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Discuss Don't know why but got to thinking on the way home. in the Electrical Forum area at ElectriciansForums.net

GBDamo

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With the advent of PV feed in, how do DNO guys safely isolate?

Did they ever?

Have they always worked live or do they now have to work under the assumption that everything is live?
 

GBDamo

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  • #3
a red isolator switch .
So if they're working in the street, they knock on everyones door to isolate the PV?
 

GBDamo

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  • #6
If the mains is off the switch on the pv system won't allow it to feed in to the mains.
Yes, obviously but the DNO boys don't have access to all these switches surely?
 

snowhead

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Mentor
The P.V inverter is powered from the DNO mains.
No mains, no power from the panels will get onto the DNO network
They don't need to isolate each P.V, but they always work safe.
 

James

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All grid tied generation equipment should have “island protection” this means if it can’t detect a mains frequency it will not try to feed into it.
 

GBDamo

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  • #9
The P.V inverter is powered from the DNO mains.
No mains, no power from the panels will get onto the DNO network
They don't need to isolate each P.V, but they always work safe.
That makes sense, I'll sleep soundly tonight.

Ta
 
D

Deleted member 26818

They can always spike the cable they’re working on to be sure.
 
S

Squid

You need to have better "thoughts" like the beautiful half naked girlfriend waiting for you at home with a cold beer and errr entertainment......
 

GBDamo

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You need to have better "thoughts" like the beautiful half naked girlfriend waiting for you at home with a cold beer and errr entertainment......
....I just about remember those days, shes still hot mind, just no beer and BJ these days.

Today's welcome home greeting was:-

"the dogs got into next doors garden again, the fence need extending"
 
I check both isolators should two be present
then test with meter/lamp
grounding is a third method if needed
 
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