QAS38 YdS TNV
12 2954 9020 00
2.9 Spillage free
A Spillage free skid with forklift slots allows the customer to trans-
port the generator easily with a forklift.
It avoids accidential spilling of engine fluids.
2.10 Triple voltage (3V)
The generator can run in three different modes:
–1 phase
– 3 phase, lower voltage
– 3 phase, higher voltage
Depending on which mode the generator is running in, circuit
breaker Q1.1 or Q1.2 will be operational.
Circuit breakers Q1.1 and Q1.2 cannot be switched on at the same
time. This is prevented by means of the auxiliary voltage selection
relays K11 and K12 (refer to the circuit diagram).
The selection between the three modes is done by means of S10.
S10.... Output voltage selector switch
Allows to select a 3 phase high output voltage, a 3 phase low
output voltage or a 1 phase low output voltage. Selector switch
S10 is located on the alternator.
1 phase
When using this selection, the generator provides a 240 V output
voltage.
3 phase lower voltage
When using this selection, the generator provides a 208 V output
voltage.
3 phase higher voltage
When using this selection, the generator provides a 480 V output
voltage.
3. Operating instructions
3.1 Installation
– Place the generator on a horizontal, even and solid floor.
– Protect the generator against dust and rain if it is operated outside.
– Check that the engine exhaust is not directed towards people. If the
generator is operated indoors, install an exhaust pipe of sufficient
diameter to duct the engine exhaust towards the outside. Check for
sufficient ventilation so that the cooling air is not recirculated. If
necessary, consult Atlas Copco.
– Leave enough space for operation, inspection and maintenance (at
least 1 meter at each side).
– Check that the inner earthing system is in compliance with the local
legislation.
– Use coolant for the engine cooling system. Refer to the Engine in-
struction book for the proper coolant mixture.
– Check the tightness of the bolts and nuts.
Changing the output voltage is only allowed after
shutdown.
After changing the output voltage by means of the
selection switch S10, adjust the output voltage by
means of potentiometer R11 to the required value.
In your own interest, always strictly observe all rele-
vant safety instructions.
Do not operate the generator in excess of the limita-
tions mentioned in the Technical Specifications.
Local rules concerning the setting up of low voltage
power installations (below 1,000 V) must be
respected when connecting site distribution panels,
switch gear or loads to the generator.
At each start-up and at any time a new load is con-
nected, the earthing of the generator must be veri-
fied. Earthing must be done either by the earthing
rod or, if available, by an existing, suitable earthing
installation. The protective system against excessive
contact voltage is not effective unless a suitable
earthing is made.
The generator is wired for a TN-system to IEC 364-
3, i.e. one point in the power source directly earthed
- in this case the neutral. The exposed conductive
parts of the electric installation must be directly con-
nected to the functional earth.
If operating the generator in another power system,
e.g. an IT-system, other protective devices required
for these types must be installed. In any case only a
qualified electrician is authorized to remove the con-
nection between the neutral (N) and earth terminals
in the terminal box of the alternator.
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