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qarba0
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Join Date: Dec 2011
Posts: 8

Connecting Power Supply (Earthed System) to Unearthed Consumer

12/02/2013 5:33 AM

What will be the impact of connecting power supply that is earthed to an installation that is not earthed? The unearthed installation uses a meter to detect leakage. This is a tug boat which uses its own power supply (a generator) when it is offshore- the generator neutral is not earthed. When it is onshore - we need to connect our power supply which is grounded. The idea is to provide only a three phase and a neutral - 4 wire to the boat without the earth wire.

Anybody who can help us before we connect our power supply as explained above?

Thank you in advance.
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PWSlack
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#1

Re: Connecting power supply (earthed system) to unearthed consumer.

12/02/2013 5:46 AM

There are regulations for this sort of thing. British Standard 7671 is one of them.

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PWSlack
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#2

Re: Connecting power supply (earthed system) to unearthed consumer.

12/02/2013 6:02 AM

A qualified local Electrician can certainly help.

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qarba0
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#3

Re: Connecting power supply (earthed system) to unearthed consumer.

12/02/2013 6:14 AM

My question is that - will this connection cause such things as circulation of current etc.
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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#4
In reply to #3

Re: Connecting power supply (earthed system) to unearthed consumer.

12/02/2013 6:34 AM

Not if it is carried out in accordance with local Regulations. That is why a local qualified Electrician can help as that individual will be up-to-speed with local Regulations.

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lyn
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#5
In reply to #3

Re: Connecting power supply (earthed system) to unearthed consumer.

12/02/2013 8:26 AM

No.
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IdeaSmith
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#6

Re: Connecting Power Supply (Earthed System) to Unearthed Consumer

12/02/2013 9:21 AM

Try this!

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IdeaSmith
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#7

Re: Connecting Power Supply (Earthed System) to Unearthed Consumer

12/02/2013 9:44 AM

There is an interesting aspect of your problem:

http://www.farwestcorrosion.com/fw/fwst/marine/marine_galvanic_corrosion_overview.htm

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qarba0
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Join Date: Dec 2011
Posts: 8
#8
In reply to #7

Re: Connecting Power Supply (Earthed System) to Unearthed Consumer

12/03/2013 5:48 AM

Gents thank you very much, indeed, for your valuable advices in resolving my problem.
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