AS ISO 6469.3:2014 pdf free download – Electrically propelled road vehicles—Safety specifications Part 3: Protection of persons against electric shock

AS ISO 6469.3:2014 pdf free download – Electrically propelled road vehicles—Safety specifications Part 3: Protection of persons against electric shock.
3.26
rechargeable energy storage system
RESS
system that stores energy for delivery of electric energy and that is rechargeable
EXAMPLES Batteries, capacitors.
3.27
reinforced insulation
insulation of live parts (3.22) for protection against electric shock (3.13) equivalent to double InsulatIon (3.11)
NOTE Reinforced insulation does not imply that the insulation shall be a homogeneous piece. The reinforced insulation may be composed of several layers that cannot be tested individually as supplementary or basic insulation.
3.28
supplementary Insulation
independent insulation applied in addition to basic insulation (3.4) for protection against electric shock (3.13) in the event of a failure of the basic insulation (3.4)
3.29
traction battery
collection of all battery packs (3.6) that are electrically connected, for the supply of electric power to the electric drive (3.15) and to the conductively connected auxiliary electric system, if any
3.30
voltage class A
classification of an electric component or circuit with a maximum working voltage of less than 30 V a,c. (rms) or 6OVd.c.
NOTE For more details see Clause 5.
3.31
voltage class B
classification of an electric component or circuit with a maximum working voltage between 30 V a.c. (mis) and
1 000 V a.c. (mis) or between 60 V d.c. and 1 500 V d.c.
4 Environmental and operational conditions
The requirements given in this part of ISO 6469 shall be met across the range of environmental and operational conditions for which the electrically propelled vehicle is designed to operate, as specified by the vehicle manufacturer.
NOTE See ISO 16750 for guidance.
5 Voltage classes
Depending on its maximum working voltage, U, an electric component or circuit belongs to one of the voltage classes specified in Table 1.
7.3.3.3 For a.c. body currents caused by such capacitive couplings when touching a.c. class B voltage one of the following options shall be fulfilled:
a.c. body current shaH not exceed 5 mA when measured in accordance with IEC 60950-1:
— alternative mechanical or electrical measures for a.c. voltage class B electric circuits: see 7.3.3.4.
7.3.3.4 Alternative electrical or mechanical measures include the following:
double or reinforced insulation instead of basic insulation:
— one or more layers of insulation, barriers and/or enclosures in addition to the basic protection:
rigid barriers/enclosures with sufficient mechanical robustness and durability, over the vehicle service life.
7.3.4 De-energization
The voltage class B electric circuit in question may be de-energized as a protection measure. The monitoring of faults within the circuit or the detection of events may be used to trigger the de-energization. One of the following conditions shall be met for the de-energized circuit.
— The voltage shall be reduced to less than 30 V a.c. (rms) for a.c. circuits and 60 V d.c. for d.c. circuits.
— The total stored energy of the circuit shall be <0,2 J. The transition time to reach the de-energized state shall be specified by the manufacturer in accordance with expected failures and operating conditions. 7.4 Alternative approach for protection against electric shock As an alternative to 7.3, the vehicle manufacturer shall conduct an appropriate hazard analysis and establish a set of measures which give sufficient protection against electric shock under single-failure conditions. 7.5 Requirements for insulation If protection is provided by insulation, the live parts of the electric system shall be totally encapsulated by insulation that can be removed only by destruction. The insulating material shall be suitable to the maximum working voltage and temperature ratings of the vehicle and its systems (see also Clause 4). The insulation shall have sufficient capability to withstand the usual voltage. Compliance shall be tested in accordance with 8.3. 7.6 Requirements for barriers/enclosures 7.6.1 General If protection is provided by barriers/enclosures, live parts shall be placed inside enclosures or behind barriers, preventing access to the live parts from any usual direction of access. The barriers/enclosures shall provide sufficient mechanical resistance under normal operating conditions, as specified by the manufacturer. If barriers/enclosures are accessible directly, they shall be opened or removed only by use of tools or maintenance keys or they shall have means to deactivate live parts with class B voltage, e.g. an interlock. See 6.1 for marking of barriers/enclosures.