Four Corners Intertie Separation Remedial Action Scheme UpgradeCX(s) Applied: B1.3Date: 10/27/2010Location(s): Farmington, New MexicoOffice(s): Bonneville Power Administration
Office of NEPA Policy and Compliance
October 27, 2010
Estimated Read Time min
Four Corners Intertie Separation Remedial Action Scheme Upgrade
CX(s) Applied: B1.3
Date: 10/27/2010
Location(s): Farmington, New Mexico
Office(s): Bonneville Power Administration
CX(s) Applied: B1.3
Date: 10/27/2010
Location(s): Farmington, New Mexico
Office(s): Bonneville Power Administration
Bonneville Power Administration (BPA) proposes to replace the existing two transfer trip units that receive the Four Corners Intertie Separation signals from Dittmer and Munro with two GE N60 universal relays at Arizona Public Service Company?s (APS) Four Corners Substation. A third identical GE N60 unit would be used as maintenance spare. The upgrade is needed to the existing Northeast/Southeast Intertie Separation Remedial Action Scheme (RAS) equipment at APS?s Four Corners Substation to ensure system reliability.