Siemens 7SR12 Argus - 50 SEF Instantaneous Sensitive Earth Fault; Reference; Operate and Reset Level; Operate and Reset Time

7SR11 & 7SR12 Performance Specification
©2017 Siemens Protection Devices Limited Chapter 3 Page 30 of 56
2.11 50SEF Instantaneous Sensitive Earth Fault
2.11.1 Reference
Parameter Value
Is
Setting
0.005, 0.006,0.010,0.105,… 5.0 xIn
t
d
Delay setting
0.00, 0.01…20.00, 20.10… 100, 101… 1000, 1010…
10000, 10100… 14400 s
2.11.2 Operate and Reset Level
Attribute Value
I
op
Operate level
100 % Is, ± 5 % or ± 1% In
Reset level
≥ 95 % I
op
or I
op
- 0.1% In
Repeatability
± 1 %
Transient overreach
(X/R ≤ 100)
≤ -5 %
Variation
-10 °C to +55 °C
≤ 5 %
f
nom
± 5 %
harmonics to f
cutoff
≤ 5 %
2.11.3 Operate and Reset Time
Attribute Value
t
basic
Element basic
operate time
0 to 2 xIs: 35 ms, ± 10ms
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
± 5 %
≤ 5 %