Chapter 3) 7SR242 Duobias Performance Specification
©2015 Siemens Protection Devices Limited
Chapter 3 Page 42 of 50
2.14 64H Restricted Earth Fault Protection
2.14.1 Reference
Parameter
Value
I
s
Setting
0.005, 0.010… 0.95 x
In
t
d
Delay setting
0.00, 0.01… 20.0, 20.1… 100.0, 101.…1000, 1010 …
10000 , 10100 … 14400 s
2.14.2 Operate and Reset Level
Attribute
Value
I
op
Operate level
100 %
Is
, 5 % or 1%
xIn
Reset level
95 %
I
op
, 5 % or 0.1%
xIn
Repeatability
1 %
Transient overreach
(X/R 100)
-5 %
Variation
-10 °C to +55 °C
5 %
f
nom
- 3 Hz to
f
nom
+ 2 Hz
5 %
2.14.3 Operate and Reset Time
Attribute
Value
t
basic
Element basic operate time
0 to 2 x
Is
, 40 ms, 10ms
0 to 5 xI
s
, 30 ms, 10ms
t
op
Operate time following delay
t
basic
+
t
d
, 1% or 10ms
Repeatability
1% or 10ms
Overshoot time
< 40 ms
Disengaging time
< 50 ms
2.14.4 Harmonic Rejection
Harmonic Rejection
2
nd
to 15
th
harmonic
40:1 minimum (50/60Hz)
Summary of Contents for 7SR242 Duobias
Page 1: ...Answers for energy 7SR242 Duobias Transformer Protection Relay Reyrolle Protection Devices ...
Page 2: ...2 ...
Page 4: ...4 ...
Page 6: ...6 www siemens com energy ...
Page 318: ... 2015 Siemens Protection Devices Limited Chapter 7 Page 2 of 64 ...
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Page 358: ... 2015 Siemens Protection Devices Limited Chapter 7 Page 42 of 64 ...
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