Siemens 7SR18 Solkor - Magnetising Inrush Detector (81 HBL2)

7SR18 Commissioning & Maintenance Guide
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4.5 MAGNETISING INRUSH DETECTOR (81HBL2)
46
BC
46
NPS
(x2)
37
(x2)
49
50
BF
I
L1
(I
A
)
81
HBL
2
37
(x2)
49
50
BF
I
L2
(I
B
)
81
HBL
2
37
(x2)
49
50
BF
I
L3
(I
C
)
81
HBL
2
I
4
(I
G
)
74
T/
CCS
NOTE: The use of some
functions are mutually exclusive
50
(x2)
51
(x2)
50N
(x2)
50
(x2)
50
(x2)
51
(x2)
51
(x2)
51N
(x2)
50G
(x2)
51G
(x2)
60
CTS
50
BF
51c
51c
51c
Figure 4.5-1 Magnetising Inrush Detector
Current Inputs: I
L1
(I
A
), I
L2
(I
B
), I
L3
(I
C
),
Disable:
Map Pickup LED:
Logical operation of the harmonic blocking can be tested by current injection at 100 Hz to cause operation of the
blocking signals.