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Onan LT II Transfer Switch JB 7.5


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  #71  
Old 10-23-2017, 10:50:02 AM
EICBob EICBob is offline
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Default Re: Onan LT II Transfer Switch JB 7.5

Hi JohnnyC
I may have a time delay relay that I am no longer needing. It is white instead of red, and I am not totally sure of the time range, but you are welcome to have it if you think it will be of any value. I do know that it came from stock at my old job when we decommissioned an old Kohler standby plant.

-Bob
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  #72  
Old 10-23-2017, 07:16:18 PM
JohnnyC JohnnyC is online now
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Default Re: Onan LT II Transfer Switch JB 7.5

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Originally Posted by EICBob View Post
Hi JohnnyC
I may have a time delay relay that I am no longer needing. It is white instead of red, and I am not totally sure of the time range, but you are welcome to have it if you think it will be of any value. I do know that it came from stock at my old job when we decommissioned an old Kohler standby plant.

-Bob
Many Thanks! I may take you up on your offer and will compensate you.

I highly doubt a Kohler part will be a direct fit, but I can "Frankenstein" the Kohler part to work with the Onan configuration.

The most important thing to ensure compatibility is your relay must work with 120 vac. I can mix and match PC boards and the coil/relay to make it work. Likewise with the relay's base. As for time delay, 1 to 2 minutes is good, but if you are not sure I may be able to modify your relay to work to my specs.

If you can post your relay's part number, I may be able to get information about it over the internet and I may drop in on the Kohler forum on the Stak (do they welcome an Onan guy?).

I posted several pictures below showing my time delay relay. Again the base and over looks don't matter, I just need the electronics that control the time delay and it must be able 120 vac compatible. The rest I can Frankenstein the Onan and Kohler pieces together and make it work.

Thanks,
JohnnyC
New Jersey
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  #73  
Old 10-24-2017, 06:13:45 PM
EICBob EICBob is offline
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Default Re: Onan LT II Transfer Switch JB 7.5

Hi JohnnyC
I have 2 time delay relays. One is a 24 volt DC coil and the other is a 120 VAC coil.
See attached pictures. Both relays were used in ATS units in my prior employment.
They both use Octal sockets. One bring an 8 pin and the other a 10 pin.
I recall the 24 VDC relay was in the Kohler and that ATS used all low voltage DC coils.
The 24VDC relay is 1 to 180 second and the 120VAC is 1 to 15 minutes.

-Bob
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  #74  
Old 10-25-2017, 06:01:06 AM
JohnnyC JohnnyC is online now
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Default Re: Onan LT II Transfer Switch JB 7.5

Quote:
Originally Posted by EICBob View Post
Hi JohnnyC
I have 2 time delay relays. One is a 24 volt DC coil and the other is a 120 VAC coil.
See attached pictures. Both relays were used in ATS units in my prior employment.
They both use Octal sockets. One bring an 8 pin and the other a 10 pin.
I recall the 24 VDC relay was in the Kohler and that ATS used all low voltage DC coils.
The 24VDC relay is 1 to 180 second and the 120VAC is 1 to 15 minutes.

-Bob
Hi Bob, the 24vdc relay has the correct time delay specs, but obviously the wrong circuitry voltage so that won't work. The other relay has the correct circuity voltage, but a higher minimum time delay however it will work .
I will have to change the socket configuration as I expected.

I will send you a PM later today. I just seen your reply as I was ready to run out the door to work at 6:00 am.

Thanks,
JohnnyC
New Jersey
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  #75  
Old 10-25-2017, 12:43:13 PM
EICBob EICBob is offline
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Default Re: Onan LT II Transfer Switch JB 7.5

Hi JohnnyC
You could always build a small power supply to run the 24vdc relay or use a discarded wall wart to do the same thing. As I recall the ATS running that Kohler, it was not a Kohler branded ATS, had a very nice full wave DC supply built in to handle the relays and some remote monitoring sensors that the TV station required.
Stay dry!
-Bob
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  #76  
Old 10-26-2017, 07:12:04 PM
JohnnyC JohnnyC is online now
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Default Re: Onan LT II Transfer Switch JB 7.5

Quote:
Originally Posted by EICBob View Post
Hi JohnnyC
I have 2 time delay relays. One is a 24 volt DC coil and the other is a 120 VAC coil.
See attached pictures. Both relays were used in ATS units in my prior employment.
They both use Octal sockets. One bring an 8 pin and the other a 10 pin.
I recall the 24 VDC relay was in the Kohler and that ATS used all low voltage DC coils.
The 24VDC relay is 1 to 180 second and the 120VAC is 1 to 15 minutes.

-Bob
Hi Bob, hold off from sending anything yet..... I was researching these type of relays and for what Onan (or Ebay sellers of NOS Onan) charges for a single relay that can be as high as $500, I can buy similar from Grainger and other retailers for $60 or LESS. In some cases as low as $28.The ONLY thing I see to be different is the non-Onan branded relays for sale all have octal sockets like yours whereas I need multi-pin square socket type configuration. I am looking for a relay with the correct time delay specs for my needs. I am almost certain I can Frankenstein the new relay with the Onan square socket base for only pennies compared to spending as high as $500 for an NOS Onan branded relay.

I will post more information as I learn more on the replacement relays.

Thanks for your generous offer!

JohnnyC
New Jersey
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  #77  
Old 10-26-2017, 07:53:28 PM
EICBob EICBob is offline
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Default Re: Onan LT II Transfer Switch JB 7.5

Hi JohnnyC
You and I were doing the same thing, looking at other ways to skin the proverbial relay cat. You are most welcome for the offer, was the least I can do for all the assistance I have received recently on my 2 generator projects.
Good luck on your quest and the offer still stands if you need.

-Bob
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  #78  
Old 10-26-2017, 09:52:44 PM
Steve Dawkins Steve Dawkins is offline
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Default Re: Onan LT II Transfer Switch JB 7.5

Johnny, here are a couple of pages from a timing relay catalog. I have bought many controls from them. This relay won't be stocked, but you can order one through one of their distributors, such as Allied Electronics. The cost will probably be a little over $100.

I don't know if you got the PM I sent regarding repairing your old relay.

The scans didn't upload. File size exceeds site limits.

Last edited by Steve Dawkins; 10-26-2017 at 09:57:04 PM. Reason: Photos didn't upload.
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  #79  
Old 10-26-2017, 10:11:00 PM
JohnnyC JohnnyC is online now
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Default Re: Onan LT II Transfer Switch JB 7.5

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Originally Posted by Steve Dawkins View Post
Johnny, here are a couple of pages from a timing relay catalog. I have bought many controls from them. This relay won't be stocked, but you can order one through one of their distributors, such as Allied Electronics. The cost will probably be a little over $100.

I don't know if you got the PM I sent regarding repairing your old relay.

The scans didn't upload. File size exceeds site limits.
Steve, I did not receive your PM as seen in the screen print below. Maybe you accidently sent it to the wrong person? Or a glitch in the system here? Please try again.

Thanks,
John
New Jersey
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  #80  
Old 10-27-2017, 12:13:05 AM
Steve Dawkins Steve Dawkins is offline
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Default Re: Onan LT II Transfer Switch JB 7.5

I just sent you a PM.

Let's try it this way.

https://www.marshbellofram.com/diversified-electronics/

click: Time Delay Relays
click: TDC TUC Series On-Delay Relay Output
click: Download Catalog

Your relay will be model TDC120AKB30M. The "30M" is a delay range of 18 seconds to 30 minutes.
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