UFC 3-560-01
6 December 2006
Including change 1, 7 December 2006
13-2
SHIP'S MAIN ELECTRICAL SERVICE COMPONENTS. The specific safety
requirements given apply to the cable assemblies from the pier's electrical outlet
assemblies (commonly called "turtlebacks" on Mil-C receptacle systems, and
"Connection Stations" on single pole panel mount connector systems) to the ship's
electrical bus. There are other components of the shore's high-voltage electrical
distribution system used to supply substations that in turn supply the pier electrical
outlet assemblies. The safety requirements for the pier electrical outlet assemblies that
supply line side components are covered by earlier sections. Because they are
provided for ships power in addition to permanent pier electrical loads, these
components are also described here to enable a clearer understanding of the dockside
electrical distribution system.
13-2.1
Shore High-Voltage Distribution System. The facility's primary electrical
distribution system normally operates in the high-voltage range between 5 kV and 35
kV. For permanent pier service, dual primary feeders from the shore's primary system
is preferred. Pier systems can also be furnished with single feeders. These feeders
serve substations, which step down the distribution system's primary voltage to the
required secondary voltage for ships electrical service of 13.2 kV, 4.16 kV or 480 volts.
13-2.2
Pier Substations. Substations might consist of above ground installed on
the top of a pier or units installed in vaults located under the pier. Vault substations are
fed by shielded power cables installed in electrical duct. Above deck substations are
skid-mounted and are supplied by either shielded power cables installed in duct or mine
power cable installed on the pier connected to the electrical distribution system via
cable coupler plugs to coupler receptacles in electrical connection outlet assemblies.
Both types of substations may include one or more primary fused switches or be fed
from a pad mount switchgear vacuum fault interrupter switch way, the step-down
transformer, and secondary circuit breakers supplying the pier electrical outlet
assemblies for ship-to-shore power cables. Figures 13-1 through 13-6 show these
component elements.
13-2
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