Document ID: chunk:federal_register_of_legislation:F2025L00028:front:0:p15
Version: federal_register_of_legislation:F2025L00028
Segment Type: other
Provision Reference: 
Character Range: 42886–45882

parts, the protection degree IPXXB shall be provided.

              The assessment shall be conducted in accordance with paragraph 4 of Annex 9.

              In addition, for protection against electrical shock which could arise from  indirect contact, the resistance between all exposed conductive parts of electrical protection barriers/enclosures and the electrical chassis shall be lower than 0.1 Ω and the resistance between any two simultaneously reachable exposed conductive parts of electrical protection barriers/enclosures that are less than 2.5 m from each other shall be less than 0.2 Ω when there is current flow of at least 0.2 A. This resistance may be calculated using the separately measured resistances of the relevant parts of electric path.

              These requirements are satisfied if the galvanic connection has been made by welding. In case of doubt or the connection is established by mean other than welding, measurements shall be made by using one of the test procedures described in paragraph 4 of Annex 9.

              5.3.7.1.4. Isolation resistance

              The criteria specified in the paragraphs 5.3.7.1.4.1. and 5.3.7.1.4.2. below shall be met.

              The measurement shall be conducted in accordance with paragraph 5. of Annex 9.

       5.3.7.1.4.1. Electrical power train consisting of separate DC- or AC-buses.

              If the AC high voltage buses and the DC high voltage buses are galvanically isolated from each other, isolation resistance between the high voltage bus and the electrical chassis (Ri, as defined in paragraph 5. of Annex 9) shall have a minimum value of 100 Ω/V of the working voltage for DC buses, and a minimum value of 500 Ω/V of the working voltage for AC buses.

       5.3.7.1.4.2. Electric power train consisting of combined DC- and AC-buses

              If the AC high voltage buses and the DC high voltage buses are conductively connected, they shall meet one of the following requirements:

                  (a) Isolation resistance between the high voltage bus and the electrical chassis shall have a minimum value of 500 Ω/V of the working voltage;

                  (b) Isolation resistance between the high voltage bus and the electrical chassis shall have a minimum value of 100 Ω/V of the working voltage and the AC bus meets the physical protection as described in paragraph 5.3.7.1.3;

              (c) Isolation resistance between the high voltage bus and the electrical chassis shall have a minimum value of 100 Ω/V of the working voltage and the AC bus meets the absence of high voltage as described in paragraph 5.3.7.1.1.

              5.3.7.2. Electrolyte leakage

              5.3.7.2.1.  In case of aqueous electrolyte REESS.

              For a period from the impact until 60 minutes after the impact, there shall be no electrolyte leakage from the REESS into the passenger compartment and no more than 7 per cent by volume of the REESS electrolyte with a maximum of 5.0 l