This 57-minute DVD covers the basic principles of operation of pad-mounted transformers and switchgear, the types of equipment that are in common use, and how they are connected. It also presents the basic principles of pad-mounted transformer and switchgear inspection and troubleshooting, and shows an example of how to detect a problem with one leg of a three-phase transformer.
Pad-Mounted Transformers - 12 minutes
Describes the general construction and features of a pad-mounted transformer.
Pad-Mounted Transformer Installation - 7 minutes
Describes an installation procedure for a three-phase, pad-mounted transformer that includes the following steps: site preparation, transformer installation, and testing.
Troubleshooting a Three-Phase Transformer, Part 1 - 13 minutes Defines and describes the symptoms of: one leg open, ferroresonance, off-ratio winding, and open neutral.
Troubleshooting a Three-Phase Transformer, Part 2 - 6 minutes Demonstrates how the troubleshooting process can be used to isolate the cause of a problem in a three-phase, pad-mounted transformer.
Pad-Mounted Switchgear - 11 minutes
Identifies two types of pad-mounted switchgear. Describes the use of pad-mounted switchgear to sectionalize and isolate a URD system. Describes typical physical and operational checks for pad-mounted switchgear.
Pad-Mounted Switchgear Operation - 8 minutes
Demonstrates the use of pad-mounted switchgear to sectionalize and isolate equipment in an underground feeder system.