removable faceplate panels. For operational access, the
installation consists of shore power receptacles, a
circuit breakers, switches, and fuses are mounted on
portable shore power cable, and a mobile electric power
plant.
t h e s e panels. Internally, the switchboard contains
contractors, relays, fuses, transformers, control modules,
and electrical busses.
Shore Power Receptacles
Platform Deck Switchboard
The two shore power receptacles, shore power
receptacles No. 1 and No. 2, are each capable of
The platform deck switchboard (2S) is shown in
receiving 450-V, 3-phase, 400-Hz shore power. Each
figure 7-35. The platform deck switchboard is
receptacle is rated for the shore power electrical load of
essentially the same as the main deck switchboard,
the ship, plus a 30 percent growth margin.
except that it serves generator No. 2 and shore power
receptacle No. 2.
Each receptacle is connected to its respective ship's
electrical power system switchboards. Manual controls
As shown in figure 7-35, the enclosure for the
for the receptacles are provided both at the EOS console
platform deck switchboard is equipped with hinged
a n d the switchboards. Shore power monitors are
f a c e p l a t e doors and removable front panels for
installed in each switchboard to make certain the input
maintenance access. Circuit breakers, switches, and
voltage, frequency, and phase rotation are within the
display meters are installed on the panel doors. The
following limits before shore power is applied to the
electrical power busses, terminal strips, switching
ship's electrical system:
units, and control modules are mounted inside the
enclosure.
Voltage
410 to 471 V ac
365 to 435 Hz
SHORE POWER
Phase rotation
AB, BC, CA
A means of supplying electrical power to the PHM
The shore power receptacles also provide capability
from an external source is known as shore power. This
to supply 450-V, 3-phase, 400-Hz power to one or two
sister ships, although feedthrough capability is not
p r o v i d e d . Instead, a portable shore power cable
assembly, 30 meters in length, is provided to connect the
shore power receptacles to the sister ship.
Shore power of 60 Hz can also be connected to the
PHM through two connectors on a common housing
attached to the aft bulkhead of the deckhouse on the
starboard side. One receptacle provides connection
capability for 120-V, 3-phase power, while the other
receptacle provides the same capability for 450-V,
3-phase power.
Mobile Electric Power Plant
Most piers where the PHM will dock cannot provide
the special power required by the hydrofoil's electrical
system. For this reason, mobile electric power plants are
usually shipped to the ports where the PHM will be
docked.
Each mobile electric power unit is composed of a
motor generator and ashore power transformer. The unit
i s completely equipped with voltage regulator
instruments, protective devices, and operating controls
Figure 7-35.--Platform deck switchboard.
enclosed in a weatherproof, ventilated housing. The
7-37
