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 > HF Predator mod to parallel

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DPGBG

Pa

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Posted: 11/16/15 11:32am Link  |  Quote  |  Print  |  Notify Moderator

Hi all. I pretty much gave up on this project. Anyway, I thought I would add a bit as I try to catch up. I have tried so many different options that it's tough to follow. At the end, I eliminated the factory plugs just to get some of the confusion out of it. I was just working from the 4 post on the terminal block. added some fuses and a single plug. Which still didn't work. The unit is not neutral bonded in the head, it gets the neutral bond after the terminal block. That said, I believe the AVR needs to see the bond. As soon as I separate the neutrals the voltage is gone. I'm thinking a different AVR would be needed and unless one can be found real cheap, it's probably not worth it.

I replaced the stock fuses with true 20 amp fuses and genny does what I need it too. Ran it several weekends now and have had no issues. Load still draws form one side of windings, but hasn't caused any problems yet.

I would still be interested in a conversion if anyone can come up with one..

hope that helps a bit..

MrWizard

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Posted: 11/16/15 01:33pm Link  |  Quote  |  Print  |  Notify Moderator

Did you try it out with the last wiring diagram I made


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LittleBill

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Posted: 11/17/15 05:52pm Link  |  Quote  |  Print  |  Notify Moderator

elim3000 has a switch and switches the windings. i have pulled over 24 amp from it before





DPGBG

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Posted: 11/18/15 10:54am Link  |  Quote  |  Print  |  Notify Moderator

MrWizard I tried so many combinations. I'm not sure if I did this one or not, but will give it a try this weekend. Can you let me know how I would do this with adding a external plug. meaning not using the plugs from the genny. This is easier to test as I don't have to pull the panel apart. I just work from the terminal block.

Thanks

MrWizard

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Posted: 11/18/15 11:12am Link  |  Quote  |  Print  |  Notify Moderator

Connect the windings on the terminal block
Disconnect the wires going to the old plugs
Connect the new external plug to the altered wiring on the terminal block

cbeam2

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Posted: 11/22/15 07:21am Link  |  Quote  |  Print  |  Notify Moderator

What about a parallel harness like they do with the Honda generators?

MrWizard

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Posted: 11/22/15 11:09am Link  |  Quote  |  Print  |  Notify Moderator

No, that will fry something, in one or both generators
With standard synchronous generators,
You have to get both generator heads in phase
Think..turbines in a power plant
Dan near impossible with this type of generator
Takes specialized equipment

Gdetrailer

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Posted: 11/22/15 03:02pm Link  |  Quote  |  Print  |  Notify Moderator

cbeam2 wrote:

What about a parallel harness like they do with the Honda generators?


The only consumer gens which are designed to be paralleled are inverter types which A Honda 2000i is.

The gen the OP is dealing with is an old school non inverter gen.

This gen is designed to be able to supply 240V and 120V, The full wattage only available via the 240V connection..

The 120V connections only give you half the wattage.

This is due to the gen having a winding which is 240V and there is a center tap. The 120V is derived due to the center tap.

The problem the OP is having is they want ALL the wattage on one 120V output.

The only way to do this is to separate the windings of the gen head at the center tap.

Only then can the two 120V windings can be paralleled.

The problem is that the way the AVR is wired may be causing an issue since the AVR is sampling a small voltage from one of the windings..

This can be done in most cases but it is not easy or for the faint of heart.

Starcraft21SSO

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Posted: 10/29/20 11:51am Link  |  Quote  |  Print  |  Notify Moderator

DPGBG wrote:


What I have tried was to switch the wires as explained in the 3000W Chinese Gensets Info. topic on this site. I do that and I get 20 volts across the two outputs. I also read that if you get 0 to 50ish volts to switch a set of leads. I didn't try this and I'm not 100% clear on which two leads to switch??


The AVR is holding the voltage down. What is happening is explained here:

https://www.youtube.com/watch?v=zSpkvS3ha1Q


2002 Starcraft TravelStar (21SSO) Hybrid TT


MEXICOWANDERER

las peƱas, michoacan, mexico

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Posted: 10/29/20 12:24pm Link  |  Quote  |  Print  |  Notify Moderator

You need to fully develop "load sharing" before thinking about frequency synchronization. If your true inverter prime mover senses frequncy inbalance, it shuts down. Good luck with that. If the HF had a truely accurate governor then you might have a chance with a paralelling system. The results do not match the cost of time and materials.

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