1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Space engineering - Electrical design and interface requirements for power supplyBS EN 166032020:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16603-20-20 August 2018 ICS 49.140 English version Space engineer
2、ing - Electrical design and interface requirements for power supply Ingnierie spatiale - Exigences de conception et dinterface lectriques pour alimentation bord Raumfahrttechnik - Anforderungen an Schnittstellen fr elektrische Leistung This European Standard was approved by CEN on 10 April 2017. CEN
3、 and CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obta
4、ined on application to the CEN-CENELEC Management Centre or to any CEN and CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN and CENELEC member into its own languag
5、e and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugos
6、lav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. CEN-CENELEC Management Centre: Rue de la Scie
7、nce 23, B-1040 Brussels 2018 CEN/CENELEC All rights of exploitation in any form and by any means reserved worldwide for CEN national Members and for CENELEC Members. Ref. No. EN 16603-20-20:2018 ENational forewordThis British Standard is the UK implementation of EN 166032020:2018.The UK participatio
8、n in its preparation was entrusted to Technical Committee ACE/68, Space systems and operations.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsi
9、ble for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 93131 4ICS 49.140Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Pol
10、icy and Strategy Committee on 31 August 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 166032020:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16603-20-20 August 2018 ICS 49.140 English version Space engineering - Electrical design and interface
11、 requirements for power supply Ingnierie spatiale - Exigences de conception et dinterface lectriques pour alimentation bord Raumfahrttechnik - Anforderungen an Schnittstellen fr elektrische Leistung This European Standard was approved by CEN on 10 April 2017. CEN and CENELEC members are bound to com
12、ply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELE
13、C Management Centre or to any CEN and CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN and CENELEC member into its own language and notified to the CEN-CENELEC Man
14、agement Centre has the same status as the official versions. CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Ge
15、rmany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN/CENE
16、LEC All rights of exploitation in any form and by any means reserved worldwide for CEN national Members and for CENELEC Members. Ref. No. EN 16603-20-20:2018 EBS EN 166032020:2018EN 16603-20-20:2018 (E) 2 Table of contents European Foreword . 5 Introduction 6 1 Scope . 7 2 Normative references . 8 3
17、 Terms, definitions and abbreviated terms 9 3.1 Terms from other standards 9 3.2 Terms specific to the present standard . 9 3.3 Abbreviated terms. 18 3.4 Nomenclature . 18 4 Principles 20 4.1 General . 20 4.2 Standard assumptions 20 5 Requirements 21 5.1 Reference power bus specifications . 21 5.2 F
18、unctional/Source interface requirements . 23 5.2.1 LCL/HLCL class 23 5.2.2 RLCL class . 23 5.2.3 Current limitation section . 23 5.2.4 Trip-off section 24 5.2.5 UVP section 24 5.2.6 Telecommand section features . 25 5.2.7 Conditions at start-up/ switch-off . 25 5.2.8 Telemetry section 26 5.2.9 Statu
19、s section . 28 5.2.10 Repetitive overload . 28 5.2.11 Reverse current tolerance . 28 5.2.12 Parallel connection 29 5.2.13 Switching options 29 5.2.14 LCL Switch dissipative failure 31 BS EN 166032020:2018EN 16603-20-20:2018 (E) 3 5.2.15 Loss of LCL lines 32 5.2.16 Noise immunity . 32 5.2.17 Output i
20、mpedance envelope, when in limitation 32 5.2.18 Noise immunity feature . 33 5.2.19 Output LCL load (Input load characteristic) . 33 5.3 Functional/Load interface requirements 34 5.3.1 Nominal feature . 34 5.3.2 Switch-on 34 5.3.3 LCL switch dissipative failure 35 5.3.4 Load test condition 35 5.3.5 U
21、ser UVP at bus input side . 35 5.4 Performance/Source interface requirements . 36 5.4.1 Overall requirements . 36 5.4.2 Start-up/Switch-off requirements . 37 5.4.3 UVP 38 5.4.4 Switch-on capability 39 5.4.5 Voltage drop 40 5.4.6 Stability . 40 5.4.7 Current Telemetry, accuracy . 41 5.4.8 Current Tel
22、emetry, offset. 41 5.4.9 Retrigger interval . 42 5.4.10 dI/dt limit on retrigger ON edge . 42 5.4.11 dI/dt limit on retrigger OFF edge 42 5.4.12 Status, accuracy . 42 5.5 Performance/Load interface requirements 43 5.5.1 Load reverse current . 43 5.5.2 Load characteristic 43 5.5.3 Source-load charact
23、eristic . 44 5.5.4 Start-up surge input current . 44 5.5.5 Internal load Input current limitation 45 Annex A (informative) Requirements mapping 46 Bibliography . 60 BS EN 166032020:2018EN 16603-20-20:2018 (E) 4 Figures Figure 3-1: LCL overload timing diagram (case 1) 13 Figure 3-2: LCL overload timi
24、ng diagram (case 2) 13 Figure 3-3: Typical start-up current profile of a DC/DC converter attached to a LCL . 14 Figure 3-4: RLCL overload timing diagram . 14 Tables Table 3-1: LCL classes . 15 Table 3-2: RLCL classes 16 Table 3-3: HLCL classes 17 Table 5-1: Reference Power Bus Specifications . 22 BS
25、 EN 166032020:2018EN 16603-20-20:2018 (E) 5 European Foreword This document (EN 16603-20-20:2018) has been prepared by Technical Committee CEN-CENELEC/TC 5 “Space”, the secretariat of which is held by DIN. This standard (EN 16603-20-20:2018) originates from ECSS-E-ST-20-20C. This European Standard s
26、hall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2019, and conflicting national standards shall be withdrawn at the latest by February 2019. Attention is drawn to the possibility that some of the elements of this
27、 document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a standardization request given to CEN by the European Commission and the European Free Trade Association. This document has been deve
28、loped to cover specifically space systems and has therefore precedence over any EN covering the same scope but with a wider domain of applicability (e.g. : aerospace). According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to impl
29、ement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania
30、, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 166032020:2018EN 16603-20-20:2018 (E) 6 Introduction This standard identifies the requirements needed to specify, procure or develop a space power distribution based on Latching Current Limiters, both from
31、 source and load perspective. For a reference architecture description, it is possible to refer to ECSS-E-HB-20-20. ECSS-E-HB-20-20 includes a clarification of the principles of operation of a power distribution based on LCLs, identifies important issues related to LCLs and explains the requirements
32、 of the present standard. Note that the present issue of the standard covers electrical design and interface requirements for power distribution based on Latching Current Limiters only. Future issues of the present standard will cover additional power interfaces. BS EN 166032020:2018EN 16603-20-20:2
33、018 (E) 7 1 Scope The target applications covered by this standard are all missions traditionally provided with power distribution and protection by LCLs/RLCLs (science, earth observation, navigation) with exclusion of applications for which the power distribution and protection is provided by fuses
34、 (e.g. most of the GEO telecom satellites). The present standard applies to power distribution by LCLs/RLCLs for power systems, and in general for satellites, required to be Single Point Failure Free. The present standard document applies exclusively to the main bus power distribution by LCLs/RLCLs
35、to external satellite loads. A particular case of LCLs (Heater LCLs, or HLCLs) is also treated. The HLCLs are the protections elements of the power distribution to the thermal heaters in a spacecraft. Internal power system protections of LCLs/RLCLs are not covered. Paralleling of LCLs to increase po
36、wer supply line reliability is not covered by the present standard, since this choice does not appreciably change the reliability of the overall function (i.e. LCL plus load). In fact, a typical reliability figure of the LCL (limited to the loss of its switch-on capability) is 20 FIT or less. If the
37、 load to be connected to the LCL line has a substantial higher failure rate than this, it is not necessary to duplicate the LCL to supply that load. This standard may be tailored for the specific characteristic and constrains of a space project in conformance with ECSS-S-ST-00. BS EN 166032020:2018E
38、N 16603-20-20:2018 (E) 8 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this ECSS Standard. For dated references, subsequent amendments to, or revision of any of these publications do not apply. However, par
39、ties to agreements based on this ECSS Standard are encouraged to investigate the possibility of applying the more recent editions of the normative documents indicated below. For undated references, the latest edition of the publication referred to applies. EN reference Reference in text Title EN 166
40、01-00-01 ECSS-S-ST-00-01 ECSS system - Glossary of terms EN 16603-20 ECSS-E-ST-20 Space engineering - Electrical and electronic BS EN 166032020:2018EN 16603-20-20:2018 (E) 9 3 Terms, definitions and abbreviated terms 3.1 Terms from other standards a. For the purpose of this Standard, the terms and d
41、efinitions from ECSS-S-ST-00-01 apply, in particular for the following terms: 1. redundancy 2. active redundancy 3. hot redundancy 4. cold redundancy 5. fault 6. fault tolerance 3.2 Terms specific to the present standard 3.2.1 centralised feature that serves a number of elementary functions in a sys
42、tem 3.2.2 current overshoot decay time maximum time constant decay time from current overshoot peak to actual limitation current after an overcurrent event, under the assumption that the decay time is modelled by an exponential law 3.2.3 current overshoot recovery time time needed for the to reduce
43、from its maximum value to 10 % of the excess current, at the application of an overload to the LCL/RLCL/HLCL NOTE 1 See Figure 3-1 and Figure 3-2. NOTE 2 Excess current is intended as overshoot peak minus actual limitation current value. 3.2.4 fault condition internal failure of one of the following
44、 devices: LCL, RLCL or HLCL NOTE This definition is aimed at clarifying that the fault condition is not the one relevant to the load. BS EN 166032020:2018EN 16603-20-20:2018 (E) 10 3.2.5 fault current emission maximum current emission of a given circuit at external interface under abnormal condition
45、s NOTE Abnormal in this context can cover fault condition or operator error. 3.2.6 fault current tolerance minimum abnormal interface current that a circuit can sustain without being damaged 3.2.7 fault voltage emission maximum voltage emission of a given circuit at external interface under abnormal
46、 conditions NOTE Abnormal condition can cover fault condition or operator error. 3.2.8 fault voltage tolerance minimum abnormal interface voltage that a circuit can sustain without being damaged 3.2.9 feature part of a function to which a specific requirement refers 3.2.10 heater latching current li
47、miter HLCL LCL used as protection element in a power distribution to satellite thermal heaters 3.2.11 input filter charge time time required for the LCL to charge the load input filter NOTE See Figure 3-3. 3.2.12 input overshoot charge charge requested at the LCL/RLCL/HLCL input at the application o
48、f an overload, for current in excess of the actual limitation current NOTE See Figure 3-1 and Figure 3-2. 3.2.13 latching current limiter LCL switchable and latching protection placed between a power source and the relevant load, causing a trip-off after having achieved at its output an overcurrent
49、limitation for a definite trip-off time BS EN 166032020:2018EN 16603-20-20:2018 (E) 11 3.2.14 LCL class maximum allowable current that can flow through the LCL itself, under given standard conditions NOTE LCL classes are defined in Table 3-1. 3.2.15 LCL switch dissipative failure failure corresponding to an equivalent gate to drain short circuit on a MOSFET NOTE The voltage across is approximately 4 V to 5 V maximum. 3.2.16 nominal condition operative condition of the LCL/RLCL/HLCL, with no internal failure 3.2.17 repetitive overload overcurrent ev
