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Unexpected high current on 3 ph induction hob.

hertzal123
Have to run a supply for a 3ph 14kw induction hob.Without considering power factor,

I calculated 14000/3 divided by 230v to give 20.28A/phase.Looking at the data sheet

the rated current is 38.9A/phase,indicating a pf of 0.52.Is this normal for this type of kit?

Thanks for any advice,

                              Regards,Hz
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    Be careful with american mains supplies. you might have 240v delta (with a centre tap on one winding earthed) giving you 120,120 and 208 to earth, and 240 between any two phases, or a corner grounded delta with 240 to earth on each of the two 'lives' but 240 also between the lives.... or a split single phase 120/240v appliance that happens to have 3 wires...it's a bl**dy minefield. (but I did learn to check a few assumptions at the desk, when I worked over there.


    Finding 277/480v 3 phase Y service** to a building, with single phase ( but connected phase to phase)  transformers providing a 'normal for the US' 240 v  split phase (120-0-120) for normal outlets, isn't at all uncommon.


    Their system taught me a lot, and despite the complexity (probably why they require electricians to be licensed journeymen)... has some advantages. But.. in your case, email the manufacturer to triple check. Also check that the Induction hob will handle 50Hz ok (if that's your intended application)


    Up North in Canada, apparently it's 347/600 volts, which would be even more hair raising!

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  • 0
    Be careful with american mains supplies. you might have 240v delta (with a centre tap on one winding earthed) giving you 120,120 and 208 to earth, and 240 between any two phases, or a corner grounded delta with 240 to earth on each of the two 'lives' but 240 also between the lives.... or a split single phase 120/240v appliance that happens to have 3 wires...it's a bl**dy minefield. (but I did learn to check a few assumptions at the desk, when I worked over there.


    Finding 277/480v 3 phase Y service** to a building, with single phase ( but connected phase to phase)  transformers providing a 'normal for the US' 240 v  split phase (120-0-120) for normal outlets, isn't at all uncommon.


    Their system taught me a lot, and despite the complexity (probably why they require electricians to be licensed journeymen)... has some advantages. But.. in your case, email the manufacturer to triple check. Also check that the Induction hob will handle 50Hz ok (if that's your intended application)


    Up North in Canada, apparently it's 347/600 volts, which would be even more hair raising!

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