Settings
58 SEL-351P Quick-Start Installation and User's Guide (Portuguese)
Setting Default Range Incr.
Restore min. trip - ground N Y/N
Restore min. trip - ground = Y:
If the cold load pickup scheme is active, the ground current threshold for overcurrent detection is
forced
back to the regular Min. trip - ground (No. 6) level when the preceding Restore min.
trips - time limit times out.
Restore min. trip - ground = N:
If the cold load pickup scheme is active, the ground current threshold for overcurrent detection can
only return back to its regular Min. trip - ground level naturally
as described with the preceding
Loss of load diversity timer setting.
• This setting is hidden and set to N if Restore min. trips - time limit is set to OFF or Delay curve
- ground (No. 11) is set to OFF.
Setting Default Range Incr.
Restore min. trip - SEF N Y/N
Restore min. trip - SEF = Y:
If the cold load pickup scheme is active, the SEF current threshold for overcurrent detection is
forced
back to the regular Min. trip - SEF (No. 7) level when the preceding Restore min. trips -
time limit times out. The ground current threshold for overcurrent detection derived from setting
Cold load pickup - ground is also applied to the SEF element (as the SEF current threshold for
overcurrent detection).
Restore min. trip - SEF = N:
If the cold load pickup scheme is active, the SEF current threshold for overcurrent detection can
only return back to its regular Min. trip - SEF level naturally
as described with the preceding
Loss of load diversity timer setting.
• This setting is hidden and set to N if Restore min. trips - time limit is set to OFF, Delay
curve - ground (No. 11) is set to OFF, or Min. trip - SEF (No. 7) is set to OFF.
No. Setting Default Range Incr.
34 Sequence coordination N Y/N
The Sequence coordination setting keeps the SEL-351P in step with a downstream recloser control,
preventing the overreaching SEL-351P Fast curve elements from tripping for faults beyond the downstream
recloser.
Sequence coordination advances the operations counter each time the following sequence occurs:
• The SEL-351P is in the reset state.
• Fast curve - phase (No. 8) or Fast curve - ground (No. 9) element picks up and starts timing for a
fault.
• Fast curve - phase (No. 8) or Fast curve - ground (No. 9) element remains picked up for at least
1.25 cycles, but then drops out before tripping (fault was interrupted by downstream device closer to
the fault).
When the operations counter is advanced beyond the corresponding Operations - phase fast curve (No. 13)
or
Operations - ground fast curve (No. 14), no more advancing of the operations counter occurs (the Fast
curve elements are disabled). The Fast curve elements are enabled again (the operations counter is reset)
after a time period equal to Reset time for auto reclose (No. 22).
• This setting is hidden and set to N if the Fast curve - phase and
the Fast curve - ground settings are both
set to OFF.
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