50Sef Instantaneous Sensitive Earth Fault; Reference; Operate And Reset Level; Operate And Reset Time - Siemens 7SR224 Technical Manual

2.8

50SEF Instantaneous Sensitive Earth Fault

2.8.1

Reference

Parameter
Setting
Is
t Delay setting
d
I Applied current (for operate time)
2.8.2

Operate and Reset Level

Attribute
I Operate level
op
Reset level
Repeatability
Transient overreach
(X/R ≤ 100)
-10 °C to +55 °C
Variation
f
nom
harmonics to f
2.8.3

Operate and Reset Time

Attribute
Element basic
t
basic
operate time
t Operate time following delay
op
Repeatability
Overshoot time
Disengaging time
Variation f
nom
©2010 Siemens Protection Devices Limited
Value
0.005, 0.006 ...0.1, 0.105 .. 5 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
≥ 95 % I
± 1 %
≤ -5 %
≤ 5 %
- 3 Hz to f + 2 Hz
nom
≤ 5 %
cutoff
Value
0 to 2 xIs: 35 ms, ± 10ms
0 to 5 xIs: 25 ms, ± 10ms
t + t
basic
± 1 % or ± 10ms
< 40 ms
< 50 ms
≤ 5 %
- 3 Hz to f + 2 Hz
nom
7SR224 Argus Performance Specification
± 5 % or ± 1% In
op
, ± 1 % or ± 10ms
d
Chapter 3 Page 25 of 49