Atlas Copco QAC 1100 Sd, Instruction Manual

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Block mode
When the block mode is selected, the unit does not
run certain actions.Which means that it is not
possible to start the generator set or to run any
circuit breaker operations.
To change the running mode from the screen, a
password is prompted to the user before making
the change.It is not possible to select the block
mode when the running feedback is present.
The purpose of the block mode is to make sure
that the generator set does not start, for example,
during maintenance work.If digital signals are used
to change the mode, it is important to know that
the setup output for the block mode is a constant
signal.When it is active (ON), the unit is at a block
status, and when it is deactivated (OFF) it comes
back the previously selected mode.
This generator is sized and predefined to run on
ISLAND mode, AMF mode or in parallel with other
generators.
For other applications refer to Atlas Copco before
making the connections.
Depending on the application, the user may need
to connect additional cables to X25 terminal
blocks.These terminal blocks are inside the control
box installed on a DIN trough.Refer to the circuit
diagram to make the connections properly.
Island operation
This application is only possible in combination
with the SEMI-AUTO or AUTO modes.The real-
time internal clock can only be used in AUTO.
This type of operation is selected for installations
with one or mode generators, but always without
electric mains (= off-line).In practice, a maximum
number of 16 generators can be installed in parallel.
Running with Auto Mains Failure (AMF)
This application is only possible in combination
with the AUTO mode.If the SEMI-AUTO mode is
selected, AMF running CANNOT be used!The unit
automatically starts the generator set and switches
to generator current in case of mains failure, from
a defined time for starting.
Auto Semi Test Main Block
Automatic network fault
(without advanced
synchronization)
X (X) X X X
Automatic network fault
(with advanced
synchronization) X (X) X X X
Island operation X X X X
Fixed power/base load X X X X X
Peak distribution X X X X X
Load take over X X X X X
Exporting network power X X X X X
Transformer maintenance X
Circuit breaker
assemblies, load sharing
X X X X
Circuit breaker
assemblies, power
management X (X) X X X
Running Mode
Generator Set Mode