Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 07-02-2011, 14:56   #1
Registered User

Join Date: Feb 2011
Location: London
Boat: Beneteau 47.7
Posts: 93
Hot Relay

I have been having problems with charging my house bank of batteries and have now discovered that my main relay had gone and looked a little old anyway:
I have now replaced and surprised that it gets quite hot when running the engine for a period of time.
Is this normal..?
I have been told that this is quite normal as it is taking quite a few amps hence the size of the relay.
Sorry for the lack of information but a slight novice at the engineering side.
Cheers nick
__________________

__________________
Tomtom39 is offline   Reply With Quote
Old 07-02-2011, 15:12   #2
Senior Cruiser
 
Blue Stocking's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: St. Georges, Bda
Boat: Rhodes Reliant 41ft
Posts: 4,117
What function is this relay performing? Where in the system is it located?
__________________

__________________
so many projects--so little time !!
Blue Stocking is offline   Reply With Quote
Old 07-02-2011, 15:17   #3
Registered User

Join Date: Feb 2011
Location: London
Boat: Beneteau 47.7
Posts: 93
Hi thanks for the quick response.
It is located on the charging side of the 12 volt system. So in short I have the small relay at the back of the alternator that tells this big relay to open or close to send charge to the batteries and it is this big relay that gets a little hot. It has 2 large gauge red cables which run directly to the battery banks .
Thanks
Nick
__________________
Tomtom39 is offline   Reply With Quote
Old 08-02-2011, 13:34   #4
֍֎֍֎֍֎֍֎֍֎

Cruisers Forum Supporter

Join Date: Apr 2006
Posts: 13,056
Sounds like a continuous duty solenoid which is part of an external regulator function. If it is rated for continuous duty, there should be no problem, assuming "hot" isn't too hot to keep bare flesh against it.
__________________
hellosailor is offline   Reply With Quote
Old 08-02-2011, 13:45   #5
Moderator Emeritus
 
David M's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: San Francisco Bay
Boat: research vessel
Posts: 10,153
You may want to consider changing it out for a combiner or an isolator....something designed for charging both banks and yet keeps the house and staring banks isolated when necessary. Having this automated is a nice thing to have.

Just wondering, is what you are talking about possibly a battery combiner? If so, it should not be getting real hot to the touch.
__________________
David

Life begins where land ends.
David M is offline   Reply With Quote
Old 08-02-2011, 14:28   #6
Registered User

Join Date: Feb 2011
Location: London
Boat: Beneteau 47.7
Posts: 93
Thanks for the really informative responses. I was told that I could swap out for an automated battery switch/charge regulator but where I am in the Caribbean right now would be very costly so will wait until back in the uk.
Currently a nice lot of amps going in to both banks and seems to be regulating nicely when close to full by dropping the input of amps.
Thanks again
Nick
__________________
Tomtom39 is offline   Reply With Quote
Old 08-02-2011, 14:52   #7
Freelance Delivery Skipper..
 
boatman61's Avatar

Community Sponsor
Cruisers Forum Supporter

Join Date: Jan 2010
Location: PORTUGAL
Posts: 20,226
Images: 2
pirate

Check out prices in St Maarten.... they beat most places including the UK on prices for a hell of a lot of gear
__________________


Born To Be Wild
boatman61 is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
12vdc Power Transfer Switch / Relay local343 Electrical: Batteries, Generators & Solar 0 11-01-2011 21:50
Warm Cubic Relay Wakadui Electrical: Batteries, Generators & Solar 2 08-09-2010 09:43
Rewiring Relay Circuit Boards svcattales Electrical: Batteries, Generators & Solar 19 31-08-2010 06:20
Voltage Sensitive Relay Nyssa Electrical: Batteries, Generators & Solar 12 04-12-2008 14:21
charging relay for generator battery jerry f Electrical: Batteries, Generators & Solar 2 06-07-2005 05:05



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 13:33.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.