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2.3
Measured Earth fault (50G, 51G)
Voltage Inputs:
Current Inputs:
Disable:
Map Pickup LED:
Other protection functions may overlap with these functions during testing, it may be useful to disable some
functions to avoid ambiguity. Derived EF, Measured EF & Restricted EF protections can be Enabled/Disabled
individually or as groups in the 'Function Config' menu.
These elements can be allocated to I
the correct input.
Measured EF elements can be separated from Derived EF by secondary injection of current through the I
input circuit only.
©2010 Siemens Protection Devices Limited
7SR242 Duobias Commissioning & Maintenance Guide
Figure 2-5 Measured Earth Fault
None
I
I
G1 ,
G2
50BF, 64H
51G-n/50G-n - Self Reset
or I
current inputs by relay settings, ensure that current is injected on
G1
G2
or I
G1
G2
Chapter 6 Page 24 of 57
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