Settings
52 SEL-351P Quick-Start Installation and User's Guide (Portuguese)
Setting Default Range Incr.
Time delay - phase high
current trip
0.00 0-16000.00 cycles 0.25 cyc.
The Time delay - phase high current trip setting programs an intentional time delay for the phase
high current tripping. If set to zero (0), phase high current tripping operates instantaneously.
• This setting is hidden and set to zero (0) if High current trip - phase is set to N.
Setting Default Range Incr.
Activate high current trip -
phase
OFF OFF, 1-5 1
The Activate high current trip - phase setting determines when phase high current tripping is enabled
(e.g., if Activate high current trip - phase = 2, then phase high current tripping is enabled for the
second [2nd] trip operation and every following trip operation).
The setting range for Activate high current trip - phase adjusts according to Operations to lockout -
phase (e.g., if Operations to lockout - phase = 4, then the range for Activate high current trip -
phase is from 1 to 4).
• This setting is hidden and set to OFF if High current trip - phase is set to N.
No. Setting Default Range Incr.
30 High current trip - ground N Y/N
The High current trip - ground setting enables the following three settings for ground high current tripping,
if set to Y. Ground high current tripping is not affected by the cold load pickup scheme.
• This setting is hidden and set to N if Fast curve - ground (No. 9) and Delay curve - ground (No. 11) are
both set to OFF.
Setting Default Range Incr.
High current trip - ground OFF OFF, 1.00-79.99 multiples of Min.
trip - ground
0.01
The High current trip - ground (multiples of Min. trip - ground) setting determines the ground
current threshold for ground high current tripping.
Example: If High current trip - ground = 44.00 (multiples of Min. trip - ground) and Min. trip -
ground (No. 6) = 50.00 Amps primary, then the ground current threshold for ground high
current tripping operates at a value equal to:
44.00 • 50.00 Amps primary = 2200.00 Amps primary
The upper limit of this setting (80.00 multiples) is calculated from the Amps secondary range upper
limit [20] and settings CT Ratio (No. 3) [200.0] and Min. trip - ground (No. 6) [50.00]:
(20 • 200.0)/50.00 = 80.00 multiples (upper limit)
Due to processor calculations and rounding techniques, displayed range numbers may appear slightly
different than expected (e.g., 79.99 instead of 80.00).
• This setting is hidden and set to OFF if High current trip - ground is set to N.
Setting Default Range Incr.
Time delay - ground high
current trip
0.00 0-16000.00 cycles 0.25 cyc.
The Time delay - ground high current trip setting programs an intentional time delay for the ground
high current tripping. If set to zero (0), ground high current tripping operates instantaneously.
• This setting is hidden and set to zero (0) if High current trip - ground is set to N.
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