7SR21 & 7SR22 Performance Specification
Unrestricted © 2013 Siemens Protection Devices Limited
Page 41 of 68
2.15 51G Time Delayed Measured Earth Fault
2.15.1 Reference
Parameter
Value
Is
Setting
0.005, 0.006… 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
I
Applied current (for
operate time)
IDMTL
2 to 20 x
Is
DTL
5 x
Is
2.15.2 Operate and Reset Level
Attribute
Value
I
op
Operate level
105 %
Is
,
±
4 % or
±
1%
In
Reset level
³
95 %
I
op
Repeatability
±
1 %
Variation
-10 °C to +55 °C
£
5 %
f
nom
- 3 Hz to
f
nom
+ 2 Hz
£
5 %
Содержание Argus 7SR21
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