1、BSI Standards PublicationBS ISO 27027:2014Aerospace Solid-stateremote power controllers General performancerequirementsBS ISO 27027:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 27027:2014. It supersedes BS ISO 27027:2008 which is withdrawn.The UK partic
2、ipation in its preparation was entrusted to Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology.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 o
3、f a contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 79259 5 ICS 49.060 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under
4、the authority of the Standards Policy and Strategy Committee on 31 October 2014.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e d ISO 2014Aerospace Solid-state remote power controllers General performance requirementsAronautique et espace Contacteurs-disjoncteurs statiques c
5、ommands distance Exigences gnrales de performanceINTERNATIONAL STANDARDISO 27027Second edition 2014-10-15Reference number ISO 27027:2014(E)BS ISO 27027:2014ISO 27027:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of
6、 this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body i
7、n the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 27027:2014ISO 27027:2014(E)Contents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Te
8、rms and definitions . 14 Requirements 44.1 Detail requirements 44.2 Electrical characteristics 44.3 Performance 45 Quality assurance provisions 65.1 Electrical characteristics 6 ISO 2014 All rights reserved iiiBS ISO 27027:2014ISO 27027:2014(E)ForewordISO (the International Organization for Standard
9、ization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to
10、be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used
11、to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of
12、the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified
13、during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the
14、 meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC
15、 20, Aircraft and space vehicles, Subcommittee SC 1, Aerospace electrical requirements.This second edition cancels and replaces the first edition (ISO 27027:2008), which has been technically revised.iv ISO 2014 All rights reservedBS ISO 27027:2014ISO 27027:2014(E)IntroductionThis International Stand
16、ard is the general performance requirements of the solid state (remote) power controller (SSPC) for aerospace.Trend of aircrafts electric power system will be toward high voltage system. To accompany that trend, arc fault in the aircrafts wiring will become one of the major problems for the electric
17、 power distribution system. This second edition takes into account the arc fault detection.The purpose of this International Standard, the definitions of SSPC and the contents of the document are as follows:a) The purpose of this International Standard1) To standardize the requirements for SSPC thos
18、e are physically and environmentally diversified.2) To provide the applicable standard document for various SSPC.b) The definitions of SSPC1) Consists of a solid-state switching device and its driver circuit.2) Turns on/off the power output by receiving the control signal.3) Detects the over current
19、 in the load which results in limiting this current or shutting down for this current and/or optionally detects the arc fault in the circuit which results in shutting down the fault.4) Indicates the on/off status of the power output.c) The contents of this International Standard1) Definitions of the
20、 technical term.2) Electrical requirements.3) Test methods.In order to satisfy the purpose of this International Standard, requirements such as physical, environmental, and individual items are specified in accordance with the detail requirements that are issued individually. ISO 2014 All rights res
21、erved vBS ISO 27027:2014BS ISO 27027:2014Aerospace Solid-state remote power controllers General performance requirements1 ScopeThis International Standard specifies the definitions, titles of general performance requirements, and test methods to determine the performance of solid state (remote) powe
22、r controller (SSPC) for use in aerospace electrical power systems.The SSPC consists of solid state-switching device(s) and associated solid-state circuitry for protection, action of control signals, and providing status information.2 Normative referencesThe following documents, in whole or in part,
23、are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1540, Aerospace Characteristics of aircraft electr
24、ical systemsISO 7137, Aircraft Environmental conditions and test procedures for airborne equipment3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1arc faultsustained luminous discharge of electricity across a gap in a circuit or between conductor
25、sNote 1 to entry: Arc impedance can reduce low-voltage fault current magnitudes appreciably.3.2current limitingfunction to limit the power output current to the required level within required time from overload or short circuit conditions which is shown in Figure 23.3load voltagevoltage between the
26、power output terminal of the SSPC and the power ground3.4load voltage rise and fall time (D.C. devices and non-zero crossing turn-off A.C. devices)time interval between 10 % and 90 % of the steady state load voltage value which is shown in Figure 1 a) for D.C. devices3.5off statecondition which, wit
27、h the turn-off signal applied, the device prevents power from being passed to the load3.6on statecondition which, with the turn-on signal applied, the device allows power to be passed to the loadINTERNATIONAL STANDARD ISO 27027:2014(E) ISO 2014 All rights reserved 1BS ISO 27027:2014ISO 27027:2014(E)
28、3.7parallel arc faultarc fault condition in which arcing occurs in a circuit from line-to-line or line-to-ground and not through any load(s)Note 1 to entry: Only the arc impedance and the system current impedance limit the magnitude of the arc fault current.3.8peak let-through currentpeak value of t
29、he current at maximum system voltage that the SSPC will conduct for a specified time interval without damage3.9power dissipationpower dissipation which includes all power dissipated in the power switching circuit, power losses due to internal leakage currents, and power suppliesNote 1 to entry: When
30、 SSPC is OFF, the power dissipation includes only dissipation due to leakage currents and internal power supplies.3.10resetrestoration of the tripped SSPC to a state from which it can be turned ON3.11reverse currentcurrent into the load terminal of the SSPC from the load energy source3.12series arc
31、faultarc fault condition in which the current passes through the arc and each circuit loadNote 1 to entry: The load equipment limits the magnitude of the arc fault current.3.13short circuitcircuit with the impedance of less then 1 m applied between the output terminal and ground3.14soft on/offfuncti
32、on for the power output current to increase linearly with turn-on signal and to decrease linearly with turn-off signal3.15supply voltagevoltage applied between the power input terminal of the SSPC and the power ground3.16tripautomatic reversion to the OFF state of the SSPC output caused by an overlo
33、ad condition or detection of arc fault3.17trip curvecurve which sets the minimum and maximum trip points of the SSPC and is plotted as current verses time3.18trip freefeature which will prevent subsequent re-closing unless preceded by a reset signal, when the SSPC has tripped due to an overcurrent c
34、ondition or detection of arc fault2 ISO 2014 All rights reservedBS ISO 27027:2014ISO 27027:2014(E)3.19trip timetime interval between the application of an overcurrent condition or detection of arc fault and the 10 % value of rated output currentNote 1 to entry: In general, the higher the overcurrent
35、 condition, the shorter is the trip time.3.20turn-off signalcontrol signal level at which the power controller is turned OFF3.21turn-on signalcontrol signal level at which the power controller is turned ON3.22turn-off timeA.C. devices with zero-crossing turn-offtime interval between initiation of tu
36、rn-off signal and the time when the output switch is OFF at zero crossingNote 1 to entry: Shown in Figure 1 b).3.23turn-off timeD.C. devices and non-zero crossing turn-off A.C. devicestime interval between initiation of turn-off signal and the time when the output reach 10 % of its steady-state ON v
37、alueNote 1 to entry: Shown in Figure 1 a).3.24turn-on timeA.C. devices with zero-crossing turn-ontime interval between initiation of turn-on signal and the time when the output switch is ON at zero crossingNote 1 to entry: Shown in Figure 1 b).3.25turn-on timeD.C. devices and non-zero crossing turn-
38、on A.C. devicestime interval between initiation of turn-on signal and the time when the output reach 90 % of its steady-state ON valueNote 1 to entry: Shown in Figure 1 a).3.26unwanted triptripping function in response to a condition that is not an arcing fault but a condition that occurs as part of
39、 the normal or anticipated operation of circuit componentsNote 1 to entry: Nuisance trip is synonymous with unwanted trip.3.27voltage dropvoltage across load and line terminals of the SSPC in the ON state at the specified load3.28zero voltage turn-on/zero current turn-off (A.C. devices only)characte
40、ristic that requires the SSPC to turn ON and turn OFF only at the half-cycle zero-crossing point, regardless of when the control signal is applied or removed ISO 2014 All rights reserved 3BS ISO 27027:2014ISO 27027:2014(E)4 Requirements4.1 Detail requirementsThe individual item requirements shall be
41、 specified in accordance with the detail requirements that are issued individually. It is recommended to use ISO 7137 for the specification of environmental conditions and test procedures for the SSPCs installed in the airborne equipment.4.2 Electrical characteristicsWhen tested as specified in 5.1,
42、 the SSPC shall operate with supply voltage variations in accordance with ISO 1540 or the detail requirements, and the SSPC shall be capable of controlling all type of loads as required by the detail requirements.4.3 Performance4.3.1 Control signalsWhen tested as specified in 5.1.2, the control sign
43、als shall be as specified in the detail requirements.4.3.2 Turn-on and turn-off timeWhen tested as specified in 5.1.3, the turn-on and turn-off time shall be as specified in the detail requirements.4.3.3 Load voltage rise and fall time (soft on/off function)When tested as specified in 5.1.4, the ris
44、e and fall time as the soft on/off function shall be as specified in the detail requirements.4.3.4 IsolationThe control/power isolation test voltage shall be as specified in the detail requirements, when tested as specified in 5.1.5.4.3.5 Control signal levelsWhen tested as specified in 5.1.6, the c
45、ontrol signal levels shall be as specified (see 4.1). Where maximum control signals are specified (see 4.1) the signal shall be applied for 10 min without any damage to the SSPC.4.3.6 Voltage dropWhen tested as specified in 5.1.7, the voltage drop shall not exceed the values specified in the detail
46、requirements for load current values from no load to 100 % rated.4.3.7 Off-state leakage currentWhen tested as specified in 5.1.8, the leakage current shall not exceed the values specified in the detail requirements.4.3.8 Off-state output voltageWhen tested as specified in 5.1.9, the output voltage
47、shall not exceed the values specified in the detail requirements.4 ISO 2014 All rights reservedBS ISO 27027:2014ISO 27027:2014(E)4.3.9 Power dissipationWhen tested as specified in 5.1.10, the power dissipation shall not exceed the values specified in the detail requirements.4.3.10 Overload character
48、istics4.3.10.1 Current limitingWhen specified in the detail requirements and tested as specified in 5.1.11.1, the output current shall be within the trip curve specified. At the initiation of the overload condition, the peak let through current (see 4.1) shall not exceed the value specified.4.3.10.2
49、 Trip characteristics with the overload conditionWhen tested as specified in 5.1.11.2, the SSPC shall not reset until commanded, the trip time shall be within the trip curve specified in the detail requirements without any damage.4.3.11 State indicationThe SSPC shall provide the means of state indication specified in the detail requirements when tested as specified in 5.1.12. State indication shall include the detection of load current above or below a minimum current threshold and the presence or absence of drive to the output pow
