Restricted Earth Fault Protection; Reference; Operate And Reset Level; Operate And Reset Time - Siemens 7SR224 Technical Manual

2.14 64H Restricted Earth Fault Protection

2.14.1 Reference

Parameter
Is Setting
t Delay setting
d

2.14.2 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

2.14.3 Operate and Reset Time

Attribute
t Element basic operate time
basic
t Operate time following delay
op
Repeatability
Overshoot time
Disengaging time
©2010 Siemens Protection Devices Limited
Value
0.005, 0.006 ..0.100, 0.105... 0.95 xIn
0.00, 0.01... 20.0, 20.1... 100.0, 101....1000, 1010 ...
10000 , 10100 ... 14400 s
Value
100 % Is, ± 5 % or ±1% xIn
95 % I
± 1 %
≤ -5 %
≤ 5 %
+ 2 Hz ≤ 5 %
- 3 Hz to f
nom
Value
0 to 2 xIs, 40 ms, ± 10ms
0 to 5 xIs, 30 ms, ± 10ms
t + t
basic
± 1% or ± 10ms
< 40 ms
< 50 ms
7SR224 Argus Performance Specification
, ± 5 % or ±0.1% xIn
op
, ± 1% or ± 10ms
d
Chapter 3 Page 38 of 49