Reading this thread there must be some sort of electrical condition report produced which gives the value of Ze, the external loop impedance, and the type of earthing arrangements. Being 200M from the transformer, and with a 200A fuse, there is a chance that Ze is rather low. Given this figure, the size of cable from distribution board to the combi could be increased, possibly rather dramatically and expensively, to mitigate any voltage drop. Can you check any documents you have?

Just my tuppence worth.

Reading this thread there must be some sort of electrical condition report produced which gives the value of Ze, the external loop impedance, and the type of earthing arrangements. Being 200M from the transformer, and with a 200A fuse, there is a chance that Ze is rather low. Given this figure, the size of cable from distribution board to the combi could be increased, possibly rather dramatically and expensively, to mitigate any voltage drop. Can you check any documents you have?

Just my tuppence worth.

The street main might be 300mm2, but is likely to be less, but probably no less than half that, - so 200m of that  will be something like 10 to 20 milliohms per core. So if there is a 40A load step you would be looking at a volt or so of line jump, just from the street cables. On top of that a 1MVA transformer may drop 3 to 5% at full load - say 12V drop  for a 800 A step per phase - so at 40A, another half volt or so. However, the substation may be smaller, so proportionally more voltage droop per amp than a larger one.

However I agree, if the installation is anything like well designed, most of the voltage drop will be on the consumer side of the incoming fuses. The point is however that the product is utterly unsuited to almost any installation in the UK - the rate of switching should be once every few minutes , not several times a minute, just  to meet the standards needed for causing unacceptable flicker. I presume the makers are  silent on this aspect.
Mike.

In the Catering equipment business.     --They Have No Standards As We Know It Jim--------(Kirk)

They ask for a 50 amp breaker and that's about it.-- And in she goes.

Yes Mike --I e mailed the design Engineer in Denmark and he replied    "Thats how they work"   I think the problem is that 99% of these ovens work on three phase. 3 x 14 amp is okay for inrush but   --   50 times a min oscillation is beyond my ken.

I will not connect that loads to my genset. The R.S.P.C, G.Set. would get me,