Document ID: chunk:federal_register_of_legislation:F2025L00028:front:0:p14
Version: federal_register_of_legislation:F2025L00028
Segment Type: other
Provision Reference: 
Character Range: 40143–43187

taken into account in evaluating the continuous leakage.

              5.3.7. Following the test conducted in accordance with the procedure defined in Annex 4 to this Regulation, the electric power train operating on high voltage, and the high voltage systems which are galvanically connected to the high voltage bus of the electric power train, shall meet the following requirements:

              5.3.7.1. Protection against electrical shock

              After the impact, the high voltage buses shall meet at least one of the four criteria specified in paragraph 5.3.7.1.1. through paragraph 5.3.7.1.4.2.

              If the vehicle has an automatic disconnect function, or device(s) that conductively divide the electric power train circuit during driving condition, at least one of the following criteria shall apply to the disconnected circuit or to each divided circuit individually after the disconnect function is activated.

              However, criteria defined in 5.3.7.1.4. shall not apply if more than a single potential of a part of the high voltage bus is not protected under the conditions of protection degree IPXXB.

              In the case that the crash test is performed under the condition that part(s) of the high voltage system are not energized and with the exception of any coupling system for charging the REESS which is not energized during driving condition, the protection against electrical shock shall be proved by either paragraphs 5.3.7.1.3. or 5.3.7.1.4. below for the relevant part(s).

              5.3.7.1.1. Absence of high voltage

              The voltages Ub, U1 and U2 of the high voltage buses shall be equal or less than 30 VAC or 60 VDC within 60 s after the impact when measured in accordance with paragraph 2. of Annex 9.

              5.3.7.1.2. Low electrical energy

              The total energy (TE) on the high voltage buses shall be less than 0.2 joules when measured according to the test procedure as specified in paragraph 3. of Annex 9 with the formula (a). Alternatively, the total energy (TE) may be calculated by the measured voltage Ub of the high voltage bus and the capacitance of the X-capacitors (Cx) specified by the manufacturer according to formula (b) of paragraph 3. of Annex 9.

               The energy stored in the Y-capacitors (TEy1, TEy2) shall also be less than 0.2 joules. This shall be calculated by measuring the voltages U1 and U2 of the high voltage buses and the electrical chassis, and the capacitance of the
              Y-capacitors specified by the manufacturer according to formula (c) of paragraph 3. of Annex 9.

              5.3.7.1.3. Physical protection

              For protection against direct contact with high voltage live 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