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Medium Voltage Circuit Breaker Testing and Maintenance

Medium Voltage Circuit Breaker Testing and Maintenance

This One-day course is designed for substation engineers for better understanding the construction and maintenance (testing and diagnostics) requirements for medium voltage circuit breakers. Engineers directly involved in maintaining substations and medium voltage switchgears or those requiring an understanding of the various tests and or diagnostics and analyzing test results will gain a better understanding of best maintenance practices as required by industry accepted standards.

Training program is based on: (1) Canadian Standards Association: CSA Z463- Standard for Maintenance of Electrical Systems; (2) Canadian Standards Association: CSA Z462- Standard for Electrical Safety; (3) National Electrical Testing Association (NETA): ANSI/NETA 2019 Standard for Maintenance Testing Specifications and (4) Professional Electrical Apparatus Recyclers League: Reconditioning Standards for Electrical Equipment.

Each student receives three comprehensive binders of reference material including maintenance frequencies, PEARL test standards and test forms.


After the training, the successful candidate will be able to:

  1. Perform tests on various MV circuit breakers and interpret results
  2. Understand the operation of electrically operated circuit breaker controls
  3. Be able to understand the operation of breaker mechanisms and failure modes
  4. Perform maintenance on low breakers and schedule
  5. Inspect physical and mechanical condition.
  6. Inspect anchorage, alignment, and grounding.
  7. Verify that all maintenance devices are available for servicing and operating the breaker.
  8. Verify the unit is clean.
  9. Verify the arc chutes are intact.
  10. If recommended by manufacturer, slow close/open breaker and check for binding, friction, contact alignment, and penetration. Verify that contact sequence is in accordance with manufacturer’s published data.

Who should attend:

This training is recommended for: Substation engineers, industrial electricians, project engineer, electrical test technicians and commissioning engineer, field engineers, managers and substation supervisors.

Please note that his training can be modified to suit your specific needs. We will be happy to conduct a needs analysis with you to determine your specific requirements. It can be conducted either on-site or off-site.

I. Safety and Maintenance Planning

Objective – Review the basic concepts of electrical safety and maintenance as per CSA-Z462 and CSA-Z463.

  • Shock and arc flash safety.
  • Run to failure maintenance.
  • Preventive maintenance.
  • Predictive maintenance.
  • Apparatus failure modes and frequencies.

II. Breakers

Objective – Review NETA tests on various medium voltage circuit breakers and interpret results. Describe the operation of electrically operated circuit breaker controls. Describe the operation of breaker mechanisms and failure modes. Explain maintenance on Air, Vacuum and SF6 Gas breakers and schedule.

  • Review NETA visual and mechanical inspection
  • Review NETA tests and interpret results:
    • Insulation Resistance,
    • Dielectric Withstand,
    • Vacuum Integrity,
    • Contact Resistance,
    • Breaker Timing,
    • Travel Analysis,
    • Minimum Coil Voltage Pickup

Registration Form

Basic Information - Step 1 of 3
Needed for easier scheduling the training with respect to the Timezone.
If you have the Skype account, we can contact you much easier to arrange the training details.
If you have the Whatsapp account, we can contact you much easier to arrange the training details.

Training Summary

Selected Training Course: Medium Voltage Circuit Breaker Testing and Maintenance
Duration: One day (8AM to 4PM)
Price: $549.00

After you submit the training request, you will be contacted by training management via email for scheduling details.

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