Siemens 7SR242 - Figure 1-2 Functional Diagram: 7 Sr242 N-2 Aann-0 BA0 Relay

7SR242 Duobias Description Of Operation
©2010 Siemens Protection Devices Limited Chapter 1 Page 10 of 52
I
G1
W1-I
L1
(I
A
)
I
G2
W1-I
L2
(I
B
)
W1-I
L3
(I
C
)
W2-I
L3
(I
C
)
W2-I
L2
(I
B
)
W2-I
L1
(I
A
)
50G
(x2)
51G
(x4)
64H
81
HBL5
81
HBL5
81
HBL5
74
TCS
(x6)
7SR242n-2aAnn-0BA0
81
HBL2
81
HBL2
81
HBL2
87HS
87BD
ICT
ICT
37
(x2)
49
50
(x2)
51
(x2)
50
BF-1
37
(x2)
49
50
(x2)
51
(x2)
50
BF-1
37
(x2)
49
50
(x2)
51
(x2)
50
BF-1
50N
(x2)
51N
(x2)
46
BC
(x2)
37 49
37 49
37 49
50N
50
BF-2
50
BF-2
50
BF-2
46
NPS
51N
51
51
51
50
50
50
50G 51G 64H
81
HBL2
81
HBL
2
81
HBL
2
81
HBL5
81
HBL5
81
HBL5
Each function element
can be assigned to W1
or W2 CT inputs.
NOTE: The use of some
functions are mutually
exclusive
37G
(x2)
50
BF-1
I4
37G
50
BF-2
I4
74
CCS
(x6)
46
BC
46
NPS
(x4)
Figure 1-2 Functional Diagram: 7SR242n-2aAnn-0BA0 Relay