Section 3: Supervision Functions; Cb Fail (50Bf); Figure 3-1 Cb Fail - Siemens 7SR21 Manual

Section 3: Supervision Functions

3.1

CB Fail (50BF)

I
L1
(I
A
I
L2
(I
B
I
L3
(I
C
I
4
(I
G
I
5
(I
SEF
V
L1
(V )
A
V
L2
(V )
B
V
L3
(V )
C
V
4
(V )
X
Voltage Inputs:
Current Inputs:
Disable:
Map Pickup LED:
The circuit breaker fail protection time delays are initiated either from:
A binary output mapped as Trip Contact in the OUTPUT CONFIG>BINARY OUTPUT CONFIG menu,
or
A binary input mapped as 50BF Ext Trip in the INPUT CONFIG>INPUT MATRIX menu.
©2010 Siemens Protection Devices Limited
37 50
49
(x2) BF
)
37 50
49
(x2) BF
)
37 50
49
(x2) BF
)
46
46 60
NPS
BC CTS
(x2)
50
BF
)
)
functions are mutually exclusive
27
59
(x4)
27
47
59
(x2)
(x4)
27
59
(x4)
27
59
Optional
79

Figure 3-1 CB Fail

n/a
I (I ), I (I ), I
L1 A L2 B L3
50BF-n - Self Reset
7SR21 & 7SR22 Argus Commissioning and Maintenance
67/ 67/
51V 50 51
(x4) (x4)
67/ 67/
51V 50 51
(x4) (x4)
67/ 67/
51V 50 51
(x4) (x4)
60 67/ 67/
60
CTS- 50N 51N
VTS
I (x4) (x4)
67/ 67/ 81
50G 51G HBL
(x4) (x4) 2G
67/ 67/
64
50S 51S
H
(x4) (x4)
NOTE: The use of some
Note:
Example shows
81
Voltage Config =
(x6)
Van, Vbn, Vcn
59N 74
(x2) TCS
(I ),
C
7SR22
81
HBL 51c
2
81
51c
HBL
2
81
HBL 51c
2
81
HBL
2N
37G
(x2)
37S
(x2)
Chapter 6 Page 57 of 69