I don't know if I'd count on that without more information.
It could mean 208 vs. 240 volts, or even 110 vs. 120. I've
actually seen the terms "high line" and "low line" used
more frequently in that context than 120/240.

Tony wrote:
From what you've posted, Hi-voltage usually refers to 220, and low voltage
refers to 110 (when it comes to AC motors).