RE: Buzzing relays? Anyone help?

["Paul Gale" <groups@xxxxxxxxxxxxxxxx>]

I don't think you understood me :)

Do the relays have double poles i.e. do they have a common, normally closed
and normally open contacts? Or do they only have 2 contacts rather than
three (single pole, single throw)?

What I'm saying is, if they are like normal double pole single throw (I
think?) relays, You can connect them up so that the 'buzzing' happens when
the heating is on rather than off. The heating will work in exactly the
same way as it does now.

Do you have a link to any on-line info for these?

>From what you've said so far, I'm not convinced the buzzing comes from
any form of 'leakage current' - sounds more like the buzzing you'd get when
the coil is energised (this has nothing to do with whether the heating is
on or off). Of course, I've not seen the relays, so this could all be wrong
;)

Paul.



-----Original Message-----
From: mailinglists [mailto:mailinglists@xxxxxxx]
Sent: 22 January 2005 14:27
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] Buzzing relays? Anyone help?


> Oh, and are you sure the relays are actually off when buzzing?

Yes, they are definitely off when they buzz - the Central Heating
switches off...

> Maybe you have them connected so that the coil is energised to break
> the connection? Do the relays offer a NO AND NC contact?

No, it all works as planned. Relay on - Central heating on...

> Do they buzz when 'on' too?
>
No, when then heating comes on the buzzing stops. I'm guessing there's a
bit of AC voltage from the appliance modules, which is enough to buzz
the contacts, but not enough to actually close them....

Lee