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  #1  
Old 11-23-2020
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Buoy4AK Buoy4AK is offline
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Default Main A/C - Generator Selector Switch

I’m not even going to pretend I’m an electric guy (far from it), but in case anyone is interested I shot brief video of what the actual guts of the Generator/Shore Power switch looks like inside the panel. I had no idea it was so, well, big!

https://youtu.be/mIGaQ-teCzs
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Larry Hagen
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1986 FC35RB

Last edited by Buoy4AK; 11-24-2020 at 12:25 PM.
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  #2  
Old 11-24-2020
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CrashTestDummy CrashTestDummy is offline
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Wow! That is eye-opening. Thanks.
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Old 11-24-2020
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1984Lodge 1984Lodge is offline
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I am not sure if the OE was Krause Naimer.. but that is who makes those switches now. They are infinitely configurable. As an electrician, we find them in many switchgear for lots of different uses. Generally for selecting voltage and current readings on a meter etc. They use a central shaft and then each module is screwed onto the shaft. Each module can be selected to open or close at a position of the handle. I do not doubt that bluebird ordered these switches to their configuration from a manufacturer similar to this.



Here is the Kraus Naimer website with what would be used to replace these switches:
https://www.krausnaimer.com/us_en/pr...screw-terminal

Here is the catalog that gives you an idea of how configurable these switches are:
https://flippingbook.krausnaimer.com/KN100GB/11/#zoom=z
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Jeff LoGiudice
Jeff@GinosGarageUSA.com
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1984 Bluebird PT40
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& 1986 MCI 102A3
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http://www.bbirdmaps.com/index.cfm #460
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Old 11-24-2020
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Jeff, Have you ever dismantled and repaired a Switch??
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Old 11-24-2020
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Randy Dupree Randy Dupree is offline
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i sold or gave an old burned up switch to Ralph F a long time ago,he said he used it for parts and rebuilt another one.
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Old 11-24-2020
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Quote:
Originally Posted by Bill Pape View Post
Jeff, Have you ever dismantled and repaired a Switch??
I have had ones apart from switchgear.. but not one from a Wanderlodge, yet. I am sure I they could be fixed if you can get parts for them. They are modular.. so like Randy said if you have old one for parts etc. The big thing with these is whether they are getting corroded or are the contacts in them getting welded due to switching them under load. I do not recommend switching these under load. They can handle a small amount of load but the rating is how much goes through the contacts not the amount of load that can be switched, that is a different number if any is allowed at all.
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Jeff LoGiudice
Jeff@GinosGarageUSA.com
Temple Terrace, Florida
1984 Bluebird PT40
#F063411 6V92TA & MT654CR
& 1986 MCI 102A3
6V92TA & HT740 (Sold)
YouTube-Gino's Garage https://www.youtube.com/user/xjrjeff
http://www.bbirdmaps.com/index.cfm #460
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Old 11-24-2020
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Quote:
Originally Posted by 1984Lodge View Post
I have had ones apart from switchgear.. but not one from a Wanderlodge, yet. I am sure I they could be fixed if you can get parts for them. They are modular.. so like Randy said if you have old one for parts etc. The big thing with these is whether they are getting corroded or are the contacts in them getting welded due to switching them under load. I do not recommend switching these under load. They can handle a small amount of load but the rating is how much goes through the contacts not the amount of load that can be switched, that is a different number if any is allowed at all.
Good to know Jeff! I’ve probably been doing it wrong, when I fire up the genset I leave the selector off then switch to generator after it’s running (which now seems like a bad idea). What do you recommend for procedure when starting the generator? Maybe turning off the AC panel master breaker instead, or maybe just leaving everything on & starting under a load (which also feels like a bad idea)?

Thanks for the feedback!
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Old 11-24-2020
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I was able to disassemble and repair the switch in the 78 BB. I have a short write-up here on WOG.
I put the switch to off then start the GEN let it warm up then turn to GEN, back to off then shut down.
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Old 11-24-2020
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Quote:
Originally Posted by Buoy4AK View Post
Good to know Jeff! I’ve probably been doing it wrong, when I fire up the genset I leave the selector off then switch to generator after it’s running (which now seems like a bad idea). What do you recommend for procedure when starting the generator? Maybe turning off the AC panel master breaker instead, or maybe just leaving everything on & starting under a load (which also feels like a bad idea)?

Thanks for the feedback!
So here are the procedures I use when transferring using the switch:

If you are connecting to shore power or park power:

(If you do not have a power protection device, you may want to check the park pedestal with a meter etc to verify proper power from park outlet. Please only use a meter if you know how to use if properly and safely!)

1.Turn off the breaker at the park power pole.
2.Turn off all your major loads inside the bus, A/C's, water heater etc. the battery charger etc is ok. You could also just flip the main breaker here.
3. Connect your shore power cord and turn the selector switch to 50a or 30a whichever you cord you are connecting.
4. Turn on the park pedestal breaker.
5. Check your polarity meter to make sure power is good.
6. Turn on your loads A/C's etc. Turn on main breaker if you switched it off.

To transfer to generator:
1. Make sure the transfer switch is not on generator yet.
2. Start the generator and let it run for a minute, make sure oil pressure etc is ok.
3. Turn off all the major loads A/C's water heaters etc..as before the small load of battery chargers is usually ok as most take a minute to start drawing load anyways. Could turn off main breaker here.
4. Turn switch to generator, and then start to turn on loads one at a time with a little bit of time in between to let the generator catch up. If you turned off the main breaker, make sure you bring loads in one at a time when on generator power, so turn off all the breakers and bring them in one at a time.
(note its important to not start the generator with large loads turned on, they could see low voltage for the time it takes the generator to get up to speed and some items may not like this and it could damage them)

Transfer from generator back to shore:
1. Turn off all large loads.
2. Turn off park power breaker.
3. Connect shore cord 30a or 50a whichever you have.
4. Switch transfer switch to the 30a or 50a, depending on what you connected to.
5. Turn on park power breaker.
6. Check your polarity meter to verify power.
7. Turn on loads A/C etc.
8. Let generator cool down and then shut it down.
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Jeff LoGiudice
Jeff@GinosGarageUSA.com
Temple Terrace, Florida
1984 Bluebird PT40
#F063411 6V92TA & MT654CR
& 1986 MCI 102A3
6V92TA & HT740 (Sold)
YouTube-Gino's Garage https://www.youtube.com/user/xjrjeff
http://www.bbirdmaps.com/index.cfm #460
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  #10  
Old 11-24-2020
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Bless my automatic transfer switch lol.

The rotary power switch is common and on Amazon. The contactors are easy out of old AC condensers or cheap online.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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