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 TM 55-1905-223-24-3
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.
Contractors are normally used in motorcircuit 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, alternating
current is converted to direct current by a diode.
EXCITATION
The direct current input to the field coils of a generator which
produces the magnetic flux required for inducing voltage into
the generator stator coils.
EXCITER
An electrical device used for supplying the excitation to the
EXCITER CURRENT
The direct current supplied to the exciter field coils which is
controlled by the voltage regulator.
EXCITER ROTOR
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 3
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