How to use three phase motor in single phase power supply

This time,I would like to share some important knowledge that I used it when faced emergency or critical situation.What are you doing if have only three phase motor and single phase power supply available?

How to use three phase motor in single phase power supply?Actually three phase motor can operate in single phase power supply  with the help of a permanent CAPACITOR.This small thing (capacitor) very helpful to make three phase motor running in single phase power supply.

As per our last discussion about three phase motor,normally it’s have two(2) common winding connection ,STAR or DELTA connection.In this post,I explained how to wiring the capacitor in three phase motor,how to change motor rotation,how to estimate value of capacitance and selection of suitable capacitor.

How to install and wiring capacitor for three phase motor with single phase power supply?

1) Wiring of capacitor for FORWARD rotation

-For FORWARD rotation,we must install capacitor  in DELTA connection as per drawing below.

* symbol –> The change of the connection terminal * of the capacitor allows to invert the turning sense of the motor.

2) Wiring of capacitor for REVERSED rotation

– For REVERSED rotation,we must install capacitor in any two phase of winding in STAR (Y) connection as per drawing below.

* symbol –> The change of the connection terminal * of the capacitor allows to invert the turning sense of the motor.

Output of Motor

We must to consider the output of motor when we converted from three phase to single phase power supply to match and suitable with our application.But we cannot get the actual value due to so many aspects we must calculate and it’s so complicated.So we can estimate the approximate value of motor output as per percentage (%) below :-

How to choose suitable capacitor?

This is very important decision making that we must consider about size of capacitor when plan to running the three phase motor in single phase power supply.If not choose properly,it might be effected to motor condition and performance also can damaged the winding of motor.

Below is approximate value of the capacitor that required.We must consider the Working voltage VS Network voltage to avoid any damage on the three phase motor winding or capacitor it’s self.Please refer table below :-

Comments

1. winter says

what is a vsd and it works to the motors.explain the importants of it to both the motor and the consumer

2. STANLEY says

Please i want to get a schematic wiring diagram which is illustrating how wires are been connected to contactors, and auxilary contactors and timer and push start and stop botton in a 3phase star/delta diagram.
Thanks from stanley

• asif says

i want that same wiring sceme with each and every terminal of contactor ,relay ,timer st/stp push button ,ON/OFF/TRIP LAMPS

• Van says

I would like to see layout schematic.

• mikon power electrics kenya says

You can contact mi by sending yo email so that i can send you the diagram

• Dear sir,

We want to run 3 phase submersible pump set through single phase .please guid me sir
In our phase to phase Voltage R phase to y phase 230V AC , R Phase to B Phase 230V AC and YPhase to B phase 120Volts .So PLeas guid me sir

• Nasir says

Hi marimithu,
I am in the similar situation. Did you find a solution Om how to go with this,
Even we have a 3 phase 230 V submersible motor and supply of single phase 240v.
Any help is much appreciated.
Regards,
Nasir

• Lemau says

Hi Nasir,
You can try to use VFD or inverter to drive your submersible pump.The inverter input power supply is single phase 240V and it will convert to 3 phase output to your motor.But please consider your Inverter current (ampere) rating same rated or higher than motor FLA.Rule of thumb to sizing your inverter is –> FLA x 2 = VFD current rating.
NOTE : Fusing or Circuit Breakers should be sized to match the INVERTER input current rating, NOT the motor current rating!

• venkat says

please send me connection daigram

• nick says

Hi there Im trying to build a rotatory phase converter to run my three phase tyre balancer it has digital display. ive got 240v single phase. with under 1hp motor and a 415v transformer in it. i have a new three phase motor 2hp 415v. I have it running on 240 volts with a cap to start. its wired in star but when i take a reading from each leg ie l1 l2 l3 they only show 192v each. do i need to put it in delta to get the 415v or is this right? hope you can help Nick

• I would be very grateful if you could email me a wiring diagram To operate a 415 volt motor of a single phase 240 volt supply in Australia.Regards Greg

3. nitin says

how can i get variable sources like dc , ac ,varible frequny ac from 440v

4. Kobus says

Can any one help me I got a car lift and it got a three phase motor on and I got only single phase at home .Here is the spec on it. V 230\400. A. 21\12.7. KW. 4. What size cap can

5. rajinder says

i wil disgne a one motor and work 3

6. Gabe Edward says

I have a motor with the following ratings star, 1350w,380v,2850rpm,50hz,2.4A. and delta 1000w,220v,4.2A.pls how and what value of capacitor can I use to covert this water pump to a single phase?

7. K.Suresh says

We are using 1 phase submersible pump now running manually, please send drawing for automatic operation for using timer.

• Denis says

how much is the capacitor 4 starting a single phase motor for7 hp thanks

8. Narendra Anjana says

How to start three phase motor 12 hp in single phase supply please send me a digram or send me video to my whatsaap… my cell number 09950757602
Thank You

9. Reuben says

The control switch for 3phase pump was damaged,can it b possible to run in single direct from distribution box using 20Amp?

10. Annasaheb Nevade says

I have three phase 2.1kw motor want to run in 1 phase missing? what to do voltage is 380 volt. it is possible as using 440v capacitor as per ur above table? reply me my mail ID nsharad1@gmail.com whatsapp no. +919423984609

11. Sachin DB says

How to start three phase motor 3hp in single phase supply please send me a digram or send me video to my whatsaap… my cell number +919901131138

12. ravinder yadav says

How to stat single phase submersible motor with vfd without capacitor

13. sikandar says

Very help full article.
http://www.electricalonline4u.com/

14. Dhirendra kumar says

sir, Haw can inverter connection in house please send me a digram in my email dk9419692@gmail.com

15. rich says

can a one phase motor physically attached to a 3 phase motor (with only phase attached) run up the 3 phase motor to speed and then turn on the switch to the 3 phase motor and keep it running? any power loss to the 3 phase motor? current increase?

16. P.SELVAN says

I need PDF format on Three phase fan to be connected with single phase by adding the capacitor.

• Hey,

If you’re still looking for the answer to your question I recommend asking your question on Quora where there is a great community of active, helpful and highly knowledgeable people who are sure to help you with what you need to know and understand!

17. gabe Edward says

Gabe Edward
I have a 3phase water pump with the following characteristics,for star v=380v, i=2.4A and for delta v=220v, i=4.1A.the power of the pump is p=1.35kw, the speed n=2850r/min at 50Hz. Pls tel me the type or types of capacitors to use and its values to run this pump on a single phase power supply. Pls send to gabe.edward@yahoo.com thanks.

18. Ramon Barotillo says

What types of capacitor can be used to run three phase motor 1.5Kw at 220 volts single phase.

19. ajit n says

is it possible to design single phase and three phase motor using same stator (using single motor) slot by putting both single phase and three phase winding in same stator slots.

20. kiran says

can we use 3 phase motor with out using starter

• Lemau says

Hi,you need the starter to stop and start electric motor…that the one of motor starter purpose.

21. Scott says

please, I have a brand new three phase motor to be installed on a single phase phase network. how do I go about it? also, I don’t know if the motor is already connected in stat or delta or am I the one to do it? I will highly appreciate your opinions. thanks for reading through.

22. William says

Hi sir,can we use this configuration for a larger motor?? Let’s say 30 hp motor??

23. simon says

Hey sir i have 10hp three phase motor, please can you send for me the wiring diagram of connecting this motor on a single phase supply using capacitor and which size of the capacitor should I use, sent to me on whatsapp 0728525990

24. Tulshiram Sarode says

hi sir i have 3hp three phase motor please can you send for me the wiring diagram of connecting this motor on a single phase supply using capacitor and which size of the capacitor should i use,sent to me on whatsapp 7083071434

25. Van says

Can you supply the start and run capacitor specs for a static phase converter to operate a 460v 15kw 3 phase motor?
Thank you,
Van

26. please i need a simple wiring diagram of how to connect a automatic star delta with the control unit using 220v timer and a 24v relay

27. Sangamesh says

Sir, I have 1phase texmo submersible pump. From the starter the connection should be RYB. But motor works only if it is connected in YRB. What is the prob. This is happening only at my home.. not at other power source..

• Rakesh says

No problem…..changes in st coil and rn coil

28. Magic says

Hi I tried this but I got a challenge. The capacitor is continuously burning. What could be the problem? Please help me.

29. Rakesh says

Hi….eny electrical problam call me 9159478044 RAKESH from mannargudi thiruvarur

30. Neeraj says

Hi marimithu,
please tell me in 7.5 hp 3 phase moter we use your upper dia. but not shore value of cap. is 400mfd. or any please clear that . thanking you

31. Mansoor says

i have final year project i have construct
rectifier 220 to 330 V accurately
Hex bridge (1200 v and 35 A rating) with two capacitor Bus 440 V rtin and 1000uF
control circuit contains ir2110 gate driver tlp250 opto couplers and arduino is here to generate spwm pulses
but i am scared how to test this and how measure voltage
would it directly run the 1hp motor or any other methodology
kindly gude me

32. mohamed says

really nice info keep it up

33. Vishal bansode says

I want run 5hp three phases motor on single phase supply what value of capacitor required send by my email

34. Ashok says

can I run 3ph, 0.5hp star connection motor through 1ph input source – 220v

35. Sandip Chandak says

I want run 5hp three phases motor on single phase supply what value of capacitor required but voltage is very low
5hp single phase without neutul is work but capacitor is not supported

36. PREMA says

Sir
I run 25 HP sumbersebal motor in single phase
Help you my whatsup namber 9700570803

37. PREMA says

Sir
I run 25 HP sumbersebal motor in single phase
Help you my whatsup namber 9700570802

38. Joaquim Moto says

I want run a single phase supply to 3 phase motor, so can you help me with the diagram in how to run it from single phase supply, capacitors, contactor then to the motor. My contact: +27783485980

39. fred says

how to reverse a 3 phase motor rumning with a single phase supply with the aid of capacitor wirh delta connection of a motor without converting it into star connection

40. jerwin says

what is the re the value of capacitor. to run the 3 phase induction motor. in single phase power supply, 220Volts,

41. yedi says

for power 2 phase to run motor 3 phase we use inverter/VFD…..

42. WALSE SHANKAR says

I want run 5hp three phases motor on single phase supply what value of capacitor required send by my contact number is 9766261295..

43. Pramod says

1 HP 3 phase motor to 1 phase se convert karnekeliye kiteneka capacitor value Ka lenahi

44. Ahtesham says

I’ve 4 HP 3 phase 3000 RPM pump, it’s winding details is, swg-22+22, turns- 37, Con. Star..
I need winding details for single phase.
My cell No.+91 9766869613

45. Ravindrasinh Chauhan says

How to run 3phese motor on Singal phese supply
With daiyagram m.7778069737

46. I have one doubt related to this:
I want to run 10 hp three-phase induction motor on single phase supply what value of capacitor required? Plz answer

47. Mario rom says

Can i use running capacetor

48. Rocky says

What is the value of capcitor i used for 7.5kw, 380v 14.4amps to make the vacuum motor to connect in 220 v

This site uses Akismet to reduce spam. Learn how your comment data is processed.