Atlas Copco QAC 1100 Sd, Instruction Manual

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• Only G1 runs; with a load of 210 kW (300 kW
- 90 kW) => G2 starts.
• G1 and G2 are running; with a load of 410 kW
(200 kW + 300 kW - 90 kW) => G3 (generator
3) starts.
– The stop signal is defined at 100 kW and the
priority is defined for (high) G1 > G2 > G3
(low).
Stop signal if:
Total necessary power <(Total available power
of the running generator sets- Power of the
generator with lowest priority - defining stop
signal).
• G1, G2 and G3 are running; with a load of 400 kW
(700 kW - 200 kW - 100 kW)
=> G3 stops.
• G1 and G2 are running; with a load of 200 kW
(500 kW - 200 kW - 100 kW) =>G2 stops.
The priorities for starting and stopping the
generators can be selected from the priority
definitions or in the number of service hours.In
the manual mode, the start and stop sequence is
determined by the priority selected between the
generators.The generator with the lowest priority
will start last and will stop first.If service hours are
selected as priority, the start and stop sequence will
be defined based on the current service hours of the
different generators.The lowest running hours will
have the highest priority.
When the generators are operating
in parallel with PMS, it is no longer
necessary to use the analogous load
s h a r i n g l i n e s . T h i s w i l l b e d o n e
through the PMS communication
l i n e s .
Use a shielded CAN communication
cable, with a maximum total length
of 200 meters. Do not ground the
cable shield! Use a 120-ohm resistor
in both PMS end controllers.
1= Sharer, 2= Cable, 3= End resistor (male), 4=
End resistor (female).
Parallel running (synchronization)
Before starting the parallel running of two
generators, the following connections shall be made:
–
Connect the communication cable between the
two generators when connecting the adapter
to X30 outlet.
– Connect the load to the generator.
Though the distribution panel (to be installed by
the customer), connect the generator(s) to the load.
Always connect the generator with the load and
never directly with a second generator.
When making the parallel connection,
m a k e s u r e t h e G r o u n d L e a k a g e
R e l a y ( i f a n y ) w a s d e a c t i v a t e d ,
setting S13 switch to the OFF position.