Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 16-12-2015, 15:54   #1
Registered User
 
Dreaming Yachtsman's Avatar

Join Date: Nov 2005
Location: Kennewick, WA
Posts: 490
Images: 5
Send a message via Skype™ to Dreaming Yachtsman
Mystery Trip - 3.0A Breaker on NL M673L.3 Genset

Recently while I was off the boat, the generator was running to power air conditioning. The wife noticed that the A/C was no longer working so she shut down the genset. When I got back to the boat, I found the 3.0A circuit on the control panel tripped. That breaker supplies the Automatic Voltage Regulator (AVR). I reset the breaker and restarted the generator, which has worked normally since.

My question is: What could cause this breaker to trip?
Is this a situation that will come back to bite me?
__________________

__________________
John
Formerly S/V Yachtsman's Dream
Go sailing now. Life is too short not to enjoy it.
Dreaming Yachtsman is offline   Reply With Quote
Old 16-12-2015, 16:27   #2
Guy
Registered User

Join Date: Feb 2013
Location: So. Oregon, USA
Boat: Seafarer36c
Posts: 4,308
Re: Mystery Trip - 3.0A Breaker on NL M673L.3 Genset

Quote:
Originally Posted by Dreaming Yachtsman View Post
My question is: What could cause this breaker to trip?
Is this a situation that will come back to bite me?
I don't think you can ever go on just 1 trip unless it's the first time you turn it on or it's a spaceship. 2 trips, then you have something.
__________________

__________________
Guy is offline   Reply With Quote
Old 16-12-2015, 17:37   #3
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,068
Re: Mystery Trip - 3.0A Breaker on NL M673L.3 Genset

Unless or until it starts tripping again, your faced with the trouble shooters dilemma, I can't fix what ain't broke


Sent from my iPad Pro using Cruisers Sailing Forum
__________________
a64pilot is offline   Reply With Quote
Old 17-12-2015, 05:14   #4
Registered User
 
transmitterdan's Avatar

Join Date: Oct 2011
Boat: Valiant 42
Posts: 4,030
Re: Mystery Trip - 3.0A Breaker on NL M673L.3 Genset

These small breakers are usually the thermal type. They can gradually reduce their tripping current over time. Also, high heat in the genset compartment can make them trip. Vibration is also something that can cause degradation.

Recommend you get a spare breaker and keep it on hand then I would just continue to watch the old one. I might even try to measure the current in the old breaker to see if it is close to 3A (like 2.5A). But it isn't always easy to make that measurement. If it trips again and you are on site check the temperature around the genset. It could be some air passage has become blocked with debris or possibly some insect has built a nest. If the air temperature is normal then I would replace the breaker and hold the old one as a spare. If the new one trips then you have to do some more troubleshooting.
__________________
transmitterdan is offline   Reply With Quote
Old 19-12-2015, 15:41   #5
Registered User
 
Dreaming Yachtsman's Avatar

Join Date: Nov 2005
Location: Kennewick, WA
Posts: 490
Images: 5
Send a message via Skype™ to Dreaming Yachtsman
Re: Mystery Trip - 3.0A Breaker on NL M673L.3 Genset

Thanks for the responses. The generator was operating in unusually warm conditions so it is entirely possible that the ambient heat contributed to its trip. Now I need to figure out how to get a replacement breaker.
__________________
John
Formerly S/V Yachtsman's Dream
Go sailing now. Life is too short not to enjoy it.
Dreaming Yachtsman is offline   Reply With Quote
Old 19-12-2015, 17:13   #6
Registered User

Join Date: Jun 2009
Location: still in a roll of fiberglass around Cape Town
Boat: Leopard 40 (new model)
Posts: 1,202
Re: Mystery Trip - 3.0A Breaker on NL M673L.3 Genset

Quote:
Originally Posted by Dreaming Yachtsman View Post
Recently while I was off the boat, the generator was running to power air conditioning. The wife noticed that the A/C was no longer working so she shut down the genset. When I got back to the boat, I found the 3.0A circuit on the control panel tripped. That breaker supplies the Automatic Voltage Regulator (AVR). I reset the breaker and restarted the generator, which has worked normally since.

My question is: What could cause this breaker to trip?
Is this a situation that will come back to bite me?
You are not the first one. According to some literature from NL the "AVR circuit breaker protects your generator from overload damage." Therefore it is fair to assume that there was an overload event.
__________________

__________________
svlamorocha 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
My 20 Amp Breaker Keeps Popping and Shutting Down Genset Turtlep Electrical: Batteries, Generators & Solar 4 26-07-2012 14:23
Switch in Off Position Causes Breaker to Trip Patrick_DeepPlaya Electrical: Batteries, Generators & Solar 6 03-08-2009 05:19
parallel a circuit breaker skyking2 Electrical: Batteries, Generators & Solar 13 03-11-2006 23:00
source for RCBO? aka GFCI breaker Ryan Electrical: Batteries, Generators & Solar 1 11-08-2005 09:55
Breaker Recall GordMay Construction, Maintenance & Refit 0 05-08-2003 11:05



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 02:44.


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.