SAC520 tunnel thruster Ø386mm 230V

The SAC520 tunnel thruster Ø386mm 230V is a Sleipner AC electric tunnel thruster rated at 520kg of thrust, for use as a bow or stern thruster on boats of 85-140 ft / 25-40 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
• Gravity feed lubrication: gearleg supplied with oil from a separate reservoir above the waterline for oil-level monitoring

Technical data

• Item code: SAC520/386-C-2-V
• Power supply: 230V AC (supply range 208-240V 3-phase)
• Power output at nominal voltage: 35kW / 46.9hp
• Continuous thrust (nominal): 520kg / 1146lbs
• Tunnel internal diameter: 386mm / 15.20in
• Height x length x width: 999mm / 39.33in x 439mm / 17.28in x 356mm / 14.02in
• Minimum water depth: 580mm / 22.83in
• Tunnel length: min. 500mm / 19.69in, recommended 750mm / 29.53in
• Tunnel wall thickness: 10mm / 0.39in to 15mm / 0.59in
• Net weight: 189kg / 416.67lbs
• DNV type approval certificate (tunnel thruster) available

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 25-40m / 82-131ft.