7SA511 Line Protection RelayReference A

Figure A-18. Power Swing

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Figure A-19.Pickup Characteristic for the Detection of Power Swings

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Figure A-20. Permissive Underreach Transfer Trip With Fault Detection

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Figure A-21.Permissive Underreach Transfer Trip With Zone Z1B

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Figure A-22.Permissive Overreach Transfer Trip With Zone Z1B

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Figure A-23. Permissive Overreach Transfer Trip With Fault Detection Zone

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Figure A-24.POTT Unblock Scheme With Zone Z1B

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Figure A-25. Unblocking Logic

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Figure A-26.Generating the Communications Failure (Fault) Signal F

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Figure A-27. POTT Unblock With Fault Detection Zone

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Figure A-28. Z1B Blocking

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Figure A-29. Z1B Blocking via Pilot Wires

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Figure A-30.Reverse Interlocking Scheme With Distance Zones

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Figure A-31. Echo Keying Function

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Figure A-32. Transient Blocking With Release Scheme

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Figure A-33.Directional Ground Fault Measurement Characteristic for cos f

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Figure A-34.Faulted Line Location in a Radial System

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Figure A-35.Faulted Line Location in a Meshed System

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Figure A-36.Directional Ground Fault Protection With Nondirectional Backup

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Figure A-37.Directional Comparison Ground Fault Protection

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Figure A-38. Automatic Reclose Sequence

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Figure A-39.Zone Reach Control With the Automatic Reclose Function

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Figure A-40.Multiple Faults on a Parallel Line

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Figure A-41. Example of Connections to an External Automatic Reclose System

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Figure A-42.Example of External Control of Internal Automatic Reclose

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Figure A-43.Example of Connections for Dual Automatic Reclose

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July 27, 1995

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Image 183
Siemens 7SA511 manual Figure A-18. Power Swing