Entec Load Break Switch Application Manual Download

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Application Guide

Three Phase Sectionalizer

www.Entec-USA.com

Solution 7

SERIES ZONE ISOLATION

Deep Fault: RX1 cycles, LBS2 locks before LBS1, Zone-2 isolated … Zone-1 and Main Line
remain energized

Solution 8

INRUSH RESTRAINT

Fault Cleared Upstream: RX cycles and LBS1 locks out. Inrush Restraint blocks LBS2 … Utility
Feeder and LBS2 remain energized

SEL

is a registered trademark of Schweitzer Engineering Laboratories, Inc. (SEL)

Summary of Contents for Load Break Switch

Page 1: ...Version 1 0 Application Guide www Entec USA com Date June 2018 Load Break Switch Three Phase Sectionalizer With SEL 751 Patent Pending Control Technology ...

Page 3: ... Entec USA com Solution 1 HIGH FAULT ISOLATION Branch 1 Fault 52 Breaker cycles and LBS locks out Utility Feeder remains energized Solution 2 PME PROTECTION IN HIGH FAULT ZONE PME Fault 52 Breaker cycles LBS locks out Utility Feeder remains energized ...

Page 4: ...s to clear fault and locks out Voltage Restraint blocks LBS count PME and Utility Feeder remain energized Solution 4 INDUSTRIAL VOLTAGE RESTRAINT WITH DOWNSTREAM RECLOSER Zone A Fault RX1 cycles to clear fault and LBS locks out critical SWD continues Zone B Fault RX2 cycles to clear fault Voltage restraint blocks LBS count RX2 locks out and critical SWD continues ...

Page 5: ...com Solution 5 PME PROTECTION WITH CUSTOMER RECLOSER PME Fault 52 Breaker cycles LBS locks out Utility Feeder remains energized Solution 6 NO COORDINATION REQUIRED Weak Fault Fuse won t coordinate RX2 cycles LBS2 locks out RX2 and Utility Feeder remain energized ...

Page 6: ...1 cycles LBS2 locks before LBS1 Zone 2 isolated Zone 1 and Main Line remain energized Solution 8 INRUSH RESTRAINT Fault Cleared Upstream RX cycles and LBS1 locks out Inrush Restraint blocks LBS2 Utility Feeder and LBS2 remain energized SEL is a registered trademark of Schweitzer Engineering Laboratories Inc SEL ...