Siemens Argus 7SR21 - Operate and Reset Level; Operate and Reset Time; Instantaneous Overcurrent; Reference

7SR21 & 7SR22 Performance Specification
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2.10 50 Instantaneous Overcurrent
2.10.1 Reference
Parameter Value
Is Setting 0.05, 0.06… 25, 25.5… 50 xIn
i Applied Current (for operate time)
Current switched from below Is to 2x Is
Current switched from below Is to 5x Is
t
d
Delay setting
0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010…
10000, 10100… 14400 s
2.10.2 Operate and Reset Level
Attribute Value
I
op
Operate level
100 % Is, ± 5 % or ± 1% In
Reset level
³ 95 % I
op
Repeatability
± 1 %
Transient overreach
(X/R £ 100)
£ -5 %
Variation
-10 °C to +55 °C
£ 5 %
f
nom
- 3 Hz to f
nom
+ 2 Hz
£ 5 %
2.10.3 Operate and Reset Time
Attribute Value
t
basic
Element basic operate time
Switched from 0 to 2x Is: 40 ms, ± 10 ms
Switched from 0 to 5x Is: 30 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