Settings
SEL-351P Quick-Start Installation and User's Guide (Portuguese) 45
No. Setting Default Range Incr.
16 Operations to lockout -
ground
4 OFF, 1-5 1
The Operations to lockout - ground setting determines the total number of ground curve trip operations. The
difference between setting Operations to lockout - ground and setting Operations - ground fast curve
(No. 14) is the number of remaining ground delay curve operations (e.g., 4 - 2 = 2).
The setting range for Operations to lockout - ground adjusts according to Operations - ground fast curve
(e.g., if Operations - ground fast curve = 2, then the range for Operations to lockout - ground is from 2
to 5).
• If Delay curve - ground (No. 11) = OFF, then Operations to lockout - ground is set automatically equal
to Operations - ground fast curve, and there are no ground delay curve operations (e.g., 2 - 2 = 0).
• This setting is hidden and set to OFF if Min. trip - ground (No. 6) is set to OFF.
• WARNING: If Operations to lockout - phase (No. 15), Operations to lockout - ground (No. 16), and
Operations to lockout - SEF (No. 17) are all set to OFF, then overcurrent protection and reclosing are
disabled.
However, if both Min. trip - ground (No. 6) and Delay curve - ground (No. 11) are set to values other
than OFF, the ground delay curve element is still active (provided the TERRA HABILITADO operator
control is on). If absolutely no ground protection is desired (e.g., “switch” mode), Min. trip - ground
(No. 6) or Delay curve - ground (No. 11) must also be set to OFF.
No. Setting Default Range Incr.
17 Operations to lockout - SEF OFF OFF, 1-5 1
The Operations to lockout - SEF setting determines the number of SEF (sensitive earth fault) element trip
operations.
• This setting is hidden and set to OFF if Min. trip - SEF (No. 7) is set to OFF.
• WARNING: If Operations to lockout - phase (No. 15), Operations to lockout - ground (No. 16), and
Operations to lockout - SEF (No. 17) are all set to OFF, then overcurrent protection and reclosing are
disabled. See similar warnings for preceding setting number 15 and setting number 16.
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