1、BRITISH STANDARD AEROSPACE SERIES BSG209:1970 Specification for Transformer rectifier units UDC 629.7.064.5:621.314.6BSG209:1970 This BritishStandard, having been approved by the AerospaceIndustry Standards Committee, was published undertheauthorityof theExecutiveBoardof theInstitutionon 31March1970
2、 BSI 01-2000 The following BSI references relate to the work on this standard: Committee referenceACE/45 Draft for comment67/28645 ISBN 0 580 05738 0 Foreword This BritishStandard is intended to be used in conjunction with individual specifications for particular designs of rectification equipment.
3、Reference is made in this standard to the following BritishStandards: BS2G100, General requirements for electrical equipment and indicating instruments for aircraft. Part1: Identification, declarations and construction; Part2: Environmental and operating conditions; Part2: Section2. Radio interferen
4、ce; Part3: Characteristics of aircraft electrical systems. BS3G100, General requirements for equipment in aircraft. Part2: All equipment. Section3. Environmental conditions. Subsection3.1. Vibration. BSG178, Crimped joints for aircraft electrical cables and wires. BSSP20, Panel type air filter eleme
5、nts for use with internal combustion engines and compressors on aircraft. BS205, Glossary of terms used in electrical engineering. BS410, Test sieves. BS3489, Sound level meters (industrial grade). Reference should also be made to: BS2135, Capacitors for radio interference suppression. BS3494, Recom
6、mendations on semiconductor devices. BS3934, Dimensions of semiconductor devices. BS9300, Semiconductor devices of assessed quality: General data and method of test. NOTEThe values in metric units are to be regarded as the standard. The conversions to imperial units are approximate. Accurate convers
7、ions should be based on the tables in BS350, “Conversion factors and tables”. Information concerning SI units is given in PD5686 “The use of SI units”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their corr
8、ect 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 andii, pages1 to9 and a back cover. This standard has been updated (see copyright date) and may have ha
9、d amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSG209:1970 BSI 01-2000 i Contents Page Foreword Inside front cover 1 General 1 1.1 Scope 1 1.2 Definitions 1 1.3 General construction 1 1.4 A
10、rrangement and construction 1 1.4.1 Mounting attitude 1 1.4.2 Mounting arrangement 1 1.4.3 Interchangeability 1 1.4.4 Endurance 1 1.4.5 Internal electrical connections 1 1.4.6 Maximum operating temperature 1 1.4.7 Overheating 1 1.4.8 Current measurement 1 1.5 Terminals 1 1.6 Components 2 1.7 Rating
11、2 1.8 Supply characteristics 2 1.9 Efficiency 2 1.10 Regulation 2 1.11 Surges 2 1.12 Ripple content 2 1.13 Overload conditions 3 1.14 Environmental conditions 3 1.15 Acoustic noise 3 1.16 Radio interference 3 1.17 Compass interference 3 1.18 Cooling 3 1.19 Declarations 3 1.20 Marking 4 1.21 Warning
12、notices 4 2 Tests 2.1 General 4 2.2 Test conditions 4 Type tests 2.3 Performance type tests 4 2.3.1 Voltage regulation 4 2.3.2 Transient tests 4 2.3.3 Efficiency and power factor 5 2.3.4 Input current 5 2.3.5 Input current waveform 5 2.3.6 Ripple and output voltage waveform 5 2.3.7 Protection circui
13、ts 5 2.3.8 Output current rating 5 2.3.9 Overload capacity 5 2.3.10 Hot and cold voltage regulation 5 2.3.11 Insulation resistance 5 2.3.12 Inrush current 5BSG209:1970 ii BSI 01-2000 Page 2.4 Environmental type tests 6 2.4.1 Climatic 6 2.4.2 Leakage of hermetically sealed equipment 6 2.4.3 Vibration
14、 6 2.4.4 Acceleration 6 2.4.5 Crash acceleration 6 2.4.6 Radio interference 6 2.4.7 Compass safe distance 6 2.4.8 Salt corrosion 6 2.4.9 Dust and sand 6 2.4.10 Contamination 6 2.4.11 Acoustic noise 7 2.4.12 Imported and exported voltage transients 7 Production tests 2.5 Production acceptance tests 7
15、 2.5.1 Voltage regulation 7 2.5.2 Input current 7 2.5.3 Ripple 7 2.5.4 Protection circuits 7 2.5.5 Insulation resistance 7 Quality tests 2.6 Production quality tests 7 2.6.1 Sampling 7 2.6.2 Climatic(10-day test) 7 2.6.3 Vibration 7 2.6.4 Performance at maximum temperature 7 2.6.5 Further tests 7 Ap
16、pendix A Salt corrosion test 8 Appendix B Dust and sand test 8 Figure 1 Measuring device for dust and sand test 9BSG209:1970 BSI 01-2000 1 1 General 1.1 Scope This BritishStandard deals with the general design and test requirements of transformer rectifier units for use in aircraft. 1.2 Definitions
17、For the purposes of this BritishStandard the definitions in BS205 and the following apply: transformer rectifier unit a device for converting aircraft main and auxiliary a.c. power supplies to d.c. It includes rectifiers, transformers and associated control and protection equipment 1.3 General const
18、ruction 1.3.1 The design and construction of the unit shall comply with the relevant requirements of BS2G100-1 and of the individual specification. 1.3.2 Unless otherwise required by the individual specification, the design and construction of the unit shall be such that it is suitable for operation
19、 at altitudes up to13700m(45000ft), and over an ambient temperature range of55 C to+70 C. 1.4 Arrangement and construction 1.4.1 Mounting attitude. There should preferably be no limitation in the performance of the unit in respect of the attitude in which it may be mounted. Any such limitation shall
20、 be declared. 1.4.2 Mounting arrangement. The mounting arrangements for the unit shall be such that, under the specified conditions of vibration, acceleration and temperature variation, its satisfactory operation is not affected. 1.4.3 Interchangeability. Units bearing the same type number shall be
21、completely interchangeable with respect to installation and performance. 1.4.4 Endurance. The design and construction of the unit should be such that it is suitable for1000hours operation at maximum operating temperature, and for a life of30000 hours at25 C for static parts and3000 hours for rotatin
22、g parts. 1.4.5 Internal electrical connections. Units shall be designed to operate from a fully insulated system, i.e.all electrical circuits shall be insulated from the frame. In primary three-phase star connected arrangements the neutral point shall be brought out to an insulated terminal, unless
23、otherwise required by the individual specification. Provision shall be made for bonding the case of the unit to the aircraft structure. 1.4.6 Maximum operating temperature. The maximum temperature of the external surface of the unit, whilst in operation at the specified conditions, shall be declared
24、. 1.4.7 Overheating. The unit shall embody an overheat sensing device. 1.4.8 Current measurement. Provision should preferably be made for the incorporation of an ammeter shunt for the current measurement. 1.5 Terminals 1.5.1 Screwed terminals, having Unified threads unless otherwise agreed by the De
25、sign Authority, shall be provided for external connections. They shall accommodate an approved 1)type of cable terminal end, crimped in accordance with the requirements of BSG178 and of adequate rating for the current to be carried, and shall be designed in accordance with the requirements of BS2G10
26、0-1. The main d.c. output terminals should preferably be of different sizes. 1.5.2 The terminals shall be clearly and indelibly marked to identify the associated windings. The input terminals shall be identified by the letters A, B, C, and the output terminals shall be suitably identified. 1) For eq
27、uipment for British civil and military aircraft, the Approving Authorities are the Air Registration Board and the Ministry of Technology respectively (through a design authority approved by them).BSG209:1970 2 BSI 01-2000 1.6 Components All components shall conform to an approved specification 2)and
28、 should preferably be selected from approved standard ranges. 1.7 Rating 1.7.1 Constant frequency units shall be rated at nominal input voltage and frequency to provide a nominal28V d.c. supply. 1.7.2 The rating of variable frequency units shall be declared at a frequency of320Hz. 1.7.3 The preferre
29、d nominal ratings for units at sea level and at a temperature of+70 C are as follows: Amperes 50 100 150 250 1.8 Supply characteristics 1.8.1 Units shall be designed to operate from the constant frequency or variable frequency a.c. power supply specified in BS2G100-3. The particular supply character
30、istics applicable shall be stated in the individual specification. 1.8.2 It cannot be assumed that the maximum frequency will necessarily occur at the maximum voltage, or that the minimum frequency will occur at the minimum voltage. 1.8.3 The units shall be capable of withstanding an overvoltage inp
31、ut and of operating under the conditions of transient voltage indicated by the appropriate curves of Figure4 of BS2G100-3. 1.8.4 Under the conditions of1.8.3 the maximum voltage produced on the d.c. side shall not exceed themaximum limit specified inFigure5 of BS2G100-3, and the decay shall be withi
32、n the limits specified in that standard with10% full load connected. 1.8.5 To assist in determining the effect upon the supply voltage, the significant harmonic magnitudes of the input current waveform, measured with the unit on full load, shall be declared. 1.9 Efficiency Unless otherwise stated in
33、 the individual specification, every unit shall have an efficiency at full load of at least85% calculated on the basis of: 1.10 Regulation With nominal input voltage, and under all conditions of frequency, temperature and loads from10% to100% full load, the output voltage shall not vary by more than
34、2.5V. 1.11 Surges If the nominal rating of the unit is less than the preferred minimum of50 A, and if the inrush current characteristics of the unit are such that a fuse of rating2 A or less is ruptured, the maximum peak value of inrush current of the unit shall be declared with its I 2 t value. 1.1
35、2 Ripple content At loads between10% and100% full load the ripple voltage shall be within the limits specified in BS2G100-3. 2) For equipment for British civil and military aircraft, the Approving Authorities are the Air Registration Board and the Ministry of Technology respectively (through a desig
36、n authority approved by them). mean d.c. voltagemean d.c. current (amperes) power input (watts) -100 % BSG209:1970 BSI 01-2000 3 1.13 Overload conditions 1.13.1 The unit shall be capable of delivering without damage150% rated current for two minutes at the minimum output voltage specified in the ind
37、ividual specification, with the minimum specified input voltage. 1.13.2 With the minimum specified input voltage the unit shall be capable of delivering not less than300% rated current for five seconds without damage. 1.14 Environmental conditions 1.14.1 Unless otherwise specified, the unit shall co
38、mply with the requirements of BS2G100-2 in respect of: The unit shall also comply with the vibration requirements of BS3G100-2.3.3, and as detailed in the individual specification 1.14.2 If required by the individual specification, the unit shall also comply with the requirements of2.4.8, 2.4.9 and2
39、.4.10 of this BritishStandard in respect of resistance to salt corrosion, dust and sand, and contaminating fluids. 1.15 Acoustic noise The noise emitted by the unit, when measured in accordance with2.4.11, shall not exceed75dB. 1.16 Radio interference The unit shall be designed to minimize the gener
40、ation of radio interference. The radio-noise voltages at all input and output terminals shall be limited to the levels specified in BS2G100-2.2 when measured as described therein. 1.17 Compass interference The unit shall be designed so that the external magnetic fields produced are as small as pract
41、icable. Measurements of compass safe distance shall be made in accordance with BS2G100-2 and shall be declared by the manufacturer. 1.18 Cooling 1.18.1 The unit shall have adequate cooling facilities so that continuous operation at full load is possible at ground level conditions at the maximum ambi
42、ent operating temperature. 1.18.2 The manufacturer shall supply curves indicating the output at various temperatures when the unit is operating at3050m, 6100m, 10700m and13700m(10000ft, 20000ft, 35000ft and45000ft), or as otherwise specified. 1.18.3 For blast-cooled units curves shall be supplied sh
43、owing the mass flow and pressure head of cooling air required for various inlet air temperatures at sea level,9150m(30000ft) and13700m(45000ft) and with the unit supplying full load at nominal input voltage. 1.18.4 Information shall be provided on the installation drawings about the minimum clearanc
44、es required to ensure that the cooling conditions are maintained. 1.19 Declarations In addition to the relevant declarations required by BS2G100, the following information shall be provided by the manufacturer: 1) Single rating, including any derating for parallel operation. 2) Rated input voltage a
45、nd frequency of the supply. 3) Cooling requirement. 4) Maximum temperature of external surface. 5) Minimum and maximum operating ambient temperature. 1) Normal acceleration Grade C, Class2A(i) 2) Crash acceleration Grade G, Class13 3) Climatic proofness Class1 (with a maximum pressure equal to an al
46、titude of13700m(45000ft)BSG209:1970 4 BSI 01-2000 1.20 Marking The following information shall be indelibly marked on the nameplate, and the modification plate shall provide for ten modification references: 1) Manufacturers name. 2) Manufacturers type (or part) number. 3) Serial (or batch) number. 4
47、) Any other information required by the individual specification. 1.21 Warning notices Any warning notice shall be clearly displayed on the unit. 2 Tests 2.1 General Tests shall be made to prove compliance with all requirements of this BritishStandard. It is not intended or recommended that complete
48、 tests shall be made on every unit supplied. Three kinds of tests, therefore, are specified, as follows: 1) Type tests 2.3 and2.4 which shall be made on each particular type of unit. 2) Production tests (2.5) which shall be made on every unit manufactured to this BritishStandard. 3) Quality tests (2
49、.6) which shall be made on samples selected as specified in2.6.1. 2.1.1 Units subjected to type tests shall have passed the production tests, and the results shall be recorded. 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. 2.1.2 The Inspecting Authority shall be provided with complete manufacturing drawings of the
