Abb; Trip Unit; Voltage Rating: 600 Vac; Amperage Rating: 400 Amp; Frequency Rating: 50 - 60 Hz; Frame: 400 Amp; Trip Type: Ls/i (ac Only), Pr221, Electronic; Interrupt Rating: 100 Kamp At 480 Vac; Number Of Poles: 3; Length: 5.510 In; Width: 470 In; Height: 870 In; Mechanical Life: 20000 Operations; Weight: 8.550 Lb;interrupting Rating Class/breaking Capacity: Extra High; T5l400bw: Bkr T5l 400a3p Ls/i Ul Lvp; T5l400bw: Bkr T5l 400a 3p Ls/i Ul Lvp