Gucbir D-300 - Alternator; Prime Power; Standby Power; Decibel ( Db )

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2.4 Alternator: It is a device which converts the mechanic energy into electrical energy. We use brushless
and synchronous alternators in our generators.
2.5 Prime Power: It is the power can be described as the execuon in permanent and unchanged load for
unlimited of hours. It is the availability of the generator to run with maximum power and steadily.
2.6 Stand-by Power: It is the power measured/obtained by leaving the engine for cooling aer running and
then restarng the cooled generator. Standby Power can be calculated as the 1.1 mes of Prime Power. For
example it is menoned that a generator, which has 100 kvA of Prime Power, has 110 kvA Standby Power.
2.7 Decibel: Is a measurement of sound level. A logarithmic unit of sound intensity.10 mes the logarithm
of the rao of the sound intensity to some reference intensity. It is shown as “db”. It is originated from the
inventor of Alexander Graham Bell.
2.8 Triangle Connecon: To connect the phases of the generator in triangle form in three-phase generators.
When you use the two phases of three-phase system in order to get 120 / 240 V, the power decreases to
one third.
2.9 Four-stroke Engine: Internal combuson engine has to do the four movements in order to
complete its power cycle.
a. Intake stroke: With the descending movement of the piston inside the cylinder line, the mix
ture of fuel and air ll in.
b. Compression stroke: With both intake and exhaust valves closed, the piston returns to the
top of the cylinder compressing the fuel-air mixture.
c. Power stroke: While the piston is close to Top Dead Center, the compressed air–fuel mixture
is ignited, usually by a spark plug (for a gasoline) or by the heat and pressure of compression
(for a diesel cycle or compression ignion engine). The resulng massive pressure from the
combuson of the compressed fuel-air mixture drives the piston back down toward boom
dead center with tremendous force.
d. Exhaust stroke: During the exhaust stroke, the piston once again returns to top dead center
while the exhaust valve is open. This acon evacuates the products of combuson from the
cylinder by pushing the spent fuel-air mixture through the exhaust valve(s).
2.10 Frequency: In alternave voltage and current, it is the number of waves occurred at regular intervals.
The wave occurred in one second is indicated as “Hz”.
2.11 Fuel Injector: It is the part which atomizes the fuel to the combuson space in specic amounts.
2.12 Governor: It is system which perceives the velocity/speed of the engine by following the magnec
receptor or by following the frequency that exits from the generator. In the direcon of the engine speed,
it provides sending fuel into the combustor with the electrical control system in order to administer the
required revoluon.
2.13 Fuel-feed pump: It is the part which measures the fuel and sends it to the combustor.
2.14 Kilowa: The real electrical power which equals to 1000 wa.
2.15 Water Cooled Engine: It is an engine type that is cooled with water surrounding around the hot parts.
The hot water goes to the radiator and is cooled by the help of the fan; it goes to the engine again. This is
the cycle of the system.
2.16 Voltage Regulator: It is a device that provides to hold the generated voltage in required values both
inside and outside the system.
2.17 Star Connecon: It is a method in which the three phase generators are connected with each other in
the form of “Y”. A connecon used in a polyphase electrical device or system of devices in which the wind-
ings each have one end connected to a common juncon, the star point, and the other end to a separate
terminal.