Schweitzer Engineering Laboratories Inc. announces the high-impedance fault detection in the SEL-651R Advanced Recloser Control. SEL's patented arc sense technology (AST) detects more high-impedance faults than conventional protection for reliable operation of distribution systems.

A high-impedance fault occurs when a conductor contacts a ground surface but does not produce a large fault current. The SEL-651R with AST detects and clears many faults that may not be detected by conventional overcurrent elements. AST detection algorithms also offer enhanced security over existing technology, and dedicated event reports provide information on high-impedance fault activity for event analysis.

Schweitzer Engineering Laboratories

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