This GV5PB150N is a 150-amp, three-pole motor protection breaker from the TeSys GV5 line, with an electronic MicroLogic 2.2 M trip unit that keeps a close eye on phase loss and overloads. Out here in the grease, you want something that'll clear a fault fast—it's rated 65 kA at 240 V, 35 kA at 480 V, and 18 kA at 600 V. The lugs accept AWG 14 up to 3/0 copper or aluminum, torqued to 44.3 lbf·in (5 N·m). Unit-mount style, so it bolts directly to the panel without extra adapters.
Adjustment and protection
Thermal adjustment spans 58 to 130 A, so you can dial in the motor's full-load amps without swapping breakers. Phase failure sensitivity is built in, which catches a dropped leg before the windings start smoking.