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7SR11 & 7SR12 Description Of Operation
IL1
IL2
IL3
I4
VL1
VL2
VL3
Figure 1-9 Functional Diagram of 7SR1205-4_A_ _-_DA0 Relay
Chapter 1 Page 16 of 88
50
37
50
49
51V
AFD
(x2)
BF
(x2)
50
37
50
49
51V
AFD
(x2)
BF
(x2)
50
37
50
49
51V
AFD
(x2)
BF
(x2)
51c
50
81H
37
64H
BF
BL2
27
59
(x4)
27
81
59N
59
47
(x4)
(x2)
(x4)
NOTE:
27
The use of some functions
59
(x4)
are mutually exclusive
7SR1205-4_A12-_DA0
67/
67/
32
55
50
51
(x2)
(x2)
(x4)
(x4)
67/
67/
55
32
46
50
51
(x2)
(x2)
BC
(x4)
(x4)
67/
67/
32
55
50
51
(x2)
(x2)
(x4)
(x4)
67/
67/
60
50N
51N
CTS
(x4)
(x4)
67/50
67/51
32S
SEF
SEF
(x2)
(x4)
(x4)
86
74
74
CCS
TCS
79
(x3)
(x3)
©2017 Siemens Protection Devices Limited
46
NPS
(x2)
81H
BL2
60
VTS
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