4.2 Power Failures

The Motor Connections should not be touched when the Seakeeper is Powered on, or the motor is running. This voltage hazard exists even if the flywheel is coasting down, and the supply voltage has been shut off.

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The flywheel must be at Zero (0) RPM and DC input power disconnected for at least 10 minutes prior to any service work on the Seakeeper.

In the event of a power failure, the brake automatically locks the Seakeeper so it cannot generate anti-rolling torque loads. When a power failure occurs, it is important to identify the three sources of power to the Seakeeper 4:

• 12 VDC high current powers the Motor Drive.
• 12 VDC low current powers the Seakeeper control electronics, ConnectBox, and optional 5″ Touch Display.
• SW Pump 12 VDC input powers the seawater cooling pump.

Power is supplied via cables which are shown on Drawing No. 90699 – Seakeeper 4 / 4.5 Cable Block Diagram.