Atlas Copco QAS 14 Kd S5 ESF Instruction Manual page 42

4.3.4.3 Running modes
The unit has three different running modes and one
block mode. The different running modes are selected
via the display or the PARUS software.
Auto
In AUTO mode, the unit will operate automatically,
and the operator cannot initiate any sequences
manually.
Test
When TEST mode is selected, a test sequence will
start. In this mode it is possible to perform two types
of tests: a Simple test or a Full test. The type of test is
selected in parameter 7040.
The test will be interrupted if the
!
mode is changed to either MANUAL
or AUTO.
Manual
In MANUAL mode the unit will not initiate any
sequences automatically. It will only initiate
sequences, if external signals are given.
Block
When BLOCK mode is selected, the unit is not able
to initiate any sequences, e.g. the start sequence.
BLOCK mode must be selected when maintenance
work is carried out on the genset.
The genset will shut down if
!
BLOCK mode is selected while the
genset is running.
4.3.4.4 Application modes
Island operation
– This operation mode is selected for local/remote
start applications, without the Mains (= stand-
alone).
– Combined with MANUAL mode = Local Start
operation.
• The sequence is: start / close generator breaker
(manually) / genset operation / open generator
breaker (manually) / open generator breaker /
stop.
– Combined with AUTO mode = Remote Start
operation.
• The remote start signal can be given with an
external switch. Before the generator will be
started, the generator breaker must be closed.
• Installation wiring for Remote Start operation:
wire the RS switch between X25.R1 &
X25.R2.
Automatic Mains Failure (AMF) operation
This application is only possible in
!
combination with the AUTO mode.
If the MANUAL mode is selected
the AMF operation will NOT
function!
– When the Mains exceeds the defined voltage /
frequency limits for a defined delay time, the
generator will take over the load automatically.
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– When the mains is restored within the defined
limits for a defined time, the generator will unload
before disconnecting and switching back to the
Mains.
– The generator will then go into cooldown and
stop. It will stay stand-by for the next event.
– Installation wiring for Remote Start operation:
refer to the Circuit diagrams section for the correct
connections.
To operate the unit in AMF mode,
!
make sure that the PTB (Power
Transfer Box) is properly installed,
see page 74.
Refer to the Circuit diagrams
section for the correct
Load Take Over (LTO) operation
– This operation mode is selected for local/remote
start applications.
– Combined with MANUAL mode = Local Start
operation.
• The sequence is: start / open mains breaker
contactor / close generator breaker contactor/
genset operation / open generator breaker
contactor / close mains breaker contactor /
stop.
connections.