Re: Delay on a mains-powered relay?

From: Ross Herbert (rherber1_at_bigpond.net.au)
Date: 01/07/05 

Date: Fri, 07 Jan 2005 12:43:18 GMT

On Fri, 07 Jan 2005 12:35:17 GMT, Ross Herbert
<rherber1@bigpond.net.au> wrote:

>On Thu, 06 Jan 2005 16:00:50 GMT, "NSM" <nowrite@to.me> wrote:
>
>>
>>"Ross Herbert" <rherber1@bigpond.net.au> wrote in message
>>news:8lspt09p3gsrc8f30pu2tedr2ci59ti863@4ax.com...
>>
>>| It seems to me that the OP would prefer to use what hardware exists
>>| now in order to minimise expense and the complexity involved in a
>>| complete re-design of what he now has. The relay he is using now is a
>>| 3 pole changeover unit so depending upon what is currently connected
>>| to the relay contacts will have some bearing on what he can do in the
>>| easiest and most cost effective manner.
>>
>>...
>>
>>I remember small, inexpensive delays that used an AC clock motor to wind
>>them up. When the power went off they ran down and switched contacts. I
>>suggested that previously.
>>
>>N
>>
>Granted, such a device will work but it is hardly an elegant technical
>solution. The whole idea of technology in industry is to make the
>operation and maintenance of equipment reliable as possible without
>having to worry about remembering to "wind up that timing relay".

PS. Not having seen one of these wind up relays I suppose it would be
possible for it to be automatically wound up again by a motor when
power was restored.

Relevant Pages

  • Re: Delay on a mains-powered relay?
    ... >>| to the relay contacts will have some bearing on what he can do in the ... inexpensive delays that used an AC clock motor to wind ... When the power went off they ran down and switched contacts. ... Not having seen one of these wind up relays I suppose it would be ...
    (sci.electronics.design)
  • Re: Wind energy a boon for farmers - tenfold returns !
    ... Farmers welcome the second income these offer. ... wind generation of electricity has nearly quadrupled over ... Profitable wind power ...
    (sci.physics)
  • Re: Wind energy a boon for farmers - tenfold returns !
    ... Farmers welcome the second income these offer. ... wind generation of electricity has nearly quadrupled over ... Profitable wind power ...
    (sci.energy)
  • Re: John K. Sutherland demolishes the economics of wind power.
    ... who believe that wind power is a key to any rational social ... If each windmill were to operate at full power for the entire year, ... nuclear or coal, or hydro. ... Similar projects with similar very high costs relative to nuclear ...
    (sci.energy)
  • FIGHTING FOR ENERGY INDEPENDENCE
    ... Fighting for America's Energy Independence ... The so-called wind production tax credit Dorgan was ... with power capacity equivalent to that of roughly six ... Costs and True Costs ...
    (sci.physics)
Loading