Time Delayed Measured Earth Fault; Reference; Operate And Reset Level - Siemens 7SR224 Technical Manual

2.10 51G Time Delayed Measured Earth Fault

2.10.1 Reference

Parameter
Is Setting
Char Characteristic setting
Tm Time Multiplier setting
t Delay setting (DTL)
d
Reset setting
t
res
Applied current (for
I
operate time)

2.10.2 Operate and Reset Level

Attribute
I Operate level
op
Reset level
Repeatability
-10 °C to +55 °C
Variation
f - 3 Hz to f
nom
©2010 Siemens Protection Devices Limited
Value
0.005, 0.006 ...0.100, 0.105... 1.0 xIn
IEC-NI, -VI, -EI, -LTI;
ANSI-MI, -VI, -EI; DTL
Manufacturer specific curves
See 'Performance Specification Appendix 1'
0.025, 0.05... 1.6
0, 0.01... 20 s
ANSI DECAYING, 0, 1... 60 s
IDMTL 2 to 20 xIs
DTL 5 xIs
Value
105 % Is, ± 4 % or ± 1% In
≥ 95 % I
op
± 1 %
≤ 5 %
≤ 5 %
+ 2 Hz
nom
7SR224 Argus Performance Specification
Chapter 3 Page 28 of 49