What does the instruction manual have to say on the subject? If you don't have the manual, or the desire to understand it, you probably have no business messing with the settings.
The manual is available at geindustrial.com in pdf format. You need the section on "protection". Be sure you understand it and the intent of the existing settings thoroughly before making changes.
The manual is ~500 pages, but the section you need to read and comprehend is only 8 pages. There are undervoltage (bus or line) and delay (inverse or definite) options mentioned in there and the delay is easy to set once you have read section 12.7.
