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Transformer Operation, Maintenance & Testing
Objectives

At the end of the course participants will learn:

  • Fundamental theory and principles of the operation of power transformers
  • Insight into the identification and application of transformers types
  • Understand the power transformer components and their construction
  • Power transformer protection
  • Power transformers' oil, oil tests and interpretation of results
  • The most effective power transformer electrical tests
  • How to manage power transformer breakdowns to ensure a minimum disruption

Outlines

Day 1:

 

TRANSFORMERS CLASSIFICATION & TYPES

  • Construction (shell type and core type)
  • Classification and type in relation to insulation, windings, core, cooling
  • Voltage level, sizing, tank and breathing action
  • Transformer parts

TRANSFORMER THEORY & BASICS

  • Electrical values and their definition in a power transformer
  • Voltage, current, number of turns, impedance and their interrelation.
  • Equivalent Circuit
  • Voltage Regulation
  • Efficiency & Connections

Day 2:

 

TRANSFORMERS SPECIFICATIONS

  • Design criteria
  • Specifications

TRANSFORMERS INSTALLATION

  • Indoor installation
  • Outdoor installation
  • Building dimensions of transformer station

Day 3:

 

TRANSFORMER TESTS

  • Power factor tests (insulation, oil, and bushings)
  • Single phase excitation current test
  • Transformer turns ratio test
  • Insulation resistance test
  • Dielectric absorption test
  • Polarization index test

 

OPERATION

  • Thermal performance
  • Paralleling Operation
  • Tap-changing connections
  • Vector groups

Day 4:

MAINTENANCE

  • Preventive Maintenance
  • Routine Maintenance
  • Shut-down Maintenance

 

PROTECTION

• Surge protection

• Protective relaying (differential, over-current and earth fault)

• Buchholz relay and pressure relief relay

• Thermal devices and instruments (oil temperature alarm and trip, winding

 

Day 5:

 

FAILURES & CAUSES

  • Insulation Failure
  • Temperature Failure
  • Load Failure

 

CLOSING & DISSCTION

Who Should Attend

  • Power System Engineers & Technicians
  • Electrical Engineers & Technicians
  • Consulting Engineers & Electrical Contractors
  • Tradesman Electricians
  • Electrical Inspectors
  • Utility Engineers & Technicians

Duration

5 Days

Start Date End Date Country City

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