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91
Generators / Re: Voltage drop under load
« Last post by Johndoh on October 16, 2018, 01:32:35 PM »
Ok guys here's an update report. I had a spare AVR the black one in the link, unused from the land of "please be understanding" it wouldn't adjust, started at 280 volts ended 280 volts thats crap. I only just got the votmeter so I connected up the old AVR and played with it for a while. Turns out the frequency is better than the house by .5%. I did the other tests again and they are a little interesting in that they power is one way so red probe to neutral and black to earth shows voltage reversed they dont same with live to earth. live and neutral shows voltage and minus voltage. I touched it when it was running and lived!

Here is a link to the photographs https://www.dropbox.com/sh/h0ety3ppwht4wsm/AAAokl9kwbM1USKcSwwl2LvIa?dl=0

FG Wilson on generator earthing http://www.fgwilson.ie/files/generator-set-neutral-earthing.pdf
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Listeroid Engines / Re: The Listeroid Chronicles-WMO and Other Listeroid Modifications
« Last post by glort on October 16, 2018, 08:23:29 AM »

Almost 150k views of my/our BS .... Daaaaamn....
Here's to another 150k views, and another 850 replies!

As a YT Vid it would be a very successful one!

There are those that seem to think the off topic stuff does not belong but I think this thread and the whole forum in general proves  that it can be successful.
If one looks at the actual target content of the Forum, there would be lucky to be a dozen specific posts a week, if that.  I'm not sure the content matters as much as the participation.

This place would not be the same without you Ed and every time you go AWOL you are sadly missed.
93
+1 from me!

I know it's a 'Lister forum' but 'Man cannot live by bread alone'

Actually that probably explains the continuing development of the Runcible spoon.

Cheers
Stef
94
Engines / Re: going prices on lister ST2 engine ???????
« Last post by cobbadog on October 16, 2018, 06:32:33 AM »
G'Day Shawn,
Nice find and looks like an easy fix to them all. Not sure if another solenoid is easy to find for the one that is broken on the starter motor but well worth replacing as it would make it more desirable if you intend to sell it.
Pricing things can be a case of supply and demand. If there are a lot of people looking for one you can achieve a slightly better price. Do a search on the auction sites to see how many if any are up for grabs and how much. This can dictate selling price unless you ahve something in better shape or condition. You can do a test on each engine and make a list of repairs then cost those and then you can offer the same engine as is or repaired.
Just an idea!
Cheers John
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Generators / Re: Voltage drop under load
« Last post by glort on October 16, 2018, 02:00:07 AM »

I would also suggest if unmounting the AVR does not fix the problem, it may be worth buying another one and fitting that to test it. They are available for about $20 here so not expensive but it seems where Paul is things are a lot more pricey in freight if not the component itself.

The AVR could also be remotely mounted, say on a Control box with just the wiring extended.  I'd isolate that if it were in a metal box as well, wood one would be perfect, and if need be a small fan could be directed to blow on it.
I have a fan on my main inverter with a little temp switch running through a relay. When the inverter gets to 40C, the fan turns on blowing air down the back along the heat sink.  Electronics do not like heat and the cooler you keep them the happier they are.
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Generators / Re: Voltage drop under load
« Last post by EdDee on October 15, 2018, 11:38:40 PM »
Hi Paul,

Take care when working on it while it is running... Personally, I wouldn't earth it, for fear of a feedback loop and blowing the AVR, but that does present the possibility of 'shock hazard' if you touch ground and gen frame at the same time.

In this case, I would use utmost care, de-mount the AVR, install the small globe between N-E, then start it up... if the power fluctuates as before, shut it down immediately... Without touching metal on the gen if at all possible.. Dry leather glove or a good rubber glove recommended... The chances of killing yourself are slim, but hey, why take a chance if you are not familiar with the angry pixies...they might try and bite you!

If the power fluctuates with the AVR unbolted from the plate, I think you will need a pro to come take a gander... If the voltage is stable, we have found the problem....

Also, when you unmount the AVR for the test, stick it in a plastic container or something to insulate it and prevent it from touching other metalwork and  shorting out on something else...

Further, if this solves the problem, don't expect the 'AVR in a plastic box trick' to be a solution long term... it will need proper mounting without being enclosed for cooling...

Cheers
Ed
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Generators / Re: Voltage drop under load
« Last post by Johndoh on October 15, 2018, 11:15:19 PM »
Frequency measurement at the generator outlet is a bit hit and miss... there are quite a few stray magnetic fields and some minor harmonics on the lines up close... trust the frequency reading only when you have a bit of a load on it and you measure it 'at a distance' ...

Have you pulled the AVR off it's mounting plate yet to check for that suspected short?

Cheers
Ed

Hi Ed
I didn't do anything to it since. I will take a look tomorrow when I load it up to check frequency. Should I run an earth lead from the alternator to my earth stakes?

Paul
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Generators / Re: Voltage drop under load
« Last post by EdDee on October 15, 2018, 11:10:21 PM »
Frequency measurement at the generator outlet is a bit hit and miss... there are quite a few stray magnetic fields and some minor harmonics on the lines up close... trust the frequency reading only when you have a bit of a load on it and you measure it 'at a distance' ...

Have you pulled the AVR off it's mounting plate yet to check for that suspected short?

Cheers
Ed
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Generators / Re: Voltage drop under load
« Last post by Johndoh on October 15, 2018, 11:02:40 PM »
At last my new voltmeter has arrived! I plugged it into the house it showed 50.7 HZ I then plugged it into the generator and it's showing 57 HZ @ 3000 rpm, what should I do next??
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Listeroid Engines / Re: The Listeroid Chronicles-WMO and Other Listeroid Modifications
« Last post by EdDee on October 15, 2018, 11:02:15 PM »
I just noticed something.....

Those numbers next to this thread.... Views in particular.... Replies as well.... Are they correct? Almost 150k views of my/our BS .... Daaaaamn....

To all the infinitely tolerant moderators and admins out there, thanks for a great forum!

To all the rest of the lesser mortals who participate in the friendly banter, thanks for tolerating all my BS and being such good mates to an even lesser mortal such as myself!

Each and every one of you guys make it all worthwhile! Even old Glort, with his brash, Aussie "up yours" attitude, Dave, I hope one day to meet you face to face and shake you by the hand.


Here's to another 150k views, and another 850 replies!

Cheers
Ed
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