The LUCB05FU is an advanced control unit from the TeSys Ultra range, designed for motor protection and control with manual reset. It mounts via a plug-in front face, occupying a 1.8 in wide × 2.6 in high cutout with a 2.4 in depth – standard TeSys Ultra footprint for panel layouts. Control circuit voltage spans 110–240 V AC and 110–220 V DC, covering common global panel supplies. Typical current consumption is 280 mA during closing and 25–35 mA sealed, depending on the control unit variant. Motor power ratings: 1.5 kW at 400–440 V AC, 2.2 kW at 500 V AC, and 3 kW at 690 V AC, 50/60 Hz. The unit provides protection against overload, short-circuit, earth fault, phase failure, and phase imbalance.
Key ratings and their meaning for fit
Utilisation categories confirm the unit is rated for motor switching with resistive, mixed, and motor loads. Thermal overload class 10 per IEC 60947-6-2 and UL 508 – covers motor starting conditions. Tripping threshold 14.2 × Ir ±20% on short-circuit protection, and immunity to micro-breaks up to 3 ms, ensures ride-through on line dips without false trips. IP20 front panel and wired terminals, IP40 front panel outside connection zone – fine for control cabinet installation with no additional gasketing.
Compliance and certification
Certified to EN 60947-6-2, IEC 60947-6-2, UL 60947-4-1 with phase barrier, and CSA C22.2 No 60947-4-1 with phase barrier. Safe separation of control and auxiliary circuits at 400 V SELV per IEC 60947-1. Fire resistance: 960 °C on parts supporting live components per IEC 60695-2-12, and 650 °C general. Protection treatment TH per IEC 60068 for damp heat.