Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 12-29-2014, 02:56 PM   #1
Senior Member
 
JBDISCOVERY's Avatar
 
Join Date: Mar 2011
Posts: 455
Need some help-generator/transfer switch

Hello friends,
We have a 1999 Discovery with an Onan Lp generator and intellitec transfer switch.
When using the generator, the transfer switch will not engage.
I tested the generator voltage at the input to the switch. It ranged up and down from 112 to 122 volts within 10 sec or so. Does the Intellitec transfer switch block a transfer if the generator voltage is not stable. Think it should.
Regards. Appreciate your help and greatly appreciate IRV2.
JimB
__________________

__________________
JBDISCOVERY is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 12-30-2014, 11:36 AM   #2
Senior Member
 
BFlinn181's Avatar
 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 16,264
You didn't provide the model number of your Intellitec transfer switch, so it's hard to give a complete answer. Generally, a transfer switch just senses a power source and switches to it. Intellitek does make a transfer switch with an EMS (energy management system) built in to them, usually with a display panel to show what it's measuring. The voltages you report are not outside the limits of normal U.S. 120 v AC power, so I'm not sure even if you had an EMS built in it would have stopped power pass through.

With everything unplugged, I'd start by checking the contact points of the actual relay and all connections to the switch. Those big, multi-strand cables can loosen in normal use and need to be re-torqued occasionally.
__________________

__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is online now   Reply With Quote
Old 12-30-2014, 12:45 PM   #3
Senior Member
 
hammer55's Avatar
 
Join Date: Mar 2014
Location: California, Central Valley
Posts: 268
Send a message via Skype™ to hammer55
usually a transfer switch will work when it senses a loss of power from the main power source, if the main power from the house or pole from the park is lost, then the switch will take place, but not all have this capability, most are for when power is restored from the main source, so when you are running your generator and the coach is sill plugged in, it keeps the two sources from being energized at the same time, but still, some coaches do not switch power, they just keep to two sources from powering at the same time, a lot are a manual engage from what I ever had, but I never had a real good motor home, not that I wouldn't love one, my retirement does not afford me that great of a rig
__________________
Everyday is a holiday, and every meal a banquet 2014 Coachman Pursuit 27KB
hammer55 is offline   Reply With Quote
Old 12-30-2014, 02:13 PM   #4
Senior Member
 
Join Date: Feb 2010
Posts: 4,493
Most ATS switch when they see power on the backup source as no need to draw power in normal mode.

Inspect your ats to locate exact model then google it it get manual so you can confirm how it should work.

Carefully open the ats and locate the generator input and then start generator to verify the voltage.
__________________
Tony & Lori
1989 Country Coach Savannah SE
TQ60 is offline   Reply With Quote
Old 12-30-2014, 05:56 PM   #5
Senior Member
 
GaryKD's Avatar
 
Newmar Owners Club
Join Date: Jul 2006
Location: Wellington, Florida
Posts: 12,325
Hi JBDISCOVERY,
Dumb question, did you measure the voltage outbound from the transfer switch (TS) when the generator is running and warmed up? The voltages mentioned in the OP are within USA specs. I doubt the TS cares what the voltage is going through it as long as there is enough voltage to sense shore power.

Many transfer switches default to the generator so there is no engaging of the TS. When on shore power, one will hear a "click" indicating the engaging of the transfer switch for shore power. When on shore power, do you hear a "click" from the TS?


When running the generator, if you have power incoming to the TS and no power out going from the TS check the contacts. Make sure the solenoid/relay has disengaged (assuming the TS is not engaging for generator and engaging for shore power).
__________________
Gary
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
GaryKD is offline   Reply With Quote
Old 12-30-2014, 06:07 PM   #6
Senior Member
 
palehorse89's Avatar


 
Newmar Owners Club
Join Date: Oct 2009
Posts: 7,777
There should be 2 sets of "contactors" one set for the genset, and the other for shore power......genset takes priority....... both make "click-clunk" noise when the coil pulls the contacts together.......
Gary, Many transfer switches default to the generator so there is no engaging of the TS.....
when the genset is started, and the transfer switch does not engage, how does the Coach get powered up?

Complete Name: Intellitec Transfer Switches
Brief Information: 50 Amp Transfer Relay Switch - Single Input
The 50 amp Transfer Relay is used to transfer the power source of a coach between the shore power and the generator. Power from the shore power cord is fed to the normally closed contacts of two contactors. This allows the power from both lines of the shore cord to pass through into the coach distribution panel.

Power from the generator is fed to the normally open contacts and to a delay circuit on the printed circuit board. When the power from the generator is applied, the delay circuit senses the power from Line 1 and applied DC power to the contactor coils, after approximately 15 seconds. This pulls in the two contactors, applying the power from the generator to the coach.
__________________
2000 Newmar MADP 4060, 350ISC, Spartan MM, IFS 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006Ultra & 1989 Springer
palehorse89 is offline   Reply With Quote
Old 01-04-2015, 11:38 AM   #7
Member
 
BigDBright's Avatar
 
Join Date: Mar 2014
Location: Bakersfield, CA
Posts: 67
I recently changed the automatic transfer switch in our coach, which while tedious, wasn't too difficult. After I was done, an old timer suggested what I thought was a brilliant solution for next time. Simply hard wire a female receptacle on the generator output. If you're running on the gen, plug your shore power cord into the gen. If you're on shore power, unplug from the gen and plug into the post. Nothing to fail, no expensive parts to buy.
By the way, if you decide to change the ATS, use your phone camera to take lots of pics of wire placement so you don't stress trying to remember what wire went where.
__________________
Duane and Peggie
2000 Itasca Horizon 36LD, 300 HP Cat
Learning the ropes, and feeling the burn!
BigDBright is offline   Reply With Quote
Old 01-04-2015, 11:48 AM   #8
Senior Member
 
BFlinn181's Avatar
 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 16,264
Quote:
Originally Posted by BigDBright View Post
I recently changed the automatic transfer switch in our coach, which while tedious, wasn't too difficult. After I was done, an old timer suggested what I thought was a brilliant solution for next time. Simply hard wire a female receptacle on the generator output. If you're running on the gen, plug your shore power cord into the gen. If you're on shore power, unplug from the gen and plug into the post. Nothing to fail, no expensive parts to buy.
By the way, if you decide to change the ATS, use your phone camera to take lots of pics of wire placement so you don't stress trying to remember what wire went where.
That 'old timer' was simply explaining how almost all RVs with generators were wired before the common use of auto transfer switches. The money you save by yanking the defective ATS and putting in an outlet instead of a new ATS will probably be lost on the sale of the RV.
__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is online now   Reply With Quote
Old 01-04-2015, 12:13 PM   #9
Senior Member
 
GaryKD's Avatar
 
Newmar Owners Club
Join Date: Jul 2006
Location: Wellington, Florida
Posts: 12,325
Hi palehorse89,
To answer your question, the transfer switch is in the normally non-energized position. Which means the contacts providing power from the generator are closed. If the TS does not sense shore power, nothing is energized in the TS. Same if the TS senses power from the generator. Without being energized, power flows through the contacts (normally closed) supplying power from the generator to the coach. Power from the generator means no clicks, clunks or any noise from the TS. If there is no power from the generator and the TS senses shore power, the TS is energized and the "clunk/click" is heard. The normally open contacts are now closed. Power flows from the shore pedestal to the coach.
__________________
Gary
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
GaryKD is offline   Reply With Quote
Old 01-04-2015, 12:16 PM   #10
Senior Member
 
jacwjames's Avatar
 
Monaco Owners Club
Join Date: Jun 2014
Posts: 4,598
I would never substitute my transfer switch for manual plugs although this was how my Class C was wired.

I guess we've become spoiled. We also have automatic generator start in the event of a power failure. We travel with dogs and have to have the coach cool, so when hooked to shore power and it fails the generator will come on if the set point for the temperature is met.
__________________
Jim J
2002 Monaco Windsor 38 PKD
2005 Jeep Grand Cherokee w/5.7 Hemi
jacwjames is offline   Reply With Quote
Old 01-04-2015, 12:17 PM   #11
Senior Member
 
BFlinn181's Avatar
 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 16,264
My ATS doesn't connect to the generator until a delay to allow gennie to start without a load on it and gets up to proper RPM. There is a clunk when hooking up to shore or gennie.
__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is online now   Reply With Quote
Old 01-04-2015, 01:41 PM   #12
Senior Member
 
palehorse89's Avatar


 
Newmar Owners Club
Join Date: Oct 2009
Posts: 7,777
Quote:
Originally Posted by GaryKD View Post
Hi palehorse89,
To answer your question, the transfer switch is in the normally non-energized position. Which means the contacts providing power from the generator are closed. If the TS does not sense shore power, nothing is energized in the TS. Same if the TS senses power from the generator. Without being energized, power flows through the contacts (normally closed) supplying power from the generator to the coach. Power from the generator means no clicks, clunks or any noise from the TS. If there is no power from the generator and the TS senses shore power, the TS is energized and the "clunk/click" is heard. The normally open contacts are now closed. Power flows from the shore pedestal to the coach.
As far as I know, there are 2 contactors, genset/inverter, shore power, if the contactor for the genset is NC , with no switching(no click/clunk), when shore power is present, would it not be back feeding the genset? And conflicting when plugged in and one starts the genset. Are they switching the genset's neutral wire for isolation with the contactor? Interested and learning......... I always thought both contactors were NO till commanded to close by the pickup coils........and other governing features.......that control the transfer switch.
__________________
2000 Newmar MADP 4060, 350ISC, Spartan MM, IFS 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006Ultra & 1989 Springer
palehorse89 is offline   Reply With Quote
Old 01-04-2015, 05:47 PM   #13
Senior Member
 
GaryKD's Avatar
 
Newmar Owners Club
Join Date: Jul 2006
Location: Wellington, Florida
Posts: 12,325
Hi palehorse89,
I do not know how to explain this any different than I have. I'm an ME not an EE. The bottom line is the complete set of contacts for the generator are on the normally closed side. The complete set of contacts for shore power are on the normally open side. Only one set of contacts can be engaged.

I haver a surge protector on the shore side and the generator has a built in delay on its' side. I have watched the TS for both shore and generator sourced power. I am communicating what I see/hear. Not much else to say.
__________________
Gary
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
GaryKD is offline   Reply With Quote
Old 01-04-2015, 06:28 PM   #14
Senior Member
 
palehorse89's Avatar


 
Newmar Owners Club
Join Date: Oct 2009
Posts: 7,777
Quote:
Originally Posted by GaryKD View Post
Hi palehorse89,
I do not know how to explain this any different than I have. I'm an ME not an EE. The bottom line is the complete set of contacts for the generator are on the normally closed side. The complete set of contacts for shore power are on the normally open side. Only one set of contacts can be engaged.

I haver a surge protector on the shore side and the generator has a built in delay on its' side. I have watched the TS for both shore and generator sourced power. I am communicating what I see/hear. Not much else to say.
Thank you Gary
__________________

__________________
2000 Newmar MADP 4060, 350ISC, Spartan MM, IFS 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006Ultra & 1989 Springer
palehorse89 is offline   Reply With Quote
Reply

Tags
generator, transfer switch



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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
Fleetwood Jamboree "Aux Battery" switch Dick Hale Class C Motorhome Discussions 4 11-17-2014 05:14 PM
2000 PA Mini Switch ??? Bilgerat Fleetwood Products Owner's Forum 9 10-26-2014 03:35 PM
Anybody add a second generator starting switch? Bob86ZZ4 RV Systems & Appliances 23 06-04-2014 08:58 AM
12 volt on/off switch by the door caninecop Tiffin Motorhomes Owners Forum 4 02-24-2014 09:02 AM
Suburban limit switch? Ron Burgundy RV Systems & Appliances 5 02-15-2014 04:51 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 01:15 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.