sepam 20 user manual - Schneider Electric

Protection functions Setting ranges
Functions Settings Time delays
ANSI 50N/51N or 50G/51G - Earth fault / Sensitive earth fault
Tripping time delay Timer hold
Tripping curve Definite time DT
SIT, LTI, VIT, EIT, UIT (1) DT
RI DT
IEC: SIT/A,LTI/B, VIT/B, EIT/C DT or IDMT
IEEE: MI (D), VI (E), EI (F) DT or IDMT
IAC: I, VI, EI DT or IDMT
Is0 set point 0.1 to 15 In0 Definite time Inst ; 0.05 s to 300 s
0.1 to 1 In0 IDMT 0.1 s to 12.5 s at 10 Is0
Timer hold Definite time (DT ; timer hold) Inst ; 0.05 s to 300 s
IDMT (IDMT ; reset time) 0.5 s to 20 s
ANSI 59 - Overvoltage phase-to-phase
50 to 150 % of Unp 0.05 s to 300 s
ANSI 59N - Neutral voltage displacement
2 to 80 % of Unp 0.05 s to 300 s
ANSI 66 - Starts per hour
Starts per period 1 to 60 Period 1 to 6 hr
Consecutive starts 1 to 60 Time between starts 0 to 90 mn
ANSI 81H - Overfrequency
50 to 53 Hz or 60 to 63 Hz 0.1 s to 300 s
ANSI 81L - Underfrequency
45 to 50 Hz or 55 to 60 Hz 0.1 s to 300 s
ANSI 81R - Rate of change of frequency
0.1 to 10 Hz/s Inst ; 0.15 s to 300 s
(1) Tripping as of 1.2 Is.
PCRED301005EN - 06/2008
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