TRAINING COURSE:
Transformer Troubleshooting
Course Category: Transmission and Distribution
Course description: 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 syllabus:
- Describe different types of transformer connections
- Describe the basic differences between completely self-protected (CSP) transformers and conventional transformers
- 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
- 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
- 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
- Describe one way that temporary service can be restored in a single-phase application
*This course is discounted for NATE members.
