Contact US

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!

*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

Detection relay of change of state

Detection relay of change of state

Detection relay of change of state


We have an electrical substation and a generation power plant 600 meters away.
We need to detect the change of state of the contact of an electromechanical relay in the substation at the power generation plant in less than 30 miliseconds. Really, there are 10 discrete signals running each way.
For some weird circunstances we have an OPGW cable with monomode fiber due installed (i.e, patch panel, patch cords), and 30 spare available fibers, installed between the said locations,  and not possible to lay copper cables between them.
Relays will change of state 1 or 2 times in a day.
What could be a reasonable, cost and reability, solution?. What special precautions should be taken with the probable solutions?.  

RE: Detection relay of change of state

Hi sanaly,

I believe the only real solution you have, also considering your enviroment is to use a back to back teleprotection. should be able to transmit your signal in (lot) less then 30msec. And also these devices transmit with high security and reliability.
There are several available that can use OPGW OF among other solutions like PLC etc...



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! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close