ABB ATS022 Installation And Operating Instructions Manual page 12

Installation and operating instructions, ATS022
Time diagrams
Line 1 ok
CB1 CLOSED
Gen start
Line 2 ok
CB2 CLOSED
CB3 CLOSED
Figure 4.7: Application time diagram 3CBs NPL BUS TIE - generator in use
Line 1 ok
CB1 CLOSED
Line 2 ok
CB2 CLOSED
CB3 CLOSED
Figure 4.8: Application time diagram 3CBs NPL BUS TIE - generator not in use
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. main
line LN1.
1SDH000760R0002
TS TCE
TS TCE
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4. Applications of device ATS022
TBS TCN
TGOFF
TBS TCN