Substation Maintenance Training - Equipment Testing & NETA MTS

Our Substation Maintenance Training course is a practical, vendor-neutral guide to inspecting, testing and maintaining the equipment that keeps substations in service. It covers disconnect switches, circuit breakers, switchgear, power transformers, instrument transformers, ground grids, station batteries and relays.

This 12-hour, instructor-led course is for engineers, technicians and maintenance personnel who plan, perform or review substation maintenance. You will learn what each test reveals, how to interpret the results and how to build a maintenance program that prevents failures before they happen.

Why Substation Maintenance Matters

Substation equipment often runs for decades with little attention until something fails. A failed breaker, transformer or battery can cause long outages, costly emergency repairs and serious hazards to workers. Most of these failures show warning signs long before they occur, if the right tests are performed and understood.

Maintenance expectations are also rising. NFPA 70B is now a standard rather than a recommended practice, and owners are moving from fixed time-based schedules to condition-based maintenance driven by test data. Many maintenance teams are losing experienced staff and need new personnel to become productive quickly.

This course connects test procedures with sound maintenance decisions. You will learn which tests to perform, what normal and abnormal results look like, and when to repair, monitor or replace equipment.

 

Learning Outcomes

By the end of this course, you will be able to:

  • Identify substation types, major components and the hazards of substation maintenance work
  • Apply NFPA 70B and ANSI/NETA MTS to set maintenance tasks and intervals
  • Inspect and maintain disconnect switches, interlocks and motor operators
  • Test oil, vacuum and SF6 circuit breakers using insulation resistance, contact resistance, power factor and timing tests
  • Inspect switchgear insulation, connections and torque, and apply thermography and partial discharge checks
  • Perform and interpret transformer winding resistance, turns ratio, power factor and excitation tests
  • Sample insulating oil and interpret oil quality tests and dissolved gas analysis
  • Test CT and VT ratio, polarity and excitation characteristics
  • Measure ground grid and earth resistance and recognize unsafe step and touch potentials
  • Maintain and test station batteries and chargers, and support relay maintenance under NERC PRC-005

You will leave able to plan maintenance, interpret test results and make confident repair, monitor or replace decisions.

 

Course Objectives

  • Build a practical understanding of how to maintain and test each major piece of substation equipment
  • Help participants interpret test data, not just collect it
  • Support the move from time-based to condition-based maintenance
  • Reduce unplanned outages, equipment failures and maintenance-related hazards

 

Course Approach

The course is vendor-neutral and based on real maintenance practice in utility and industrial substations. Each module ties equipment construction and failure modes to the tests that detect them.

Worked examples use actual test results, including breaker timing traces, transformer power factor data, DGA results and ground test readings. Live polls and discussion keep participants engaged and let the instructor focus on the equipment your team maintains.

 

Related Training and Resources

To enhance your understanding of electrical infrastructure, see our related courses and guides:

 

 

 

Live online course schedule

December 1–2, 2026
10:00 am - 4:30 pm ET

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Who should attend

This course is designed for:

  • Substation maintenance engineers and technologists
  • Electrical test technicians
  • Transmission and distribution maintenance engineers
  • Substation operations and planning managers
  • Substation design and consulting engineers
  • Protection and control engineers and technologists
  • Utility and industrial maintenance supervisors
  • Asset management and reliability engineers

 

Course Benefits

  • Substation Maintenance Training Certificate
  • 1.2 Continuing Education Unit (CEU) Credits (12 Professional Development Hours)
  • $100 Coupon Toward any Future Electricity Forum Course (Restrictions Apply)
  • FREE Electricity Today Magazine Subscription (Value $25.00)
  • Forum Presentations in PDF Format

 

Substation Maintenance Training Course Outline
 

DAY ONE

 

Module 1: Substation Overview, Safety and Maintenance Programs

  • Substation types, bus configurations and major components
  • Substation hazards: step and touch potential, induced voltage and minimum approach distances
  • NFPA 70E safe work practices for substation maintenance
  • NFPA 70B and ANSI/NETA MTS maintenance requirements and intervals
  • Time-based versus condition-based maintenance

 

Module 2: Air and Disconnect Switches

  • Switch types and operating mechanisms
  • Inspection, alignment and lubrication
  • Contact resistance testing
  • Interlocking and motor-operated mechanisms
  • Vacuum interrupters and load-break devices

 

Module 3: Circuit Breaker Maintenance and Testing

  • Oil, vacuum and SF6 breaker construction and failure modes
  • Insulation resistance and hi-pot testing
  • Contact resistance and power factor testing
  • Timing, travel and operation tests
  • Vacuum bottle integrity and SF6 gas handling

 

Module 4: Switchgear Maintenance and Testing

  • Metal-clad and metal-enclosed switchgear arrangements
  • Insulation systems and auxiliary components
  • Bolted connections and torque requirements
  • Infrared thermography and partial discharge detection
  • Breaker racking safety and maintenance intervals

 

Module 5: Transformer Electrical Testing

  • Transformer testing safety
  • Winding resistance and turns ratio testing
  • Power factor and tan delta testing of windings and bushings
  • Core excitation current testing
  • Introduction to sweep frequency response analysis (SFRA)

 

DAY TWO

 

Module 6: Transformer Oil and Dissolved Gas Analysis

  • Insulating liquids, including mineral oil, silicone and natural esters
  • Oil sampling procedures
  • ASTM oil quality tests and moisture assessment
  • Dissolved gas analysis and fault gas interpretation
  • Combustible and oxygen gas testing and trending results

 

Module 7: Current and Voltage Transformers

  • CT and VT connections, ratios and polarity
  • Burden and its effect on accuracy
  • Ratio, polarity and excitation testing
  • Coupling capacitor voltage transformers (CCVTs)
  • Safe handling of CT secondary circuits

 

Module 8: Ground Grid Testing

  • Grounding connections, grid design and hazards
  • Soil resistivity testing
  • Fall-of-potential and clamp-on earth resistance testing
  • Ground grid integrity testing
  • Grounding system maintenance

 

Module 9: Station Battery Maintenance and Testing

  • Flooded and VRLA battery operation
  • Temperature effects and safety precautions
  • Inspections, measurements and equalizing charges
  • Capacity testing and charger maintenance
  • IEEE 450 and IEEE 1188 maintenance practices

 

Module 10: Protective Relay Maintenance and Maintenance Records

  • Relay types, zones of protection and maintenance needs
  • Relay maintenance testing and NERC PRC-005 intervals
  • Test records, trending and maintenance documentation
  • Building a condition-based maintenance program

 

COURSE SCHEDULE:

Both days:

Start: 10 a.m. Eastern Time
Finish: 4:30 p.m. Eastern Time

 

 

 

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Live online course registration fees & CEU credits

The registration fee for this course is $799.

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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.
  • One CEU is equivalent to 10 professional development hours of instruction.
  • This course earns 1.2 CEUs.

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