Using Pushbuttons In Manual Mode - ABB ATS021 Installation And Operating Instructions Manual

5. Using the automatic transfer switch
DIP switch S24-4 for setting Tgoff
S24-4 Positions
OFF
ON
Figure 5.7: Description of settings DIP Switches S22 - ATS021

5.6 Using pushbuttons in manual mode

Opening/Closing circuit breakers CB1, CB2
In manual mode the circuit breakers can be controlled by means of pushbuttons CB1 and CB2. In case
of a fault, the alarms are activated by the same methods as those for the automatic switching sequence.
Pressing the CB1 key:
• If CB1 is closed, the opening command is sent to CB1
• If CB1 and CB2 are both open, the closing command is sent to CB1
• If CB1 is open and CB2 is closed, no operation is carried out
Pressing CB2 key:
• If CB2 is closed, the opening command is sent to CB2
• If CB2 and CB1 are both open, the closing command is sent to CB2
• If CB2 is open and CB1 is closed, no operation is carried out
Manual Start/Stop of generator
In manual mode, the combination of the RESET, CB1 and CB2 keys allows Start/Stop of the generator.
• Generator Start: keeping RESET pressed, press CB1
• Generator Stop: keeping RESET pressed, press CB2
1SDH000759R0002
Tgoff
Tgoff = Ts
Tgoff = 5 minutes
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Installation and operating instructions, ATS021