Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Replies 21 replies
  • Subscribers 36 subscribers
  • Views 2816 views
  • Users 0 members are here
Options
You may also be interested in

Supply failure warning device

Grumpy

Hi All,

The RCBO that supplies the compressor in my treatment plant tripped randomly the other day. As I have been doing some maintenance on it and subsequently monitoring it I noticed quite quickly. This was the first time it had tripped since installation 20 months ago and hasn't tripped again.

The RCBO is in a CU in the detached garage which itself is supplied via sub main direct off the incoming supply to the house.

So I thought some sort of monitoring device might be prudent. Originally I thought I could utilise a non maintained emergency light that I have kicking about but realised it wouldn't have enough life if the supply failed at night. I go into the garage daily but not necessarily first thing. Has anyone any (low cost) suggestions?

I'm thinking maybe batten lampholder, red lamp, supply from garage lighting circuit and, what, an NC relay with a supply from the outgoing terminals of the plant's RCBO?

We're not talking life critical, hospital standard here, but if the supply's off too long my poor little microbes suffer!

Thanks for any suggestions!

Parents
  • 0

    That is intended for two lamps, each of 20 watts,, by reducing the load from 40 watts to 4 watts,a run time of 24 hours should be achievable. A 12 volt 4 watt strobe lamp will be noticable even in daylight,.

  • 0 in reply to broadgage

    Well, three weeks and a new compressor later and having spent a lot more time with my head in a treatment plant that most would consider less than ideal I'm going for Broadgage's suggestion.

    So, as I'm unfamiliar with these things BG could you suggest links for both the non maintained EM and the replacement leds that would be suitable?

    Most obliged!

    G

Reply
  • 0 in reply to broadgage

    Well, three weeks and a new compressor later and having spent a lot more time with my head in a treatment plant that most would consider less than ideal I'm going for Broadgage's suggestion.

    So, as I'm unfamiliar with these things BG could you suggest links for both the non maintained EM and the replacement leds that would be suitable?

    Most obliged!

    G

Children
  • 0 in reply to Grumpy

    The older (NOT LED) version of this sort of back up light usually called a "twinspot" no longer made, but plenty out there..

     

    are little more than a lead acid battery and charger module, and a pair of car fog lamps in a box, and a relay that changes state when the mains drops. Some pics inside an open one here

    By removing the original filament lamps (that really are 20 odd watts - same bulb as a car indicator... ) can be replaced by anything else that will run  from a 12V battery. The LED lamps made for cars are ideal, as they are far lower power, but are of course also intended for a 12V lead acid battery.

    Quite literally, cut off the original lamps, and fit the load of your choice,

    https://led.me.uk/12v 

    or leave them on, and  just fit the LED bulb that matches the original lamp base,

    (https://www.ringautomotive.com/en/12V-car-led-bulbs )

    Mike.

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines