Siemens Argus 7SR21 - Operate and Reset Level; Operate and Reset Time; 50 SEF Instantaneous Sensitive Earth Fault; Reference

7SR21 & 7SR22 Performance Specification
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2.13 50SEF Instantaneous Sensitive Earth Fault
2.13.1 Reference
Parameter Value
Is Setting 0.005, 0.006… 5.0 xIn
t
d
Delay setting
0.00, 0.01… 20.0, 20.1 .. 100.0, 101.…1000, 1010 …
10000 , 10100 … 14400
I Applied current (for operate time) 5 xIs
2.13.2 Operate and Reset Level
Attribute Value
I
op
Operate level
100 % Is, ± 5 % or ± 1% In
Reset level
95 % I
op
± 5 % or ± 0.1% In
Repeatability
± 1 %
Transient overreach
(X/R £ 100)
£ -5 %
Variation
-10 °C to +55 °C
£ 5 %
f
nom
- 3 Hz to f
nom
+ 2 Hz
harmonics to f
cutoff
£ 5 %
2.13.3 Operate and Reset Time
Attribute Value
t
basic
Element basic operate time
Switched from 0 to 0 to 2x Is: 35 ms, ± 10 ms
Switched from 0 to 0 to 5x Is: 25 ms, ± 10 ms
t
op
Operate time following delay
t
basic
+ t
d
, ± 1 % or ± 10 ms
Repeatability
± 1 % or ± 10 ms
Overshoot time < 40 ms
Disengaging time < 50 ms
Variation f
nom
- 3 Hz to f
nom
+ 2 Hz
£ 5 %