- Course 140.
- 1 week.
- 3.6 CEU.
Course participants learn the basics of transmission line protection combined with hands-on, realistic training on actual relays. Laboratory exercises will cover proper relay maintenance,

specific test procedures including proper calculations for impedance relay testing, and detailed adjustment and calibration procedures utilizing state of the art relay test sets. Participants will understand applicable NETA testing standards, what test result information should be recorded, and what hand tools are necessary for proper relay adjustment and calibration.
The course will be covering:
• Understand how the relay is applied in the power system.
• Identify electromechanical relay components.
• Interpret AC and DC relay schemes.
• Perform as found/left tests and calibrate the subject relays (ANSI device numbers).
• Explain the application of these relays.
• Utilize a relay test set to perform direct injection testing and evaluate results.
• Directional Distance Relays (21).
• a. Mho.
• b. Reactance.
• Sync Check Relays (25).
• Directional Overcurrent (67).
• Ground Directional Overcurrent (67G).
Who Should Attend
This hands-on course is intended for electricians, technicians and engineers responsible for testing, maintenance and calibration of electromechanical protective relays that protect utility transmission lines and substation equipment. The participant should have basic knowledge of AC/DC electricity and basic relay testing experience.