Siemens SICAM Manual page 31

[lo_sfcm_phase_fault_indication, 2, en_US]
Figure 4-1
[lo_ground_fault_reset, 3, en_US]
Figure 4-2
For isolated ground:
I (Watt-metric) = I
N
For resonant ground:
I (Watt-metric) = I
N
For more information about ground-fault detection by watt-metric method, refer to chapter
Fault Detection with Cos φ/Sin φ Measurement
NOTE
i
i
For solid ground or if I
NOTE
i
i
For solid ground or if V
ground fault.
SICAM, Feeder Condition Monitor, Manual
E50417-H8940-C580-A4, Edition 03.2019
Logic Diagram for Phase-Fault Indication
Logic Diagram for Ground-Fault Detection
⋅ sin φ
N
⋅ cos φ
N
is set to 0, I is disabled and only I
dir dir
is set to 0, V is disabled and only I
NG NG
is used for detecting the ground fault.
N
/I (Watt-metric) is used for detecting the
N N
Device Functions
4.1 Description
4.1.20 Ground-
31