Installation and operating instructions, ATS022
1SDH000760R0002, L4106
10
3. Description
3.1 ATS outputs
3.1.1 Opening/closing command to circuit breakers, DO1...DO4
The output relays command the circuit breakers to open and close its releases. The confi guration of the
output relays has been designed to allow the command of any type of motor operator through a direct
connection.
The device has been integrated with the automation logic to guaranty the highest-level safety for
commanding the circuit breakers.
To do that, the automation logic monitors the correct operation of the circuit breaker after a command
has been sent. If the feedback of the CB status is not received within 5 seconds of the sending of the
command, the device considers it as a failed command and operates as follows:
An alarm is generated: DO6 and DO9 activate.
Alarm LED switches on.
Alarm is set off by pushing the RESET key. After that the device is always in the Manual Mode to
prevent unwanted operation of the circuit breaker.
Exactly the same operations are performed for the protection device on the emergency line during the
back-switching sequence.
3.1.2 Gen-Set start/stop, DO5
Gen-Set start and stop is handled by a bistable relay. When the relay is active on DO5 Start X23:1, the
generator is started. When the relay is active on DO5 stop X23:3, the generator is stopped.
3.1.3 Alarm signaling, DO6
This contact is closed when the automatic transfer switch logic is active. If the contact is closed, it
means the logic is disabled and an alarm is generated.
3.1.4 Protection device alarm signaling, DO9
This contact is closed when opening or closing CB fails.
3.1.5 Auto/Manual signaling, DO10
This contact is closed when the operating mode is Manual.
3.1.6 Disconnection Secondary Loads, DO11
See page 32.
3.2 ATS inputs
3.2.1 CBs status Input, DI1, DI2
Two inputs are connected to the normal and emergency line circuit breakers auxiliary contacts
(CB open = open contact).
Please, check the rated voltages allowed for motor operators!
3. Description
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