7
as stand-by in case of interruption of the mains.
The generator operates at 230/220 V in line-to-neutral
mode and 400/440 V in line-to-line mode. Mono-
phase Genset operates at 230/220 V in line-to-neutral
mode.
Figure 3.1. Typical generator set configuration
3.2. Generating Set Main Parts;
1. Aksa generator set rating label.
2. Diesel engine.
3. Air filter.
4. Battery.
5. Battery charging alternator.
6. Radiator.
7. Alternator.
8. Terminal box.
9. Base frame.
10. Fuel tank (inside the base frame).
11. Vibration isolators.
12. Control Panel.
3.3. Diesel Engine
The diesel engine powering the generator set (Item 2)
has been chosen for its reliability and the fact that it has
been specifically designed for powering generator sets.
The engine is of the heavy duty industrial type with 4
stroke compression ignition and is fitted with all acces-
sories to provide a reliable power supply. These acces-
sories include, among others, a cartridge type dry air
filter (item 3) and an electronic engine speed governor.
3.4. Engine Electrical System
The engine electrical system is 12 volt DC, negative
ground/earth. This system includes an electric engine
starter, a battery (item 4) and a battery charging alter-
nator (item 5). For 12 volts electrical system one bat-
tery is given. Other types of batteries may be fitted if
they were specified. Batteries are detailed in Section 4.
3.5. Cooling System
The engine cooling system is water cooled. The water
cooled system is comprised of a radiator (item 6) , a
pusher fan and coolant pump. The alternator has its
own internal fan to cool the alternator components.
3.6. Synchronous Alternator;
Horizontal axle alternator (synchronous three phase),
on rolling bearings, self-ventilated within the room with
low-loss silicon-sheet stator bundle, electrolytic copper
winding with class H insulation.
Case –type damper winding for parallel operation (on
high-powered alternators).
The output electrical power is normally produced by a
screen protected and drip-proof, self-exciting, self reg-
ulating, three phase alternators are with brush, mono
phase alternators are brushless alternator. (Item 7)
Fine tuned to the output of this generator set. Mount-
ed on top of the alternator is a sheet steel terminal
box (item 8)
3.7. Fuel tank and Base frame
The engine and alternator are coupled together and
mounted on a heavy duty steel base-frame (Item 9).
This base frame includes a fuel tank (Item 10)
3.8. Vibration Isolation
The generator set is fitted with vibration isolators (Item
11) which are designed to reduce engine vibration be-
ing transmitted
to the foundation on which the generator set is
mounted.
These isolators are fitted between the engine /alterna-
tor feet and the base frame.
3.9. Silencer and Exhaust system
An exhaust silencer is provided with the generator
set. The silencer and exhaust system reduce the noise
emission from the engine and can direct exhaust sys-
tem reduce the noise
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