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 TM 55-1905-223-24-6
GLOSSARY -CONT
DEFINITIONS - CONT
COOLANT
-
The circulating element, generally fresh water, which carries away the
head generated by the friction of moving parts of an engine.
CONDUCTOR
-
A wire, cable, bus, or other device intended to distribute current from the
supply to the load. Technically, a conductor is any device which will
permit the flow of current.
CONTACTOR
-
A device for opening and closing an electric circuit. Contactors are
normally used in motor circuit where large amounts of current are
controlled.
CURRENT
-
The flow of electrons in a circuit forced by an applied voltage potential
(See Alternating Current and direct Current).
CYCLE
-
A complete set of events before repetition occurs. In alternating current
or voltage, a cycle starts at zero, continues to a maximum positive
value, returns to zero, continues to a maximum negative value, and is
completed at zero.
-
A two terminal solid-state device which permits current to flow in one
direction, but not in the other. In alternating current circuits, a diode will
permit one half cycle to flow but will resist the flow of the opposite half
cycle of current. Thus, alternatin-g current is converted to direct current
by a diode.
EXCITATION
-
The direct current input to the field coils of a generator which produces
coils.
EXCITER
-
An electrical device used for supplying the excitation to the generator
field (see Exciter Rotor and Exciter Stator).
EXCITER CURRENT
-
The direct current supplied to the exciter field coils which is controlled by
the voltage regulator.
EXCITER ROTOR
-
The rotating member of the exciter into which a three-phase alternating
voltage is induced. The resulting ac is then rectified into direct current
and applied to the rotating generator field windings.
Glossary 4
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