Settings
SEL-351P Quick-Start Installation and User's Guide (Portuguese) 41
No. Setting Default Range Incr.
7 Min. trip - SEF OFF OFF, 1.00-299.99 Amps primary 0.01
The Min. trip - SEF setting determines the minimum sensitive earth fault threshold for overcurrent
detection set in primary Amps.
The displayed Amps primary setting range for Min. trip - SEF is calculated by multiplying the effective Amps
secondary range [0.005 to 1.500] by the CT Ratio (No. 3) [200.0]:
(0.005 to 1.500) • 200.0 = 1.00 to 300.00 range (Amps primary)
If the CT Ratio setting changes, the displayed Amps primary setting range for Min. trip - ground changes
accordingly. Due to processor calculations and rounding techniques, displayed range numbers may appear
slightly different than expected (e.g., 299.99 instead of 300.00).
• WARNING: If Min. trip - phase (No. 5), Min. trip - ground (No. 6), and Min. trip - SEF (No. 7)
are all set to OFF, then overcurrent protection and reclosing are disabled.
• WARNING: If Min. trip - SEF is set to OFF, then the following settings are all hidden and set to zero
(0) and OFF, respectively:
Time delay - SEF (No. 12)
Operations to lockout - SEF (No. 17)
No. Setting Default Range Incr.
8 Fast curve - phase A OFF, U1-U5, C1-C5, recloser or user curve
The Fast curve - phase setting selects the time-overcurrent curve for phase fast curve tripping. Curve
designations are provided in
Table 6 and Table 7.
• This setting is hidden and set to OFF if Min. trip - phase (No. 5) is set to OFF.
• If Fast curve - phase is programmed with a US (U1-U5) or IEC (C1-C5) curve, enter the following
two settings:
Setting Default Range Incr.
Time-dial - phase fast curve 1.00 0.50 - 15.00 for US curves U1-U5
0.05 - 1.00 for IEC curves C1-C5
0.01
0.01
The Time-dial - phase fast curve setting shifts the US or IEC curve in time by the entered
multiplier.
• This setting is hidden and nonoperative if Fast curve - phase is programmed with a recloser or
user curve.
Setting Default Range Incr.
EM reset - phase fast curve N Y/N
The EM reset - phase fast curve setting enables the electromechanical reset emulation for the US or
IEC curve, if set to Y.
• This setting is usually set to N, except for special applications.
• This setting is hidden and set to N if Fast curve - phase is programmed with a recloser or user
curve.
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