The 690+ voltage rating is 220-240VAC (±10%) single or three phase or 380-460VAC (±10%) three phase.
This means the 220-240Vac model trips at 198Vac for Undervoltage. And 264Vac for Overvoltage.
This means the 380-460Vac model trips at 342Vac for Undervoltage. And 506Vac for Overvoltage.
For more information follow this QuickLink to the manual for the 690+ on Parker.com - (Manual, QuickStarts, Product Support, etc)