Ground-Fault Direction For Solidly Grounded System - Siemens SICAM Manual

Device Functions
4.1 Description
[dw_sfcm-grndflt-iso, 1, en_US]
Figure 4-12
NOTE
i
i
The undetermined area for the device MLFB 6MD2321-1AA00-1AA0 is 10° and the respective angles
change accordingly.
The undetermined area for the device MLFB 6MD2322-1AA00-1AA0 is 20° and the respective angles
change accordingly.
4.1.19

Ground-Fault Direction for Solidly Grounded System

The solidly grounded system is a common system arrangement in which the neutral is solidly connected to the
ground. For the solid-grounded connection, the neutral-point displacement voltage is sufficient to measure
and determine the directional information. This results in determining the ground-fault direction based on the
rotation angle of the reference vector.
[dw_sfcm-grndflt-sol, 1, en_US]
Figure 4-13
44
Directional Ground Fault (Isolated Grounded) for Vector Method
Ground-Fault Direction for Solidly Grounded System
SICAM, Feeder Condition Monitor, Manual
E50417-H8940-C580-A4, Edition 03.2019