The ABB OT400U03 is a 3-pole, front-operated, base-mounted non-fusible disconnect switch designed for motor disconnects and industrial control panel disconnects. It offers enhanced safety with finger-proof, dead front construction and terminal shrouds to reduce the risk of touching live parts. The modular design allows for flexible installation with either top or bottom incoming power feed. For added security, the handle and shaft provide a door interlock, preventing the door from being opened when the switch is in the 'ON' position, and the handles can be padlocked in the 'OFF' position. This switch ensures superior short circuit protection with a quick make, quick brake mechanism and clear position indication, while fuses are isolated in the 'OFF' position for user safety. Constructed with excellent track-resistant material, it minimizes flashover risk even in severe conditions..This is a 3-pole, non-fusible, front-operated, base-mounted switch-disconnector with a rated operational voltage of 1000 VAC (Main Circuit) and a rated insulation voltage (Ui) of 1000 volt acc. to IEC/EN 60664-1. It has a rated impulse withstand voltage (Uimp) of 12 kilovolt and a rated short-time withstand current (Icw) of 15 kiloampere for 1 second. The switch has an amperage rating of 400 A and a horsepower rating of 350 hp. Its dimensions are 221 mm H x 220 mm W x 85 mm D. It complies with standards IEC 60947-3, UL 98, and CSA C22.2 NO.4. The terminal type is Lug.