Hello everyone! We recently picked up a Cutler-Hammer 1600 Amp Combination Bypass Isolation and Automatic Transfer Switch catalog number BIVISPF41600XSU. This unit includes 4 1600 Amp SPB 100M's catalog number SPBMR416C, with Digitrip RMS510 trip units catalog number S51LI, and RP6S16A160 rating plugs. Unit Rated at 1600 amps, 3 phase, 4 pole, 4 wire,60 Hz, 480 volt. If interested please contact our sales department at Toll Free: (800) 497-6255 x1 and tell them you saw it here! Thanks for looking and make it a Great Day!