Entec Load Break Switch

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Summary

Load Break Switch in Sectionalizing Applications

Sectionalizer Description

Definition of sectionalizers used with upstream protective devices to isolate faulted sections of distribution lines.

Three Phase Sectionalizer Advantages

Key benefits of sectionalizers including coordination, single-phase damage avoidance, and cost-effectiveness.

Solution to Issue

Addresses repeated recloser cycling causing extensive outages and impacting reliability metrics.

Solution 1: High Fault Isolation

Branch-1 Fault Scenario

Illustrates how a breaker cycles and LBS locks out, keeping the utility feeder energized during a high fault.

Solution 2: PME Protection in High Fault Zone

PME Fault Scenario

Shows breaker cycles and LBS lockout for a PME fault, maintaining utility feeder energization.

Solution 3: Utility Voltage Restraint with Downstream Recloser

Customer Fault Scenario

Describes how voltage restraint blocks LBS count during customer recloser cycles, keeping PME and feeder energized.

Solution 4: Industrial Voltage Restraint with Downstream Recloser

Zone A & B Fault Scenarios

Details fault clearing and voltage restraint effects on LBS and SWD continuity for Zone A and Zone B faults.

Solution 5: PME Protection with Customer Recloser

PME Fault Scenario

Illustrates breaker cycles and LBS lockout for a PME fault, leaving the utility feeder energized.

Solution 6: No Coordination Required

Weak Fault Scenario

Explains how a weak fault, fuse non-coordination, and LBS lockout affect RX2 and the utility feeder.

Solution 7: Series Zone Isolation

Deep Fault Scenario

Describes LBS lockout sequence and zone isolation during a deep fault, keeping Zone-1 and Main Line energized.

Solution 8: Inrush Restraint

Fault Cleared Upstream Scenario

Shows how inrush restraint blocks LBS2 after upstream fault clearing and LBS1 lockout.