Phase converters ?

sean107

Hey everyone,
was wondering how single phase to three phase converters can work as if you have single phase power it is normally a 12kva connection and most of the machines that need three phase power would be drawing a fairly high current 60-70 amps alone which would blow the 60-80 amp fuse. also can the esb upgrade to the 16kva connection without changing their supply cables and what size is the new esb fuse ?

Thanks for any input

M cebee

sean107 wrote: »

Hey everyone,
was wondering how single phase to three phase converters can work as if you have single phase power it is normally a 12kva connection and most of the machines that need three phase power would be drawing a fairly high current 60-70 amps alone which would blow the 60-80 amp fuse. also can the esb upgrade to the 16kva connection without changing their supply cables and what size is the new esb fuse ?

Thanks for any input

you can go up from 63 to 80amp mcb for 16 kva
youre not concerned with esb fuse
what equipment are you looking to connect
converting for machines isnt normaly great job

sean107

can you go from 63a to 80a without the esb upsizing their cables
the machine is a three phase dishwasher. how could this be connected without melting the single phase connection even if you used a three phase converter

Bruthal

sean107 wrote: »

Hey everyone,
was wondering how single phase to three phase converters can work as if you have single phase power it is normally a 12kva connection and most of the machines that need three phase power would be drawing a fairly high current 60-70 amps alone which would blow the 60-80 amp fuse. also can the esb upgrade to the 16kva connection without changing their supply cables and what size is the new esb fuse ?

Thanks for any input

Well a 3 phase 400v machine taking 70 amps certainly wont be running from a domestic supply. That would be 50+kw`s, which even at absolute parity pf would be 50kva.

Bruthal

sean107 wrote: »

can you go from 63a to 80a without the esb upsizing their cables
the machine is a three phase dishwasher. how could this be connected without melting the single phase connection even if you used a three phase converter

It depends on the kw/amps of the machine. It would be on a rating plate on the machine.

M cebee

sean107 wrote: »

can you go from 63a to 80a without the esb upsizing their cables
the machine is a three phase dishwasher. how could this be connected without melting the single phase connection even if you used a three phase converter

when your supply upgrades from 12 to 16
you can up from 63 to 80
whats amps/wattage dishwasher
it'll be big money for conv plus. a supply upgrade
for 1 appliance

Bruthal

For 400v 3 phase, it will take 30 amps single phase, to supply 10 amps 3 phase, and that`s disregarding efficiency of conversion.

M cebee

there's work needed on the consumers installation obviously in addition to network upgrade if changing from 12 to 16kva supply
I'm mostly familiar with new connections
if you had to do all that plus a converter it would be expensive-prob 3phase supply if available might be better option