Star / Delta 220 / 440

[@TheInfoworks]

Just as an addition for your viewers information I have covered the selection of capacitor size in my series of videos on this subject. "How to do it, run a 3 phase motor on single phase supply". It is important to use an AC capacitor of the right voltage and capacitance. A higher voltage is not a problem, but lower is. A DC cap will go pop when connected to AC. Always enjoy your videos, and the quality of some of your close-ups when machining is tremendous, Cheers, Andy.

[@doubleboost]

Andy Reynolds Thanks Andy

[@Esiggies]

+Andy Reynolds If I may ask. I have a 3 Phase induction Motor 3HP 2.2 KW with 240 in and 3 phase out , which at present is setup with a variable frequency drive. I would like to run just on 240V as I need the variable frequency drive for another machine. First is this possible, what are my losses? and what size cap would I need. Regards Peter

[@TheInfoworks]

Peter I suggest you watch my 6 part series as this will answer most of your questions. With that size motor you will need a start cap as well as a run cap. The run cap should be about 50 Uf, but you will have to check the voltages whilst the motor is running. Cheers, Andy

[@Esiggies]

Thanks for your reply will follow up on videos and scratch my head a little less. Cheers

[@telosfd]

+Peter Linch 3Hp motor is to big to run up in one phase.

[@clivebucknall1362]

Hi John i did the same with my coolant pump, and did a bit of research and found that 70uf per horsepower is about as near as it gets, thanks for the videos and keep them coming, all the best to you and your wife, regards clive

[@scheppach69]

A very informative video about the wiring of dual voltage motors which is usually a black hole to us mechanically minded. Thank you it has helped me, and I guess so many others in how it should be done.

[@AstraWerke]

The rule for capacitors usually is 70µF per Kilowatt of output. If the value is too low, the motor won't start properly, if it is too high, there will be extensive heat buildup which is why some motors have a starting capacitor that is only activated for start-up and then disconnected. The running capacitor has a lower value and ensures the motor stays cool during run.

[@doubleboost]

Adrian Straub Thanks for that

[@MsSomeonenew]

Concise, on topic and with functional example, that is how instructional videos need to be made. I went through 10 other videos before this that made everything completely and utterly unclear.

[@thebeekeepersworkshop]

Me too they write the title in English they jabber on in another language

[@jonerasmus9399]

Great vid thank you sir , my hat is off to you . If only my tech school taught me this ....

[@binks166]

John, very useful information. I had no idea it was possible without using a 3 phase converter. Thank you, Harvey from Nebraska

[@one4stevo]

Nice job explaining how to to rewire the motor. i remember when i put a vfd and had to rewire the motor to delta. i had no idea so i got a mate to do it.. looks simple after seeing this great job. hope debs doing well :)

[@doubleboost]

one4stevo Debs is good

[@TEREZKATERKA100]

Zrozumiteľne jednoducho vysvetlené. Vďaka.

[@MIGHTYcbu]

Thank you, great information . I was wondering how these type of motors should be connected, but now I know. because the windings are straight across from eachother, U1 opposite of U2 etc, it made no sense to me. I expected the windings to be like in a 400/690 motor, U1 opposite W2 etc

[@tsheritageengineering]

Did that with the pump on my harrison last week. Used a 4uf motor start capacitor, £2.50 on eBay. Runs well. Did it on my Boxford years ago and it has never given bother.

[@stefantrethan]

Tony Simons It should be a run capacitor, not a start capacitor. Start capacitors are only rated for a few seconds service (in motors with centrifugal switch) and will overheat if used as run capacitors.

[@tsheritageengineering]

must have been a run one as its been fine for 10 years or so

[@MdSaleem-ob2ue]

Tony Simons q

[@DSIreland]

I got a lathe and i think i can do this what capacitor do I need

[@leoawitan3183]

excellent tutorial,so much appreciated,about the delta,to star wye contact lines for 3phase,trans...

[@MaturePatriot]

Here in the states we are always trying to run 220vac 3ph from 220vac 1ph. I built my own 5hp RPC and have the voltages pretty well balanced on each phase, and kept the amp draw at a low level. I will only be able to run one of my machines at a time, but then there is only one of me.

[@billmoran3812]

This will work on a small, lightly loaded motor. However, you will lose torque, because the windings are in balanced. The capacitor does give it sufficient torque to start, but because it does not shift voltage by a full 120 degrees phase angle, that is why the voltages are unbalanced. This will create additional heating in the motor. If this were a heavily loaded motor, it would overheat and eventually burn out. I'm an electrical engineer, for the past 40 years, this is what I do for a living. There are small variable frequency drives that will allow a small motor to run on 3-phase power from a single phase source.

[@billmoran3812]

+Lorena Dervishi , no amount of Capacitance alone will create a third phase at 120 degrees. 90 degrees of angle is sufficient to allow starting of a rotating motor, but the current flow to the windings will remain unbalanced, causing heating of the motor. Keeping the capacitance in the circuit will result in a very significant leading power factor that will cause further heating of the windings. The only way to create true 3-phase power from a single phase source is either a motor driven synchronous generator, or an inverter. Multiple 3-phase motors running off a rotating phase converter will improve the balance between phases, but not entirely eliminate it.

[@vernonjones3613]

B

[@duncanwalker7380]

Good sir I needed to ask, I have a 380v 3.0kw motor that I need to convert to single, what would be the size of capacitor ratings without Burning thing's out. Plus I have a theory. To create 3 phase power can take a single phase wire and connect via looping from one MCB to another whereby creating 3 outputs Of Power from one line which now gives me 3 phase power . Or am I wrong

[@somadinafanz6568]

Good day engineer, please I want to know which of these three phase will have best efficiency, STAR/440 OR DELTA/220?

[@markodonovan9921]

Mr Moran, if I were to use a small three phase motor designed for 380v in delta configuration with a vfd that outputs 3 phase 220volt, do you think I'd have any issues. The motor is for a pool pump only .75hp.

[@Orgakoyd]

The relationship between Delta and Star (Wye) is 1.73 (square root of 3). So 220/380, 230/400, 240/415 or 277/480.

[@RickRose]

So the way I interpret what you've done is, you've built a DIY static phase converter. I am, as always, impressed. Cheers to Debs!

[@misaelharry6613]

i guess im asking the wrong place but does any of you know of a tool to get back into an Instagram account..? I stupidly forgot my login password. I would appreciate any help you can give me.

[@hayeselisha2237]

@Misael Harry Instablaster :)

[@misaelharry6613]

@Hayes Elisha i really appreciate your reply. I got to the site through google and Im in the hacking process now. Takes a while so I will get back to you later with my results.

[@misaelharry6613]

@Hayes Elisha it did the trick and I finally got access to my account again. Im so happy! Thank you so much, you really help me out!

[@hayeselisha2237]

@Misael Harry happy to help :D

[@SeanBZA]

An alternative for the small motors is to get a motor in the same frame size made by the same manufacturer that is the single phase variant and swap the stator sections. The rotor will typically be the same size and then it will be single phase. The leftovers you can put back together and have a 3 phase motor, which somebody else can use again. Works on those motors with special end bells or specially modified shafting, and can work quite well. At least with this conversion it will run cooler.

[@TheInfoworks]

yes, but you have to source another identical motor, this way is low cost, no real hassle, and you can use caps from old flourescent light fittings. Cheers

[@FredMiller]

I enjoyed this with my Sunday morning coffee! Thanks for sharing! Fred

[@doubleboost]

Fred Miller Thanks Fred

[@andrewmicas4327]

John if you look at the original links I bet there are will be two stuck together and appear a just one. Swopped plenty over as we used single phase inverter to save cost (they give out 220/240v 3phase) on industrial Carpet Backing plants.

[@doubleboost]

ANDREW MICAS There was only 2 like you say normally there is 3

[@zeetadentertainment9392]

thanks its so simple and help full

[@lordzsimban5074]

very nice video sir, simple and clear thank you for sharing your idea...

[@ytube835]

Amazing Thank you very much "Shikuren '

[@zlatkomozetic2822]

Excellent video. But what size capacitor do we use on which motor power? Is there any formula for that or do we orientate only to the supply voltage? Any help would be appreciated.

[@amino-acid4919]

I love this video.... Simple and nice.... Weldon bro

[@charlesbeck6034]

Thank u sir I bin trying for 4days to wire a 3 face motor

[@mdnasimnajar6347]

very nice video Sar star delta canecan

[@umarqazi0]

Good information nice to meet you

[@narendergodara1992]

perfect knowledge 👌👌👌👌👌👌

[@omar-qe6dy]

Gut gemacht, vielen dank.

[@davisonnyatinyirenda4626]

Very good work. How are you doing sir.

[@adonismallare9816]

Thank you so much sir for your very informative video...

[@SeanBZA]

There is an earth screw in that frame, partly hidden under the terminal block, the earth must go to that from the power cord. You can do additional earths, but the cord earth must go direct to the frame. That way if the motor shorts to earth and you pick it up you will still have the motor earthed, and will not get a shock.

[@doubleboost]

SeanBZA Thanks for thatIt was not earthed on the lathe

[@SeanBZA]

Now try to fit that spaghetti inside the cover and close it, plus use a second cable gland for the capacitor. You should get a motor run cap with integrated lead, so that you have no exposed terminals outside. That way you just use a large P clip or a cable tie to hold it to the motor side.

[@doubleboost]

SeanBZA Now that I have it running I will get a new "run cap"No exposed terminalsI ran a similar set up on my Boxford for 10 yearsThanks again for the heads up on the earth tag RegardsJohn

[@supermazingerz72]

+doubleboost awesome video, can I do this with a 5hp 3PH for a table saw? Thanks in advance

[@elidonner167]

Thank you 👍

[@naturallivingentitywithin451]

I am thinking of doing this to a 3/4 hp motor on a tool & cutter grinder. A capacitor is far cheaper than a converter or inverter.😕hmmm..... As it is under 1hp, will the motor still overheat? I also need the machine to be able to switch into reverse as well. Will the machine still switch into reverse via the forward and reverse switch with the capacitor fitted to the motor or would I be better of just investing in an inverter?....

[@stuarthearn9890]

ah looks like motor on my cazenueve lathe, now, I just scored two hydraulic power packs 2.2 kw wired in delta 220, I swing them to star, so i generate my 3phase from a Lincoln vantage 400 gives 17kw 440 V the controls are 24volt dc, came from a ship,so i will need swap solenoids to 230ac can you advise how powerful a 3ph motor will run as you've done hear on a cap start, you taught me something today , THANKS

[@romulopartoza5598]

What is the purpose of yellow green wire in the middle? Where it is connected?..........

[@doubleboost]

That is the earth or ground wire

[@bigun447]

I somehow expected Mr. Bozo to go ZAP-POP-FIZZLE At least you have 3 phase. It would cost thousands to have it ran to here. So we are stuck with converters or VFD units. The nearest 3 phase is well over a mile away. Good video.

[@jusb1066]

Big'un44 He doesnt, he uses a converter too, and thats wjhy he converted this to 240v to save always having to run his converter, passes Big'un44 some coffee to keep him awake for the video! :}

[@debihedderwick1160]

Thanks for this! Im doing the exact same project! capacitor is on order!

[@evrenforest2578]

Lovely explanation. Thanks

[@γιαννηςκαρ-σ9τ]

please tell us about the perfect capacitor in any case thankyou yiannis

[@peternewby2109]

Hi John Just a bit of information I do not know if you are aware but there is a model engineer exhibition at Harrogate show ground this weekend Friday to Sunday. There are lots of lathes mills plus accessories plus of course lots of engineering models. For more information click onto National Model Engineering Exhibition Harrogate 2015. Regards Peter Tyneside Model Engineers

[@doubleboost]

Peter Newby Thanks for that PeterI will be there on Saturday

[@peternewby2109]

Morning John Make yourself know I am on the Tyneside Model Engineers stand you have a few fans there. Regards Peter

[@keongjawi1059]

Good .....information Thank.s ....

[@1989beasley]

If I had a 3 phase water pump could I wire it up to single phase and have it running constantly to run a pond?

[@geralda2676]

how to check a compatible cafacitor in the mottor to changes a single phahe?

[@theholyquran755]

how to get the capacitance. Thank you for this informative video

[@davidtams1218]

What size capacitor did you use and did it stand the rest. Of time?

[@doubleboost]

I will need to have a look It is still running fine

[@davidtams1218]

Great thank you.

[@davidtams1218]

Did you get chance to look at that capacitor. I’m wanting to run my Boxford coolant pump on single phase.

[@globe1office843]

How to retapping 220v/440v deltawye to 400v/690v delta wye soft start?? Tanx in advance

[@edgehead13]

Hey, Is there a reason why you connected the Capacitor to the middle and right slot? does it matter where it's connected to? Can i connect one side of my capacitor to the left ring and the other side to the right ring and leave the center ring without a capacitor lead?

[@samirlamichhane9379]

Can't we use 240 volt for every single pole as delta connection or this motor isn't use for delta 240 volt to all pole ?

[@sameldimalao3454]

very nice demonstration i got it buddy.....thankssss

[@mohapistevansmatlokotsi1119]

Questions :what's the size of the capacitor

[@peterprobst316]

Best Video! Super.

[@progressfriday1449]

How do determine the size of the capacitor a motor

[@imysteryman]

John Thanks for sharing John F

[@jameswaymyers6359]

i like the simplicity of this video more people should instruct the same way. I am curious to know, the motor is running no doubt but what is the FLA before a load is placed on it. seems neat but not practical

[@doubleboost]

+James Waymyers It is ok for this application just a coolant pump I have used them this way for years

[@mohdfirdaus3055]

+doubleboost help me how to convert my 3 phase motor to single phase.. this is my machine table saw wadkin bursgreen 10" help me

[@mohdfirdaus3055]

+doubleboost help me how to convert my 3 phase motor to single phase.. this is my machine table saw wadkin bursgreen 10" help me

[@kamaleshyadav3708]

Nice video keep it up.

[@SuperChromatic]

Hi, Tried your method on a Lowara star /delta motor. I triple checked the wiring, started it and hummed, smoked and the shaft hardly revolved. Any ideas on what l may have done wrong? I used a 20uF capacitor. Cheers.

[@mukuku]

What is the size of the capacitor here?

[@edwinrohweller]

Great video! You should probably say something about discharging the capacitor at 6:23, before playing with the leads. Otherwise, very informative.

[@ДанаилАшков]

What permanent capacitor should i get for 3kw motor

[@brendan454]

Hey john, im wanting to run coolant on my lathe. Ivw got the setup but ive always herd if your not going to use it everyday it will go "off" and start to smell. Unless theres better coolants now days?

[@samiromarchege804]

nice illustration but ca you explain how connect a 3 phase synchronous motor from the power supply using a contactor and thermal overload

[@wasimedoo7994]

One more how do you know the size of capicator

[@greasemonkeygaragewatson1069]

Hi John, did the single phase supply come from a 13anp 3pin plug ?

[@doubleboost]

greasemonkeygarage watson It did 13 amp 3 pin

[@parowdan]

excellent video ....i always wanted to know why they had a capacitor on there thank you so much....

[@trainhardsweat1571]

So is 230v work both ways with the links

[@sholehkah5598]

Good morning sir. Sir i wont ask to you. I have motor 440v 3phase, then i give position start, and i have power supplay 440v whay may motor fire.?

[@danallured5806]

Hi there john, I've been an avid watcher of your vids since I first bought a little 100 year old relmac lathe 18 months ago or so, I have learnt so much and really enjoying my hobby. This vid has made me need to get in touch! I have a 3 phase motor I was selling on ebay to get a single phase to run my other small hobby lathe,but after watching this I have found mine can be converted too,just one question, you say that by swapping the connections over will reverse the direction of the motor..... is there anything available that can be wired in,such as a switch that could reverse the motor when needed( threading small threads,for instance) and how would it be wired in? thanks for taking the time to make these vids, you have no idea how valuable they are to a 44 year old novice such as me! congrats on the channel and love to debs,my wife and I are still including her in our prayers( I give lynn an update everytime you give us an update!) best wishes. Dan,leicester UK

[@gregcacace8313]

Can you tell me if this reconfiguration will also work with other equipment? How about 3 phase commercial ovens to 1 phase 240v?

[@abelgonzalez5409]

Can I ask you 'What material do you use for the metal stripes that bridge the terminals?' I can't find the info anywhere:(

[@arsenalh8manu]

brass shim

[@Tsagami]

What is the suitable capacitor μF? Depends how many HP is the motor?

[@p.d.shajudevassy6806]

Please let me know ,if a star delta six wire connection u1 u2,v1v2 , w1w2, mixed in the terminal box ,how do we find out v1u1w1 and v2u2w2 ? Could you please explain?

[@γιαννηςκαρ-σ9τ]

perfect !!! thank you yiannis

[@Stubytube]

Hi john,emulate you it with the capacitor another fase, no you lost a few power it's type conexion. I sorry my english is bad. congratulation good video

[@TheInfoworks]

The motor is running on 2 phases, so it produces 60% of the rated power, cheers

[@hemaprasanth7326]

What are the disadvantage in this method?

[@doubleboost]

You will not get full power & the motor can run warm , ok for a small pump motor like this

[@edgar8799]

nice work..

[@jameskinuthia7605]

what is the value of the capacitor

[@WAVETUBE84]

the motor will run cooler and more efficiently on the 440 "star" configuration. But, it won't make a difference in your lifetime. Just saying.

[@ronnor58h]

good video, thank you, great job

[@AmirAli-zd2fw]

Can I also run 415 volt 3phase Italian motor the same way

[@IbrahimKhan-st3yp]

It really helps me with my comprrssor the other thing i need to know can i change the speed of the motor with same delta connection my motor runs a little slow

[@rgbargeee]

so thats how you do it , thank you for that. What size cap did you use in the end for that little motor?

[@TheInfoworks]

Start of from a basic idea of 30 Uf per Hp and then experiment. The motor should run quietly and all the voltages should be the same. A high voltage suggests a cap value too high, Cheers

[@somaraju8631]

+Andy Reynolds I have 5 HP 3 Phase motor. Do you suggest me to use 5X 30 = 150 mfd. of 440 V or 240V? Please reply. Thanks

[@TheInfoworks]

Hi. The start current for a 5 hp motor will be quite large, about 10 times run current. I would try to run this motor on 240v with 150 Uf caps. Remember you only get 2/3 of the power and you may need a start capacitor. You will need to view my videos on this to wire in an addition capacitor to give a start kick. Cheers

[@somaraju8631]

Thanks for your reply Dear Andy

[@306zubair]

what is the value of capacitor and voltage rating?

[@gazdkw82]

Isnt that 2 phases (1 230v and another from the capacitor) and then a neutral? How do you figure it is 3 phase?

[@ricktv3514]

Greetings, is that a start compacitor or a run compacitor ?

[@TheJask101]

Great great video! Could you make a video on star delta theory ?

[@t0nito]

It's actually 220V/380V or 230V/400V (230 x square root of 3 = 400)

[@liammccarron8191]

What's the farad rating of the cap?

[@bashirmohamed7982]

you can only do this on smaller three phase moters?

[@telosfd]

+brad alhadri All motors less 2HP!

[@robertreznik9330]

+brad alhadri I had a 10 hp 480v well motor that ran for years on single phase.

[@bashirmohamed7982]

Yes, you can configure single phase with capacitor to run three phase..

[@ameenghuloom1346]

good day how to find the right capacitor for any motor. i have air comprasor and its working on 3 phase and i need it to work on single phase. how to find the right capacitor size thanks for you

[@fazzalbhai6425]

how to make winding of 3ph motor to single pH without using themostat switch.

[@phooesnax]

Nice job.

[@stevenkuman2145]

If three( 3)phase motor changed to single phase will run without a capacitor ?

[@AK-yf4dp]

that`s impossible ,because the single phase motor isn't self starting , it needs capacitor for starting ,that`s make it running very well.

[@alex993cc1]

run cap for the win. also did you measure the difference in current drawn? being a coolant pump its not going to be extremely "thirsty" tho ;-)

[@coswepanggayan4841]

It's clear illustration

[@ukwelder7906]

Hay can any one help me my motor seems to be running very hot as in can’t touch it hot it is a ecos the plate on the side says it can run single or 3 phase if any can help as don’t want to blow it befor I have even used it

[@maksimyahia5227]

Will this method work for all 3 phase motors ?

[@nho7125]

do we need running capacitor ? is that you used was start capacitor?

[@doubleboost]

the cap is a run cap it generates the third phase

[@kobudoka1165]

I´m sorry, but in delta config it´s signed as 400 V only (really it is 380 V)

[@a_balanced_perspective]

how I correct capacitor choose relative any motor power?