Phase overcurrent The overcurrent element shall be set greater than 115% of the supervisory element calculated current derived from: (50) associated – (1) Real Power output 100% of the aggregate generation gross – 0.85 per unit of the line nominal with current-based, 15a MW reported to the Transmission Planner, and voltage (2) Reactive Power output 120% of the aggregate generation – schemes MW value, derived from the generator nameplate MVA rating at Elements that where the scheme is rated power factor connect the GSU capable of tripping transformer(s) to the OR for loss of Transmission system communications that are used installed on the exclusively to export high-side of the energy directly from GSU transformeror a BES generating unit phase time The overcurrent element shall be set greater than 115% of the or generating plant. overcurrent relay calculated current derived from: Simulated line voltage coincident Elements may also (51) installed on – with the highest Reactive Power (1) Real Power output 100% of the aggregate generation gross – supply generating the high-side of the 15b output achieved during field-forcing MW reported to the Transmission Planner, and plant loads. GSU transformer in response to a 0.85 per unit nominal to (2) Reactive Power output of the aggregate generation –100% voltage prior to field-forcing synchronous maximum gross Mvar output during field-forcing as determined If the relay is generators by simulation installed on the generator-side of the GSU transformer use Option 8 The same application continues on the next page with a different relay type The overcurrent element shall be set greater than 115% of the Elements that Phase directional calculated current derived from: connect the GSU overcurrent (1) Real Power output 100% of the aggregate generation gross transformer(s) to the supervisory element – 0.85 per unit of the line nominal 16a MW reported to the Transmission Planner, and Transmission system (67) associated – voltage that are used with current-based, (2) Reactive Power output 120% of the aggregate generation – exclusively to export MW value, derived from the generator nameplate MVA rating at energy directly from schemes rated power factor
Elements that connect the GSU transformer(s) to the Transmission system that are used exclusively to export energy directly from a BES generating unit or generating plant. Elements may also supply generating plant loads. to synchronous generators Phase overcurrent supervisory element (50) – associated with current-based, schemes where the scheme is capable of tripping for loss of communications installed on the high-side of the GSU transformeror phase time overcurrent relay (51) – installed on the high-side of the GSU transformer If the relay is installed on the generator-side of the GSU transformer use Option 8 15a 0.85 per unit of the line nominal voltage The overcurrent element shall be set greater than 115% of the calculated current derived from: (1) Real Power output – 100% of the aggregate generation gross MW reported to the Transmission Planner, and (2) Reactive Power output – 120% of the aggregate generation MW value, derived from the generator nameplate MVA rating at rated power factor OR 15b Simulated line voltage coincident with the highest Reactive Power output achieved during field-forcing in response to a 0.85 per unit nominal voltage prior to field-forcing The overcurrent element shall be set greater than 115% of the calculated current derived from: (1) Real Power output – 100% of the aggregate generation gross MW reported to the Transmission Planner, and (2) Reactive Power output –100% of the aggregate generation maximum gross Mvar output during field-forcing as determined by simulation The same application continues on the next page with a different relay type Elements that connect the GSU transformer(s) to the Transmission system that are used exclusively to export energy directly from Phase directional overcurrent supervisory element (67) – associated with current-based, schemes 16a 0.85 per unit of the line nominal voltage The overcurrent element shall be set greater than 115% of the calculated current derived from: (1) Real Power output – 100% of the aggregate generation gross MW reported to the Transmission Planner, and (2) Reactive Power output – 120% of the aggregate generation MW value, derived from the generator nameplate MVA rating at rated power factor