dolsw5.5400 Lovato standard dol starter 5.5kw 12a 230VAC

Why Choose the Lovato DOLSW5.5400 Direct On-Line Starter with Isolator?

The Lovato DOLSW5.5400 is a compact and reliable direct on-line (DOL) motor starter with integrated isolator designed for safe and efficient control of three-phase motors in industrial and commercial applications. Manufactured by Lovato Electric, this enclosed motor starter combines dependable switching performance with integrated local isolation for improved operational safety and simplified maintenance procedures.

Designed for demanding industrial environments, the DOLSW5.5400 features a durable insulated enclosure and high-quality switching components engineered for long-term reliability. Its compact footprint allows easy installation on machinery and industrial equipment where dependable motor starting and protection are required.

With a rated motor power of 5.5 kW, a maximum AC3 operational current of 12 A and a 400 V AC control voltage, the Lovato DOLSW5.5400 is suitable for pumps, compressors, conveyors, fans and general industrial machinery applications requiring reliable direct-on-line motor starting.

Key Advantages

• Reliable DOL starter with integrated rotary isolator.
• 5.5 kW motor rating suitable for industrial motor applications.
• 12 A AC3 operational current capability.
• Heavy-duty Lovato BF series contactor for dependable motor switching.
• IP65 / IP68 insulated enclosure suitable for harsh environments.
• Integrated isolator improves maintenance safety and convenience.
• Compatible with RF25 thermal overload relays for motor protection.

Key Features

• Lovato L-Starter DOLSW series.
• 5.5 kW rated motor power.
• 12 A maximum AC3 current.
• 400 V AC control voltage.
• Integrated start/stop controls and rotary isolator.
• Heavy-duty insulated polycarbonate enclosure.
• Designed for use with RF25 overload relays.
• Suitable for three-phase industrial motor control systems.

Technical Specifications

• Manufacturer: Lovato Electric
• Series: L-Starter DOLSW Series
• Model: DOLSW5.5400
• Product type: Direct-on-line starter with isolator
• Rated motor power: 5.5 kW
• Horsepower rating: 7.5 HP
• Maximum AC3 current: 12 A
• Control voltage: 400 V AC
• Input phases: 3-phase
• Protection rating: IP65 / IP68 enclosure
• Enclosure material: Insulated polycarbonate
• Operating temperature: -25°C to +60°C
• Mounting type: Surface mounting
• Dimensions (H × W × D): approx. 193 × 88 × 134 mm
• Overload relay compatibility: RF25 series
• Compliance: IEC/EN 60947-1, IEC/EN 60947-4-1

Reliable Industrial Motor Starting and Isolation

Direct-on-line starters provide a straightforward and effective solution for starting three-phase induction motors by applying full supply voltage directly to the motor terminals. This method is widely used in industrial applications where reliability, simplicity and strong starting torque are essential.

The integrated isolator fitted to the Lovato DOLSW5.5400 enables safe local disconnection of the motor circuit during servicing and maintenance operations. When paired with a suitable RF25 thermal overload relay, the starter delivers dependable overload protection and long-term operational reliability.

Typical Applications

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

Trusted by Industrial Engineers Worldwide

Lovato enclosed DOL starters are widely trusted by machine builders, panel manufacturers and industrial maintenance engineers for reliable motor starting, safe isolation and dependable long-term industrial performance.