ISO 6469-3:2021
Electrically propelled road vehicles — Safety specifications — Part 3: Electrical safety
This document specifies electrical safety requirements for voltage class B electric circuits of electric propulsion systems and conductively connected auxiliary electric systems of electrically propelled road vehicles.
It specifies electrical safety requirements for protection of persons against electric shock and thermal incidents.
It does not provide comprehensive safety information for manufacturing, maintenance and repair personnel.
NOTE 1 Electrical safety requirements for post-crash are described in ISO 6469-4.
NOTE 2 Electrical safety requirements for conductive connections of electrically propelled road vehicles to an external electric power supply are described in ISO 17409.
NOTE 3 Specific electrical safety requirements for magnetic field wireless power transfer between an external electric power supply and an electrically propelled vehicle are described in ISO 19363.
NOTE 4 Electrical safety requirements for motorcycles and mopeds are described in the ISO 13063 series.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Voltage classes
5 General requirements
5.1 Environmental and operational requirements
5.2 Marking
5.2.1 Marking of voltage class B electric components
5.2.2 Marking of voltage class B wiring
6 Requirements for protection of persons against electric shock
6.1 General requirements
6.1.1 General requirements for connected sections of a circuit
6.1.2 General requirements for voltage class B1
6.1.3 General requirements for voltage class B2
6.2 Basic protection
6.3 Fault protection and additional measures
6.3.1 Equipotential bonding
6.3.2 Isolation resistance
6.3.3 Provisions for capacitive coupling and capacitive discharge
6.3.4 De-energization
6.3.5 Alternative protection measures
6.4 General requirements for protective provisions
6.4.1 General
6.4.2 Requirements for insulation
6.4.3 Requirements for protective barriers and protective enclosures
6.4.4 Requirements for connectors
6.4.5 Insulation coordination
6.5 Alternative approach for protection against electric shock
7 Protection against thermal incidents
7.1 Overload protection
7.2 Short-circuit protection
8 Requirements for vehicle power supply circuit
9 Owner's manual
10 Test procedures
10.1 General
10.2 Continuity test for equipotential bonding
10.3 Isolation resistance measurements for voltage class B2 electric circuits
10.3.1 Preconditioning and conditioning
10.3.2 Isolation resistance measurements of the balance of electric circuits
10.3.3 Isolation resistance measurement of the voltage class B2 electric power sources
10.3.4 Isolation resistance measurement of entire electric circuits
10.4 Test for isolation resistance monitoring system
10.5 Touch current
10.6 Withstand voltage test
10.6.1 General
10.6.2 Preconditioning and conditioning
10.6.3 Test procedure
10.6.4 Test criteria
10.7 Withstand voltage test for electric power sources which are not de-energized
10.7.1 General
10.7.2 Preconditioning and conditioning
10.7.3 Test
10.7.4 Test criteria
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Voltage classes
5 General requirements
5.1 Environmental and operational requirements
5.2 Marking
5.2.1 Marking of voltage class B electric components
5.2.2 Marking of voltage class B wiring
6 Requirements for protection of persons against electric shock
6.1 General requirements
6.1.1 General requirements for connected sections of a circuit
6.1.2 General requirements for voltage class B1
6.1.3 General requirements for voltage class B2
6.2 Basic protection
6.3 Fault protection and additional measures
6.3.1 Equipotential bonding
6.3.2 Isolation resistance
6.3.3 Provisions for capacitive coupling and capacitive discharge
6.3.4 De-energization
6.3.5 Alternative protection measures
6.4 General requirements for protective provisions
6.4.1 General
6.4.2 Requirements for insulation
6.4.3 Requirements for protective barriers and protective enclosures
6.4.4 Requirements for connectors
6.4.5 Insulation coordination
6.5 Alternative approach for protection against electric shock
7 Protection against thermal incidents
7.1 Overload protection
7.2 Short-circuit protection
8 Requirements for vehicle power supply circuit
9 Owner's manual
10 Test procedures
10.1 General
10.2 Continuity test for equipotential bonding
10.3 Isolation resistance measurements for voltage class B2 electric circuits
10.3.1 Preconditioning and conditioning
10.3.2 Isolation resistance measurements of the balance of electric circuits
10.3.3 Isolation resistance measurement of the voltage class B2 electric power sources
10.3.4 Isolation resistance measurement of entire electric circuits
10.4 Test for isolation resistance monitoring system
10.5 Touch current
10.6 Withstand voltage test
10.6.1 General
10.6.2 Preconditioning and conditioning
10.6.3 Test procedure
10.6.4 Test criteria
10.7 Withstand voltage test for electric power sources which are not de-energized
10.7.1 General
10.7.2 Preconditioning and conditioning
10.7.3 Test
10.7.4 Test criteria
Bibliography