three phase; 400 hz operating frequency; 102/124 voltage sense band; 370/430 frequency sense band; 2 seconds drop-out time delay; 2 seconds pick-up time delay; 115 volts operation; four 0.219 inch dia mtg holes; 7.438" lg; 5.375" w; m 10 to p 70 deg c operating temperature; cast aluminum enclosure