Operate And Reset Level; Operate And Reset Time; 50Sef Instantaneous Sensitive Earth Fault; Reference - Siemens Argus 7SR21 Technical Manual

2.13 50SEF Instantaneous Sensitive Earth Fault

2.13.1 Reference

Parameter
Is Setting
t Delay setting
d
I Applied current (for operate time)

2.13.2 Operate and Reset Level

Attribute
I Operate level
op
Reset level
Repeatability
Transient overreach
(X/R £ 100)
Variation

2.13.3 Operate and Reset Time

Attribute
t Element basic operate time
basic
t Operate time following delay
op
Repeatability
Overshoot time
Disengaging time
Variation
Unrestricted © 2013 Siemens Protection Devices Limited
-10 °C to +55 °C
f - 3 Hz to f + 2 Hz
nom nom
harmonics to f
cutoff
f - 3 Hz to f + 2 Hz
nom nom
7SR21 & 7SR22 Performance Specification
Value
0.005, 0.006... 5.0 xIn
0.00, 0.01... 20.0, 20.1 .. 100.0, 101....1000, 1010 ...
10000 , 10100 ... 14400
5 xIs
Value
100 % Is, ± 5 % or ± 1% In
± 5 % or ± 0.1% In
95 % I
op
± 1 %
£ -5 %
£ 5 %
£ 5 %
Value
Switched from 0 to 0 to 2x Is: 35 ms, ± 10 ms
Switched from 0 to 0 to 5x Is: 25 ms, ± 10 ms
, ± 1 % or ± 10 ms
t + t
basic d
± 1 % or ± 10 ms
< 40 ms
< 50 ms
£ 5 %
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