piclist 2001\01\29\062445a >
Thread: 2.5KW Load
face BY : Michael Rigby-Jones email (remove spam text)

> -----Original Message-----
> From: Vasile Surducan [SMTP:@spam@vasilespam_OUTspamRemoveMEL30.ITIM-CJ.RO]
> Sent: Monday, January 29, 2001 10:43 AM
> Subject:      Re: [PIC]: 2.5KW Load
> > According to Peter L Peres this relay will also be hot after 30
> minutes...Is
> > it a better option to look at bidirectional power MOSFET modules then?
> >
>   I have doubts you can't find a good relay. However you may use a trick,
> power the relay coil through one of his normal closed contacts, on the
> normal open one put a resistor to V+. When the relay is on his coil will
> be powered with just a fraction on V+ enough to keep relay closed but less
> with about 30% thermal stress. Much cheaper than a MOSFET modules.
> Vasile
This assumes the relay armature has enough momentum to actually reach the
normally open contact after the normally closed contact has broken.  If not
you will have a nice buzzer!  A better method may be to just use the
normally closed contacts with a resistor wired accross them.  At least the
coil will still have some current after the contacts have broken.


http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.


See also: www.piclist.com/techref/microchip/devices.htm?key=pic
Reply You must be a member of the piclist mailing list (not only a www.piclist.com member) to post to the piclist. This form requires JavaScript and a browser/email client that can handle form mailto: posts.
Subject (change) 2.5KW Load

month overview.

new search...