PROT 411: Substation Equipment Protection

Engineers who need a comprehensive understanding of the design concepts and methods used in protecting high-voltage electrical substation bus and power transformers would benefit from this course.

PROT 411 provides an in-depth study of the methods used in designing protection for high-voltage power transformer protection and substation bus protection.

Agenda

• Overview of Power System Faults
• Relaying Fundamentals
• Instrument Transformers (includes a class exercise)
• Overcurrent Protection Principles (includes a class exercise)

• Differential Protection Principle
• Bus Protection (includes a class exercise)
• Transformer Differential Protection
• Transformer Protection Exercise

• Transformer Nondifferential Protection
• Transformer Overcurrent Protection Exercise
• Substation Trip Circuits and Breaker Failure

Note: This course teaches fundamental knowledge but does not provide hands-on experience with SEL relays.

Course Objectives

At the conclusion of this course, students can:

• Describe the protection requirements of power transformers and buses
• Specify current transformers for protective relay applications
• Define transformer protection issues and identify solutions using digital relays
• Define bus protection problems and identify solutions for digital relays
• Calculate relay settings for transformer and bus protection relays

Prerequisites

A degree in electrical engineering or equivalent experience is required. In addition, PROT 411 requires completion of PROT 401: Protecting Power Systems for Engineers or the following:

• Familiarity with wye and delta transformer connections
• A basic knowledge of protective relay design, symmetrical components, and power system protection
• A working knowledge of trigonometry, basic calculus, complex numbers, and phasor concepts

Course Preparation

Please check the General Course Information page for what you should bring to class.