Output Terminal Board; Operating Instructions; Installation - Atlas Copco QAS108 Pd(S) Mk II Manual De Instrucciones

QAS108 Pd(S) Mk II
O
UTPUT TERMINAL BOARD
The output terminal board is situated below the control and
indicator panel.
Q1
N13 ...Earth leak detector
Detects and indicates an earth fault current and activates the
main circuit breaker Q1. The detection level can be set at
0.03 A fixed with instantaneous trip but can also be adjusted
between 0.1 A and 1 A with time delayed (0 – 0.5 sec) trip. N13
has to be reset manually after eliminating the problem (reset
button marked R). It can be overridden by means of the earth
leak switch (S13, labelled I∆N) but has to be tested monthly
(by pushing test button T).
S2 .....Emergency stop button
Push the button to stop the generator in case of an emer-
gency. When the button is pressed, it must be unlocked, by
turning it anti-clockwise, before the generator can be restarted.
Q1.....Main circuit breaker and minimum voltage relay
Interrupts the power supply to X1 when a short-circuit occurs
at the load side, or when the overcurrent protection (145 A) is
activated. When activated, Q1 interrupts the three phases
towards X1. It can be activated again after eliminating the
problem.
X1 .....Main power supply (400 V AC)
Terminals L1, L2, L3, N (= neutral) and PE (= earthing), hidden
behind the control panel door and behind a small transparent
door.
8
ATS
1 500
0,1 0
T
0,03>0,1A
0,5 250
A
IAn(A) ms
L1 L2 L3 N PE
X1

OPERATING INSTRUCTIONS

In your own interest, always strictly observe all relevant safety
instructions.
Do not operate the generator in excess of the limitations
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
N13
generator.
At each start-up and at any time a new load is connected, the
earthing of the generator must be verified. 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 connected 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 connection between the neutral (N)
!
and earth terminals in the terminal box of the alternator.
S2
I
NSTALLATION
– 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 ven-
tilation so that the cooling air is not recirculated. If
necessary, consult Atlas Copco.
– Leave enough space for operation, inspection and mainte-
nance (at least 1 meter at each side).
– Check that the inner earthing system is in compliance with
the local legislation.
– Install the earthing rod as near as possible to the generator
and measure its diffusion resistance (max. 1 KΩ) in order
not to have a contact voltage higher than 25 V at 30 mA
leakage current.
– Check that the cable end of the earthing rod is connected
to the earth terminal.
– Use coolant for the engine cooling system. If low
temperatures are expected (close to 0 °C), the engine
cooling system must be protected (refer to the Engine
instruction book).
– Check the tightness of the bolts and nuts.