Comparing 3 phase oven to single phase

We're looking at two different ovens:

One has three phase power and the following electrical specs:
400-415V, 50Hz, 12.5kW, 3P+N+E, 17.4A/hr, 5 wire

And the other is single phase with the following specs:
230-240V, 1P+N+E, 50-60HZ, 4.7kW

Am I right in thinking the three phase oven uses a huge amount of power,
or does the three phase efficiency come into it ?

Thanks !

I think the first oven is a commercial oven and would be pretty big. I think both ovens are quite big. I have a commercial electric pizza oven that is about 90cmm by 90cm and that is about 5kw and its a beast. I would ask an electrician but I would think there is no efficiency play because of 3 phase, it is three phase because it is a 12.5kw draw.

Some domestic ovens have the grill function interlocked with the oven so it is either one but not both together. This arrangement reduces the maximum power draw so it can be sold to customers that only have single phase power available. It is nor necessarily related to efficiency.

The oven with the high power requirement probably has a separate grill without the interlock so every element can be used at once.

The three phase one can use a lot more power, but that doesn't necessarily make it less efficient. Higher power draw can allow it to heat up faster, so you could draw twice the power, but for half as long - costing the same total energy. If it does translate into faster heat up times, then it could actually be a bit more efficient, as the shorter time means less heat lost overall.

If you have solar photovoltaics, and the sun is out, the lower power oven could draw a higher proportion of its power from the solar panels.

What brand of oven is the 1st one? 3 phase is mainly used for resturants or take away shops. The elements heat up quick because they will be over 1000w and use a deal of power to do so.


When i got no time to sit at the computer. I use tapatalk.

Both are commercial ovens, made by Turbofan. Neither have a grill function.