Siemens Argus 7SR21 - Operate and Reset Level; Time Delayed Measured Earth Fault; Reference

7SR21 & 7SR22 Performance Specification
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2.15 51G Time Delayed Measured Earth Fault
2.15.1 Reference
Parameter Value
Is Setting 0.005, 0.006… 1.0 xIn
Char Characteristic setting
IEC-NI, -VI, -EI, -LTI;
ANSI-MI, -VI, -EI; DTL
Tm Time Multiplier setting 0.025, 0.05… 1.6
t
d
Delay setting (DTL) 0, 0.01… 20 s
t
res
Reset setting ANSI DECAYING, 0, 1… 60 s
I
Applied current (for
operate time)
IDMTL 2 to 20 xIs
DTL 5 xIs
2.15.2 Operate and Reset Level
Attribute Value
I
op
Operate level
105 % Is, ± 4 % or ± 1% In
Reset level
³ 95 % I
op
Repeatability
± 1 %
Variation
-10 °C to +55 °C
£ 5 %
f
nom
- 3 Hz to f
nom
+ 2 Hz
£ 5 %