Portfolio: Seattle Princess Cruise Lines Terminal 30 Shore Power System

Cochran was contracted to design and install the first commercial shore power system in the continental United States by Princess Cruise Lines in late 2004. The design and installation consisted of the following: The Primary Switchgear is fed by Seattle City Light at 27.5kV. The Primary Switchgear includes metering equipment and relay protection devices that ensure the safety of the systems and the grid. Power is then fed to the Transformer and from the Transformer to the Secondary Switchgear, which is capable of delivering 6,600 or 11,000 volts of power as needed depending on the class of ship in port. Power from the Secondary Switchgear is fed to a Ground Switch that is connected to the Ship Power Cables that deliver the power to the ship. A jib was installed on the pier to hold the Ship Power Cables and helps position them for connection.

This project was taken from preliminary design through completion in under 6 months. The environmental impact of the project, the Port of Seattle’s willingness to work with the Cruise Lines and Cochran, and Cochran’s engineering abilities made this extremely condensed schedule possible.