 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
johngoodman
Joined: 18 Sep 2006
Posts: 530
Location: GA
|
 Posted: Wed Feb 03, 2010 7:39 am Post subject: Contactor question |
 |
|
I've got a couple of continuous duty contactors from Spruce that have the single small post. When I installed them in a tight place, it was recommended that the cap side be placed down, which makes it look upside down to me. Anyway, I'm stumped by which side should have the hot wire. I believe it's the one closest to the small post. If power is on the other side, what happens? Will the contactor still close? Is reverse flow a bad thing?
John
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
|
_________________
#40572 Phase One complete in 2011 |
|
| Back to top |
|
 |
Bob Turner
Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA
|
| Posted: Wed Feb 03, 2010 10:16 am Post subject: Re: Contactor question |
|
|
The relay coil is internally wired to the Battery connection (the small post is grounded to complete the circuit) so it will only work one way. (No harm in reverse flow of the main current, that happens during battery charge; but the relay won't work if it's backwards.
Put an ohmmeter on the small post; the resistance to the battery terminal will be finite (maybe a few hundred ohms), the resistance to the other terminal will be infinite.
If the contactor is mounted upside down and its spring fails, the unit will be stuck "on". I think that's the only downside of mounting it inverted. For starter contactors people likewise worry that a high positive g maneuver might overpower the spring and energize the starter if it's upside down. I have no idea how many g's that takes.
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
|
_________________
Bob Turner
RV-10 QB |
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
