Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi all! We have been experiencing an issue on site where threads have been missing the latest postings. The platform host Vanilla are working on this issue. A workaround that has been used by some is to navigate back from 1 to 10+ pages to re-sync the thread and this will then show the latest posts. Thanks, Mike.
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Detecting cut cable

  • 04-04-2021 11:18am
    #1
    alan4cult
    Registered Users, Registered Users 2 Posts: 1,583 ✭✭✭


    Is there any device that will detect a cable cut, similar to a device in an alarm circuit.

    Example: if I cut an outdoor cable, I will probably trigger the RCD but it's not guaranteed that it will. I'm looking for a device that would detect that current is not travelling to the other end. Does such a device exist that would then disconnect the power?


Comments

  • #2
    Henry.
    Closed Accounts Posts: 26 ✭Henry.


    alan4cult wrote: »
    Is there any device that will detect a cable cut, similar to a device in an alarm circuit.

    Example: if I cut an outdoor cable, I will probably trigger the RCD but it's not guaranteed that it will. I'm looking for a device that would detect that current is not travelling to the other end. Does such a device exist that would then disconnect the power?
    When you say current, how much ?


  • #3
    punisher5112
    Registered Users, Registered Users 2 Posts: 24,644 ✭✭✭✭punisher5112


    Cut off power so if it's still live you don't get a bang off it.....

    There are cable finders for buried cables, I actually have 2 industrial ones but well out of date on commission.

    Were you digging?


  • #4
    Henry.
    Closed Accounts Posts: 26 ✭Henry.


    Of the top of my head ,the 2 basic ways im familiar with is

    Monitoring at the origin using current sensing, that requires a connected load

    Monitoring at the remote end, that requires a separate pair to monitor the voltage (?) at the remote end

    You can probably do the latter monitoring wirelessly

    Probably other methods available


  • #5
    alan4cult
    Registered Users, Registered Users 2 Posts: 1,583 ✭✭✭alan4cult


    punisher5112 wrote: »
    Cut off power so if it's still live you don't get a bang off it.....

    There are cable finders for buried cables, I actually have 2 industrial ones but well out of date on commission.

    Were you digging?
    No no I'm not digging, I'm more curious if such a device exists. SWA should trigger an RCD due to either a neutral/earth fault or a line/earth or line/netural but it also may not. If it's a perfect cut with a non metallic object


  • #6
    brightspark
    Registered Users, Registered Users 2 Posts: 2,637 ✭✭✭brightspark


    Something like this, though it would be dependant on a reasonably constant load.
    (often used to detect failure of heating circuits)

    https://ie.rs-online.com/web/p/monitoring-relays/8577075/?cm_mmc=IE-PLA-DS3A-_-google-_-CSS_IE_EN_Relays_Whoop_HI-_-(IE:Whoop!)+Monitoring+Relays-_-8577075&matchtype=&pla-356934343345&gclid=CjwKCAjwx6WDBhBQEiwA_dP8rfokc0hm1pWhswEvAMe2wITdcaQoc9n4suk0dRX6jKK-0pLvpD1hExoC1b0QAvD_BwE&gclsrc=aw.ds


  • Advertisement
Advertisement