Automatic Mode (Aut) - Siemens SENTRON ATC6300 Manual

8.1.4

Automatic mode (AUT)

The AUT mode is indicated by the illumination of the corresponding green LED.
In the automatic mode the mechanism automatically performs not only the opening and
closing of the breakers, but also the switching on and off of the gen-sets, where present.
If the values of the priority line are outside the thresholds (green LED "Line presence" goes
out), the unit disconnects the load from the priority line after expiry of the set delay and
connects it to the secondary line. Not only the startup of any available generator, but also the
switching and interlock time are controlled in this process.
Using the parameter P05.05 in menu P05 Changeover, the unit can be programmed so that
the priority line breaker is opened before or after the secondary line has been made
available.
As soon as the priority line comes back within the limits, the unit will switch back the load on
it and initiate the cooling of the generator. Furthermore, the parameter P05.12 can also be
used to lock the automatic return to the priority line.
The cycles of automation operation vary not only according to the type of application
(network/network, network/generator, generator/generator), but also depending on the type
of switching device used (breakers with motor operators, transfer switching equipment with
motor operators or contactors).
3KC ATC6300 transfer control device
Manual, 03/2018, L1V30535632002A-01
8.1 Operating modes of the ATC6300
Operation
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