Schneider Electric LUCL18B TeSys U Standard Control Unit 4.5-18 A 24 V AC Motor Starter Module

The Schneider Electric LUCL18B is a TeSys U magnetic control unit that inserts into the LUB32 and LUB38 power base to form a complete starter-controller for 3-phase motors up to 7.5 kW at 400-440 V AC. It gives adjustable short-circuit protection over a 4.5-18 A rated current range at an overcurrent threshold of 14.2 x Ir, and is powered from a 24 V AC control circuit.

Technical Specifications

Certifications & Standards

• CE
• EAC
• ATEX
• EN 60947-6-2
• IEC 60947-6-2
• UL 60947-4-1
• CSA C22.2 No 60947-4-1

Selection Notes

Pick the LUCL18B by matching its 4.5-18 A adjustment range to the full-load current of the motor, not the motor's nameplate power alone, since the dial sets the short-circuit trip point rather than an overload curve. The 24 V AC control circuit voltage must match the coil supply available at the starter; overload protection itself is supplied separately by the drive or soft starter the unit is paired with, since this control module only provides short-circuit protection and manual reset.