Determination Of A Ground Fault With The Pulse-Location Detection Mechanism - Siemens SICAM Manual

Device Functions
4.1 Description
Table 4-9
I Range
dir
0
0.2 A to 30 A
NOTE
i
i
In the solidly grounded system, set the I
Determination of a Ground Fault with the Pulse-Location Detection
4.1.21
Mechanism
The Pulse-location detection mechanism detects a faulty feeder during a permanent ground fault in
overcompensated systems. The Pulse-location detection mechanism is applicable for resonanlt-grounded
systems only and not applicable to the undercompensated systems.
Figure 4-15 shows a simplified network with the pulse-location detection mechanism. The pulse pattern in the
ground current I
•
When the capacitor is switched on, an additional capacitive ground current is generated and the ground-
current compensation changes.
•
When the capacitor is switched off, the additional capacitive ground current no longer exists and the
ground-current compensation returns to the normal state.
46
Ground-Fault Detection with Cos φ/Sin φ Measurement Method Range
Status
Vector method is enabled
Ground-fault detection with cos φ/sin φ measurement method is enabled
dir
is generated by switching on and off a capacitor in parallel to the arc-suppression coil:
N
parameter to 0.
SICAM, Feeder Condition Monitor, Manual
E50417-H8940-C580-A4, Edition 03.2019