Regal 38 SAV 2019, Руководство пользователя

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AC Current
Overview
Alternating current sometimes called AC current
is brought on board through the use of a dock-
side (shore power) cord or produced on board
through the generator. Just as a residential home
uses 120/240 volts to run various household ap-
pliances and equipment the same holds true on
your vessel.
With AC current electrons “cycle” in one direction
a short distance and reverse themselves traveling
in the opposite direction. This is how AC became
known as alternating current. The rate that the cur-
rent reverses itself is referred to as frequency. In
the United States the alternating current frequency
is 60 cycles per second. Overseas a 50 cycle fre-
quency per second is standard. Component spec-
ifications must match the country’s frequency.
Basic Electric Terms
Voltage is a measurement of the electrical potential
that an electrical power source contains for doing
some type of work for us. Think of it as electrical
pressure. An example might be your boat’s battery.
Amperage is a particular amount of electricity flow-
ing through some part of a circuit. Think of it as the
rate of electrical flow through your boat’s wiring.
Resistance is measured in ohms and inhibits the
electrical flow through a circuit. An example would
possibly be an incandescent light bulb. The resis-
tance in the light bulb element allows it to glow
and brighten the cabin along with giving off heat.
It is important that you understand and respect the
alternating current system used on board. Be sure
to read and follow any danger, warning, or caution
labels in reference to the yacht’s electrical system
or individual equipment components. Most of all,
use common sense!
Dockside Cord Usage
The dock side cord is the basic component used to
deliver dual 30 amp service from the marina dock
power box to the vessel itself. Before plugging in
the dock side power cord check to see that all ves-
sel AC breakers are off. This includes the incoming
as well as both the main and equipment breakers
at the AC ship’s control panel. See the AC panel
illustration later in this chapter.
When connecting the shore power cord be sure to
twist the cord into the marina inlet plug. This motion
will lock the plug in the socket.
There may be several types of inlet plugs located
at the marina dock power center. Be advised that
the 30 amp plug is much smaller looking and the
50 amp cord will not physically fit it.
Also, marina dock power centers normally have
breakers that must be activated after installing the
dock side cord. Make sure the dock side cord has
enough slack to weather changing tides if applicable
and at the same time does not come in contact with
the water. Check with the marina dock master for
more information on their shore power operation
and requirements.