Table 1113: Start logic operation
Value of setting CB
failure mode
Value of setting CB
failure trip mode
Start logic reset condition
Current 1 out of 3 All phase currents drop below
Current value
setting.
1 out of 4 All phase currents drop below
Current value
setting and the residual current drops below
Current value Res
setting.
2 out of 4 Either of the following is true:
• All phase currents drop below
Current val-
ue
setting.
• The residual current drops below
Current
value Res
setting and (at least) two pha-
ses are below
Current value
setting.
Breaker status
1 out of 3
1 out of 4
2 out of 4
CB is in open position.
Both(AND) 1 out of 3 Either of the following is true:
• CB is in open position.
• All phase currents drop below
Current val-
ue
setting.
1 out of 4 Either of the following is true:
• CB is in open position.
• All phase currents drop below
Current val-
ue
setting and the residual current drops
below
Current value Res
setting.
2 out of 4 One of the following is true:
• CB is in open position.
• All phase currents drop below
Current val-
ue
setting.
• The residual current drops below
Current
value Res
setting and (at least) two pha-
ses are below
Current value
setting.
Both(OR) 1 out of 3 CB is in open position and all phase currents
drop below
Current value
setting.
1 out of 4 CB is in open position and all phase currents
drop below
Current value
setting and the re-
sidual current drops below
Current value Res
setting.
2 out of 4 CB is in open position and either of the fol-
lowing is true:
• All phase currents drop below
Current val-
ue
setting.
1MRS759142 F Protection related functions
REX640
Technical Manual
1165
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