3 phase power at home?
Discussion
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Price will depend on individual situations as there's obviously huge installation cost difference between someone next door to a substation/decent supply access than to someone in a rural location on the end of a supply leg that might need upgrading to cope.
For example it cost over £11k to install 3 phase to my fathers builders yard due to needing to run a mile of underground cable from a supply point and installing a pole transformer and that was just to the trasnformer (and this was 20 years ago). It was reduced to virtually nothing due to wayleave for letting them install the pole on his land and they then could provide supply to other local businesses and shore up the local weak domestic supply around his business so was to their advantage.
For example it cost over £11k to install 3 phase to my fathers builders yard due to needing to run a mile of underground cable from a supply point and installing a pole transformer and that was just to the trasnformer (and this was 20 years ago). It was reduced to virtually nothing due to wayleave for letting them install the pole on his land and they then could provide supply to other local businesses and shore up the local weak domestic supply around his business so was to their advantage.
jason61c said:
I've started a thread in the homes section.
If its under £2k, i'll go for it, mainly just to get rid of my noisy rotary phase converter and allow a newer cnc mill to work without worry.
Based on what UK Power Networks say it will cost I'd say it's not likely to be under 2k. Maybe under 3k: https://www.ukpowernetworks.co.uk/electricity/upgr...If its under £2k, i'll go for it, mainly just to get rid of my noisy rotary phase converter and allow a newer cnc mill to work without worry.
My house was owned by the MD of Eastern Electricity in the mid 50s to mid 60s. Why else would a country lane have buried supply cables rather than hanging off a series of poles? Thinking "future proofing" before the term was invented he had a 3 phase supply installed. We still only use one of the phases but I do have the option without installation costs.
Is the standing charge and cost per kwh not much higher too? one of my customers frequently complains he cant get a decent tarrif at home because he needs 3 phase.
Have you looked at solid state variable frequency drives?
I installed one for a customer to have 3 phase ramps at home and the soft start is easy on the elecrical system, never dims the lights like the single phase ramps he had before did.
Have you looked at solid state variable frequency drives?
I installed one for a customer to have 3 phase ramps at home and the soft start is easy on the elecrical system, never dims the lights like the single phase ramps he had before did.
jason61c said:
Vfds are rubbish for proper motors, they can over heat and you can’t add multiple motors. Not to mention on cnc stuff they can’t run low voltage control stuff. Also can’t have multiple things(mill and ramp etc) at once.
Yes single phase input VFDs don't seem to go much bigger than 2.2KVA and don't seem to be required to have power factor corrected input like switched mode power supplies.They work pretty well one per motor though. I have one on a pillar drill, would not be without it. Not as reliable as proper 3 phase. The drill is on its 2nd drive and both this and the previous one have had to be repaired once. It currently trips the house RCD so is on an isolating transformer. As I say jealous of proper 3 phase.
granada203028 said:
Yes single phase input VFDs don't seem to go much bigger than 2.2KVA and don't seem to be required to have power factor corrected input like switched mode power supplies.
They work pretty well one per motor though. I have one on a pillar drill, would not be without it. Not as reliable as proper 3 phase. The drill is on its 2nd drive and both this and the previous one have had to be repaired once. It currently trips the house RCD so is on an isolating transformer. As I say jealous of proper 3 phase.
Motors running on VFD's tend to get a lot hotter also. lets see where it gets to, really hoping under £2k...... No idea where the local substation is and as its all overhead.They work pretty well one per motor though. I have one on a pillar drill, would not be without it. Not as reliable as proper 3 phase. The drill is on its 2nd drive and both this and the previous one have had to be repaired once. It currently trips the house RCD so is on an isolating transformer. As I say jealous of proper 3 phase.
So- mini update. The pole next to my drive has 3 phase, the 10mm cable to the garage can supply enough to run my house. So hopefully if the DNO costs are sensible for the connections, I’ll have a 3 phase supply and meter in the garage and run the house on a single phase using the existing cable to the garage.
Just patiently waiting on the dno costs now.
Just patiently waiting on the dno costs now.
jason61c said:
So costs are in from WPD..........
£1100.24 inc vat.
I've got to add on cable to feed the house from new location, £200 ish.
Sparky for a day £200ish
£200 for bits i've not yet thought about.
so, £1700 all in.
Result.
That's pretty reasonable given the same WPD charged us nearly £1500 to move our single phase meter from indoors to outdoors on the other side of exactly the same bit of wall.£1100.24 inc vat.
I've got to add on cable to feed the house from new location, £200 ish.
Sparky for a day £200ish
£200 for bits i've not yet thought about.
so, £1700 all in.
Result.
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