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 TM 55-1905-223-24-6
GLOSSARY - CONT
DEFINITIONS - CONT
EXCITER STATOR
-
The stationary member of the exciter which serves as the exciter
field producing the magnetic field from the direct current supplied
by the automatic voltage regulator.
FIELD
-
That part of ,the generator and exciter which, when supplied wi
direct current, will produce a magnetic field. The exciter stator
as the generator field.
FREQUENCY
-
The number of complete cycles of alternating current per unit of
time. Typically, frequency is expressed in cycles per second or
Hertz (Hz).
GENERATOR ROTOR
-
The rotating member of the generator.
GENERATOR STATOR
-
The stationary member of the main generator which supplies the
three-phase output power to the load.
GLYCOLS
-
A group of chemicals used to lower the freezing point of water.
GOVERNOR
-
A device which controls engine speed and thus the generator
output frequency.
GROUND
-
A connection, either accidental or intentional, between an
electrical potential and the earth or some conducting body serving
in place of the earth.
HEAT SINK
-
A device which absorbs heat from electrical devices such as
diodes and SCRs and dissipates the heat to the surrounding air.
HERTZ
-
A term equivalent to cycles per second. (See Frequency).
HUNTING
-
Oscillation in frequency or in voltage where steady-state
conditions are not reached, particularly after a load transient
change.
INSULATION
-
A non-conductive material such as rubber or plastic intended to
prevent current from flowing. Technically, insulation is any
material which resists the flow of current.
-
INSULATION RESISTANCE
A measure of the ability of insulation to prevent current from
flowing. A megohmmeter is used to measure the resistance in
millions of ohms between the windings and metal frame of a
generator to determine the insulation resistance of the windings.
Glossary 5
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