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.
Содержание SEL-351P
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