Directional Y0 Stage With G0 Or B0 Measurement; Description - Siemens 7SJ82 Manual

Protection and Automation Functions
6.15 Sensitive Ground-Fault Detection

Directional Y0 Stage with G0 or B0 Measurement

6.15.8
6.15.8.1

Description

[LoY0G0B0-300713-01, 5, en_US]
Figure 6-136
Measured Value V0, Method of Measurement
The device can measure the residual voltage at the broken-delta winding. The measured voltage VN is
converted to a value with reference to the zero-sequence voltage V0. If the residual voltage is not available to
the device as a measurand, the zero-sequence voltage V0 is calculated from the measured phase-to-ground
voltages VA, VB, and VC using the definition equation.
592
Logic Diagram of the Directional Y0 Stage with G0 or B0 Measurement
SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017