Magnetising Inrush Detector (81Hbl); Figure 3-6 Magnetising Inrush Detector - Siemens 7SR21 Manual
Overcurrent relay
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3.6
Magnetising Inrush Detector (81HBL)
Voltage Inputs:
Current Inputs:
Disable:
Map Pickup LED:
Logical operation of the harmonic blocking can be tested by current injection at 100Hz to cause operation of the
blocking signals.
©2010 Siemens Protection Devices Limited
7SR21 & 7SR22 Argus Commissioning and Maintenance
Figure 3-6 Magnetising Inrush Detector
n/a
I
(I
), I
(I
), I
(I
),
L1
A
L2
B
L3
C
Chapter 6 Page 66 of 69
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