I have had the misfortune to buy a Lincat Combination Oven for my Hotel.
These normally come in 10kw three phase. 3 x 13amps That's not too bad.
I have the single phase version 1 x 39 amps. Not so good.
It is operating at 1 second on 39 amps
0.2 second off 0 amps
Cycling continually. for hours.
I have a 40kva single phase supply and can hear the current hammering away incessantly. Lights flickering etc. I asked the manufacture for details of soft starting and duty cycle. They say this is the way they were designed to work. Bang on and Bang off --1 second cycle continually.
I don't have a current (Hee Hee) Reg book. So I ask is there a reg in place that covers the single phase load criteria.
To add insult to injury-- I have a three phase 65kva standby set.-- I would not put that destructive abuse on one of my 20kva phases, it would shake it apart. So I cannot run it.
Regards -- Tony