R-013

Protection relay coordination study rework

ProposedSubstation UpgradeIntegrationOwner: R. Kimura

Pre-MitigationModerate

$135K

Expected monetary value

Score 6.0

45% likely

ResidualModerate

$104K

Expected monetary value

Score 6.0

40% likely

Mitigation Effect

$31K

EMV reduction from response plan

Mitigation cost $30K20% effective

Cause (because of)

Late changes to system topology

Uncertain Event (there is a risk that)

Coordination study must be redone after design change

Consequence (which would lead to)

Engineering rework and possible field re-settings

Root Cause

Late changes to system topology

Trigger / Threshold

Topology change approved after study freeze

Early Warning Indicator

Topology change approved after study freeze

Assumptions

Baseline assumptions per approved project execution plan.