Products / LT Panels / Motor Control Centers / DOL / Star-Delta Starter Panel
DOL / Star-Delta Starter Panel
Direct-On-Line and Star-Delta motor starters — simple full-voltage or reduced-current starting.
DOL (Direct-On-Line) and Star-Delta are motor starter panel types: DOL offers simple, full-voltage starting for small motors (high current/torque), while Star-Delta uses a two-step process (Star for reduced current/torque, then Delta for full power) for larger motors to limit inrush current, reducing stress but adding complexity and cost.
DOL Starter Panel
- Connects the motor directly to full supply voltage using a main contactor, overload relay and stop/start buttons
- Simple and cheap, with high starting torque (100%)
- High starting current (6–8x full-load current)
- Best for small motors (<5HP/7.5kW) needing high initial torque
Star-Delta (Δ-Y) Starter Panel
- Starts in Star for reduced voltage (58%) and current (1/3), then switches to Delta for full operation
- Uses three contactors, a timer and an overload relay
- Reduced starting current (2–3x FL current), smoother start, less mechanical stress
- Best for medium to large motors (>5HP/7.5kW) where current draw must be limited
Both types offer overload and phase-loss protection, with auto/manual modes and remote control options.
- Available Features
- Conforming to IEC/EN 60947-1 and IEC/EN 60947-4-1
- Ingress protection up to IP65
- Thermal overload and phase-loss protection built in
- Auto/manual operation with remote control option
- Wall mounting or floor standing
