46BC Broken Conductor Detection
Overview of Functions
The Broken Conductor Detection function is used to:
•
Detect open circuit primary conductors on 1 or 2 phases
•
Provide an alarm for indication purposes
Structure of the Function
The broken conductor detection function element has group dependent settings. These settings can be
different in each settings group – group numbers (Gn) 1 to 4.
This function corresponds to the logical node A46BCPTOC* in IEC 61850.
The function monitors the primary system using the 3 phase current inputs e.g. CT1/2/3. The fundamental
frequency component is measured from processing of the measured current samples.
The broken conductor in a 3 phase system is detected by a high the ratio of the negative phase sequence
(NPS) current level to positive phase sequence (PPS) current level
5.8
5.8.1
5.8.2
Protection and Automation Functions
5.8 46BC Broken Conductor Detection
190 Reyrolle 7SR5, Overcurrent Protection Device, Device Manual
C53000-G7040-C014-1, Edition 11.2019
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