time delay relay

May 03, 2009 12 Replies

Any of the knowledgeable posters to this NG know where to source an encapsulated 230v delayed-on relay?



I've just re-installed the heat pump for the swimming pool - it's been stood idle for the last 12 years! The manufacturer has long-since ceased trading (it was a company RSD from Alton in Hants).



It used to work once upon a time, but won't fire up now. I have a service manual of sorts, and looking at the rather elementary wiring diagram, it looks as though the delay-on timer is shot. Nothing will work until the timer cuts in. There's a power-on light, and that's lit up, otherwise nothing!



Ideally I'm looking for a fixed time (5-8 minutes would be ideal) unit with flying leads, say 3" long, that can be wired in place of the existing timer. Spade connectors would suffice, with shielded spades.



Google gives me two or three manufacturers in the US, but nothing I can track down in the UK.



It's always worth checking Ebay - I've found all sort of useful electronic components there at very acceptable prices. Alright some of them are coming in from China but I've never had any problems with that.

Rob

Would item 260400961413 on Fleabay be worth a punt?

In message , The Wanderer writes

"Five minute delay timer" brings up loads of hits

OK, but this is a DIY group...

Is it not possible to devise some kind of mounting to be able to use commonly-available parts? Perhaps saw a short length of DIN rail to suit? Heck, even RTV the damn thing to the back of the enclosure.

Perhaps a photo of the physical constraints?

I've used similar devices before, and I have to say, 'RS' and 'DIN Rail' were the first thing that sprang into my mind whan I saw your post. Is it not possible to adapt something off-the-shelf like this?

Goto Farnell, search for "Delay Timer, select "On Delay", and you get to 105 products, one of which is an Omron device

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which uses an 11 pin round connector, the connectors are also available, and can be bolted onto any metal plate available. If, when, the timer goes wrong in the future you unplug it, bin it and plug in a new one. Easy Peazy !! Pricey though !

Could you not just slap it in an enclosure:

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We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember The Wanderer saying something like:

Stick it in a Hagar box.

Thanks for the replies. The key word was encapsulated. It's going in a fairly hostile environment that is also fairly restricted for space.

There's the Amperite ST1 which is a solid state delayed-on relay - you can't get much more encapsulated than that (except it has exposed spade terminals - one pair for the load, one pair for a delay-setting pot or resistor)

You could just ask the US Manufacturer if they'll send you one in the post so you can "test it before speccing it in a large project that will need hundreds ;-)". For something that small and light, it shouldn't be too difficult.

Depends on how restricted your space is I guess. No room for a weatherproof enclosure like?:

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