Atlas Copco QAS108 Pd(S) Mk II Manual De Instrucciones página 17

To select high voltage, connect the terminal board as follows:
2-3
1
105 109 L1
To select low voltage, connect the terminal board as follows:
2-4
1-3
105 109 L1
After changing the output voltage, adjust the output voltage
by means of potentiometer R11 to the required value.
The dual voltage option cannot be combined with the sockets
!
option because the sockets may not be used at low voltage.
High current (HC)
The "High current" option allows to run the unit at low voltage
(= high current) or at high voltage (= low current).
!
All the cables that are used must be suitable for high current.
Q1
Q1....."Spectra" circuit breaker
Two different rating plugs are used to select low voltage (high
current) or high voltage (low current). First install the proper
rating plug. The "Spectra" circuit breaker then interrupts the low
voltage (high current) or high voltage (low current) power supply
towards X1 when a short-circuit occurs at the load side or when
the overcurrent protection (145 A in case of high voltage and
250 A in case of low voltage) is activated. It must be reset
manually after eliminating the problem and after each start.
6-7 10-11
4-8-12
5 9
L2 L3 N PE
6-8 10-12
5-7 9-11
L2 L3 N PE
U
R11
L1 L2 L3 N PE
R11 ...Output voltage adjust potentiometer
Allows to adjust the output voltage.
Carry out the following steps to select high voltage (low
current) or low voltage (high current):
– Change the connections on the terminal board of the
alternator.
– Plug in the proper rating plug (high or low current rating
plug) in the circuit breaker.
Serious damage may occur when the proper rating plug is not
plugged in. In that case the unit is not protected.
!
Changing the output voltage is only allowed after shutdown.
To select high voltage (low current), connect the terminal board
as follows:
2-3
1
105 109 L1
To select low voltage (high current), connect the terminal board
as follows:
2-4
1-3
105 109 L1
After changing the output voltage, adjust the output voltage
by means of potentiometer R11 to the required value.
The high current option cannot be combined with the sockets
!
option because the sockets may not be used at low voltage.
Remote start (RS)
The "Remote start" option allows to switch the unit on or off
without using the control panel located on the unit. The start
module of the control panel is replaced by a special module
which provides extra connections for the remote start/stop switch
and the plant contactor, both to be installed by the customer.
The plant contactor should be sized according to the load. The
maximum current through the voltage free contact is 3A.
The remote start/stop switch Sx has to meet the following
specifications: 24VDC, 4A.
Refer to the circuit diagram for the correct connection of the
plant contactor and the remote start/stop switch.
The minimum voltage relay on the main circuit breaker of the
standard unit is eliminated and replaced by a current coil
which switches off Q1 in case of an emergency stop or an
!
earth fault.
I
NSTRUCTION MANUAL
6-7 10-11
4-8-12
5 9
L2 L3 N PE
6-8 10-12
5-7 9-11
L2 L3 N PE
17