Inrush-Current Detection - Siemens 7SC80 Manual

If the function detects a broken conductor, it generates a phase-specific indication, for example
detect. Ia or 46BC detect. Va . The indication can be sent after a delay time. The delay time can be set.
The following logic diagram shows the functionality of broken conductor detection.
[7sc80_leiterbrucherkenn-16012013, 1, en_US]
Figure 2-70
2.12.1.6

Inrush-Current Detection

When using the 7SC80 multifunctional protection with control to protect a transformer feeder, for example,
large inrush currents must be expected when energizing the transformer. These inrush currents can be several
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
Logic of the Broken Conductor Detection for Current and Voltage Connections
Functions
2.12 Monitoring Functions
46BC
231