Time Delayed Derived Earth Fault; Reference; Operate And Reset Level - Siemens 7SR242 Duobias Technical Manual

2.11 51N Time Delayed Derived Earth Fault

2.11.1 Reference

Parameter
Is Setting
char Characteristic setting
Tm Time Multiplier setting
t Delay setting
d
t Reset setting
res

2.11.2 Operate and Reset Level

Attribute
I Operate level
op
Reset level
Repeatability
Variation
©2015 Siemens Protection Devices Limited
-10 °C to +55 °C
f - 3 Hz to f + 2 Hz
nom nom
Chapter 3) 7SR242 Duobias Performance Specification
Value
0.05, 0.1... 2.5 xIn
IEC-NI, -VI, -EI, -LTI; ANSI-MI, -VI, -EI; DTL
0.025, 0.030... 1.6, 1.7... 5, 6... 100
0, 0.01... 20 s
ANSI DECAYING, 0, 1... 60 s
Value
105 % Is, 4 % or 1% In
95 % I
op
1 %
5 %
5 %
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