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This course will cover all aspects of high & medium voltage circuit breakers & their use in substations , general design considerations, application of switching & power equipment, fault withstand & interrupting capabilities, interface with protection..

Course Outline

After participating in this course, you will be able to:
• Enhance your knowledge of the fundamentals of the circuit breakers and how it impacts on the industrial/commercial distribution system
• Discover the most important operating characteristics of the circuit breaker
• Become aware of the criteria governing the application of breakers
• Equip yourself with the necessary information for the startup and regular maintenance of circuit breakers
• Further your understanding of circuit breaker technologies and the circuit factors that impact on them
• Improve your knowledge of application of circuit breakers
• Benefit from the experience of instructors and other participants who have encountered and solved similar application situations
• Discuss your electrical problems with industry specialists
• Gain from networking with your peers


Circuit breakers are an essential element in a power system network in maintaining the continuity of power supply and power quality to the industrial and commercial consumers. The Circuit breaker comprises of switching mechanism and must operate safely under all conditions to connect and disconnect circuits

This course will cover all aspects of high and medium voltage circuit breakers and their use in substations , general design considerations, application of switching and power equipment, fault withstand and interrupting capabilities, interface with  protection/control, automation and communication, and maintenance considerations.


To provide a practical understanding of  design, application and maintenance aspects of high and medium voltage circuit breakers for utility networks and industrial plants.

Who Should Attend

Electrical power systems engineers in utilities and industrial plants, managers of private electricity producers and large power consumers, consulting engineers, manufacturers of power equipment, other engineers and technical personnel involved in the design, operation and maintenance of high/medium voltage substations.

Instructors: Ajit Bapat

Program Outline 

Day I 

8:00      Registration and Coffee

8:20      Welcome, Introduction, Workshop Preview, Learning Outcomes and the Assessment Method

8:30      Switching Phenomenon
            • Switching in AC circuits 
            • Transient recovery voltage 
            • Rate of rise of recovery voltage, restrikes and re ignitions

10:15    Evolution of Circuit Breakers 
            • Oil Circuit breakers, 
            • Airblast breakers
            • Air magnetic breakers 
            • SF6 breakers 
            • Vacuum breakers 

12:00    Lunch

1:00      Application of Circuit Breakers
            • Distribution system voltages
            • Classification of circuit breakers
            • Breaker selection and ratings

2:30      Refreshments and Networking

2:45      GIS Application
            • Review of GIS technology
            • Layout and bus arrangement
            • Handling of SF6 Gas
            • Economics

4:45      Open Forum – Questions and Answers
5:00      Adjournment  

Day II

8:30      Substation Application 
            • Disconnect switch and circuit breakers
            • Circuit arrangements 
            • Station battery

10:30    Refreshments and Networking

10:50    Application of Circuit Breakers (Cont’d)
            • The ANSI C37 Standard and Guide
            • Transient recovery voltage
            • Out of phase switching
            • Generator breakers
            • Capacitor switching
            • Principles of insulation co-ordination
            • Classification of over voltages
            • Surge arresters and choice of arrester rating
            • Standard insulation levels
            • The concept of protective levels and protective margins
            • Protective margins in insulation co-ordination

12:00    Lunch

1:00      Application of Circuit Breakers (Cont’d)

            • Surge arresters and choice of arrester rating
            • Standard insulation levels
            • The concept of protective levels and protective margins
            • Protective margins in insulation co-ordination

2:45      Refreshments and Networking

3:00      Testing of Breakers 
            • Design tests 
            • Factory tests
            • Commissioning tests
            • Maintenance testing 

4:50      Questions and Answers and Feedback to Participants on Achievement of Learning Outcomes

5:00     Concluding Remarks and Final Adjournment

Prerequisites & Certificates

Certificates offered

1.3 CEU / 13 PDH

Cancellation Policy
To withdraw from a course, you must send a request, in writing, with the official receipt to our office. Fifteen or more business days in advance: full refund less $50.00 administration charge. Five to fifteen business days in advance: non-refundable credit of equal value for any future EPIC seminar within one year. Credits are transferable within your organization. In case of an unexpected event occurring after this time, you may send someone else to take your place without any additional cost.
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Here are some reviews of the training vendor.
The course was very well presented and the course instructor was absolutely amazing.
Reviewed by 2013
Our instructor, Stephen Lamming, was outstanding and a true expert in his field. He was able to complement the technical air monitoring information with practical real life examples which was highly beneficial. He is an excellent communicator and was highly interactive with the course attendees. This course was recommended to me because Stephen Lamming does an outstanding job. I was very impressed with this course and have subsequently recommended it to my colleagues.
Reviewed by 2012
Would have liked more interactive problem solving.
Reviewed by 2011

This course currently does not have any dates scheduled. Please call 1-877-313-8881 to enquire about future dates or scheduling a private, in house course for your team.

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