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Cruise ship shore power

Cruise ship shore power

Cruise ship shore power

(OP)
I have seen shore power facilities for cruise ships and they typically provide 4 or so cables at 6.6 or 11 kV, and a neutral cable. How is that neutral tied into the ships switchboards? Are they running 6.6 kV with a neutral bus?

RE: Cruise ship shore power

If you are using any wye/wye transformer banks you need a primary neutral.

Bill
--------------------
"Why not the best?"
Jimmy Carter

RE: Cruise ship shore power

(OP)
Right, but that is what I am asking. Do they have that arrangement? None of  the ships I have worked don have a neutral on the HV bus. Maybe an HRG or reference for earth fault protection?

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