Possible incompatibity between gennie and battery charger
Submitted: Sunday, May 21, 2006 at 14:42
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LHOTH
I have a Projecta 3500 mA battery charger in our bus. I have recently purchased an Engel SHX1000 generator to be used to charge batteries in bus. My system works
well on house power.I have a surge power board which it has two lights green /
orange latter for earth BUT when connected to genny
orange light does not come on and chargermake noises which in turn reduces the green charge light on charger back to
orange charging light on charger. What could it be?
Reply By: Geoff M (Newcastle, NSW) - Monday, May 22, 2006 at 09:58
Monday, May 22, 2006 at 09:58
Hi LHOTH,
Your statement, "BUT when connected to genny
orange light does not come on" pretty much sums up what I see as the problem.
Someone above mentions the term "floating earth" which I too believe is the problem. I know you mention you don't know what that means, that's fair maybe I can help.
I found the same problem with my Honda EU10i when using an ELCB (Earth Leakage Circuit Breaker) on the output of the generator. I wanted an ELCB to protect
mine and my mate’s children when using generators around
camp.
My solution was to create the same electrical installation on the generator as we use in our houses. Our houses use what’s called an MEN System (Multiple Earthing Neutral) a flash term for the neutral and the earth being joined together at the switchboard in every electrical installation.
My solution was to create a portable version of this for use ONLY ON THE GENERATOR, never to be used at
home. I have an inline ELCB which has a 3-Pin plug on one end and a 3-Pin socket on the other. I removed the moulded 3-Pin plug and replaced it with a new one, with one variation. I installed a
bridge wire between the NEUTRAL and the EARTH. You must be absolutely sure you have joined the Neutral and the Earth, NOT the Active and the Earth.
What this does is tie the earth to neutral just the same as a
home electrical installation. The earth is no longer “floating” in space it is “tied” to a reference voltage. In this case it is tied to the zero volts of the neutral.
I would strongly recommend using an ELCB with a
camp generator as the installation of extension leads and appliances around
camp is never perfect.
To make the installation even safer and more positive drive an earth stake into the ground next to your generator and wire the stake to the earth terminal on the Engel. As a side note, the only way you can get approval to use a generator on a
mine site is with an earth stake and ELCB as I’ve described above.
Geoff.
| Geoff,
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Follow Up By: Member - Beatit (QLD) - Monday, May 22, 2006 at 12:14
Monday, May 22, 2006 at 12:14
G'day Geoff,
Thanks for that, I was wondering why my ELCB wasn't working in the camper and now I know. As I use a 2 way switch to change from genie to mains in the camper (when at
home) - I have a 3 way charger connected all the time to keep the batteries topped up. Can this earth/neutral
bridge occur in the male plug at the genie end? I have a simple male plug to connect the genie in case I want to remove it from the camper so this makes for the best place if it makes sense.
Kind regards
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Follow Up By: Geoff M (Newcastle, NSW) - Monday, May 22, 2006 at 12:36
Monday, May 22, 2006 at 12:36
Hi Beatit,
“Can this earth/neutral
bridge occur in the male plug at the genie end?”
Yes, best spot for it. But once you do put the
bridge in, make sure the lead is used only for this purpose.
“I have a simple male plug to connect the genie in case I want to remove it from the camper so this makes for the best place if it makes sense”
Yep, does make sense.
First and only thing plugged into my Honda is the 3-Pin plug with the
bridge in it.
Geoff.
| Geoff,
Landcruiser HDJ78,
Grey hair is hereditary, you get it from children. Baldness is caused by watching the Wallabies.
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Follow Up By: Member - Beatit (QLD) - Monday, May 22, 2006 at 13:35
Monday, May 22, 2006 at 13:35
Hi Geoff,
Thanks mate, another job before I go camping next time.
Kind regards
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