- ASC 2024 Regs – Revision C (Published 18 November 2023)
- ASC 2024 Regs – Revision B (Published 8 October 2022)
- ASC 2024 Regs – Revision A (Published 6 December 2021)
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8.6.A.4 Main Power Switch:
Clarified the required positions for the high voltage battery pack isolation relays in the circuit and removed redundant wording regarding the Safe State definition since the safe state definition is covered in 8.3.A.9. The main fuse on the positive side of the battery pack is the only component that is allowed to be electrically connected before the isolation relays. The updated wording for this regulation is posted below and this will be reflected in any future regulation revisions.
In the off position, the main power switch must isolate the high voltage battery, motor, and array from each other and put the solar car in the ‘Safe State’. The high voltage battery pack isolation relays must be electrically located first in series after the battery negative terminal and second in series after the battery positive terminal with only the main fuse connected before it.
8.3.A.9 Safe State:
Clarified the definition of Safe State to isolate all external loads on the high voltage battery pack, not just current paths exiting the battery pack. It is not acceptable to power anything off the main high voltage battery pack while in safe state. The updated wording for this regulation is posted below and this will be reflected in any future regulation revisions.
A stable electric shut down condition where the high voltage battery pack is completely isolated from external current loads and all high voltage conductors exiting the battery enclosure are electrically disconnected.