230 Generator poweringfuseboard & earthing

OP

A

aaelectric

• Oct 27, 2012

• #16

I have looked at this pdf and it doesnt say much, so there is no way this should be used?
also why would it give you the mad readings from being off and powering up, what is vov?
what is the floating earth

 

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OP

K

Knobhead

• Oct 27, 2012

• #17

The earth floats majestically with it's companion the moon around the sun.

 

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Marvo

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• Oct 27, 2012

• #18

A V-O-V generator is no substitute for DNO power.



If you don't understand the consequences of using this type of generator as a domestic power supply, for the love of your family or customers please don't attempt it.

 

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electric will

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• Oct 27, 2012

• #19

So all these people that say put a link between the earth and neutral on the generator?
Looking at that wiring diagram the generator really isn't going to like that!

 

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OP

E

Engineer54

• Oct 27, 2012

• #20

electric will said:

So all these people that say put a link between the earth and neutral on the generator?
Looking at that wiring diagram the generator really isn't going to like that!

Click to expand...

Not on a V-0-V generator it won't!! lol!!!

 

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electric will

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• Oct 27, 2012

• #21

Why are they wired like that anyway? Is it for safety being used on building sites etc? It looks like a center tapped earth transformer but at 240 instead of 110

 

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Marvo

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• Oct 27, 2012

• #22

Yeah, as E54 says, linking the N-E is bad/dangerous advice if the generator is internally configured as shown in the drawing above (V-O-V).

From the link you gave in post #13, can I assume you hired this generator? If you did then your best bet is to take it back and change it for one that's suitable for your application. Hopefully it's as simple as speaking to their tech staff and finding an alternative that's fit for purpose, it's in their interests as well to give you the right genny because the minute you link the N-E on that one they're going to be left with a pile of scrap as well as you'll be missing an eyebrow or two.

 

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Marvo

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• Oct 27, 2012

• #23

They're wired that way because trailing leads or cables are particularly prone to damage, especially if the genny is mobile. If someone gets a shock from the trailing cable to earth then they'll only receive a 120v whack instead of a 240v one. Personally I'm not convinced this is their primary motivation, it's possibly also cheaper to manufacture this way...I'm not sure.

 

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OP

A

aaelectric

• Oct 27, 2012

• #24

Marvo thanks for advice, i think your right about that as when i measured the voltage between ne utral & earth & live & earth it was 110v but with load connected it was no voltage from live to earth bit 240 from neutral to earth.
didnt know there was diffrent systems but u learn something every day.so this kind of generator is reLly only for power tools etc not for feeding a db. Do you know of one that can feed a db

 

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OP

K

Knobhead

• Oct 27, 2012

• #25

Engineer54 said:

Not on a V-0-V generator it won't!! lol!!!

Click to expand...

Come on! At least it won’t be running light.

(No pleasing some people)

 

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electric will

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• Oct 27, 2012

• #26

The more I think about the use of v-0-v generators the more concerned I'm becoming, what about people that use them to run caravans where is no hook up and I know some one that uses one to power a horse box while their away at shows, I'm also aware that there is a rcd in a small cu but then only single pole mcb's etc, surely this isn't safe at all??

 

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Marvo

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• Oct 27, 2012

• #27

If you use them for a mobile caravan or horse box (why on earth do you need power there, there's already 746watts available without a genny ) that has no other incoming supply, they can be perfectly safe if the earthing is correctly installed. The bottom line is they're best just used for portable power with a trailing cable which is what they were designed for.

 

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Marvo

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• Oct 27, 2012

• #28

Is this thread anything to do with you or is it a coincidence?

Thought it was worth highlighting cause there might be some useful info there for you as well.

There's some scary generator threads around this evening :-0

 

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electric will

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• Oct 27, 2012

• #29

No marvo, neither thread is anything to do with me, I was just interested in the generator wiring diagram you posted, that's when I got thinking about the horse box-I fitted a inverter to horse box, well lorry once and they also used a generator because the inverter thrashed the batteries, don't get what you mean about the 746watts already available?

 

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OP

K

Knobhead

• Oct 27, 2012

• #30

Will use this and look up horsepower

 

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