Specifications

7SR242 Duobias Performance Specification
©2010 Siemens Protection Devices Limited Chapter 3 - Page 30 of 45
2.11 51G Time Delayed Measured Earth Fault
2.11.1 Reference
Parameter Value
Is
Setting 0.005, 0.10… 1.0 xIn
Char
Characteristic setting IEC-NI, -VI, -EI, -LTI; ANSI-MI, -VI, -EI; DTL
Tm
Time Multiplier setting 0.025, 0.05… 1.6
t
d
Delay setting (DTL) 0, 0.01… 20 s
t
res
Reset setting ANSI DECAYING, 0, 1… 60 s
IDMTL 2 to 20 xIs
I
Applied current (for
operate time)
DTL 5 xIs
2.11.2 Operate and Reset Level
Attribute Value
I
op
Operate level
105 % Is, r 4 % or r 1% In
Reset level
t 95 % I
op
Repeatability
r 1 %
-10 °C to +55 °C
d 5 %
Variation
f
nom
- 3 Hz to f
nom
+ 2 Hz
d 5 %