4.1 Power Failures

There are three sources of power to the Seakeeper 6:

• 12 VDC powers the Seakeeper for all the control electronics.
• 12 VDC powers the DC Seawater Pump for cooling water supply.
• 110 – 230 VAC powers the Motor Drive Box to drive the motor inside the Seakeeper.

These are supplied on Cables 1, 8, and 2 (respectively) which are shown on Drawing No. 90396 – Seakeeper 6 Cable Block Diagram.

The Motor Drive Box contains hazardous voltage and the cover should not be removed while the flywheel is spinning and the AC input has been disconnected for at least 10 minutes. This high voltage exists even if the flywheel is coasting down and the supply voltage has been shut off.