Siemens 7SR18 Solkor - Measured Earth Fault (50 G,51 G)

7SR18 Commissioning & Maintenance Guide
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of
3.6 MEASURED EARTH FAULT (50G,51G)
Figure 3.6-1 Measured Earth Fault
Current Inputs: I
4
(I
G
)
Disable: 50CBF
Map Pickup LED: 51G-n/50G-n - Self Reset
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.
Measured EF elements can be separated from Derived EF by secondary injection of current through the I
4
input
circuit only.