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Induction Motor Wiring? Answered

Hi,

I've recently bought a Clarke Induction Motor with these specs:

230V
1 Phase
2 h.p.
1.5 kW
1330 rpm
50 Hz
9.4 Amps

Capacitor Details:

50 micro Farads
450 V



I have been looking all over the internet on how to wire it up to go into 240V mains (UK) but I can't find a thing. In the terminal box there are 6 terminals labled V1, V2, U1, U2, W1, W2.

A brown wire connected to U2 and a blue wire connected to W2 lead off to the capacitor.  A red wire connected to V2 and a white wire also connected to W2 leads off into the motor. Another red wire connected to V1 and another white wire connected to W1 also lead off into the motor. Nothing is yet connected to U1.

Please see the pictures which make this a lot clearer.
(I have removed the capacitor from the blue catch for the photos)

I have looked all over the internet and there seems to be no mention of anything. I basicly need to plug this into mains (therefore 3 wires, live, neutral and earth - obviously earth goes to the motor casing) So which wires go where? Also, the website of the shop that I bought it off said that a 10-16 Amp starter is required. What does this mean/do? Can you just plug it into the mains without this starter.

It is probably obvious that I am somewhat of a rookie in motors!

Thanks very much in advance for any help!

Discussions

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0
OolongJ
OolongJ

4 years ago

You can make a crude rotary phase converter using capacitors sized for the motor aswell. Gets expensive over a couple hp

0
OolongJ
OolongJ

4 years ago

Sorry. I meant Delta not Y

Type in 3 ph Y Delta wiring and look at the images.

0
OolongJ
OolongJ

4 years ago

6 terminals.

Its a 3 phase motor right?

Wire it in wye configuration and use a variable frequency drive or a rotary phase converter

0
HelenP38
HelenP38

4 years ago

Hello - we have the same motor and have no idea how to wire this up - have searched around the net but nothing, did you find out how to wire this up? Any help will be very much appreciated as we are stuck.

0
Dom-G
Dom-G

Answer 4 years ago

Hi the Live and Neutral connections should go to the two posts with Brass straps one to each either way round is fine as is an AC motor with start winding and centrifugal switch. The Terminals on the motor are Labelled for three phase motor wiring in Star or Delta so not really appropriate to single phase application. Just wired one of these motors up so I had to check my theory.

0
iceng
iceng

Answer 4 years ago

Here is the standard motor hookup.

As the motor starts to spin up to speed the cut-out switch disconnects the 50 uF AC capacitor from the start coil winding for the duration and the motor only runs on the coil winding 1-2....

The second pic shows a cut-out switch and the AC capacitor.

Still looking, got to go now.

Cstart.bmpACswMotor.jpg
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HelenP38
HelenP38

Answer 4 years ago

Thank you for that, it's the wiring up to the plug we don't understand, live and neutal, where do they go ?

0
iceng
iceng

Answer 4 years ago

A dual voltage motor has two windings that are in parallel for low voltage and series for high voltage...

Sorry, I'm not familiar with the UK symbol designations.

BTW be sure to click each pic to see the entire image !

1p220V.JPG1p440V.JPG1pDUAL_V.gif
0
iceng
iceng

Answer 4 years ago

Also notice (1) & (4) is always tied to the main.

A different capacitance is used for the starting coil if it is a large motor.

Background FYI the starting winding and capacitor is used to provide a phase shift to begin a rotating EMF that starts to pull a rotor up to speed.. The start winding is usually low resistance, high current and would usually burn up if left on too long...

0
iceng
iceng

8 years ago

Since it didn't come with a wiring diagram ( sloppy shipping clerk )
I would temporarily lift the jumpers and capacitor wiring and Ohm test
the windings to try and make sense of the wiring.

Those jumpers are usually designed to wire coils in parallel or series for two different supply voltages.

Often the jumpers go horizontal for one voltage and vertical for the other voltage.

Usually they ship, setup for the higher voltage to avoid smoke at first
startup.

The stater is a box that limits inrush current and usually puts some
current limiting devices in series with the motor either manual or automatic one to five steps.

The motor running current is 9 amps, that means it could do momentary 90 amps with a mains unrestricted start.

A

0
Zouaoua
Zouaoua

Answer 8 years ago

Ok thanks very much I'll have a look into the testing tomorrow.

Would it be possible to run the motor without a starter for testing/ brief use while I search for one? (Also, I have a spare switch: would this be adequate (obviously it is not a starter but just as a switch for the motor?) - similar to this one http://www.axminster.co.uk/axminster-axminster-kjd17-switch-prod824645/)

0
iceng
iceng

Answer 8 years ago

You might have to reset some circuit breakers and get a new switch.

0
Zouaoua
Zouaoua

Answer 8 years ago

Are you saying that you definately need a starter and that the switch is not adequate?

0
iceng
iceng

Answer 8 years ago

All that can happen is popping a circuit breaker.
And a low cost switch might weld shut on the second try.

Nothing that inscrutable members are deterred by :-)

Who knows maybe you will find a  no-load start will work seven out of
eight times without tripping a circuit breaker.

A

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steveastrouk
steveastrouk

Answer 8 years ago

Machine Mart sell starters too.

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iceng
iceng

Answer 8 years ago

Good idea since the motor manufacturer's web said you needed
to use a starter.

0
Zouaoua
Zouaoua

Answer 8 years ago

However would it work just directly connecting it to mains (eg house circuit breaker may trip)?

I will buy a starter soon but I am not able to at the moment...

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Zouaoua
Zouaoua

Answer 8 years ago

Oh right, so the worst that could happen if I plug it straight to mains power (UK) would be that it may trip my house circuit breaker if there is a current overload? Then I would know that I need a starter?

I've done lots of electronics but never gone into motor territory - So I'm somewhat of a rookie! :-)
Thanks for your help so far!

0
steveastrouk
steveastrouk

Answer 8 years ago

Unlikely to be multiple voltage tapped for us - its 230 all the way.

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Zouaoua
Zouaoua

Answer 8 years ago

I've had a look through that and other similar things: I understand the concept of the motor operation, but none of the PDFs go into much wiring detail.

Thanks very much anyway!

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rickharris
rickharris

Answer 8 years ago

The diagrams refer to your motor - a multi meter should allow you to sort out which connection is which and then you can connect it up.

0
Zouaoua
Zouaoua

Answer 8 years ago

Ok thanks I'll give that a go!

0
iceng
iceng

Answer 8 years ago

I enjoyed the 24 pp PDF on induction motors by Rakesh Parekh
of Microchip Technology.

There is an error in fig_3 ( dead short ) probably a drawing error.

A

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steveastrouk
steveastrouk

8 years ago

Clarke is a brand of "Machine Mart" Try ringing them or going to your local branch.
http://www.machinemart.co.uk

Steve

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steveastrouk
steveastrouk

Answer 8 years ago

FREE Technical Advice, 6 Days a week

Monday to Friday 8.30am – 6pm
Saturday 8.30am – 5.30pm

At Machine Mart we want you to get the most out of everything you buy from us and we offer unrivalled aftersales support. Our technical hotlines are manned 6 days a week to ensure you get total peace of mind.

Tel: 0871 410 1260
Fax: 0871 410 1265
Email: technical@machinemart.co.uk

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Zouaoua
Zouaoua

Answer 8 years ago

Ok thanks very much. I've contacted Machine Mart and Clarke via email: hopefully they'll reply with a manual/wiring diagram of some sort!

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steveastrouk
steveastrouk

Answer 8 years ago

Also, look inside the terminal cover - the wiring diagram is often there !

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Zouaoua
Zouaoua

Answer 8 years ago

Don't worry - I've scoured the motor all over to see if there is any sort of wiring diagram! The most information given is that of the nameplate (info I've given in my first post)