More communities are seeking to underground existing overhead electrical distribution lines for a variety of reasons such as: reliability/storm hardening, visual reasons, new construction requirements and more. This course will review the fundamentals of underground distribution feeder design and operation by providing an in-depth look at underground systems, technology, construction, and operation. This is the ideal course for engineers and project managers new to underground distribution projects or anyone looking for a more in-depth look at underground distribution systems.
Learning Outcomes
- Expand on the various loop feed configurations used in underground systems
- Discuss the major material types used, when and why they are used in underground systems
- Review conductor types, applications and connecting systems used in underground systems
- List the differences, features, types and applications of distribution transformers
- Define the various type of pad-mount equipment and their applications
- Review the design and operation safety requirements for underground systems
- Discuss the typical fault types and other problematic issues for underground systems
TUESDAY, NOVEMBER 16, 2021 CENTRAL TIME
9:10 a.m. – 5:00 p.m.
Course Timing
Loop Feed Configurations
- Dip Poles
- Underground Feeders
Major Materials
Dead Front vs. Live Front (Legacy Equipment)
- Conductor
- Direct Buried (NESC Part II Sec 35)
- Installed in Duct
- Connecting Systems
- Molded Rubber Products
- 200a Load Break Elbows
- 600a Dead Break Connectors
- Feed thru Parking Bushings and Parking Stands
- Arresters
- Cable Splices
- Distribution Transformers
- Single and Three Phase
- Bay-o-net Fuses
WEDNESDAY, NOVEMBER 17, 2021 CENTRAL TIME
9:10 a.m. – 12:00 p.m.
Course Timing
Padmount Equipment
- Sectionalizing Cabinets
- Switching Stations
- Overcurrent Protective Equipment
- Automatic Throw Over Switchgear
- Voltage Regulators
- Capacitor Banks
Safety Considerations
- Design – NESC 2017 Part II Sections 30 – 39
- Sec 31 General Requirements
- Sec 32 Underground Conduit Systems
Operating Underground Distribution Systems