Siemens Argus 7SR21 - 37 SEF Undercurrent; Operate and Reset Level; Reference

7SR21 & 7SR22 Performance Specification
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2.6 37G & 37SEF Undercurrent
2.6.1 Reference
Parameter Value
Is Setting 0.005, 0.10…5.0 xIn
t
d
Delay setting
0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010…
10000, 10100… 14400 s
2.6.2 Operate and Reset Level
Attribute Value
I
op
Operate level
100 % Is, ± 5 % or ± 1% In
Reset level
£ 105 % I
op
or I
op
± 0.1 % In
Repeatability
± 1 %
Variation
-10 °C to +55 °C
£ 5 %
f
nom
- 3 Hz to f
nom
+ 2 Hz
£ 5 %
2.6.3 Operate and Reset Time
Attribute Value
t
basic
Element basic operate time
1.1 to 0.5 xIs: 35 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 < 60 ms