The scenario
A marine vessel main DC panel distributes 120V DC power from an engine-driven alternator and a shore charger to navigation, communication, lighting, and emergency loads through individual circuit breakers.
What is in this drawing
Read the decisions behind it.
01
Use generator node for alternator with 120V DC voltage rating
02
Represent shore charger as generator source labeled AC-DC
03
Include incomer breakers for each source before the main DC bus
04
Assign dedicated breakers and loads for navigation, communication, lighting, and emergency systems
When designing or documenting a marine DC distribution panel with multiple DC sources and protected load circuits, especially for vessels with 120V DC systems.
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