Siemens 7SR224 - 50 SEF Instantaneous Sensitive Earth Fault; Reference; Operate and Reset Level; Operate and Reset Time

7SR224 Argus Performance Specification
2.8 50SEF Instantaneous Sensitive Earth Fault
2.8.1 Reference
Parameter Value
Is
Setting 0.005, 0.006 …0.1, 0.105 .. 5 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
2.8.2 Operate and Reset Level
Attribute Value
I
op
Operate level
100 % Is, ± 5 % or ± 1% In
Reset level
≥ 95 % I
op
± 5 % or ± 1% In
Repeatability
± 1 %
Transient overreach
(X/R ≤ 100)
≤ -5 %
-10 °C to +55 °C
≤ 5 %
Variation
f
nom
- 3 Hz to f
nom
+ 2 Hz
harmonics to f
cutoff
≤ 5 %
2.8.3 Operate and Reset Time
Attribute Value
0 to 2 xIs: 35 ms, ± 10ms
t
basic
Element basic
operate time
0 to 5 xIs: 25 ms, ± 10ms
t
op
Operate time following delay
t
basic
+ t
d
, ± 1 % or ± 10ms
Repeatability
± 1 % or ± 10ms
Overshoot time < 40 ms
Disengaging time < 50 ms
Variation f
nom
- 3 Hz to f
nom
+ 2 Hz
≤ 5 %
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