S&C Electric Company

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S&C’s Power Systems Services Seminar:

Power Transformers

This one day seminar has been specifically designed for distribution engineers, technicians, electricians, utility service representatives, and substation consultants working in electric utility departments and engaged in material specification, operation and, maintenance of power transformers. This seminar offers a blend of theoretical and practical information that can be applied on the job. A bound set of course material is included in the seminar fee, as well as refreshments and lunch.

A 10% discount applies for each additional attendee from the same organization. This seminar can also be arranged for your location for groups of 10 or more attendees.

Seminar Outline

General Transformer Design Considerations

  1. Site location
    1. Elevation, environment
    2. Natural and process imposed
    3. Proximity to water
    4. Local factors
    5. Application
  2. Oil preservation types
    1. Conservator
    2. Sealed tank
  3. Choosing size (MVA), cooling, voltage, phases, tap changer
  4. Transformer major components
    1. Windings (coils); types, circular vs. rectangular, short circuit considerations, application, manufacture
    2. Lead support structures
    3. Core; materials, types, design, manufacture
    4. Cooling/insulation fluids; oil, silicone, PCB
    5. Tank and steel parts, sustaining the mechanical requirements, gaskets
    6. Coolers; radiators, water, forced oil
  5. Transformer integral components
    1. Bushings; types, mounting, on site installation
    2. Lightning Arresters; types, mounting
    3. Tapchangers; de-energized, under load
    4. Current Transformers
    5. Fan motors, blades
  6. Transformer ancillary components
    1. Temperature and hot spot equipment
    2. Mechanical relief device & shroud
    3. Sudden pressure relay
    4. Gas detector relay
    5. Breathers; open, silica gel
    6. Valves; drain, sample, vacuum
    7. Inertaire equipment
    8. Grounding resistors
    9. General controls cabinet
    10. Load tapchanger control cabinet

Transformer Maintenance and Testing

  1. General overview
    1. Factory test data
    2. Commissioning data
    3. Maintenance frequency; daily, monthly, yearly
    4. Records, records, records
  2. Oil testing, sampling method, evaluation criteria, acceptance criteria
    1. Standard oil test
    2. Dissolved gas in oil analysis test
  3. Insulation resistance; testing method, evaluation criteria, acceptance criteria
    1. Dielectric absorption tests
  4. Dissipation/Power factor; testing method, evaluation criteria, acceptance criteria
  5. Turns ratio
  6. Relief devices
  7. Tapchangers
    1. De-energized
    2. Under load
  8. Bushings, gaskets, cooling systems — radiators, fans, fan blades, breathers
  9. Controls, control cabinets, Inertaire equipment

For More Information

Contact: Ms. Kenisha Willis
Tel: (416) 249-9171, ext. 349
Email: kwillis@scelectric.ca
Fax: (416) 249-6051