24 Credits
24 CEHs and 24 NETA CTDs
Dates
June 10 - June 12, 2025
Schedule
8am - 5pm ET
Instructor
Patrick Buchanan
Location
Qualus
100 Colonial Center Parkway
Suite 400
Lake Mary, FL 32746
Relay Schemes and Testing Calculations is developed for Relay Technicians by a Relay Technician. While the seminar is directed toward relay technicians, engineers and technicians from many other disciplines have also taken this seminar. This seminar provides attendees with in-depth knowledge of how protective relays work when executing testing and commissioning activities.
Target Participants
- Utility field engineers and technicians with prior relay testing experience
- Utility design engineers
Course Outline
Trig Functions and Phasor Math
- Trig Functions Used for Meter and Relay Calculations
- Rectangular vs Polar Forms of Phasors
- Phasor Addition, Subtraction, Multiplication and Division
Introduction to Basic Logic Functions
- AND Gate and Its Equivalent Circuit
- OR Gate and Its Equivalent Circuit
- NOT Gate and Its Equivalent Circuit
The Power Triangle
- Watts Calculation
- VARS Calculation
- Line Angle and Power Factor
Discovering Transformers
- Polarity of Transformers
- Current Transformers
- Transformer Phase Shift Compensation
- Transformer Differential Relay Tap Calculations
Symmetrical Components
- Positive, Negative and Zero Sequence Calculations
- Fuse Failure/Loss of Potential Circuits
- Forcing Neutral Current
- Zero Sequence Detector Circuits
- Symmetrical Components during Faults
Protection Schemes
- Protection System Overview
- Protection System Requirements
- IEEE Relay Device Numbers
- Overcurrent Protection Coordination and Testing
Differential Protection
- Differential Protection Operating Theory
- Transformer Differential Testing Calculations
- Line Differential Alpha Plane Testing Calculations
Line Protection
- Step Distance Protection
- Plotting a Mho Circle on an R-X Diagram
- Max Torque Angle Testing
- Phase-to-Phase, Phase-to-Ground, and 3-Phase Testing Calculations
- Directional Ground Overcurrent Testing
Communication Based Line Protection
- Communication Based Tripping Schemes
- End-to-End Testing Overview
- End-to-End Fault Calculations
Course Credits
24 CEHs and 24 NETA CTDs
The Power Systems Seminars have been approved by the Florida Board of Professional Engineers for CEHs.
Course Details
Contact Information
qualu@qualuscorp.com
689-205-9460