Seeing as you lot are normally better than Google thought I'd ask here first....
I have a requirement to take a 12v power feed from my D3 with an isolated ground. The power feed isn't a problem, I already have TFC loom running from front to back that I can get power from but I how do I go about setting up the isolated ground? The End
15th Jun 2009 10:33 am
countrywide
Member Since: 16 Sep 2007
Location: UK
Posts: 6019
It's to power something than needs to have an isolated ground The End
15th Jun 2009 10:45 am
Bodsy Site Sponsor
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Surely you won't get that whilst the car is moving....? doesn't it need to have a completely seperate ground point i.e. a stake in the ground instead of you car? Bodsys Brake Bible
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15th Jun 2009 10:49 am
countrywide
Member Since: 16 Sep 2007
Location: UK
Posts: 6019
The only way I could see you doing it is using a isolation transformer, so you can take the ground from anywhere but it has to go through the transformer.
EDIT: That's if you mean isolated in that it can't feedback anything, they are used in Hybrid cars which use high voltages for the drive system. You don't want a leakage through ground if it is a much higher voltage than the rest of the car works on.
Hmmm, I'll read the spec sheets an let you know
OR I might just send you a mail explaining what I'm doing The End
15th Jun 2009 12:04 pm
xtc
Member Since: 27 Mar 2007
Location: Hampshire
Posts: 1072
Sure TFC will come up with a supplier, but for info I have used these when fitting LCD screens in boats. Not only isolates but keeps the voltage constant as well. Limited to about 4-5 amps though so watch the current. No use for your additional 1000w sub!
As CW says though, if it's an audio application you may well just get away with braid breakers in the audio leads and power the unit as normal.Off Roading is OK.... But I'd rather be Boating!
15th Jun 2009 12:07 pm
10forcash
Member Since: 09 Jun 2005
Location: Ubique
Posts: 16534
just thought, if you don't need 'clean' power, a galvanic isolator would do the job! lot cheaper too
15th Jun 2009 12:08 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
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I don't understand any of this!!!
15th Jun 2009 12:12 pm
goodfella
Member Since: 03 Apr 2007
Location: Salford
Posts: 533
This has been like trying understand one of the spanish or italian topics in native tongue.
A galvanic isolator AC/DC clean braided voltage thingymanator. Sorted. Go and get one. Badda bing.......How you doin'?
Java black SE, standard spec. Clean and shiny.
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just thought, if you don't need 'clean' power, a galvanic isolator would do the job! 
