SAC320 tunnel thruster Ø300mm 400V, vertical (SAC320/300-I-4-V)

The SAC320 tunnel thruster Ø300mm 400V is a Sleipner AC electric tunnel thruster rated at 320kg of thrust, for use as a bow or stern thruster on boats of 55-100 ft / 17-31 m. It is designed for vertical mounting and for continuous operation without downtime, making it suited to heavy-use commercial and industrial vessels.

Scope of supply

Delivered as a complete ready-to-install kit for connection to the Sleipner S-Link™ control system, configured for the specific vessel with no further VFD setup required:

• PDC-301 drive controller (Modbus link to the VFD, real-time data logging and fault history, firmware upgrades via S-Link™)
• Variable frequency drive (VFD)
• Gearleg with propellers and bracket
• Flexible coupling
• AC motor
• EMC filter

Key features

• Twin counter-rotating propellers for maximum thrust in a minimal tunnel diameter
• Q-PROP™ five-bladed skew propeller: noise reductions of up to 75% measured in controlled environments, 20-40% expected in average installations
• PRO™ variable speed control with hold-function; in a dual bow/stern system one button press holds the vessel alongside the dock
• S-Link™ CAN-based control system with waterproof, keyed and colour-coded plug connectors; monitors thruster condition and gives continuous operator feedback; can combine AC and hydraulic thrusters on one control cable
• Flexible installation at any angle on the tunnel
• Flexible coupling compensating for minor misalignment between motor and gearleg shafts
• Sealed drive lubrication: gearleg pre-filled for lifetime lubrication, sealed with a ceramic/carbon mechanical seal
• Galvanic separation of immersed parts from the onboard electrical system to eliminate stray currents

Technical data

• Item code: SAC320/300-I-4-V
• Power supply: 400V AC (supply range 380-440V 3-phase)
• Power output at nominal voltage: 21kW / 28.2hp
• Intermittent thrust (nominal): 320kg / 705lbs
• Continuous thrust (nominal): 280kg / 617lbs
• Tunnel internal diameter: 300mm / 11.81in
• Height x length x width: 703mm / 27.68in x 347mm / 13.66in x 262mm / 10.31in
• Minimum water depth: 450mm / 17.72in
• Tunnel length: min. 300mm / 11.81in, recommended 550mm / 21.65in
• Tunnel wall thickness: 10mm / 0.39in to 15mm / 0.59in
• Net weight: 71kg / 156.53lbs

Options

• Low harmonic VFD option reduces total harmonic distortion to less than 5%, helping keep the electrical network clean, prevent interference with other equipment and communications, and reduce the need for generator oversizing
• Standard range built for 230V or 400V; other specifications available on request

Applications

Commercial vessels, motor boats and sailing boats of 17-31m / 56-102ft.