The Apex catalogue positions Star-Delta starters for heavy-duty applications where direct-on-line starting is not preferred because of higher current demand. In star position the motor starts at lower voltage, then transitions to delta for normal full-voltage running.
Star Delta Starters
Reduced-current starting for heavier-duty motor applications.
Apex Star-Delta Starters are used where starting current must be reduced, allowing the motor to begin in star and then transition to delta once it approaches rated speed.
- Manual and automatic versions
- Reduced starting current
- Suitable for higher motor ratings
- Powder-coated IP54 enclosure
- High-quality contact materials and machine-wound coils
Star-delta selection is often preferred where inrush management, utility stability, and mechanical stress reduction are key design requirements in industrial motor systems.
Manual Star-Delta Starter
Uses a direct operator handle to move from star to delta, giving straightforward manual control in applications where robust, accessible operation is preferred.
The catalogue text mentions manual range up to 35 HP, while the selection table includes higher model references as well.
Automatic Star-Delta Starter
Automates the star-to-delta transition through a timing relay, making it suitable for applications needing reduced starting current with less operator involvement.
Selection references in the catalogue extend to larger motor outputs, including models shown up to 45 HP.
Explore Related Industrial Switchgear
Compare with Direct Online Startersfor simpler ON-OFF starting, or review Forward-Reverse Starter optionswhere bidirectional operation is required. For operator switching points, see our ON-OFF and Changeover Control Switch range.