The Schneider Electric TeSys U control and diagnostic unit to be inserted in advanced power bases LUB320, LUB380 to form a TeSys U starter controller, for 1-phase motor applications up to 4kW@400V. It provides full protection to motors with a rated current Ir 45-18A (Ir adjustable), overload tripping class 10, short circuit at 13 x Irmax, overcurrent at 142 x Ir, phase loss, insulation fault (protection of equipment only)