×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Submarine cables to use for transmission

Submarine cables to use for transmission

Submarine cables to use for transmission

(OP)
Here is some information:

An island that utilizes 13.2 kV lines would like to lay submersible cable to transmit power to an island that is approximately 20km away. The depth of the water is between 150-200 meters deep. What is the best submersible cable for this scenario?

RE: Submarine cables to use for transmission

The best? Cheapest? Most reliable? Bullet proof reliability?
We used direct burial cable to feed an island about 300 meters off shore. the cable was three twisted conductors; each conductor being lead sheathed, paper insulated and PVC jacketed.
The cable was purchased on the surplus market.
The cable was jetted a foot or so below the surface with divers using "T" nozzles to give protection from dragging anchors.
I doubt that you will find 20 km of any type of cable on the surplus market. You are most likely looking at a special purchase and custom mill run.
A more robust construction for submarine cable consists of a concentric wrap of steel rods for mechanical protection. The sample I saw used rods about 1/4 inch in diameter, wrapped to give 100% coverage.

Bill
--------------------
"Why not the best?"
Jimmy Carter

RE: Submarine cables to use for transmission

13.2kV seems like an awfully low voltage for such a long run; have you considered stepping up to a higher voltage? At a high voltage you'll be able to use a smaller conductor and you'll have better voltage regulation across the range of minimum to maximum load.

RE: Submarine cables to use for transmission

(OP)
I'd like to know what the best, most reliable cables would be feasible for this type of project. I agree about the 13.2 kV lines, just wanted to put a little information about what nominal voltage is used on the main island. The smaller island is currently being supplied by 2- 100 kW gensets. With the cost of shipping fuel, spare parts, and maintenance, we are looking into using submarine cables to supply power from the main island. We are currently doing a cost analysis to see if it is feasible.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources