ABB ATS022, Installation And Operating Instructions Manual

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1SDH000760R0002, L4106
Installation and operating instructions, ATS022
3. Description
Figure 3.7 Transformer on normal line and generator on emergency line
In this scenario, the ATS022 works in the same way as the previous one. The main difference is that it
also manages the status of the generator.
3.3.2 Transformer on normal line and generator on emergency line
Figure 3.6 Logic operation when closing command is OK
KA00395
Under 5 s
CB2 status
Alarm
Closing CB2
G
KA00427
If the auxiliary power is used the device doesn’t go to the powersave.
c) Missing of both lines
The missing of both lines is indicated by a blinking Power LED. In this case, the ATS022 will be in a
power saving state. If both lines are missing more than one minute, the ATS022 will shut down.
If the normal line or the emergency line comes back supplying the ATS022 in Auto Mode, it will analyze
the conditions of the monitored lines and the status of the two protection devices (or the position of the
circuit breaker) and it will switch on the line that is OK giving priority to the normal line.
If the ATS022 is in Manual mode before the voltage drop, it cannot change its state, although the voltage
comes back to the other line.