ABB ATS022 Installation And Operating Instructions Manual page 13

4. Applications of device ATS022
Line 1 ok
CB1 CLOSED
Gen start
Line 2 ok
CB2 CLOSED
CB3 CLOSED
Figure 4.9: Application time diagram 3CBs NPL- generator in use
Line 1 ok
CB1 CLOSED
Line 2 ok
CB2 CLOSED
CB3 CLOSED
Figure 4.10: Application time diagram 3CBs NPL - generator not in use - main line LN1
Special cases: if LN1 returns to normal before LN2, the sequence is interrupted and the generator is
switched off; if LN1 returns to normal during TCE, the sequence is completed. If LN1 disappears during
TBS, the sequence is interrupted; if LN1 disappears during TCN, the switchboard starts TS running in
order to re-enter on LN2. If LN2 disappears during TCE, the procedure is in any case completed.
1SDH000760R0002
TS TCE
TS TCE
13
Installation and operating instructions, ATS022
TBS TCN
TBS TCN
TGOFF