Schweitzer Engineering SEL-351P, Quick Start Manual

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Settings
44 SEL-351P Quick-Start Installation and User's Guide (Portuguese)
No. Setting Default Range Incr.
13 Operations - phase fast
curve 2 OFF, 1-5 1
The Operations - phase fast curve setting determines the number of phase fast curve trip operations (e.g.,
if Operations - phase fast curve = 2, then the phase fast curve is enabled for the first two [2] trip
operations).
•
This setting is hidden and set to OFF if Fast curve - phase (No. 8) is set to OFF.
•
This setting only enables the phase fast curve operations; it does not disable the phase delay curve (the
phase delay curve is always active). Traditional protection schemes use fast curves followed by delay
curves so the delay curves do not have to be defeated. If a slower first operation than second operation
is desired, higher logic level settings changes are required
.
No. Setting Default Range Incr.
14 Operations - ground fast
curve 2 OFF, 1-5 1
The Operations - ground fast curve setting determines the number of ground fast curve trip operations
(e.g., if Operations - ground fast curve = 2, then the ground fast curve is enabled for the first two [2] trip
operations).
•
This setting is hidden and set to OFF if Fast curve - ground (No. 9) is set to OFF.
•
This setting only enables the ground fast curve operations; it does not disable the ground delay curve
(the ground delay curve is always active, provided that the TERRA HABILITADO operator control is
on). Traditional protection schemes use fast curves followed by delay curves so the delay curves do not
have to be defeated. If a slower first operation than second operation is desired, higher logic level
settings changes are required.
No. Setting Default Range Incr.
15 Operations to lockout -
phase 4 OFF, 1-5 1
The Operations to lockout - phase setting determines the total number of phase curve trip operations. The
difference between setting Operations to lockout - phase and setting Operations - phase fast curve (No. 13)
is the number of remaining phase delay curve operations (e.g., 4 - 2 = 2).
The setting range for Operations to lockout - phase adjusts according to Operations - phase fast curve
(e.g., if Operations - phase fast curve = 2, then the range for Operations to lockout - phase is from 2 to 5).
•
If Delay curve - phase (No. 10) = OFF, then Operations to lockout - phase is set automatically equal to
Operations - phase fast curve , and there are no phase delay curve operations (e.g., 2 - 2 = 0).
•
This setting is hidden and set to OFF if Min. trip - phase (No. 5) 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 - phase (No. 5) and Delay curve - phase (No. 10) are set to values other than
OFF, the phase delay curve element is still active. If absolutely no phase protection is desired (e.g.,
“switch” mode),
Min. trip - phase (No. 5) or Delay curve - phase (No. 10) must also be set to OFF.