Settings
54
SEL-351P Quick-Start Installation and User's Guide (Portuguese)
No.
Setting
Default
Range
Incr.
32 High
current lockout -
ground
N Y/N
The
High current lockout - ground
setting enables the following two settings for ground high current
lockout, if set to Y.
High current lockout -
ground
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 lockout -
ground
OFF
OFF, 1.00-79.99 multiples of Min.
trip - ground
0.01
The
High current lockout - ground
(multiples of
Min. trip - ground
) setting determines the
exceeded ground current threshold at which the SEL-351P goes to the lockout state immediately when
tripping.
Example: If
High current lockout - ground
= 45.00 (multiples of
Min. trip - ground
) and
Min.
trip - ground
(No. 6) = 50.00 Amps primary, then the ground current threshold for ground
high current lockout operates at a value equal to:
45.00
•
50.00 Amps primary = 2250.00 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 lockout - ground
is set to N.
Setting
Default
Range
Incr.
Activate high current
lockout - ground
OFF OFF,
1-5
1
The
Activate high current lockout - ground
setting determines when ground high current lockout is
enabled (e.g., if
Activate high current lockout - ground
= 3, then ground high current tripping is
enabled for the third [3rd] trip operation and every following trip operation).
The setting range for
Activate high current lockout - ground
adjusts according to
Operations to
lockout - ground
(e.g., if
Operations to lockout - ground
= 4, then the range for
Activate high
current lockout - ground
is from 1 to 4).
•
This setting is hidden and set to OFF if
High current lockout - ground
is set to N.
Содержание SEL-351P
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