry continuously and break, at the maximum permitted voltage for the specified number of operations 4 General requirements 4.1 Description and design requirements 4.1.1 The contactors shall comply with the requirements of this British
24、 Standard. 4.1.2 Both categories of contactors, (A) hermetically sealed or (B) non-hermetically sealed, shall be suitable for one of the following temperature and altitude classifications. Class1. Contactors for use at altitudes up to21300m and for temperatures within the range54 C to+85 C shall not
25、 suffer damage nor deterioration when subjected to temperatures within the range54 C to62 C (non-operating). Class2. Contactors for use at altitudes up to13700m at temperatures within the range54 C to+70 C shall not suffer damage nor deterioration when subjected to temperatures within the ranges54 C
26、 to62 C and+70 C to+85 C (non-operating). 4.1.3 The contactors shall be suitable for operation in an explosive environment as defined in4.2 2) of3G100-2-3.5:1972. 4.1.4 The contactors shall operate satisfactorily when mounted in any attitude. 4.1.5 The contactors may be single or three pole type hav
27、ing normally open, normally closed, or normally closed change over main contacts. Auxiliary contacts may be provided. 4.1.6 The method of operation of the contactors shall be by means of a coil suitable for either28V d.c. or115V400Hz a.c. supplies and the mechanism shall be either magnetically held
28、or latched. 4.1.7 The contactor terminals shall be identified as shown in Figure 1 and Figure 2. 4.2 Rating 4.2.1 Voltage 4.2.1.1 All contacts shall be suitable for operating in systems having characteristics in accordance with3G100-3 at nominal28V d.c. or115/200V400Hz a.c. or both as appropriate. I
29、n addition, auxiliary contacts shall be suitable for voltages down to4V d.c. or a.c., and requirements to operate down to100mV may be specified. 4.2.1.2 All operating coils shall be suitable for operating in systems having characteristics in accordance with3G100-3 at nominal28V d.c. or115V400 Hz a.c
30、. and shall be capable of a minimum life of1000 cycles of operation, each cycle consisting of3h at maximum voltage followed by0.5h un-energized, the cycles being divided in the ratio of80% at maximum ambient temperature and20% at minimum ambient temperature. 4.2.2 Current 4.2.2.1 Nominal rating. The
31、 preferred nominal current ratings of the contactor main contacts shall be25A,50A,100A,150A,200A,300A,400A and600A, and the auxiliary shall be5A. The main contacts shall be capable of switching100% of nominal current rating for50000 operations in resistive and inductive load circuits, the inductive
32、characteristics of which shall be: d.c. loads, time constant0.03 0.005s a.c. loads, power factor0.75 0.05 lagging. The auxiliary contacts shall be capable of switching load currents of100% nominal rated resistive current and60% nominal rated inductive current, the inductive characteristic of which s
33、hall be as for main contacts. In addition, the contacts shall be capable of switching100mA resistive load at4V d.c. and a.c. 4.2.2.2 Overload rating. The main and auxiliary contacts shall be capable of switching resistive loads of200% nominal current rating at least50operations. 4.2.2.3 Short circui
34、t rating. The main and auxiliary contacts shall be capable of closing on to and carrying prospective short circuit currents of6000A d.c. and3000A a.c. as applicable and as defined in7.18.BS2G132:1981 BSI 11-1999 3 The auxiliary contacts shall be compatible with a5A circuit breaker complying with the
35、 requirements of G216. 4.3 Declarations. In addition to the declarations specified in3G100-1, the manufacturer shall declare: a) the classification; b) the category; c) the motor load or tungsten filament switching capability if required. 4.4 Marking. In addition to the terminal numbering (see Figur
36、e 1 and Figure 2), the following minimum information shall be clearly and indelibly marked on each contactor. a) The number of this British Standard 1) , i.e.BS2G132, the environmental classification and the enclosure category. b) The manufacturers name or identification. c) The manufacturers type n
37、umber. d) Resistive current rating. e) Voltage rating (d.c. and a.c.). f) Coil voltage. g) Circuit diagram including auxiliary contacts, (see Figure 1 and Figure 2). h) Manufacturers serial number. 5 Particular requirements 5.1 Operation 5.1.1 The contactors shall be of the single pole or three pole
38、 type (main contacts) with or without auxiliary contacts. They shall be electromagnetically operated and may be electromagnetically held, mechanically latched, or magnetically latched. 5.1.2 The auxiliary contacts of the contactor shall be mechanically connected to the main contacts such that only w
39、hen all main contacts are in a specific position shall all auxiliary contacts be in their correspondingly correct position. 5.1.3 At the declared minimum pull-in voltage complete closing or opening of all contacts including contact over travel or wipe, shall result. 5.1.4 On a steadily falling volta
40、ge, the maximum voltage which allows the mechanism to move shall ensure the complete closing or opening of all contacts, including over travel or wipe. 5.2 Construction 5.2.1 The main terminals shall be studs of the following sizes. The terminals shall be capable of accepting crimped type copper ter
41、minations. The terminal seat shall have a diameter not less than that of the copper lug width. A flat washer having a diameter not less than that of the termination and a nut with approved means of locking shall be fitted to each terminal. 5.2.2 The auxiliary contacts and control coil(s) shall be el
42、ectrically connected by means of a connector or screw terminals. Screw terminals shall each have a flat washer and locking washer. 5.2.3 Suitable barriers shall be disposed between all studs and terminals and shall be of sufficient height to prevent short circuiting of any two connections by a flat
43、conductor. Terminal covers shall be provided. 5.2.4 For category A contactors, the enclosure shall contain dry air or inert gas having a dew point lower than65 C, and the leakage rate from this enclosure shall not exceed1 10 5 ml/h for each litre volume of the enclosure. 5.2.5 The category A contact
44、or shall be designed in such a way that defective hermetic sealing will not result in catastrophic failure. 5.2.6 The contactors shall be so constructed that all contacts are suitable for performing at least50000cycles of operation at maximum rated current and voltage. Where specified, new and unuse
45、d auxiliary contacts shall be suitable for performing at least50000cycles of operation at5mA100mV in a resistive load circuit. 5.2.7 All non-metallic parts shall be manufactured from material of low flammability as specified in3G100-2-1. 5.2.8 The casing shall not be connected electrically to the co
46、il, nor to the contacts, and shall be capable of being earthed, if this is required, by the mounting. 1) Marking BS2G132 on or in relation to a product is a claim by the manufacturer that the product has been manufactured in accordance with the requirements of the standard. The accuracy of such a cl
47、aim is therefore solely the manufacturers responsibility. Enquiries as to the availability of third party certification to support such claims should be addressed to the Director, British Standards Institution, Maylands Avenue, Hemel Hempstead, Herts HP24SQ in the case of certification marks adminis
48、tered by BSI or to the appropriate authority for other certification marks. Current rating (A) Stud size (mm) Cable size (AWG) 25 4 14 50 4 10 100 6 6 150 6 4 200 8 0 300 8 0000 400 10 2 0 600 10 2 0000BS2G132:1981 4 BSI 11-1999 5.3 Environmental requirements. Contactors shall be designed to operate
49、 in all naturally encountered combinations of conditions listed in Table 1. 6 Tests 6.1 Nature and order of tests. Tests shall be carried out to prove compliance with the relevant requirements of this standard. It is not intended, nor recommended, that all these tests be made on every contactor supplied. The tests are therefore resolved into four groups as follows. a) Type approval tests (clause7). This group of tests shall be made on a certain quantity of contactors to demonstrate that they com
