Figure 1-2 Function Diagram: 7Sr242N-2Aann-0Ba0 Relay - Siemens 7SR242 Duobias Technical Manual

W1-Ia
W1-Ib
W1-Ic
Ig-1
Ig-2
W2-Ic
W2-Ib
W2-Ia
Figure 1-2
©2015 Siemens Protection Devices Limited
Chapter 1) 7SR242 Duobias Description Of Operation
37 50 50
(x2) BF-1 (x2)
37 50 50
(x2) BF-1 (x2)
37 50 50
(x2) BF-1 (x2)
50N
(x2)
50
37G 50G
BF-1
(x2) (x2)
I4
Each function element
can be assigned to W1
or W2 CT inputs.
NOTE: The use of some
functions are mutually
exclusive
50
37G BF-2 50G
I4
50N
50
37 50
BF-2
50
37 50
BF-2
50
37 50
BF-2
Function Diagram: 7SR242n-2aAnn-0BA0 Relay
7SR242n-2aAn1-0BA0
51 81 81
49
(x2) HBL2 HBL5
51 81 81
49
(x2) HBL2 HBL5
51 81 81
49
(x2) HBL2 HBL5
46 46
51N
BC NPS
(x2)
(x2) (x4)
51G
64H
(x4)
51G 64H
46 46
51N
BC NPS
81 81
51 49
HBL2 HBL5
81
81
51 49 HBL
HBL5
2
81
81
51 49 HBL
HBL5
2
ICT
87BD
87HS ICT
74
CCS
(x6)
74
TCS
(x6)
Chapter 1 Page 11 of 60