Operate And Reset Level; 51Sef Time Delayed Sensitive Earth Fault; Reference - Siemens Argus 7SR21 Technical Manual

2.17 51SEF Time Delayed Sensitive Earth Fault

2.17.1 Reference

Parameter
Is Setting
char Characteristic setting
Tm Time multiplier
t Delay setting
d
t Reset setting
res
Applied current (for
I
operate time)

2.17.2 Operate and Reset Level

Attribute
I Operate level
op
Reset level
Repeatability
Variation
Unrestricted © 2013 Siemens Protection Devices Limited
Value
0.005, 0.006...1 xIn
IEC-NI, -VI, -EI, -LTI;
ANSI-MI, -VI, -EI; DTL
1.0
0.00...20.00 s
DECAYING, 0, 1...60 s
IDMTL 2 to 20xIs
DTL 5 xIs
Value
105 % Is, ± 4 % or ± 1% In
³ 95 % I
± 1 %
£ 5 %
-10 °C to +55 °C
f - 3 Hz
nom
to f + 2 Hz
nom
£ 5 %
harmonics to f
cutoff
7SR21 & 7SR22 Performance Specification
± 4 % or ± 1% In
op
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