Protection of Primary and Secondary Substation Transformers

Protection of Primary and Secondary Substation Transformers

Course Outline

This 5-hour course covers the recommended practice for proper protection for primary and secondary substation transformers.

The course materials are based entirely on Chapter 11 Transformer Protection of IEEE 242-2001 IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems. It will be necessary for the student to obtain a copy of IEEE 242-2001 IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems. This is a very useful resource and is recommended that all practicing electrical or project engineers involved in the specification, design, protection, installation, and maintenance of primary and secondary substation transformers used in industrial and commercial power systems obtain a copy or have access to this important recommended practice.

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

Learning Objective

At the conclusion of this course, the student will be familiar with:

Definitions of the terms that are used in this recommended practice;
Need for protecting transformers;
Objective in transformer protection;
Types of transformers;
Types of preservation systems;
Protective devices for liquid preservation systems;
Mechanical detection of faults;
Sudden pressure relay;
Thermal detection of abnormalities;
Hot-spot temperature thermometers;
Forced-air cooling;
Nonlinear load effects;
Primary protection devices;
Short-circuit current protection; and
Transformer through-fault capability.

Intended Audience

The intended audience is professional electrical engineers, project managers, and project engineers, involved in the specification, design, protection, installation, and maintenance of primary and secondary substation transformers used in industrial and commercial power systems.

Benefit to Attendees

This course provides the recommended practice to properly protect primary and secondary substation transformers. The proper protection will not only minimize the damage and cost of repairs, but will also minimize the electrical system disturbance, the magnitude of the service outage and the duration of the outage. Prompt fault clearing usually prevents catastrophic damage. Proper protection is, therefore, important for transformers of all sizes, even though they are among the simplest and most reliable components in the plant’s electrical system.

Course Introduction

This 5-hour course covers the recommended practice for proper protection for primary and secondary substation transformers.

This recommended practice covers the protection for primary substation transformers normally in the range in sizes between 1000 kVA and 12,000 kVA with a secondary line to line voltage between 2400 V and 13,800 V. This recommended practice also covers the protection for secondary substation transformers normally in the range in sizes between 300 kVA and 2500 kVA, with secondary line to line voltages of 208 V, 240 V, or 480 V. Larger and smaller transformers may also be protected by the devices discussed in this chapter. This recommended practice is a useful tool that assists individuals, organizations, and suppliers involved in the specification, design, installation, and maintenance of primary and secondary substation transformers. This recommended practice is recognized in the industry for assisting in the protection of primary and secondary substation transformers used in electrical distribution systems.

Course Content

This recommended practice provides for proper protection for primary and secondary substation transformers. The course materials are based entirely on Chapter 11 Transformer Protection of IEEE 242-2001 IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems. It will be necessary for the student to obtain a copy of IEEE 242-2001 IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems. This is a very useful resource and is recommended that all practicing electrical or project engineers involved in the specification, design, protection, installation, and maintenance of primary and secondary substation transformers used in industrial and commercial power systems obtain a copy or have access to this important recommended practice.

IEEE 242-2001 IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems can be purchased from the following websites:

http://www.api.com/
http://www.global.ihs.com/

IEEE 242-2001 IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems
Chapter 11 Transformer Protection

Table of Contents

11.1 General discussion
11.2 Need for protection
11.3 Objectives in transformer protection
11.4 Types of transformers
11.5 Preservation systems
11.6 Protective devices for liquid preservation systems
11.7 Thermal detection of abnormalities
11.8 Transformer primary protective device
11.9 Protecting the transformer from electrical disturbances
11.10 Protection from the environment
11.11 Conclusion
11.12 References

You need to obtain a copy of IEEE 242-2001 IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems to successfully take this course.

Course Summary

This recommended practice covers the protection for primary substation transformers normally in the range in sizes between 1000 kVA and 12,000 kVA with a secondary line to line voltage between 2400 V and 13,800 V. This recommended practice also covers the protection for secondary substation transformers normally in the range in sizes between 300 kVA and 2500 kVA, with secondary line to line voltages of 208 V, 240 V, or 480 V. Larger and smaller transformers may also be protected by the devices discussed in this chapter. Thisrecommended practice is a useful tool that assists individuals, organizations, and suppliers involved in the specification, design, installation, and maintenance of primary and secondary substation transformers. This recommended practice is recognized in the industry for assisting in the protection of primary and secondary substation transformers used in electrical distribution systems.

Related Links

For additional technical information related to this subject, please visit the following websites or web pages:

http://www.ansi.com/
http://www.ieee.com/
http://www.api.com
http://www.nema.com

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.