What specific engineering hurdle did the transition to higher-voltage AC power transmission introduce regarding circuit interruption?

Answer

The electric arc could sustain current across the gap even after the fuse link vaporized

High-voltage circuits created an intense electrical energy that could sustain an arc across the gap created by the melting link, continuing to pass dangerous current even after the fuse was blown.

What specific engineering hurdle did the transition to higher-voltage AC power transmission introduce regarding circuit interruption?
inventionSafetyfuse