11kV Fitting Maintenance

11kV Fitting Maintenance

Course summary

Length: 5 days
Price: 1,000 GBP excl. VAT
Location: Corby
Next available date: Enquire for dates & details - Corby
11kV Fitting Maintenance - A 5-day equipment maintenance training course

Designed for professional fitters, this training course provides an introduction to 11kV fitting maintenance. The course covers the essential knowledge and skills required to complete 11kV fitting maintenance and prepares delegates for success in this role. 

Delegates will become familiar with:

  • Relevant acts, regulations and codes of practise
  • The principles of maintaining secondary sub-stations
  • Hygiene procedures
  • Protection systems for secondary sub-stations
  • Equipment and methods for sub-station maintenance

Delegates will complete the course with the ability to:

  • Maintain sub-station plants and equipment for city, package and sub-stations
  • Test protection systems
  • Maintain sub-station plants after faults


Who Should Attend:

This training course is suitable for fitters who have completed a fitting construction course and wish to develop their skills in 11kV fitting maintenance.


Delegates must hold a current competency for maintenance equipment


Upon successful completion of this course, delegates will receive a certification of attendance.


Course Content:

This training course will cover the following content:


General Maintenance and Operation of 11kV Oil Circuit Breaker

  • Oil testing procedures • Dielectric Strength
  • Moisture Content
  • Dressing of fixed and moving contacts
  • Contacts
  • Wipe Checks
  • Renewal
  • Resistance checks
  • Maintenance and Lubrication of Mechanisms – Auxiliary Switches, interlocks and Shoot bolts

General Maintenance and operations of 11kV SF6 and Vacuum Circuit Breakers SF6

  • Gas Pressure checks
  • Cable Box checks
  • Auxiliary Box checks
  • General Cleaning
  • Earthing Checks


  • Vacuum Interrupters Checks
  • Primary Contact Resistance Checks
  • Closing Solenoid
  • Trip Solenoid – Check, adjust, Lubricate


  • Mechanical Mechanisms
  • Raising/Lowering Gear
  • Interlocks Check, Lubricate

11KV Oil Transformer Maintenance

  • Oil Handling-sampling/testing
  • Dielectric strength
  • Moisture content
  • Acidity Test
  • PCB Awareness
  • Remedial Maintenance
  • Oil Change – Flushing
  • Refilling