YDSW15400 Lovato star delta starter with isolator 400V 15KW 20HP 28Amp

Why Choose the Lovato YDSW15400 Star-Delta Starter with Isolator?

The Lovato YDSW15400 is a high-performance star-delta motor starter with integrated isolator designed for reduced-current starting of three-phase induction motors in demanding industrial and commercial environments. Manufactured by Lovato Electric, this enclosed starter combines reliable motor control with safe local isolation functionality for enhanced operational safety and maintenance convenience.

The star-delta starting method initially connects the motor windings in a star configuration to reduce startup current and torque before automatically switching to delta operation for full running conditions. This controlled startup process helps minimise voltage dips, reduce mechanical stress and extend the service life of motors and connected equipment.

With a rated motor power of 15 kW, a 28 A AC3 operational current rating and a 400 V AC control voltage, the Lovato YDSW15400 is ideal for pumps, compressors, conveyors, fans and industrial process machinery requiring dependable reduced-current motor starting with integrated local isolation.

Key Advantages

• Reliable star-delta starter with integrated rotary isolator.
• 15 kW motor rating suitable for industrial machinery.
• 28 A AC3 operational current capability.
• Reduces motor starting current and mechanical stress.
• 400 V AC control voltage for industrial control systems.
• IP65 insulated enclosure suitable for harsh environments.
• Compatible with RF38 thermal overload relays for motor protection.

Key Features

• Lovato L-Starter YDSW series.
• 15 kW rated motor power.
• 28 A maximum AC3 current.
• 400 V AC control voltage.
• Automatic star-delta transition for controlled motor startup.
• Integrated rotary isolator for local disconnection.
• Heavy-duty insulated polycarbonate enclosure.
• Designed for use with RF38 overload relays.

Technical Specifications

• Manufacturer: Lovato Electric
• Series: L-Starter YDSW Series
• Model: YDSW15400
• Product type: Star-delta starter with isolator
• Rated motor power: 15 kW
• Horsepower rating: 20 HP
• Maximum AC3 current: 28 A
• Control voltage: 400 V AC
• Input phases: 3-phase
• Protection rating: IP65 enclosure
• Enclosure material: Insulated polycarbonate
• Mounting type: Surface mounting
• Dimensions (H × W × D): approx. 220 × 280 × 170 mm
• Overload relay compatibility: RF38 series
• Starting method: Automatic star-delta transition
• Compliance: IEC/EN 60947-1, IEC/EN 60947-4-1

Efficient Reduced-Current Motor Starting with Isolation

Star-delta starters are widely used for larger three-phase motors where reducing startup current is important for maintaining electrical system stability and protecting connected equipment. By initially connecting the motor in star configuration, the starter lowers current draw before automatically switching to delta operation for full-load running.

The integrated rotary isolator fitted to the Lovato YDSW15400 enables safe local disconnection during maintenance and servicing procedures. This combination of star-delta starting and isolation functionality makes the starter particularly suitable for industrial automation systems requiring both operational reliability and maintenance safety.

Typical Applications

• Industrial pumps and booster systems.
• Compressors and refrigeration equipment.
• Conveyor and material handling systems.
• Ventilation and extraction equipment.
• Water treatment and agricultural systems.
• General industrial machinery and automation systems.

Trusted by Industrial Engineers Worldwide

Lovato star-delta starters with integrated isolators are widely trusted by OEM machine builders, panel manufacturers and industrial maintenance engineers for reliable reduced-current motor starting and dependable long-term industrial performance.