©2015 Siemens Protection Devices Limited
Chapter 7 Page 17 of 64
Summary of Required Settings
CT/VT CONFIG >
W1 Phase Input
1A
W1 Phase CT Ratio
400:1
W2 Phase Input
1A
W2 Phase CT Ratio
1600:1
FUNCTION CONFIG>
Gn Differential
Enabled
Gn Inrush Detector
Enabled
DIFFERENTIAL PROT’N >
Gn W1 ICT Multiplier
1.02
Gn W1 ICT Connection
Yd11
Gn W2 ICT Multiplier
1.06
Gn W2 ICT Connection
Yy0
(Note that the above settings produce ICT
OUT
= 1.00)
DIFFERENTIAL PROT’N > 87BD >
Gn 87 BD Element
Enabled
Gn 87BD Initial:
0.3 x In
(0.3 x ICT
OUT
)
Gn 87BD 1st Bias Slope:
0.3x
(OLTC = +10% to -20%)
Gn 87BD 1st Bias Slope Limit:
4 x In
(1/0.14 x 0.5 = 3.6 x ICT
OUT
)
Gn 87BD 2nd Bias Slope Type:
Line
(Default value)
Gn 87BD 2nd Bias Slope:
1.5x
(Default value)
Gn 87BD Delay:
0.005s
Gn 87BD Inrush Action:
Inhibit
Gn 87BD Overfluxing Action:
Off
DIFFERENTIAL PROT’N > 87HS >
Gn 87HS Element
Enabled
Gn 87HS Setting:
8 x In
(> I
3PH
THRU FAULT
i.e. 1/0.14 = 7.14 x ICT
OUT
)
Gn 87HS Delay:
0.005s
Gn 87HS Inrush Action:
Off
Gn 87HS Overfluxing Action:
Off
SUPERVISION > INRUSH DETECTOR >
Gn81HBL2 Element
Enabled
Gn 81HBL2 Bias
Cross
(Default value)
Gn 81HBL2 Setting
0.2 x I
(Default value)
OUTPUT CONFIG>OUTPUT MATRIX>
87BD
BOn, Ln
87HS
BOn, Ln
OUTPUT CONFIG>BINARY OUTPUT CONFIG>
CB1 Trip Contacts
BOn
CB2 Trip Contacts
BOn
Summary of Contents for 7SR242 Duobias
Page 1: ...Answers for energy 7SR242 Duobias Transformer Protection Relay Reyrolle Protection Devices ...
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