Document ID: chunk:federal_register_of_legislation:F2023L01529:body:0:p16
Version: federal_register_of_legislation:F2023L01529
Segment Type: other
Provision Reference: 
Character Range: 44818–47831

the minimum required value. The isolation resistance between the high voltage bus of the coupling system for charging the REESS, which is not energized besides during charging the REESS, and the electrical chassis need not be monitored. The function of the on-board isolation resistance monitoring system shall be confirmed as described in Annex 5.
         5.1.3.4. Isolation resistance requirement for the coupling system for charging the REESS
         For the vehicle inlet intended to be conductively connected to the grounded external AC power supply and the electrical circuit that is galvanically connected to the vehicle inlet during charging of the REESS, the isolation resistance between the high voltage bus and the electrical chassis shall be at least 1 MΩ when the charger coupler is disconnected. During the measurement, the traction battery may be disconnected.
         5.2. Rechargeable Electrical Energy Storage System (REESS)
         5.2.1. For a vehicle with a REESS, the requirement of either paragraph 5.2.1.1. or paragraph 5.2.1.2. shall be satisfied.
         5.2.1.1. For a REESS which has been type approved in accordance with Part II of this Regulation, it shall be installed in accordance with the instructions provided by the manufacturer of the REESS, and  in conformity with the description provided in Part 2 of Annex 6 to this Regulation.
         5.2.1.2. The REESS shall comply with the respective requirements of paragraph 6. of this Regulation.
         5.2.2. Accumulation of gas
         Places for containing open type traction batteries that may produce hydrogen gas shall be provided with a ventilation fan or a ventilation duct to prevent the accumulation of hydrogen gas.
         5.3. Functional safety
         At least a momentary indication shall be given to the driver when the vehicle is in "active driving possible mode''.
         However, this provision does not apply under conditions where an internal combustion engine provides directly or indirectly the vehicle´s propulsion power.
         When leaving the vehicle, the driver shall be informed by a signal (e.g. optical or audible signal) if the vehicle is still in the active driving possible mode.
         If the on-board REESS can be externally charged by the user, vehicle movement by its own propulsion system shall be impossible as long as the connector of the external electric power supply is physically connected to the vehicle inlet.
         This requirement shall be demonstrated by using the connector specified by the car manufacturer.
         The state of the drive direction control unit shall be identified to the driver.
         5.4. Determination of hydrogen emissions
         5.4.1. This test shall be carried out on all vehicles equipped with open type traction batteries. If the REESS has been approved under Part II of this Regulation and installed in accordance with paragraph 5.2.1.1. this test can be omitted for the approval of the vehicle.
         5.4.2. The test shall