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.