Electrical Calculation Methods and Examples

Bijan Ghayour, P.E.

Course Outline

This 3-hour course provides simple methods and procedures for performing standard and routine calculations for electrical systems engineering and design. The procedures and methods presented here are for the preliminary calculations in order to establish the basic parameter of a power system design. Detailed calculations involving commercially available software packages might be necessary to confirm the results obtained from the material presented in this course. Procedures and calculation methods presented here are accompanied by simple and practical examples to enforce the understanding of the course material.

Topics such as: short circuit current effects, voltage drop, transformer sizing, energy savings with oversized conductors, battery and battery charger sizing, power factor correction capacitors, automatic transfer switch sizing, and adjustable speed drive economic evaluation are discussed.

This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of course materials.

Learning Objective

The purpose of this course is to provide the attendee with concepts, methods and procedures for performing the standard and routine calculations for electrical system engineering and design.

At the conclusion of the course the attendees will be familiar with the:

• Short circuit current effects;
• Voltage drop;
• Transformer rated current;
• Transformer impedance effects;
• Transformer sizing;
• Energy savings with oversized conductors;
• Adjustable speed drive economic evaluation;
• Automatic transfer switch sizing;
• Sizing capacitors for power factor correction; and
• Battery and battery charger sizing.

Intended Audience

This course is intended for electrical engineers and designer responsible for the design of electrical distribution system for commercial, institutional, and industrial facilities.

Benefit to Attendees

At the conclusion of the course, attendees will have a thorough knowledge of the methods and procedures for performing standard and routine calculation employed in the engineering and the design of electrical distribution systems.

Course Introduction

This course offers methods and guidelines for performing standard and routine calculations for electrical systems engineering and design. The material offered here are for the preliminary calculations only and should help the engineer and designer in establishing the major parameters of an electrical system. Detailed calculations involving commercially available software packages might be necessary to confirm the results of the material presented in this course. Topics such as; short circuit current effects, voltage drop, transformer rated current, transformer impedance effects, transformer sizing, energy savings with oversized conductors, adjustable speed drive economic evaluation, automatic transfer switch sizing, sizing capacitors for power factor correction, and battery and battery charger sizing are discussed.

Guidance and recommendations herein are based on industry standards and experience in existing facilities. However, projects and situations vary greatly, and sound engineering and management judgment must be exercised when applying these methods and procedures. All available information must be considered in conjunction with this course.

Course Content

This course contains concepts and methods for performing standard and routine calculations for the engineering and the design of the electrical systems for industrial, institutional, and commercial facilities.

Course Summary

This 3-hour course provides simple methods and procedures for performing standard and routine calculations for electrical systems engineering and design. The procedures and methods presented here are for the preliminary calculations in order to establish the basic parameter of a power system design. Detailed calculations involving commercially available software packages might be necessary to confirm the results obtained from the material presented in this course. Procedures and calculation methods presented here are accompanied by simple and practical examples to enforce the understanding of the course material.

Topics such as: short circuit current effects, voltage drop, transformer sizing, energy savings with oversized conductors, battery and battery charger sizing, power factor correction capacitors, automatic transfer switch sizing, and adjustable speed drive economic evaluation are discussed.

Quiz

Once you finish studying the above course content, you need to take a quiz to obtain the PDH credits.

DISCLAIMER: The materials contained in the online course are not intended as a representation or warranty on the part of PDH Center or any other person/organization named herein. The materials are for general information only. They are not a substitute for competent professional advice. Application of this information to a specific project should be reviewed by a registered architect and/or professional engineer/surveyor. Anyone making use of the information set forth herein does so at their own risk and assumes any and all resulting liability arising therefrom.