Yes, but the 'same question' which westie could have asked about this is why electricians are being asked to waste their time recording a figure which is going to be same for all grid-supplied installations throughout Europe!There is only one symbol/abbreviation 'Nominal frequency f'.BTW, the next 'question' on the form is "Nominal Frequency", so you could ask exactly the same question about that if you wanted to
I think you are scraping the barrel far too vigorously in an attempt to defend them! Change of the European electricity frequency (after a century or whatever of 50 Hz, albeit initially 50 cycles/sec) would be such a gigantic happening (and probably 'unthinkable', in view of all the frequency-dependent things out there!) that I think everyone would have the date of the change imprinted in their minds, and so could deduce the frequency 'at the date of the cert' from its date.
I suspect though that the really interesting discussion would stem from the original question. Clearly the problem which can occur is that the PV inverter, if the cable to the point of incoming mains drops significant voltage, and if the incoming voltage was too high to start with, can cause the inverter (for legal regulation reasons) to switch off. The installer is really responsible in this case to spot the possibility in advance and not end up with a dispute with his customer.Yes, that could well be the case with a PV installation. I have to say that I did not interpret the OP that specifically. When westie wrote:
...I thought that his word 'say' implied that he had just pulled 'solar panels' out of the air as an example (and could just as well have written 'shower' or 'cooker'). However, now you mention it, the question probably does make more sense (and, as you say, would be more interesting) if it was actually specific to a PV circuit.
Yes, it sounds as if they probably are (assuming the excessive supply voltage is consisient/persistent). Although it's a but naughty, I suppose they might be assuming that DNOs take steps to ensure that they always provide supplies of a voltage which is acceptable in terms of regulations/laws
Agreed. I don't think I was defending them. As you imply, two wrongs don't make a right!
c. 110.1.2 (i)
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