Biased Differential; Reference - Siemens 7SR242 Duobias Technical Manual

Transformer protection relay
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2.16 87 Biased Differential

2.16.1 Reference

Parameter
ICT
Multiplier
I
Initial Setting
init
st
I
1
Bias Slope setting
B1
st
I
1
Bias Slope Limit
B1L
nd
I
2
Bias Slope setting
B2
nd
I
2
Bias Slope Type setting
B2T
ts
Delay setting
©2015 Siemens Protection Devices Limited
Chapter 3) 7SR242 Duobias Performance Specification
Value
1.00x
0.1, 0.15... 2 xIn
0.1, 0.15... 0.7 x
1, 2... 20 xIn
1, 1.05... 2 x
Line, Curve
0, 0.005... 1s
Chapter 3 Page 44 of 50

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