Live Online Scheduled Course
Live Online Scheduled Course
Customized In-person Group Training
Customized
In-person Group Training
Live Online Group Training
Customized
Live Online Group Training

MV & HV Circuit Breaker Maintenance Training

The registration fee for this course is $699.

$599 (with coupon: save $100)

Register 3 delegates at full price $699, and get a 4th registration FREE!

Live Online
In-person
12 hours
Scheduled Classes

Medium & High Voltage Circuit Breaker Maintenance - This 12-hour (2 Day) live online training course is designed for engineers and technicians from utilities or industries who participate in the design, installation, testing, or maintenance of high voltage circuit breakers and substation controls.  Participants will increase their knowledge of circuit breakers and learn techniques for diagnostics, testing, and maintenance of medium & high voltage circuit breakers.  Information presented will concentrate on medium voltage vacuum circuit breakers and high voltage SF6 circuit breakers since these are types most commonly applied in power systems, but other types will be discussed as well.

 

Learning Outcomes

  • Understand purpose for circuit breakers and their function in power systems 
  • Recognize the various bus configurations used in substations, switching stations, and generation stations
  • Understand operation of batteries, chargers, trip/close, and control circuits
  • Know how to apply and connect current transformers in protection circuits
  • Recognize tradeoffs for reclosing on transmission & distribution lines
  • Learn testing and maintenance procedures for circuit breakers
  • Understand breaker failure schemes
  • Explore options for interfacing protective relays with circuit breakers

 

Live online course schedule

December 1–2, 2025
10:00am - 4:30pm ET

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Who should attend

  • Substation Construction Technicians 
  • Substation Design Engineers
  • Substation Operation/Maintenance Engineers & Technologists
  • Relay Technicians
  • Generation Engineers & Technicians
  • Testing & Commissioning Engineers
  • Maintenance Engineers & Technologists
  • Control System Engineers
  • System Protection Engineers
  • Consulting Engineers
  • Transmission & Distribution Engineers

 

What you will get

1
1.2 Continuing Education Unit (CEU) credits
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2
MV & HV Circuit Breaker Maintenance Training Certificate
Training Certificate
3
100-page Arc Flash/Electrical Safety Handbook (Value $20)
Electrical Safety Handbook
4
Free magazine subscription (Value $25)
Free Magazine Subscription
5
$50 coupon toward any future Electricity Forum event
Coupon
6
Course presentations in PDF format
Course Presentation

Medium & High Voltage Circuit Breakers  – Course Outline

DAY ONE

Circuit Breaker Application in Power Systems

  • Purpose for circuit breakers
  • History of circuit breakers
  • Application of reclosers on medium voltage distribution systems
  • Substation medium voltage circuit breakers
  • Substation high voltage transformer protection
  • Switching station high voltage line protection
  • EHV systems

 

Bus Configurations

  • Single bus
  • Main & Transfer
  • Ring bus
  • Double bus – double breaker
  • Comparison of configurations

 

Disconnect Switches

  • Vertical break
  • Side break
  • Center break
  • Vee-switch
  • Double break
  • Loadbreak switches
  • Switch ratings
  • Switch maintenance

 

Medium Voltage Circuit Breaker Types (2-35 kV)

  • Air circuit breakers (ACB)
  • Oil circuit breakers (OCB)
  • Vacuum circuit breakers (VCB)
  • Metal-clad switchgear

 

High Voltage Circuit Breaker Types (50-245 kV)

  •  Circuit breaker mechanisms
  • Dead tank SF6 circuit breakers
  • Live tank SF6 circuit breakers and circuit switchers
  • SF6 alternative gasses
  • Oil circuit breakers (OCB)
  • High-voltage VCB’s
  • Air-blast circuit breakers

 

Extra-High Voltage Circuit Breaker Types (345 kV and above)

  • Reclosing (79)
  • Pros and cons of reclosing on line faults
  • Distribution circuits, reclosing considerations
  • Transmission circuits, reclosing considerations

 

DAY TWO


Current Transformers

  • Types of current transformers
  • CT ratios & polarity
  • CT accuracy, burden, and saturation
  • Shorting CT secondary circuits, test switches
  • Open-circuit CT voltage and safety considerations
  • CT magnetization
  • CT Connection in ring bus / breaker & a half schemes

 

Substation DC Systems

  • Purpose for DC systems in substations
  • Batteries, different types and comparison
  • Battery capacity, battery installation
  • Battery chargers
  • Trip circuits
  • Close circuits
  • DC circuit monitoring 
  • Trip coil redundancy

 

Circuit Breaker Testing

  • Micro-ohm resistance (ductor)
  • Trip Coil signature (first-trip testing)
  • Travel Analysis
  • Power factor testing
  • Monitoring opening times through MP relays

 

Circuit Breaker Maintenance

  • OCB – Dissolved Gas Analysis and dielectric strength
  • OCB – metal content in oil
  • SF6 – Purity and decomposition
  • Vacuum – high-pot testing
  • Vacuum – erosion and gap
  • Lubrication
  • Battery maintenance
  • Trip checks

 

Troubleshooting Circuit Breaker Problems

  • Failure to trip or close
  • Slow tripping times
  • Slow closing times
  • Mechanism problems
  • Overtravel and rebound
  • Interruption failure

 

Bus Protection and Breaker Failure schemes

  • CT connections in different bus configurations
  • Bus differential relays
  • Breaker failure protection

 

Connection to Relays and SCADA

  • Breaker status indication 
  • SCADA alarms related to circuit breakers
  • Electro-mechanical relay control schemes
  • Microprocessor (MP) relay control schemes
  • Integration of circuit breakers with MP logic
     

COURSE SCHEDULE

Both Days:

Start: 10:00 am - Eastern Time

Finish: 4:30 pm - Eastern Time

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Live online course registration fees & CEU credits

The registration fee for this course is $699.

Regular price
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$599 (with coupon: save $100)

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Group Offer
Register 3, Get 1 Free

Register 3 delegates at the full price of $249 each and get the 4th registration free! Perfect for companies, safety departments, and teams looking to train multiple employees at once.

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2nd $249
3rd $249
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Earn Continuing Education Unit (CEU) Credits

  • Successful completion of this course qualifies delegates to receive a certificate of course completion with indicated CEUs.
  • CEUs are granted by the Engineering Institute of Canada.
  • One CEU is equivalent to 10 professional development hours of instruction.
  • This course earns 0.6 CEUs.
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PRESIDENT, THE ELECTRICITY FORUM TRAINING INSTITUTE
randy@electricityforum.com

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Group Offer
Register 3, Get 1 Free

Register 3 delegates at the full price of $249 each and get the 4th registration free! Perfect for companies, safety departments, and teams looking to train multiple employees at once.

1st $249
2nd $249
3rd $249
4th FREE

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