Ross,
You've got to define hum. A relay that is run off of an AC current can have
a VERY faint hum. A relay that is running on AC current when designed for DC
current has a distinctive 'hum' sometimes more similar to a high speed clicking.
Also a relay that has a coil nearing the end of it's life will 'hum' as defined
before. The best test I know of in this case is to observe the relay's contacts
(possible only on open frame relays) in the dark. If there is a faint arc
visible when the relay is suppose to be closed, it's time for a replacement.
Dick Goulet
BTW: Definition of 'VERY faint' is in a closed almost sound proof room with your
ear right next to the relay.
____________________Reply Separator____________________
Author: "Mohan; Ross" <[EMAIL PROTECTED]>
Date: 1/24/2002 7:15 AM
Is it natural for relays to hum?
-----Original Message-----
SO, what did you want?
Dick Goulet
Ancient Electronics Tech & tinkerer, Also certified relay NUT
____________________Reply Separator____________________
Author: "Adams; Matthew (GEA; 088130)" <[EMAIL PROTECTED]>
Date: 1/23/2002 10:30 AM
Sorry folks, that went to the wrong list. I apologize. We now return you to
your
regularly scheduled Oracle discussion.
----
Matt Adams - GE Appliances - [EMAIL PROTECTED]
> -----Original Message-----
> From: Adams, Matthew (GEA, 088130)
>
>
> Anybody got a EE or electronics background?
> I've got a question about relays.
> ----
> Matt Adams - GE Appliances - [EMAIL PROTECTED]
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Mohan, Ross
INET: [EMAIL PROTECTED]
Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
San Diego, California -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from). You may
also send the HELP command for other information (like subscribing).
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author:
INET: [EMAIL PROTECTED]
Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
San Diego, California -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from). You may
also send the HELP command for other information (like subscribing).
