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Running instructions
For your own interest, rigorously
comply with all relevant safety
instructions.
Never exceed the limitations stated in
the generator Technical Specifications.
When connecting the load distribution
panels, the circuit breakers or the
loads to the generator, local regulations
shall be complied with regarding
low-voltage (below 1000V)
installation connections.
Before a new start and whenever a
new load is connected,it is necessary
to check the generator ground
connection. The ground connections
shall be established either through
a grounding electrode (if any) or
through a suitable grounding
installation. The protection system
against excessive touch voltage is
only effective when an appropriate
ground connection exists.
The generator is connected to a
Ground-Neutral system as per IEC
364-3, i.e., there is a point in the
power supply directly connected to
ground, in this case the neutral. The
exposed conductive elements of the
electrical installation shall be
directly connected to the functional
ground.
If the generator runs in other power
current system, for example, in an
IT system, other protective devices
shall be installed for those specific
types. In any case, only a qualified
electrician is authorized to remove
the connections between neutral
and the ground terminals in the
alternator terminal box.
Installation
– Place the generator on an horizontal, leveled
and resistant floor. Maximum working
inclination 10 degrees.
– Generator doors shall be kept closed, to prevent
entry of water and dust.The entry of dust
decreasesfilter duration and may impair the
generator performance.
– The engine exhaust pipe shall not be directed
to the personnel. If the generator runs in a
closed space, install an exhaust pipe with enough
diameter to conduct exhaust gases to the
outside. Check if there isenough ventilation to
prevent cooling air recirculation.If necessary,
refer to Atlas Copco.
– Leave enough room for the generator running,
inspection and maintenance (at least 1 meter
from each side).
– Check if the internal grounding system complies
with local legislation.
– Use a coolant in the engine cooling system.
– Check bolt and nut tightness. See page 71.
– Install the grounding cable as close as possible
to the generator and make sure that the touch
voltage is not higher than 25 V.
– Check if the end of the grounding electrode
cable is connected to the grounding terminal.
Generator connection
Precautions in case of non-linear and
sensitive loads
Non-linear loads originate current
with high harmonics content,
causing a distortion in the voltage
waveform generated by the alternator.
The most common three-phase, non-linear loads,
are loads controlled by thyristor rectifiers, such as
converters supplying voltage to variable speed
motors, uninterrupted supply currents (UPS) and
telecommunication currents.Gas-discharge lighting
arranged in single-phase circuits generate high 3rd
order harmonics, with a risk of recording an
excessive neutral current.
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