Telemecanique LUB12 Power Base TESYS U 12A Control

TeSys U LUB12 is a standard 3-pole power base for TeSys U motor starters, delivering a nominal 12 A current at up to 690 V to form the power side of a complete TeSys U starter. It uses screw-terminal (clamp) connections and is designed to be paired with a LUC control unit to create a full motor-starter controller suited for three-phase motors. The base features a modular, plug-and-play construction that simplifies maintenance and system upgrades, and it provides three normally open contacts (3NO) as the primary switching path. In typical three-phase applications, the LUB12 base supports motor loads up to several kilowatts depending on supply voltage (for example, commonly cited configurations place it around 5.5 kW at 400 V when paired with the appropriate control unit). The TeSys U family emphasizes integrated motor management and direct access to device-level information for each starter, aiding commissioning and diagnostics. For applications requiring reversing rotation, a reversing block assembly can be added to higher-numbered power bases (LUB120–LUB380) to enable two-direction control when combined with the appropriate control configuration. In practice, LUB12 serves as the compact, high-availability power base in a TeSys U starter, ready to be completed with a corresponding LUC control module to meet specific motor voltages, currents, and duty cycles in industrial drives. It is commonly used in conveyors, pumps, fans, and other general-purpose three-phase motor control tasks where a robust, modular TeSys U solution is preferred.