Sea Jewel is a 160 ft (49 m) yacht that uses two Caterpillar 3304 gensets for electric

power. The ship’s original control system needed repair but had been discontinued;

additionally Lloyd’s registration was required to comply with new insurance

guidelines. So Sea Jewel Ltd contacted Governor Control Systems Inc. (GCS) to

purchase, install, and commission two Woodward EGCP‐3 LS units to control these

two Cat gensets. The EGCP‐3 LS combines engine, generator, power system,

switchgear, bus and generator monitoring, protection, and control functions in a

single, compact, and cost‐effective package. Woodward representatives were

present to help in the commissioning.

Electrical System

The Sea Jewel’s two Cat 3304 gensets are rated for 80 kW each. Each genset is

controlled by a Woodward EGCP‐3 LS and can connect to the ship electrical load via

its generator breaker. The load can also be supplied by shore power when in port.

To synchronize the boat to shore power, a Woodward SPM‐D delivers

synchronization signals to the two EGCP‐3 LS units and closes the breaker when

phase and frequency are matched.