Power System Protection- Relays

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Across
  1. 3. Relay that operates after a specific time delay (Time Relay).
  2. 5. General term for a device that detects fault & trips.
  3. 7. General term for safeguarding electrical systems.
  4. 8. Protection scheme for the entire power system.
  5. 11. Device that disconnects the faulted part from the healthy system.
  6. 12. Relay used in transformers; compares input & output currents.
  7. 13. Relay that trips when current exceeds preset limit.
  8. 14. Relay detecting loss of field in generators.
Down
  1. 1. Gas-actuated relay used for oil-filled transformer protection.
  2. 2. Relay that uses pilot wires for line protection.
  3. 4. Relay used in rotating machines to prevent reverse power flow
  4. 6. Relay used for long transmission line protection.
  5. 9. Relay that responds to change in system frequency.
  6. 10. Relay responding to thermal heating/overheating.
  7. 12. Relay based on directional power flow.