1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Part 3: Protection of persons against electric shockICS 43.120Fuel cell road vehicles Safety specif
2、ications BRITISH STANDARDBS ISO 23273-3:2006BS ISO 23273-3:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 December 2006 BSI 2006ISBN 0 580 49773 9Amendments issued since publicationAmd. No. Date Commentscontract. Users are responsible
3、 for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard was published by BSI. It is the UK implementation of ISO 23273-3:2006.The UK participation in its preparation was entrusted to Technical Committee PEL/
4、69, Electric vehicles.A list of organizations represented on PEL/69 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a Reference numberISO 23273-3:2006(E)INTERNATIONAL STANDARD ISO23273-3First edition2006-11-15Fuel cell road veh
5、icles Safety specifications Part 3: Protection of persons against electric shock Vhicules routiers aliments par pile combustible Spcifications de scurit Partie 3: Protection des personnes contre les dcharges lectriques BS ISO 23273-3:2006ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative refere
6、nces . 1 3 Terms and definitions. 2 4 Environmental and operational conditions5 5 Voltage classes of electric circuits. 5 6 Marking 5 6.1 Electric equipment 5 6.2 Identification of voltage class B wiring 5 7 Measures for the protection of persons against electric shock 6 7.1 General. 6 7.2 Basic pro
7、tection measures 6 7.3 Protection under first failure conditions 6 7.4 Complementary or alternative approach to protection measures against electric shock 7 8 Test methods and requirements for the protection measures against electric shock . 8 8.1 General. 8 8.2 Insulation . 8 8.3 Requirements for b
8、arriers/enclosures 10 Bibliography . 11 BS ISO 23273-3:2006iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical comm
9、ittees. Each member body interested in a subject for which a technical committee has been established has the right to 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
10、International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft Internation
11、al Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be th
12、e subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 23273-3 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 21, Electrically propelled road vehicles. ISO 23273 consists of the following parts, under the genera
13、l title Fuel cell road vehicles Safety specifications: Part 1: Vehicle functional safety Part 2: Protection against hydrogen hazards for vehicles fuelled with compressed hydrogen Part 3: Protection of persons against electric shock BS ISO 23273-3:20061Fuel cell road vehicles Safety specifications Pa
14、rt 3: Protection of persons against electric shock 1 Scope This part of ISO 23273 specifies the essential requirements of fuel cell vehicles (FCV) for the protection of persons and the environment inside and outside the vehicles against electric shock. It applies only to on-board electric circuits w
15、ith working voltages between 25 V a.c. and 1 000 V a.c., or 60 V d.c. and 1 500 V d.c. respectively (for details on voltage class B, see Clause 5). This International Standard does not apply to: FCV connected to an external electric power supply; component protection; or manufacturing, maintenance a
16、nd repair. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3864-2, Gra
17、phical symbols Safety colours and safety signs Part 2: Design principles for product safety labels ISO 6469-1, Electric road vehicles Safety specifications Part 1: On-board electrical energy storage ISO 20653, Road vehicles Degree of protection (IP-Code) Protection of electrical equipment against fo
18、reign objects, water and access ISO 23273-1, Fuel cell road vehicles Safety specifications Part 1: Vehicle functional safety IEC 60417, Graphical symbols used on equipment Annex K IEC 60479-1, Effects of current on human beings and livestock Part 1: General aspects IEC 60664-1, Insulation coordinati
19、on for equipment within low-voltage systems Part 1: Principles, requirements and tests BS ISO 23273-3:20062 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 air processing system system that processes (e.g. that filters, meters, conditions and
20、 pressurizes) the incoming air for the fuel cell system 3.2 auxiliary electric circuit electrical circuit supplying vehicle functions other than for propulsion, such as lamps, windscreen (windshield) wiper motors and radios 3.3 balance of fuel cell power system remaining portion of the electric circ
21、uit of the fuel cell power system when the power sources (i.e. fuel cell stacks, batteries, etc.) are disconnected 3.4 barrier part providing protection against direct contact from any usual direction of access 3.5 basic insulation insulation applied to live parts for protection against direct conta
22、ct under fault-free conditions NOTE Basic insulation does not necessarily include insulation used exclusively for functional purposes. 3.6 basic protection protection against direct contact with live parts under fault-free conditions 3.7 battery cell basic rechargeable energy storage device, consist
23、ing of electrodes, electrolyte, container, terminals and usually separators, that is a source of electric energy obtained by direct conversion of chemical energy 3.8 battery pack single mechanical assembly comprising battery cells and retaining frames or trays and possibly components for battery man
24、agement 3.9 chassis-bonded electric connection of one point of an electric circuit with the electric chassis 3.10 conductive part part capable of conducting electric current 3.11 direct contact contact of persons with live parts 3.12 double insulation insulation comprising both basic insulation and
25、supplementary insulation 3.13 electric chassis conductive mechanical structure of the vehicle including all associated electric and electronic components, whose parts are electrically connected and whose potential is taken as reference BS ISO 23273-3:200633.14 electric circuit collection of connecte
26、d devices through which electric current is intended to flow 3.15 dc/dc converter set of equipment for the conversion of direct current of one voltage to direct current of another voltage and/or for isolating purposes 3.16 electric shock physiological effect resulting from an electric current passin
27、g through a human body 3.17 enclosure part providing protection of equipment against certain external influences and against direct contact from any direction NOTE External influences can include the ingress of dust or water, prevention of mechanical damage. 3.18 exposed conductive part conductive p
28、art that can be touched by a test probe according to a protection degree as specified in ISO 20653 3.19 fuel cell electrochemical device that generates electricity by the conversion of fuel and an oxidant without any physical or chemical consumption of the electrodes or electrolyte 3.20 fuel cell po
29、wer system combination of the fuel cell system, dc/dc converter(s), power unit and RESS, if any 3.21 fuel cell stack assembly of two or more fuel cells, which are electrically connected 3.22 fuel cell system system, typically containing the following subsystems: fuel cell stack, air processing syste
30、m, fuel processing system, thermal management, water management, and their control system 3.23 fuel cell vehicle FCV vehicle that receives propulsion power from an on-board fuel cell power system NOTE The general term FCV includes also vehicles with an additional other source of propulsion power. 3.
31、24 fuel processing system system that converts (if necessary), and/or conditions the fuel as stored in the on-board fuel storage into fuel suitable for operation in the fuel cell stack 3.25 insulation resistance monitoring system system, which periodically or continuously monitors the insulation res
32、istance between live parts and the electric chassis BS ISO 23273-3:20064 3.26 live part conductor or conductive part intended to be electrically energized in normal use NOTE “electrically energized” means such conductor or conductive part can have an electric potential against the electric chassis.
33、3.27 maximum working voltage highest value of a.c. voltage (rms) or of d.c. voltage which may occur in an electric system under any normal operating conditions, according to manufacturers specifications, disregarding transients 3.28 potential equalization electric connection of exposed conductive pa
34、rts of the electric equipment to minimize differences in potential 3.29 protection degree protection provided by a barrier/enclosure related to the contact with live parts by a test probe, such as a test finger (IPXXB), a test rod (IPXXC) or a test wire (IPXXD), as defined in ISO 20653 3.30 power un
35、it combination of electric motor, associated power electronics, and their associated controls for the purpose of vehicle propulsion 3.31 rechargeable energy storage system RESS system that stores energy and is rechargeable by on board and/or external energy sources and associated controls, if any EX
36、AMPLES These include batteries, capacitors and electromechanical flywheels. 3.32 reinforced insulation insulation of live parts for protection against electric shock equivalent to double insulation NOTE Reinforced insulation does not imply that the insulation must be a homogeneous piece. The reinfor
37、ced insulation may comprise several layers which cannot be tested individually as supplementary or basic insulation. 3.33 supplementary insulation independent insulation applied in addition to basic insulation for protection against electric shock in the event of a failure of the basic insulation 3.
38、34 traction battery collection of all battery packs, which are electrically connected for the supply of energy to the power unit and possibly auxiliary systems 3.35 voltage class A electric circuit electric circuit with a maximum working voltage of u 25 V a.c. or u 60 V d.c. respectively 3.36 voltag
39、e class B electric circuit electric circuit with a maximum working voltage of ( 25 and u 1 000) V a.c. or ( 60 and u 1 500) V d.c. respectively BS ISO 23273-3:200654 Environmental and operational conditions The requirements given in this part of ISO 23273 shall be met across the range of environment
40、al and operational conditions for which the vehicle is designed to operate, as specified by the vehicle manufacturer. 5 Voltage classes of electric circuits Depending on its maximum working voltage, U, an electric circuit belongs to one of the voltage classes specified in Table 1. Table 1 Voltage cl
41、asses of electric circuits Maximum working voltage Voltage class d.c. systems V a.c. systems (15 Hz to 150 Hz) V (rms) A 0 U u 60 0 U u 25 B 60 U u 1 500 25 U u 1 000 NOTE 1 The values 60 V d.c./25 V a.c. are selected taking into account humid weather conditions. For non a.c. but repetitive pulse vo
42、ltages, if peak duration is above 10 ms, the considered working voltage is then the maximum peak value. If the peak duration is less than 10 ms, the working voltage is then the rms value. The reported a.c. voltage values are the most critical within the specified frequency range. NOTE 2 The d.c. vol
43、tage is u 10 % ripple voltage (rms). The upper voltage of class B can be lower according to national requirements. 6 Marking 6.1 Electric equipment The symbol shown in Figure 1 shall appear near voltage class B voltage sources, e.g. fuel cell stacks, batteries, super-capacitors. The same symbol shal
44、l be visible on barriers and enclosures which, when removed, expose live parts of class B circuits and/or basic insulation. The symbol (background: yellow; bordering and symbol: black) shall be according to IEC 60417 and ISO 3864-2. Figure 1 Marking of voltage class B voltage equipment 6.2 Identific
45、ation of voltage class B wiring Harnesses containing voltage class B cables shall be visually identified with a permanent orange harness covering material. BS ISO 23273-3:20066 7 Measures for the protection of persons against electric shock 7.1 General Hazards of electric shock can occur when electr
46、ic current passes through the human body (see IEC 60479-1). Such body current shall not exceed 10 mA continuously. Protection against electric shock therefore means: either preventing a person from simultaneously coming into contact with two or more live parts having different electric potentials or
47、 a voltage between them; or limiting the current and its duration in case of such contact. Protection against electric shock shall be comprised of: basic protection (protection against direct contact with live parts of any voltage class B electric circuit under normal operating (fault free) conditio
48、ns); and protection under any first failure condition with respect to electric shock. The protection measures described in 7.2 and 7.3 shall meet the requirements according to test methods specified in Clause 8. NOTE 1 See IEC 60664-1 for guidance. NOTE 2 For functional reasons, measures similar to
49、those against electric shock may be also provided for voltage class A electric circuits. Such measures are not covered by this part of ISO 23273. 7.2 Basic protection measures Persons shall be protected against direct contact with the live parts of any voltage class B electric circuit. Protection measures against direct contact shall be provided by either one or both of the following: basic insulation of the live parts; barriers/enclosures, preventing access to the live parts. T
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