Siemens Argus 7SR22 - Operate and Reset Level; 51 SEF Time Delayed Sensitive Earth Fault; Reference

7SR21 & 7SR22 Performance Specification
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2.17 51SEF Time Delayed Sensitive Earth Fault
2.17.1 Reference
Parameter Value
Is Setting 0.005, 0.006…1 xIn
char Characteristic setting
IEC-NI, -VI, -EI, -LTI;
ANSI-MI, -VI, -EI; DTL
Tm Time multiplier 1.0
t
d
Delay setting 0.00…20.00 s
t
res
Reset setting DECAYING, 0, 1…60 s
I
Applied current (for
operate time)
IDMTL 2 to 20xIs
DTL 5 xIs
2.17.2 Operate and Reset Level
Attribute Value
I
op
Operate level
105 % Is, ± 4 % or ± 1% In
Reset level
³ 95 % I
op
± 4 % or ± 1% In
Repeatability
± 1 %
Variation
-10 °C to +55 °C
£ 5 %
f
nom
- 3 Hz
to f
nom
+ 2 Hz
harmonics to f
cutoff
£ 5 %