Extruded Underground Transmission: Design, Installation & Operation

INDUSTRY NEED

Extruded cable systems, primarily cross-linked polyethylene (XLPE), are increasingly the cable of choice for new underground transmission throughout the world.  These systems offer several advantages over older paper-insulated pipe-type and self-contained cables but require special consideration to properly design, successfully install, and ensure long-term operation.  This course will focus on these areas to give the student much of the required background needed to apply extruded transmission cables. 

COURSE OBJECTIVE AND SUMMARY

This course will present characteristics of extruded cable systems as compared to other cable types, as well as discuss differences between transmission and distribution voltages where extruded cables have seen applications for 30-40 years.  The design studies needed for extruded cables will be discussed, along with installation, operation, maintenance and testing. 

Expected Learning Objectives / Outcomes

PDC has identified learning objectives we expect each student to obtain on completion of this course.  The student completing this course should be able to:

  1. Have a general understanding of the major components of an extruded cable system including the cable insulation, cable conductor, splices and terminations.
  2. Discuss and describe the types of installation methods that might be used with extruded cable systems
  3. List the types of testing that is done on an extruded cable system and when in a cable project these tests might be performed


WHO SHOULD ATTEND

The course will be valuable to engineers responsible for planning, operating or designing extruded cable systems.  


PREREQUISITES

An engineering degree, preferably in power engineering, is desirable.


Course Outline

Monday

Day 1

 

8:00am

Continental Breakfast

 

8:30am

Introduction, Course Objectives

Bascom

 

History of Extruded Cable Systems & Comparison to Other Transmission Cable Types

Bascom

 

Cable Materials and Components

·         Conductor Types and Construction

·         Extruded Insulation Materials and Characteristics

Bascom

10:30am

Break

 

 

Cable Engineering Design Studies

·         Electrical Stress

·         Ampacity

·         Impedances

·         Pulling Tensions

Bascom

12:00noon

Lunch

 

 

Sheath & System Grounding Design Considerations

·         Materials

·         Induced Voltages & Currents

·         Sheath Bonding Schemes

·         Sheath Voltage Limiters

Cooper

2:30pm

Break

 

 

Extruded Cable Industry Standards and Specifications

Cooper

 

Manufacturing & Quality Control

Cooper

 

Course Adjourns

 

Day 2

 

7:30am

Continental Breakfast

 

8:00am

Extruded Cable Accessories

·         Joints

·         Terminations

·         Cross Bonding Boxes

Cooper

10:30am

Break

 

 

Installation Considerations

·         Installation Types (Direct Buried, Duct, Trenchless, Submarine)

·         Duct Materials and Characteristics

·         Trenching vs. Trenchless and Impact of Casing Selection

Bascom

12:00

Lunch

 

 

Installation Considerations Continued

·         Thermal Backfill Selection and Impact on Design & Installation

Bascom

2:30

Break

 

 

Extruded Cable Installation Photos/Video

 

 

Course Adjourns

 

Day 3

 

7:30

Continental Breakfast

 

 

Testing

·         Type / Qualification Tests

·         Routine Tests

·         Sample Tests

·         Commissioning Tests

Cooper

10:30

Break

 

 

Operation & Maintenance Considerations

Cooper

12:00

Lunch

 

 

Extruded Transmission Cable Project Timeline

Bascom

 

Temperature Monitoring of Extruded Cables & Ampacity

 

2:15

Break

 

 

Special Topics Based Upon Class Interests

 

 

Course Adjourns

 


Arrangements

This course will be held at the:

Alden Beach Resort
5900 Gulf Boulevard
St. Pete Beach, FL 33706

A block of rooms has been reserved at the hotel at a special rate which will be honored for several days before and after the course.  Reservations must be  made 30 days in advance to obtain this low rate.   Please mention the PDC Ampacity Course when you make reservations.  The hotel is on the Gulf of Mexico, near many restaurants, etc.


Instructors:

Earle C. (Rusty) Bascom, III, Senior Engineer, Power Delivery Consultants, Inc.  Mr. Bascom specializes in the analysis and design of underground transmission cable systems, including extensive work with extruded transmission cable systems, both from analytical studies and in specifications.  He has worked on extruded transmission cable projects for voltages up to 345kV and has developed several of PDC's software tools for evaluating these cable systems.

John H. Cooper , Principal Engineer, Power Delivery Consultants, Inc., has worked for Westinghouse for several years, including as manager of the Waltz Mill Test Facility in Pennsylvania.  He later operated this site for the Electric Power Research Institute (along with the Yonkers Lab).  Mr. Cooper has done extensive work in the analysis, design, specification, factory testing, and commissioning of extruded cable systems over the last 40 years and is active in both IEEE and CIGRE.

 


Continuing Education Units

PDC is a Continuing Education Provider in the State of Florida and is accredited with the International Association of Continuing Education and Training (IACET) and will issue students a course certificate indicating the number of Continuing Education Units for the course completed based on national guidelines and the number of classroom hours.  1.8 Continuing Education Units (CEUs) will be awarded for successful completion of this course.  The CEU is the nationally recognized unit for recording participation in noncredit educational programs.  One CEU is equal to ten classroom hours.


Tuition and Enrollment:

The tuition covers the cost for this three-day course and includes extensive course notes, continental breakfast and lunch.  Each participant will be furnished a bound set of notes.  Included will be an extensive bibliography and selected technical papers.   Lodging, transportation, and other meals are not included. 


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