The Open Star Delta Starter Type 1 is a DIN rail-mounted motor starter designed for soft-starting three-phase induction motors up to 18.5 kW. It combines main and control wiring in a compact open-frame design with integrated overload protection (MCE2-25), making it ideal for industrial plant installations, pump systems, and fan drives. Widely used by electricians and facilities managers for reliable motor control in manufacturing and HVAC applications.