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#171503 - 11/29/07 05:42 PM Kohler Generator 120V, 7.5KW  
Frank Cinker  Offline
Member
Joined: Jul 2001
Posts: 311
Pennsylvania
We have a 40 year old, 120 volt, 7.5 KW, (62.5A) Kohler transfer switch at one of our facilites. The generator operates fine but the automatic transfer switch needs replaced. Are 7.5 KW (62.5A) 120 volt transfer switches manufactured now days?

Frank


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#171506 - 11/29/07 08:51 PM Re: Kohler Generator 120V, 7.5KW [Re: Frank Cinker]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,826
Brick, NJ USA
Frank:
Did you try Kohler.com, or look for a local Kohler Gen dealer/service shop & inquire.



John

#171507 - 11/29/07 08:51 PM Re: Kohler Generator 120V, 7.5KW [Re: Frank Cinker]  
sparkyinak  Online Content
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Joined: Jul 2007
Posts: 1,322
Alaska


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#171533 - 11/30/07 07:20 AM Kohler Generator 120V, 7.5KW [Re: sparkyinak]  
Frank Cinker  Offline
Member
Joined: Jul 2001
Posts: 311
Pennsylvania
Thank you for the link,however I couldn't find any 120V rated automatic transfer switches listed. Could I use a 120/240V rated switch for my 120V application?


#171538 - 11/30/07 01:04 PM Re: Kohler Generator 120V, 7.5KW [Re: Frank Cinker]  
JValdes  Offline
Member
Joined: Jun 2007
Posts: 301
South Carolina
If you cannot find one, build one. Do you have someone in your company that can do this? It's a simple project.


#171539 - 11/30/07 02:17 PM Re: Kohler Generator 120V, 7.5KW [Re: JValdes]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,080
Estero,Fl,usa
JV
Wouldn't the lack of a U/L evaluation (or other NRTL) be a problem?

It might be cheaper/easier to fix the one he has. What's wrong with it? Are the parts available?
It is possible a "120v" version is just a 240 with some contacts removed. For that matter I am not really sure why you couldn't just use the 240v version and not hook up one phase. The function is the same.


Greg Fretwell

#171549 - 11/30/07 05:23 PM Re: Kohler Generator 120V, 7.5KW [Re: gfretwell]  
Frank Cinker  Offline
Member
Joined: Jul 2001
Posts: 311
Pennsylvania
Greg,

Considering it is 40 years old, our plan is to replace it. My initial thought was, why wouldn't a 120/240V switch work. But just to be sure I called the Kohler generater local distributer in my region. I expect a return call when I get to my office on Monday.

Frank


#171597 - 12/01/07 02:38 PM Re: Kohler Generator 120V, 7.5KW [Re: Frank Cinker]  
JValdes  Offline
Member
Joined: Jun 2007
Posts: 301
South Carolina
gfretwell,
I guess I am just so used to building my own stuff. Working primarily in industry for the last 18 years, I just always built my own control panels and rewired many machines. Once I learned to draw my own schematics and implementing them, I just never purchased factory built equipment in most cases. And when your company knows you can do it, you are doing it.
You are right about the 240 volt, same thing. I also, wonder what is wrong with the old one. Maybe the 40 year old enclosure is the issue. Who knows.
As far as UL approved I am not sure how that plays out in a plant. We kinda always figured if it was on our side, we could do pretty much anything we wanted. Of course we always put safety first. Mechanical, electrical interlocks, Emergency controls etc....


#171602 - 12/01/07 03:52 PM Re: Kohler Generator 120V, 7.5KW [Re: JValdes]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,080
Estero,Fl,usa
I am not a code cop, I just play one on the internet wink

To be honest, I have built a lot of stuff around my house too but I do try to make it as code compliant as possible, just to make it easy when I am gone.
I was just trying not to say he would be "fine" cobbling something up in the shop.
I agree if you used listed components within their parameters it should be safe.


Greg Fretwell

#171603 - 12/01/07 04:03 PM Re: Kohler Generator 120V, 7.5KW [Re: gfretwell]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,080
Estero,Fl,usa
Frank, if they faxed you a page of "instructions" on company stationary saying you could hook up one phase (120v) to the switch you should be OK, no matter how pedantic an inspector was.


Greg Fretwell

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