UFC 4-150-02
12 May 2003
Electrical Power Systems and Equipment (60 Hz), voltage range "A." via low voltage
power circuit breakers. These should be electrically operated, drawout-type units, with
adjustable trip features. Integral current-limiting fuses may be required depending on
the fault current contribution from the substation transformer and the specified short
circuit rating of the breaker. Provide one 600 volts, 800 amp frame circuit breaker for
each individual 500 amp shore power receptacle. Use either 400 A or 600 A sensors
per activity requirement. (Note: OPNAV Inst 111310.3A requires that the overcurrent
setting be 440 A. To provide this setting a 400 A sensor with a 1.1 pickup is needed.
However, prior to specifying this equipment, verify that more than one circuit breaker
manufacturer can provide this setting. The most common combination available is 600
A sensors with .75 or .8 pickups which provide 450 A or 480 A overload settings).
3-8.5.1.2
Breaker Remote Operation. Breakers for ships service must include
remote operation. This can be accomplished either by pushbutton stations which are
integrally mounted in the electrical outlet assemblies, or by local breaker control
switches at the substations. Coordinate with the standard practice of the local activity.
3-8.5.1.3
Space Heaters. Space heaters should be incorporated within individual
substation sections in order to prevent condensation.
3-8.5.2
Substations for 4160 or 13,800 Volts Service. Provide substations with
a secondary voltage of 4160 or 13,200 volts (nominal, as defined in ANSI C84.1,
voltage range "A), when required by SCDB for the classes of ships to be berthed.
System design should be such that the respective voltage (plus or minus 5 percent) is
provided at the shore service receptacles. Design of primary unit substations is similar
to fixed 480 volt substations except for voltage classifications and outlet assembly
provisions. Circuit breakers should be 5 kV vacuum drawout type, with interrupting
current rating based on available fault, and should be key interlocked with the primary
receptacles (to prevent use of receptacles unless respective breakers are open).
3-8.5.3
Portable Substations. See Figure D-3. The pier design must include
space allocation for the portable substations and provide the electrical primary
distribution system required to energize the portable substations. This includes primary
circuits, their disconnect switches, and the primary outlet assemblies. Design is similar
to fixed substations except for portability provisions.
3-8.5.4
480-Volt Outlet Assemblies. 480 Volt outlet assemblies (receptacles
and cable connections) vary with Activities but should be standardized on a Station-by-
Station basis. Additional information on the outlet assemblies and the actual
operational procedures used on the piers is available in MIL-HDBK-1025/10, Safety of
Electrical Transmission and Distribution Systems, Section 9, "Shore-to-Ship Electrical
Power Connections". Detailed specifications for the outlet assemblies are also included
in guide specification UFGS-16145, 480 Volt Pier Power Outlet Assemblies.
3-8.5.4.1
Receptacles. Ships hotel service receptacles must be provided in
weatherproof, corrosion-resistant pier outlet assemblies, or combined with the
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