1、BRITISH STANDARD AEROSPACE SERIES BSG217:1975 Specification for General requirements for cockpit lighting controllers UDC 629.73.043.048.8:621.316.544.1BSG217:1975 This BritishStandard, having been approved by the AerospaceIndustry StandardsCommittee, waspublished under the authorityof the Executive
2、 Board on 31January1975 BSI 01-2000 The following BSI references relate to the work on this standard: Committee referenceACE/45 Draft for comment73/35031 ISBN 0 580 08820 0 Foreword This BritishStandard has been prepared at the request of the Aerospace Industry. It specifies general requirements for
3、 lighting controllers which supply electric filament lamps used in aircraft instruments and for the illumination of panels. The standard assumes the use of solid state components; controllers using other types of components are not, however, excluded provided they comply with the requirements of thi
4、s standard. It is intended that this standard be read in conjunction with the relevant equipment specification. NOTEInformation regarding metric (SI) units is given in BS3763 “The International System of units (SI)”, BS350 “Conversion factors and tables” and PD5686 “The use of SI units”. A British S
5、tandard does not purport to include all the necessary provisions 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 cov
6、er, an inside front cover, pagesi andii, pages1 to6, an inside back cover and a back 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.
7、No. Date CommentsBSG217:1975 BSI 01-2000 i Contents Page Foreword Inside front cover Section 1. General 1 Scope 1 2 References 1 3 Definitions 1 4 General construction 1 5 Nominal supply voltages 1 6 Preferred output ratings 1 7 Input supply characteristics 2 8 Output characteristics 2 9 Efficiency
8、2 10 Operation 2 11 Protection 2 12 Environmental conditions 2 Section 2. Particular requirements 13 Arrangement and construction 2 14 Components 2 15 Electromagnetic interference 3 16 Magnetic influence 3 17 Temperature limitation 3 18 Bonding 3 19 Markings 3 Section 3. Tests 20 General 3 21 Test c
9、onditions 3 22 Performance type tests 4 23 Environmental tests 4 24 Production acceptance tests 5 25 Production quality tests 5 Appendix A Dust and sand test Inside back cover Figure 1 Measuring device for dust and sand test Inside back cover Table 1 Preferred voltages 1 Table 2 Preferred output rat
10、ings 1ii blankBSG217:1975 BSI 01-2000 1 Section 1. General 1 Scope This BritishStandard specifies general design characteristics for lighting controllers to supply electric filament lamps used in aircraft instruments and for the illumination of panels, operating from nominal28V d.c. and115V a.c.400H
11、z aircraft supplies. 2 References This standard makes reference to the following BritishStandards: BS4727, Glossary of electrotechnical, power, telecommunications, electronics, lighting and colour terms. BS3G100, General requirements for equipment in aircraft. BS3G100-1, Identification and declarati
12、ons. BS3G100-2, All equipment. BS3G100:Section 1, Construction. BS3G100:Section 2, Magnetic influence. BS3G100:Section 3, Environmental conditions. BS3G100:Subsection 3.1, Vibration requirements. BS3G100:Subsection 3.2, Temperature-pressure requirements. BS3G100:Subsection 3.7, Tropical exposure. BS
13、3G100:Subsection 3.8, Salt mist. BS3G100-3, Characteristics of aircraft electrical systems. BS3G100-4, Electrical equipment. BS3G100:Section 1, Construction and general. BS3G100:Subsection 1.1, Electrical insulation tests. BS3G100:Section 2, Electromagnetic interference at radio and audio frequencie
14、s. 3 Definitions For the purposes of this BritishStandard the definitions in BS4727 and the following apply: lighting controller a unit from which the output voltage can be continuously varied to supply a group of lamps to control their luminous flux. Such a unit may incorporate a device to convert
15、the input voltage to a lower output voltage 4 General construction 4.1 Design. The design and construction of dimming devices shall comply additionally with the relevant requirements of BS3G100-1, BS3G100-2.1 and BS3G100-4.1, particularly in relation to life and strength of the manual control mechan
16、ism, and with the relevant equipment specification. 4.2 Suitability for operation at altitude. The design and construction of the lighting controller shall be such that it is suitable for operation at the altitude appropriate to the class of aircraft and grade of equipment defined in BS3G100-2.3.2.
17、The class and grade shall be specified in the relevant equipment specification. 4.3 Methods of mounting and control. The lighting controller may be designed and constructed for direct mounting on a panel and/or remote rack. When the device is suitable for panel mounting it shall incorporate an integ
18、ral control. When designed for remote mounting there shall be a panel mounted control. 5 Nominal supply voltages Unless otherwise required by the relevant equipment specification the lighting controller shall be designed to operate on one of the supply voltages given inTable 1. Table 1 Preferred vol
19、tages 6 Preferred output ratings Table 2 lists the preferred continuous output ratings for the lighting controllers. The stated output shall be available over the complete environmental temperature and pressure conditions required by12.1. Table 2 Preferred output ratings Input supply (see clause7) L
20、amp voltage 28Vd.c. 28Vd.c. 115Va.c., 400Hz, single phase 115Va.c., 400Hz, single phase 5V 28V 5V 28V W (or V A) Nominal current A for5V lamps for28V lamps 25 50 100 250 400 5 10 20 50 80 2 4 9 14BSG217:1975 2 BSI 01-2000 7 Input supply characteristics 7.1 Unless otherwise required by the relevant e
21、quipment specification the lighting controller shall be capable of operating from the normal aircraft input electrical supply having the characteristics for Category B equipment specified in BS3G100-3. 7.2 The lighting controller shall be capable of withstanding and operating under the conditions of
22、 transient and overvoltage input indicated by the appropriate curves in BS3G100-3. 7.3 The relevant equipment specification shall state the appropriate input supply characteristics when the supply is non-preferred. 8 Output characteristics 8.1 Control of output. The lighting controller shall provide
23、 variable output such that the light output of the lamps shall change linearly (as judged visually) from zero to full over the full movement of the control. NOTEThis requirement is to ensure that the control of light output is not concentrated in one small section of the control. 8.2 Voltage. The tr
24、ue r.m.s output voltage of the lighting controller, when supplied at the relevant nominal input voltage stated inTable 1 and supplying the rated load, shall be variable over the ranges1V to26V or1V to5V, as stated in the relevant equipment specification. 8.3 Peak voltage. The repetitive peak output
25、voltage shall not exceed200% of the nominal lamp voltage. 8.4 Pulse repetition rate. The pulse repetition rate shall be greater than100 per second. 8.5 Voltage regulation. When the load is reduced from100% to10% of the rated value the output voltage shall not change from the controlled value by more
26、 than10% of the nominal lamp voltage with the controller set to any setting. With zero load the lighting controller output shall not exceed110% of the voltage stated in8.2. 9 Efficiency The power loss in the lighting controller shall be as stated in the relevant equipment specification, and shall in
27、 any case not exceed30% of the full rated output power. 10 Operation 10.1 Inrush current. The lighting controller shall not be damaged when initially powered into a representative full lamp load at all control settings. 10.2 Manual controls. The relevant equipment specification shall specify the typ
28、e of manual control and state whether it is to be remote from, or integral with, the lighting controller. 11 Protection 11.1 Excess output voltage. No single fault shall cause the output voltage to rise more than10% above the maximum output voltage specified in8.2. 11.2 Reversed input polarity. The
29、lighting controller shall not be damaged by the inadvertant reversal of the polarity of28V d.c. supply input connections. 11.3 Short circuit capacity. A short circuit on the output, or overload, shall not cause damage to the lighting controller, or excessive heating. 11.4 Open circuit protection. Th
30、e lighting controller shall not be damaged by the removal of the output load. 11.5 Low input voltage. Lighting controllers having28V d.c. inputs shall not be damaged if subjected to inputs down to12V. 12 Environmental conditions 12.1 The lighting controller shall be capable of operation under the te
31、mperature and pressure conditions for the appropriate grade of equipment stated in BS3G100-2.3.2, and specified in the relevant equipment specification. 12.2 The lighting controller shall be capable of operation under the appropriate vibration conditions stated in BS3G100-2.3.1, and specified in the
32、 relevant equipment specification. 12.3 The lighting controller shall be so constructed as to meet the appropriate environmental tests specified in this BritishStandard and the relevant equipment specification. Section 2. Particular requirements 13 Arrangement and construction 13.1 The lighting cont
33、roller shall be capable of operation in any mounting attitude. 13.2 The requirements specified in BS3G100-2.1 shall be observed, particularly those relating to the selection of construction materials having low flammability properties and producing no harmful concentration of toxic products or noxio
34、us emanations. 14 Components All components shall conform to an approved specification 1)and should preferably be selected from approved standard ranges.BSG217:1975 BSI 01-2000 3 15 Electromagnetic interference The lighting controller shall be designed to meet the requirements in BS3G100-4.2 for ele
35、ctromagnetic interference. 16 Magnetic influence The compass safe distance of the lighting controller shall be as small as practicable consistent with the requirements of BS3G100-2.2. 17 Temperature limitation External surfaces of the lighting controller and/or its remote controller shall not exceed
36、40 C above ambient temperature under normal, overload or short circuit conditions. Unless otherwise stated in the equipment specification the lighting controller shall require no external cooling facilities. It shall also be capable of continuous operation at full rated load under the most adverse c
37、ombination of ambient temperature and pressure required in12.1. It is permissible for the aircraft structure to assist in the dissipation of heat. 18 Bonding Provision shall be made for the chassis of the unit electronics to be bonded directly to the airframe via the unit mounting points, or alterna
38、tively as required by the relevant equipment specifications. 19 Markings The information required by BS3G100-1 shall be indelibly marked on the lighting controller. Section 3. Tests 20 General Tests shall be made to prove compliance with all requirements of this BritishStandard. It is not intended o
39、r recommended that complete tests shall be made on every lighting controller supplied. Three kinds of tests, therefore, are specified as follows. a) Type tests (clauses22 and23), which shall be made on each particular type of lighting controller. b) Production acceptance tests (clause24), which shal
40、l be made on every lighting controller manufactured to this BritishStandard. c) Production quality tests (clause25), which shall be made on samples selected as specified. 20.1 Lighting controllers subjected to type tests shall have passed the production acceptance tests, and the results shall be rec
41、orded. The number of samples to be used for the type tests and the order of tests on a particular sample shall be stated in the individual specification. 20.2 For inspection purposes the Inspecting Authority shall be provided with complete manufacturing drawings of the lighting controller before sam
42、ples are submitted for approval. The manufacturer shall disclose to the Approving Authority any proposal to introduce changes affecting interchangeability and shall obtain the Approving Authoritys written approval before applying the change to production. As soon as series production commences a com
43、plete set of drawings shall be sent to the Approving Authority. 21 Test conditions 21.1 Atmospheric conditions. Unless otherwise stated, all tests shall be conducted at the standard atmospheric conditions for testing stated in BS3G100-2.3.0. 21.2 Supply characteristics. During the tests the lighting
44、 controller shall be energized from a supply 2)representative of the characteristics given in BS3G100-3 for Category B equipment. 21.3 Input voltage. All d.c. voltages are mean values and shall be measured to an accuracy of 0.5%. All a.c. voltages are r.m.s. values and shall be measured to an accura
45、cy of 0.5% 21.4 Output. Since the output of a lighting controller would normally be of non-sinusoidal wave form and probably of a pulse nature all test equipment shall be capable of measuring true r.m.s. output voltage to an accuracy of 2.5%. 21.5 Peak output voltage. Where reference is made to a ma
46、ximum output voltage this shall be measured with a peak reading instrument with an accuracy of 5%. 21.6 Point of measurement. Unless otherwise stated all electrical test measurements are referred to the input and output terminations of the lighting controller. 21.7 Output load. A representative lamp
47、 load shall be applied to the output during the tests. 1) For equipment in British civil and military aircraft the Approving Authorities are the Civil Aviation Authority, Airworthiness Division or the Procurement Executive, Ministry of Defence respectively (or through a Design Authority approved by
48、them). 2) A draft BritishStandard “General requirements for ground support electrical supplies for aircraft” is currently in course of preparation.BSG217:1975 4 BSI 01-2000 22 Performance type tests 22.1 Output voltage characteristics. When the maximum normal steady state (NSSL) 3)voltage required i
49、n7.1 is applied to the input of the lighting controller the output characteristics over the complete control range shall be measured when connected to the rated load. This test shall be repeated and measurements made when connected to33% and66% of rated load. The input to the lighting controller shall be reduced to the minimum NSSL voltage and the foregoing three tests and measurements repeated. Under all the above conditions of input supply and load the output supply and output voltage shall conform to the requirements specified in clause8. 22.2 Efficiency. The m
