Transformer Troubleshooting

Code: TTRA
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Summary

This 53-minute DVD explains techniques for troubleshooting single-phase transformers and three-phase transformer banks. How to identify a faulted transformer. Demonstrates how to isolate transformers and how to test for proper no-load voltage. How to identify a faulted single-phase transformer, isolate it, and test it for proper no-load voltage.


Training Sessions

  • Introduction to Transformer Troubleshooting – 4 minutes Describes different types of transformer connections. Describes the basic differences between CSP transformers and conventional transformers.
  • Protective Devices – 11 minutes Describes some overcurrent and overvoltage protective devices used with transformers.
  • Transformer Problems – 5 minutes Describes typical causes of transformer outages, general considerations involved in responding to a trouble call, and possible sources of backfeed.
  • Isolating and Testing Single-Phase Transformers, Part 1 – 7 minutes Describes how to isolate and test a typical wye-connected conventional transformer. Describes special considerations associated with isolating and testing a delta-connected conventional transformer.
  • Isolating and Testing Single-Phase Transformers, Part 2 – 9 minutes Describes how to isolate and test a typical CSP transformer.
  • Troubleshooting Three-Phase Banks – 7 minutes Identifies ways that single-phase transformers can be banked together. Defines poletop arcing and sympathetic tripping. Shows how to isolate and test a typical three-phase transformer bank.
  • Temporary Service Restoration – 8 minutes Describes one way temporary service can be restored in a single-phase or three-phase application.

Support Materials Available

Student workbook, instructor guide.