Settings
SEL-351P Quick-Start Installation and User's Guide (Portuguese)
55
No.
Setting
Default
Range
Incr.
33
Cold load pickup scheme
N
Y/N
The
Cold load pickup scheme
setting enables the cold load pickup scheme when set to Y.
•
This setting is hidden and set to N if
Delay curve - phase
(No. 10) is set to OFF and
Delay curve -
ground
(No. 11) is set to OFF.
•
If
Cold load pickup scheme
is set to Y, then you are prompted to program the following settings:
Setting
Default
Range
Incr.
Cold load pickup - phase
OFF
OFF, 1.00-19.99 multiples of Min.
trip - phase
0.01
The
Cold load pickup - phase
setting determines the phase current threshold for overcurrent detection
when the
Cold load pickup scheme
is active.
Example: If
Cold load pickup - phase
= 1.70 (multiples of
Min. trip - phase
),
Min. trip - phase
(No. 5) = 200.00 Amps primary, and the cold load pickup scheme is active, then the phase
current threshold for overcurrent detection operates at a value equal to:
1.70
•
200.00 Amps primary = 340.00 Amps primary
The upper limit of this setting (20.00 multiples) is calculated from the Amps secondary range upper
limit [20] and settings
CT Ratio
(No. 3) [200.0] and
Min. trip - phase
(No. 5) [200.00]:
(20
•
200.0)/200.00 = 20.00 multiples (upper limit)
Due to processor calculations and rounding techniques, displayed range numbers may appear slightly
different than expected (e.g., 19.99 instead of 20.00).
•
If
Cold load pickup - phase
is set to OFF, then the phase current threshold for overcurrent
detection remains unchanged (threshold remains equal to
Min. trip - phase
[No. 5]).
•
This setting is hidden and set to OFF if
Cold load pickup scheme
is set to N or
Delay curve -
phase
(No. 10) is set to OFF.
Содержание SEL-351P
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