Siemens 7SJ85 - Directional Testing for Isolated or Resonant-Grounded Systems

[ConnPolarit1_diagram, 1, en_US]
Figure 11-1 Polarity Testing, Example with Current Transformers Configured in a Holmgreen-Connection
and VTs with Broken-Delta Connection
[ConnPolarit2_201507, 1, en_US]
Figure 11-2 Polarity Testing, Example with Current Transformers Configured in a Holmgreen-Connection
and VTs with Star Connection
Directional Testing for Isolated or Resonant-Grounded Systems
Primary Test
The primary test is used for the evaluation of the correct polarity of the transformer connections for the deter-
mination of the ground-fault direction.
11.3.3
Functional Tests
11.3 Direction Test of Ground Quantities for Directional Ground-Fault Functions
SIPROTEC 5, Overcurrent Protection, Manual 1375
C53000-G5040-C017-8, Edition 07.2017