ISO/DIS 17409.2

Electrically propelled road vehicles -- Connection to an external electric power supply -- Safety requirements

Véhicules routiers à propulsion électrique -- Connexion à une borne d'alimentation électrique externe -- Exigences de sécurité

Standards Content (sample)

DRAFT INTERNATIONAL STANDARD
ISO/DIS 17409.2
ISO/TC 22/SC 21 Secretariat: DIN
Voting begins on: Voting terminates on:
2014-03-14 2014-05-14
Electrically propelled road vehicles — Connection to an
external electric power supply — Safety requirements

Véhicules routiers à propulsion électrique — Connexion à une borne d’alimentation électrique externe —

Exigences de sécurité
ICS: 43.120
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
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USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 17409.2:2014(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2014
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ISO/DIS 17409.2:2014(E)
Copyright notice

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ii © ISO 2014 – All rights reserved
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ISO/DIS 17409.2
Contents Page

1 Scope ...................................................................................................................................................... 1

2 Normative references ............................................................................................................................ 1

3 Terms and definitions ........................................................................................................................... 2

4 Environmental conditions .................................................................................................................... 6

5 Requirements for protection of persons against electric shock ...................................................... 6

5.1 Basic protection .................................................................................................................................... 6

5.2 Protection under single failure conditions ......................................................................................... 7

5.3 Isolation resistance ............................................................................................................................... 8

5.3.1 A.c. connection (Mode 1, 2 and 3) ....................................................................................................... 8

5.3.2 D.c. connection (Mode 4) ...................................................................................................................... 8

5.4 Protection from unintended voltage .................................................................................................... 8

5.4.1 Mode 1 .................................................................................................................................................... 8

5.4.2 Mode 2 and mode 3 ............................................................................................................................... 8

5.4.3 Mode 4 .................................................................................................................................................... 9

5.5 Insulation coordination ......................................................................................................................... 9

5.5.1 General ................................................................................................................................................... 9

5.5.2 A.c. connection (Mode 1, 2 and 3) ..................................................................................................... 10

5.5.3 D.c. connection (Mode 4) .................................................................................................................... 10

6 Protection against thermal incident .................................................................................................. 10

6.1 Overcurrent protection ....................................................................................................................... 10

6.1.1 Overload protection ............................................................................................................................ 10

6.1.2 Short-circuit protection for a.c. connection ..................................................................................... 10

6.1.3 Short-circuit protection for d.c. connection ..................................................................................... 11

6.2 Arc protection for d.c. connections ................................................................................................... 11

6.3 Residual energy after disconnection ................................................................................................ 11

7 Specific requirements for the vehicle inlet, plug and cable ............................................................ 11

7.1 Requirements for the plug and cable ................................................................................................ 11

7.2 Requirements for the vehicle inlet ..................................................................................................... 11

8 Additional requirements for a.c. electric power supply .................................................................. 12

8.1 Standard a.c. external electric power supply conditions for operation in service ....................... 12

8.2 Current characteristics ....................................................................................................................... 12

8.3 D.c. fault currents ................................................................................................................................ 12

8.4 Touch current ...................................................................................................................................... 13

8.5 Unintended reverse power flow ......................................................................................................... 13

8.6 Power factor ......................................................................................................................................... 13

9 Additional requirements for d.c. electric power supply .................................................................. 13

9.1 Disconnection device .......................................................................................................................... 13

9.2 Control pilot functions ........................................................................................................................ 13

9.3 Vehicle isolation resistance monitoring system .............................................................................. 13

9.4 Locking of the vehicle connector ...................................................................................................... 14

9.5 A.c. or d.c. electric power at the same contacts .............................................................................. 14

9.6 Contact temperature at vehicle inlet ................................................................................................. 15

9.7 Overvoltage in case of a load dump .................................................................................................. 15

9.8 Unintended reverse power flow ......................................................................................................... 15

9.9 Y capacitances ..................................................................................................................................... 15

10 Operational requirements ................................................................................................................... 15

11 User manual and marking................................................................................................................... 15

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ISO/DIS 17409.2

11.1 Owner's guide or manual ....................................................................................................................15

11.2 Marking .................................................................................................................................................16

12 Test procedure .....................................................................................................................................16

12.1 General note on tests ..........................................................................................................................16

12.2 Resistance of protective conductor ...................................................................................................16

12.3 Isolation resistance test ......................................................................................................................16

12.3.1 Preconditioning and conditioning .....................................................................................................16

12.3.2 Isolation resistance measurements at the vehicle inlet or plug .....................................................16

12.4 Withstand voltage test ........................................................................................................................17

12.4.1 General ..................................................................................................................................................17

12.4.2 Preconditioning and conditioning .....................................................................................................17

12.4.3 Test procedure .....................................................................................................................................17

12.4.4 Test voltage ..........................................................................................................................................18

12.5 Touch current .......................................................................................................................................18

iv © ISO 2014 – All rights reserved
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ISO/DIS 17409.2
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 committees. 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

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 International 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 the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 17409 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 21,

Electrically propelled road vehicles.

This second/third/... edition cancels and replaces the first/second/... edition (), [clause(s) / subclause(s) /

table(s) / figure(s) / annex(es)] of which [has / have] been technically revised.

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DRAFT INTERNATIONAL STANDARD ISO/DIS 17409.2
1 Electrically propelled road vehicles — Connection to an
2 external electric power supply — Safety requirements
3 1 Scope

4 This standard specifies electric safety requirements for conductive connection of electrically propelled road

5 vehicles to an external electric power supply using a plug or vehicle inlet.

6 It applies to electrically propelled road vehicles with voltage class B electric circuits. In general it may apply to

7 motorcycles and mopeds if no dedicated standards for these vehicles exist.

8 It applies only to vehicle power supply circuits. It applies also to dedicated power supply control functions used

9 for the connection of the vehicle to an external electric power supply.

10 It does not provide requirements regarding the connection to a non-isolated d.c. charging station.

11 It does not provide comprehensive safety information for manufacturing, maintenance and repair personnel.

12 The requirements when not connected to off-board equipment of the external electric power supply are

13 specified in ISO 6469-3.

14 NOTE 1 This standard does not contain requirements for class II vehicle power supply circuits using protection by class II

15 or double/reinforced insulation but it is not the intention to exclude such vehicle applications.

16 NOTE 2 Requirements for EV supply equipment are specified in IEC 61851.
17 2 Normative references

18 The following referenced documents are indispensable for the application of this document. For dated

19 references, only the edition cited applies. For undated references, the latest edition of the referenced

20 document (including any amendments) applies.

21 ISO 6469-1, Electrically propelled road vehicles - Safety specifications – Part 1: On-board rechargeable

22 energy storage system (RESS)

23 ISO 6469-3:2011, Electrically propelled road vehicles - Safety specifications – Part 3: Protection of persons

24 against electric shock

25 ISO 13849 (all parts), Safety of machinery – Safety-related parts of control systems

26 ISO 20653, Road vehicles – Degrees of protection (IP-Code) – Protection of electrical equipment against

27 foreign objects, water and access
28 ISO 26262 (all parts), Road vehicles - Functional safety

29 IEC 60309-1, Plugs, socket-outlets and couplers for industrial purposes – Part 1: General requirements

30 IEC 60309-2, Plugs, socket-outlets and couplers for industrial purposes – Part 2: Dimensional

31 interchangeability requirements for pin and contact-tube accessories
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ISO/DIS 17409.2

32 IEC 60364-5-54, Electrical installations of buildings - Part 5-54: Selection and erection of electrical equipment

33 - Earthing arrangements, protective conductors and equipotential bonding

34 IEC 60664 (all parts), Insulation coordination for equipment within low-voltage systems – Part 1: Principles,

35 requirements and tests

36 IEC 60884-1, Plugs, socket-outlets and couplers for household and similar purposes – Part 1: General

37 requirements

38 IEC 60950-1:2005, Information technology equipment – Safety – Part 1: General requirements

39 IEC 60990:1999, Methods of measurements of touch current and protective conductor current

40 IEC 61851-1, Electric vehicle conductive charging system – Part 1: General requirements

41 IEC 61851-23, Electric vehicle conductive charging system – Part 23: D.C. electric vehicle charging station

42 (Under development)

43 IEC 62196-1, Plugs, socket-outlets, vehicle connectors and vehicle inlets – conductive charging of electric

44 vehicles – Part 1: General requirements

45 IEC 62196-2, Plugs, socket-outlets, vehicle connectors and vehicle inlets – conductive charging of electric

46 vehicles – Part 2: Dimensional compatibility and interchangeability requirements for a.c. pin and contact-tube

47 accessories

48 IEC 62196-3, Plugs, socket-outlets, vehicle connectors and vehicle inlets – conductive charging of electric

49 vehicles – Part 3: Dimensional compatibility and interchangeability requirements for dedicated d.c. and

50 combined a.c./d.c. pin and contact-tube vehicle couplers (Under development)

51 ISO/IEC 15118 (all parts), Road vehicles -- Vehicle to grid communication interface

52 3 Terms and definitions
53 For the purposes of this document, the following terms and definitions apply.
54 3.1
55 balance of electric power system

56 remaining portion of a voltage class B electric circuit when all RESS and fuel cell stacks are disconnected

57 3.2
58 barrier

59 part providing protection against direct contact from any usual direction of access

60 3.3
61 basic insulation
62 insulation of hazardous-live-parts which provides basic protection
63 3.4
64 case A

65 connection of an EV to the a.c. supply network (mains) utilizing a supply cable and plug permanently attached

66 to the EV
67 3.5
68 case B

69 connection of an EV to the a.c. supply network (mains) utilizing a detachable cable assembly with a vehicle

70 connector and a.c. supply equipment
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ISO/DIS 17409.2
71 3.6
72 case C

73 connection of an EV to the a.c. supply network (mains) utilizing a supply cable and vehicle connector

74 permanently attached to the supply equipment.

75 NOTE Case C is the only connection case for mode 4 charging (see IEC 61851-1).

76 3.7
77 charger

78 power converter at the vehicle power supply circuit which supplies electric power, e.g. for charging a RESS

79 3.8
80 conductive part
81 part capable of conducting electric current
82 3.9
83 control pilot circuit

84 a circuit designed for the transmission of signals and/or communication between an EV and an EV supply

85 equipment
86 NOTE: In mode 2, circuit between an EV and an ICCB.
87 3.10
88 control pilot conductor

89 insulated conductor incorporated in an EV cable assembly, that creates, together with the protective

90 conductor, the control pilot circuit.
91 3.11
92 control pilot function

93 functionality used to monitor and control the interaction between the electric vehicle and the supply equipment

94 3.12
95 d.c. EV charging station
96 EV supply equipment intended to supply DC current to an EV
97 3.13
98 direct contact
99 contact of persons with live parts
100 3.14
101 double insulation
102 insulation comprising both basic insulation and supplementary insulation
103 3.15
104 electric chassis

105 conductive parts of a vehicle that are electrically connected and whose potential is taken as reference

106 3.16
107 electric shock

108 physiological effect resulting from an electric current passing through a human body

109 3.17
110 electric vehicle/electric road vehicle (EV)

111 any vehicle propelled by an electric motor drawing current from a RESS intended primarily for use on public

112 roads
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ISO/DIS 17409.2
113 3.18
114 enclosure

115 part providing protection of equipment against direct contact from any direction

116 3.19
117 EV supply equipment

118 equipment or combined equipment providing dedicated functions for an electric power supply from a fixed

119 installation to an EV for the purpose of charging for all dedicated charging modes and cases of connection

120 3.20
121 exposed conductive part

122 conductive part of the electric equipment, which can be touched by a test finger according to IPXXB (see ISO

123 20653) after removing barriers/enclosures which can be removed without using tools and which is not

124 normally live, but which may become live under fault conditions
125 3.21
126 external electric power supply

127 electric power source that is not part of the vehicle for supplying electric energy to an EV using an EV supply

128 equipment
129 3.22
130 in-cable control box (ICCB)

131 device incorporated in the mode 2 cable assembly, which performs control functions and safety functions

132 NOTE The in-cable control box is located in a detachable cable assembly or plug that is not part of the fixed

133 installation.
134 3.23
135 isolation resistance

136 resistance between live parts of voltage class B electric circuit and the electric chassis as well as the voltage

137 class A system
138 3.24
139 live conductor (line and neutral)

140 conductor which is energized in normal operation and capable of contributing to the transmission or

141 distribution of electric energy
142 3.25
143 live part

144 conductor or conductive part intended to be electrically energized in normal use

145 3.26
146 maximum working voltage

147 highest value of a.c. voltage (rms) or of d.c. voltage which may occur in an electric system under any normal

148 operating conditions according to manufacturer’s specifications, disregarding transients

149 3.27
150 mode 1

151 connection of the EV to the a.c. supply network (mains) utilizing a cable and plug, that is not fitted with any

152 supplementary pilot or auxiliary contacts, and connects to a standard socket-outlet

153 3.28
154 mode 2

155 connection of the EV to the a.c. supply network (mains) utilizing a cable and plug connected to a standard

156 socket-outlet, with a control pilot function and system for personal protection against electric shock placed

157 between the EV and the socket outlet
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ISO/DIS 17409.2
158 3.29
159 mode 3

160 connection of the EV utilizing EV supply equipment permanently connected to the a.c. supply network (mains),

161 and where the control pilot function extends to control equipment in the EV Supply equipment

162 3.30
163 mode 4

164 connection of the EV to the a.c. or d.c. supply network (mains) utilizing a d.c. EV supply equipment or d.c. EV

165 charging station using a control pilot function
166 3.31
167 non-isolated d.c. EV charging station

168 d.c. EV charging station with d.c. circuit on output side which is not electrically separated by at least basic

169 isolation from the supply system
170 3.32
171 plug

172 accessory having contacts designed to engage with the contacts of a socket-outlet, also incorporating means

173 for the electrical connection and mechanical retention of flexible cables or cords

174 3.33
175 protective conductor (PE)

176 conductor provided for purposes of safety, for example protection against electric shock

177 3.34
178 rechargeable energy storage system / RESS

179 system that stores energy for delivery of electric energy and which is rechargeable

180 EXAMPLE batteries, capacitors
181 3.35
182 reinforced insulation

183 insulation of hazardous-live-parts which provides a degree of protection against electric shock equivalent to

184 double insulation

185 NOTE Reinforced insulation may comprise several layers which cannot be tested singly as basic insulation or

186 supplementary insulation
187 3.36
188 residual current device (RCD)

189 mechanical switching device or association of devices designed to make, carry and break currents under

190 normal service conditions and to cause the opening of the contacts when the residual current attains a given

191 value under specified conditions

192 NOTE A residual current device can be a combination of various separate elements designed to detect and evaluate

193 the residual current and to make and break current.
194 3.37
195 socket-outlet

196 accessory having socket-contacts designed to engage with the contacts of a plug and having terminals for the

197 connection of cables or cords
198 3.38
199 standard plug and socket-outlet

200 plug and socket-outlet which meets the requirements of any IEC and/or national standard that provides

201 interchangeability by standard sheets, excluding the specific EV accessories as defined in the IEC 62196

202 series

203 NOTE The standards IEC 60309-1, IEC 60309-2 and IEC 60884-1 define standard plugs and socket-outlets

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ISO/DIS 17409.2
204 3.39
205 supplementary insulation

206 independent insulation applied in addition to basic insulation for fault protection

207 3.40
208 vehicle connector

209 part of a vehicle coupler integral with, or intended to be attached to the cable assembly

210 3.41
211 vehicle coupler

212 means of enabling the manual connection of a flexible cable to an EV for the purpose of supplying electric

213 energy to an EV.
214 NOTE It consists of two parts: a vehicle connector and a vehicle inlet.
215 3.42
216 vehicle inlet

217 part of a vehicle coupler incorporated in, or fixed to, the EV or intended to be fixed to it

218 3.43
219 vehicle isolation resistance monitoring system

220 system which periodically or continuously monitors the isolation resistance between live parts of voltage class

221 B electric circuits and the electric chassis
222 3.44
223 vehicle power supply circuit

224 voltage class B electric circuit which includes all parts that are galvanically connected to the vehicle inlet (case

225 B, case C) or the plug (case A) and that is operational when connected to an external electric power supply

226 3.45
227 voltage class A

228 classification of an electric component or circuit as belonging to voltage class A, if its maximum working

229 voltage is ≤ 30 V a.c. (rms) or ≤ 60 V d.c. respectively
230 3.46
231 voltage class B

232 classification of an electric component or circuit as belonging to voltage class B, if its maximum working

233 voltage is (> 30 V and ≤ 1000) V a.c. (rms) or ( > 60 V and ≤ 1500) V d.c. respectively

234 4 Environmental conditions

235 The requirements given in this standard shall be met across the range of environmental conditions for which

236 the electric vehicle is designed to operate when connected to an external electric power supply, as specified

237 by the vehicle manufacturer.
238 NOTE See ISO 16750-4 for guidance.
239 5 Requirements for protection of persons against electric shock
240 5.1 Basic protection

241 In this section requirements for protection against direct contact at the vehicle inlet (case B and C) and at the

242 plug (case A) are specified.

243 Standard plug mated with standard socket-outlet (case A) shall comply with the requirements of relevant

244 standards, and the national requirements of the country where the product is placed on the market.

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ISO/DIS 17409.2

245 Plug according to IEC 62196 mated with socket-outlet according to IEC 62196 (case A) shall comply with the

246 degree of protection IPXXD at minimum in accordance with ISO 20653.

247 Mated portion of the vehicle inlet mated with vehicle connector (case B and case C) shall comply with IPXXD

248 at minimum in accordance with ISO 20653. The requirements for unmated contacts of such a vehicle inlet are

249 specified in 5.4.
250 5.2 Protection under single failure conditions

251 For mode 1, 2, 3 and 4, the plug (case A) or the vehicle inlet (case B and case C) shall have a contact for

252 connecting the vehicle electric chassis to the protective conductor of an external electric power supply.

253 To provide protection under single failure conditions, at least one of the following requirements shall be

254 fulfilled:

255  The protective conductor terminal of the plug (case A) or the vehicle inlet (case B and case C) shall be

256 connected to the vehicle electric chassis fulfilling the requirements for protective conductor connection. All

257 exposed conductive parts of the vehicle power supply circuit shall be connected to the vehicle electric

258 chassis fulfilling the requirements for the protective conductor connection. An example for this option is

259 given in Figure 1;
260
Charger with
Vehicle
galvanical separation
inlet
261
RESS
262
263
Protective
conductor
264
Potential equalization
Protective
according to ISO 6469-3
conductor
265
Electric chassis
Vehicle power supply circuit
266

267 Figure 1 — Connection between protective conductor and electric chassis – example for Option 1

268  The protective conductor terminal of the plug (case A) or the vehicle inlet (case B and case C) shall be

269 connected to exposed conductive parts of the vehicle power supply circuit fulfilling the requirements for

270 protective conductor connection. All exposed conductive parts of the on-board charging electric circuit

271 conductively connected to the external electric power supply shall be connected to the vehicle electric

272 chassis fulfilling the requirements for protective conductor connection. An example for th

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