26 2954 2100 01
QAS 14 - 20 Pd
2.6.10 Standard applications
In the Qc3001™ module 3 application types can be selected (in
channel
4320). A combination of each application type with the
running mode results in a specific application.
Depending on the application the user has to connect extra wirings
to terminal blocks X25. These terminal blocks can be found inside
the control box on a DIN-rail. We refer to the circuit diagram 9822
0992 09/03 for the correct connections.
Island operation
This operation type is selected for installations with one or more
generators, but always without the Mains (= stand-alone).
– Combined with Semi-auto mode = Local Start operation. The
sequences start/stop can be activated manually.
– Combined with Auto mode = Remote Start operation.
The remote start signal can be given with an external switch or with
the internal real time clock. (8 start/stop commands can be defined
in channels 4710-4780).
Installation wirings:
– For Remote Start operation: wire the RS switch between X25.9 &
X25.10.
Automatic Mains Failure (AMF) operation
This application is only possible in combination with the Auto
mode. If the Semi-auto mode is selected the AMF operation will
NOT function!
When the Mains exceeds the defined voltage/frequency/current/
speed limits for a defined delay time, the generator will take over
the load automatically.
When the mains is restored within the defined limits for a defined
time, the generator will go into cool down and stop.
Installation wirings:
– The Mains sensing lines L1 / L2 / L3 have to be wired to terminals
X25.3 / X25.4 / X25.5 (Mains neutral is not sensed). If the busbar
sensing lines are wired, they have to be removed.
Load Take Over (LTO) operation
This application is normally used in combination with Semi-auto or
Auto mode in installations with the Mains. The generator will start-
up and take over the load from the Mains.
Installation wirings:
– The Mains sensing lines L1 / L2 / L3 have to be wired to terminals
X25.3 / X25.4 / X25.5 (Mains neutral is not sensed). If the busbar
sensing lines are wired, they have to be removed.
2.6.11 Overview of applications
From each of the above applications the module can jump into the Test mode, by pushing the dedicated Test button on the LCDisplay. The
generator will follow the defined Test sequences and afterwards the generator will return in its previous application, always in combination
with the AUTO mode.
The generator cannot be started with an external
signal, if the internal real time clock commands are
enabled!
!
Single gen-set
Island operation
SEMI-AUTO mode
AUTO mode
AMF operation
(SEMI-AUTO mode)
AUTO mode
Load Take Over
SEMI-AUTO mode
AUTO mode
1. Each installation has to be prepared and reviewed very carefully before start-up. Wrong or incomplete wirings can dam-
age the installation brutally!
2. Each application requires a specific combination of the following parameters:
• Test / Semi-auto / Auto mode
• Island / AMF / LTO application type
3. For more information on the Qc3001™ module and its applications, we refer to the Qc3001™ User Manual. If you need
more assistance, please contact Atlas Copco.
!
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