Today’s LiveWire Spotlight examines TPL-001-5 Draft 4 – which addresses FERC’s concerns regarding a 2011 interpretation of TPL-002-0, R1.3.10 (now incorporated in TPL-004-1). The latest posting removes the P8 contingency added in Draft 3 describing a condition where a single-phase to three-phase Fault migration occurs because of a delay in Fault Clearing (i.e.; a Misoperation).

The fourth draft of TPL-001-5 and its supporting materials have been posted on the NERC website for a 45-day review and concurrent ballot. Clients have until September 14, 2018 to return their comments to the project team and votes on the latest updates.