Course ID
TDC10
COURSE DESCRIPTION
This course describes methods that can be used to troubleshoot two types of problems that may affect URD systems: transformer faults and cable faults.
COURSE GOALS
- Describe the layout of a typical underground residential distribution system.
- Describe methods that can be used to troubleshoot transformer faults.
- Describe methods that can be used to troubleshoot cable faults.
- Identify equipment used in the troubleshooting process.
SUBJECTS AND OBJECTIVES
Isolating Transformer Faults
- Describe the layout of a typical underground residential distribution (URD) system.
- Describe how to troubleshoot a transformer fault in which only the transformer primary fuse is blown.
- Describe how to troubleshoot a transformer fault in which the rise pole fuse is blown, but the transformer primary fuse is intact.
Isolating Cable Faults – Part 1
- Describe how to troubleshoot a cable fault in a system equipped with cable fault indicators.
- Identify three common types of cable fault indicators.
- Describe how to troubleshoot a cable fault by isolating and testing one section of cable at a time starting at the normally open point in the loop.
- Describe how to troubleshoot a cable fault by isolating and testing one section of cable at a time starting at a blown riser pole fuse.
Isolating Cable Faults – Part 2
- Describe how to troubleshoot a cable fault by re-energizing one section of cable at a time.
- Describe how the area to be isolated and tested for a cable fault in a URD system can be reduced.
- Describe the major difference between troubleshooting a transformer fault or a cable fault in a three-phase system and troubleshooting a transformer fault or a cable fault in a single-phase system.
- Describe how to troubleshoot a cable fault using a radar fault locator.
Specialty Package