Protection Packages. The existing primary and backup electromechanical line relays for Line 73 shall be replaced with digital relays coinciding with the protection at the ▇▇▇▇▇▇▇▇ Road Station. The ‘A’ package will consist of an ErlPhase LPRO relay configured for a DCUB scheme using RFL 9780 FSK PLC, and the ‘B’ package will be a SEL 311C relay configured for a POTT scheme using mirrored bits via RFL IMUX SONET equipment over microwave. Reverse looking elements in the ‘B’ package will also provide backup bus protection. Existing relay panels will be reused. Redundant single channel DTT receive schemes shall be added for breaker failure protection at the ▇▇▇▇▇▇▇▇ Road Station using SEL-351-6 relays (breaker failure at ▇▇▇▇▇▇▇▇ Road Station will trip Dunkirk breaker R1402). The existing AC Reclosing relay located on the line relay panels will be replaced with a SEL-351-6 relay to allow the drive to lockout functionality for DTT receive implementation. • Controls and Integration Due to the age of the existing RTU, all new alarm points will need to be hardwired to status cards in the RTU because DNP communication with the new relaying will not be available. A new SEL-2032 will be added to provide engineering access to the new relays. An RE-43A/M control handle capable of remote operation will be provided for the R1402 breaker to allow for the automatic reclosing function to be enabled or disabled.
Appears in 3 contracts
Sources: Interconnection Agreement, Interconnection Agreement, Interconnection Agreement