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Stabilising Resistor Specification
Continuous Power Rating
2
P
I
x
R
CONT
s
2
P
0.061
CONT
P
7.4W
CONT
Short Time Power Rating
2
V
Fint
P
1SEC
R
stab
8400
I
Fint
600
3
4
V
(V
Fint
K
3
4
V
(350
Fint
2
1361
P
1SEC
2000
Summary of Relay Settings and Components
87REF-1 Element = Enabled
87REF-1 Setting = 0.061A
87REF-1 Delay = 0s
Rstab = 2000 Ohms, 40W continuous (typical manufacturers data)
Metrosil diameter = 75mm
Metrosil 'C' value = 1000
©2013 Siemens Protection Devices Limited
stab
x
2000
4
V
(V
Where:
Fint
14A
x
R
x
I
)
x
1.3
stab
Fint
x
2000
x
14
1.3
1361V
926W
Figure 2-8
Chapter 7) 7SR23 DAD Applications Guide
3
x
R
x
I
)
x
K
stab
Fint
REF Relay circuit
1.3
Chapter 7 Page 18 of 42
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