FLISR is Re-triggering on Single-Phase Trips When Another Phase has Already Locked Out (Doc ID 2853100.1)

Last updated on MARCH 02, 2022

Applies to:

Symptoms

On : 2.4.0.1.0 version, Web Workspace

FLISR is re-triggering on non three-phase trips when another phase has already locked out.

It is expected that if B and C phase lock out and FLISR fails to solve and then A phase locks out, FLISR should not attempt to solve.

How to Repeat

1. Set FLISR_SINGLE_PHASE_MODE "Rule Value 2" to "1"
2. Set FLISR_VOLT_LOSS_THRESHOLDS "Rule Value 1" to "disabled"
3. Restart services
4. Set SCADA measurements to OPEN and Indicate a fault (FI) on a single-phase of a breaker.
5. Wait 5 seconds and set the Phase Lockout (PL) on the same phase of step 1. for that device.
6. Wait 75 seconds so FLISR can run and finish the work.
7. Set SCADA measurements to OPEN and Indicate a fault (FI) on a a different single-phase of the same breaker.
8. Wait 5 seconds and set the Phase Lockout (PL) on the same phase of step 4. for that device.
9. Observe NO duplicate messages on FLISR event shown on Work Agenda.

Changes

Cause

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