Transformer Troubleshooting

SKU: TDTTR00CENDuration: 60 Minutes

The purpose of this course is to teach techniques for troubleshooting single-phase transformers and three-phase transformer banks. The course demonstrates how to identify a faulted transformer. It also demonstrates how to isolate transformers and how to test for proper no-load voltage. At the conclusion of this course, participants should be able to identify a faulted single-phase transformer, isolate it, and test it for proper no-load voltage. They should also be able to identify a faulted transformer in a three-phase transformer bank, isolate the faulted transformer, and test it for proper no-load voltage.

Course Details

Specs

Training Time: 60 minutes

Compatibility: Desktop Only

Based on: Industry Standards and Best Practices

Languages: English

Learning Objectives

  • Introduction to Transformer Troubleshooting
  • Describe different types of transformer connections.
  • Describe the basic differences between completely self-protected (CSP) transformers and conventional transformers.
  • Protective Devices
  • Describe some overcurrent protective devices that are used with transformers.
  • Describe some overvoltage protective devices that are used with transformers.
  • Transformer Problems
  • Describe typical causes of transformer outages.
  • Describe general considerations involved in responding to a trouble call.
  • Describe potential sources of back feed.
  • Isolating and Testing Single-Phase Transformers, Part 1
  • Describe how to isolate and test a typical wye-connected conventional transformer.
  • Describe special considerations associated with isolating and testing a delta-connected conventional transformer.
  • Isolating and Testing Single-Phase Transformers, Part 2
  • Describe how to isolate a typical CSP transformer.
  • Describe how to test a typical CSP transformer.
  • Troubleshooting Three-Phase Banks
  • Identify ways that single-phase transformers can be banked together.
  • Define the following terms: “poletop arcing” and “sympathetic tripping.”
  • Describe how to isolate and test a typical three-phase transformer bank.
  • Temporary Service Restoration
  • Describe one way that temporary service can be restored in a single-phase application
  • Describe one way that temporary service can be restored in a three-phase application.
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