»Seihav« got an electric propulsion system by Stadt AS. Photo: Stadt AS
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The new »Seihav« has now gone on chart with the Norwegian salmon farming company Lerøy Seafood Group. Stadt AS, a Norwegian company in electric propulsion, was granted the contract by the shipyard Fitjar Mekaniske Verkstad.

The vessel is able to carry 4,000 m³ of live salmon in [ds_preview]the tanks over long distances. According to Stadt AS a reliable and environmentally sustainable propulsion arrangement has been chosen for »Seihav«. This ship which is one of the largest of its kind in the world.

The diesel-electric system in this ship is highly reliable, and based upon the Stadt NO-Loss AC drives of 3,000 kW, controlling two independent electric motors in to a single screw CPP propeller arrangement via the common gearbox. The electric drives have triple redundancy, and fulfill the latest regulations from DNV-GL for ships with single screw electric propulsion. All power for the entire ship comes from three equal CAT C280-6 diesel generator sets, each 1,825 kW, 900 rpm, 690 V 60 Hz.

The ship can operate with one, two or three of these generator sets engaged. All the electric power that is generated by the CATs are fed in to the Stadt main switchboard and PMS system, that can distribute the power out to any consumers on the ship, including the 3 MW electric propulsion. A complete breakdown of two out of tree generator sets, will not jeopardize the safe operation of the ship. Besides the powerful main propellers and two tunnel thrusters 700 kW each, this ship has a lot of electrically operated pumps and processing equipment that circulates the seawater where the salmon is kept.