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.
Contact Information
qualu@qualuscorp.com
689-205-9460
Lodging
Orlando Marriott Lake Mary
1501 International Parkway
Lake Mary, FL 32746
Room Block Rate:
$135/Night
Room Block Cut-off Date: 5/19/2025