If you have a new account but are having problems posting or verifying your account, please email us on [email protected] for help. Thanks :)
Hello All, This is just a friendly reminder to read the Forum Charter where you wish to post before posting in it. :)
Hi all, The AutoSave Draft feature is now disabled across the site. The decision to disable the feature was made via a poll last year. The delay in putting it in place was due to a bug/update issue. This should serve as a reminder to manually save your drafts if you wish to keep them. Thanks, The Boards Team.
Hello all! This is just a quick reminder to 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.

Arcing relays on gate controller

  • 22-08-2019 10:35am
    Registered Users Posts: 2,668 ✭✭✭ exaisle

    I have a electric gate controller which stopped working last week. On examination of the main circuit board in the controller, it was obvious that the contacts on two relays were arcing, judging by the black on the inside of the plastic relay housing.

    On further examination, it also appears that the resistors which are part of the (I assume) snubber circuit which is intended to prevent arcing were both open circuit so this is most likely the cause of the arcing on the relays.

    The load on each relay is a Fadini Hindi 880 which is rated 230v at 1.2Amps.
    The resistor and capacitor in the snubber circuit are 82ohms (0.5 watt) and 0.1 microfarads (275vac) respectively.

    I'm wondering if there's any way of beefing up this circuit to prevent a repeat in the future.

    Unfortunately my multimeter can't check capacitance but I'm going to replace the capacitors anyway.

    The arcing seems to be a common problem as I have acquired another Fadini Elpro 13 with exactly the same issues.

    Any help greatly appreciated.



  • Posts: 0 [Deleted User]

    Diodes make better snubbers than resistors.

    Is it switching AC or DC? Usually DC is more of an issue than AC.