Figure 10 Through Fault Rf Mode, Positive Half Cycle - Siemens 7PG21 Solkor Rf Technical Manual

R a
A
+
-
+ O
-
D5
W
A
O
W
If the condition of zero pilots is then considered for Solkor Rf (i.e. with 1000 ohms padding in each relay), the
circuit and voltage distribution are as shown in Figure 10 & Figure
as obtained in Figure 8 & Figure 9.
©2011 Siemens Protection Devices Limited
R p
B
D3
D7
X
B
X

Figure 10 Through fault Rf mode, positive half cycle

Figure 11 Through fault Rf mode, positive half cycle
7PG21 Solkor Rf Description of Operation
C
D2
D4
D8
Y
R a
C
Y
11. This shows that the same bias voltages are
D
-
+
-
P
+
Z
Z
P
D
Chapter 1 Page 10 of 13