When operating heavy-duty 3-phase motors above 5 HP, launching them directly-on-line (DOL) causes a massive initial current spike. This sudden load can cause severe voltage drops across your facility, trigger main breakers, and place intense mechanical stress on your motor's internal windings. The Bentex Star Delta Oil Immersed Starter solves this problem safely and efficiently. By first starting the motor in a low-voltage “Star” configuration to restrict the initial rush current, and then switching to the full-voltage “Delta” run configuration once the motor gains speed, it provides seamless, safe acceleration for high-horsepower machinery. Primary Applications: 7.5 HP to 15 HP - Medium Atta Chakkis (Flour Mills), Oil Expellers, Monoblock Pumps, 15 HP to 25 HP+ Large Submersible Borewell Pumps, Heavy Air Compressors, Stone Crushers.