Siemens Reyrolle 7SR5 Manual page 418

Functional Tests
9.8 Configuration Tests for Transformer Differential Protection
[lo_7SR5_FunctionalTestsLogicDiagram3, 1, en_US]
Figure 9-3
[lo_7SR5_FunctionalTestsLogicDiagram4, 1, en_US]
Figure 9-4
[lo_7SR5_FunctionalTestsLogicDiagram5, 1, en_US]
Figure 9-5
418
Measurement of Residual Current on a Star-Delta Transformer – Without Neutral-Point Current
Measurement
Residual Current Measurement on a Star-Delta Transformer
Residual-Current Measurement on a Star-Delta Transformer with Stabilizing Winding
Reyrolle 7SR5, Transformer Protection Device, Device Manual
C53000-G7040-C015-1, Edition 11.2019