what do these 380v wiring colours mean, I want to use with a 220v vfd. it may have had speed control

[speedystu]

Hello, I am a woodworker who has got a large old power feed, its 380v and i want someone to rewire to a 220v vfd for me, can someone please tell me what these old colour codes mean. I bought the machine in Scotland.I can't find any easy diagrams online.I think its a good few years old.Thank you!

1 2 3 4 5 6 7

 

[James]

Most likely you have a star delta wired motor. The 6 wires plus green/yellow (earth) are the ends of 3 separate windings.

It is a little to complex to explain on a forum but it is unlikley to be possible to use a single phase vsd, you will probably need a 3 phase one or a new motor.

To confirm, can you post a pic of the motor rating plate?

 

[speedystu]

Most likely you have a star delta wired motor. The 6 wires plus green/yellow (earth) are the ends of 3 separate windings.

It is a little to complex to explain on a forum but it is unlikley to be possible to use a single phase vsd, you will probably need a 3 phase one or a new motor.

To confirm, can you post a pic of the motor rating plate?

Thank you, i will do that tommorow.

 

[dmxtothemax]

No you cannot just rewire a three phase motor so it will run on a single phase supply,
you can how ever get a electronic convertor / motor speed control
not cheap mind you but will work splendidly

 

[speedystu]

Most likely you have a star delta wired motor. The 6 wires plus green/yellow (earth) are the ends of 3 separate windings.

It is a little to complex to explain on a forum but it is unlikley to be possible to use a single phase vsd, you will probably need a 3 phase one or a new motor.

To confirm, can you post a pic of the motor rating plate?

Thank you, I think i see what you mean about complicated.

View: https://www.youtube.com/watch?v=h89TTwlNnpY


I will have to work out what motor to replace it with, guessing if it is a stardelta motor arrangement this would have to have a separate panel with switches and timers? and 3 phase., this is likely too expensive for me to setup. I need to figure out an alternative to closely match performance, if you could let me know what I should look for off the name plate, that would be amazing.

Iv tried to take good pics, its very shiny and hard to read.

The two pics are of the left and right sides of the plate.

If you're not able to read it, please let me know and I will write it out.

Thanks a million.

 

[James]

Ok, it’s got 6 windings inside, wires star, star.
An unusual setup for such a small motor.
Y is the symbol for star and the triangle is the symbol for delta.

It is probably cheaper to replace the motor with a single phase motor.
Unless you need variable speed.
In that case I would go for a 3ph 230v motor and a vfd

I can’t see any numbers after the triangle n the voltage area of the plate.
[automerge]1576428183[/automerge]
Something like this might do you well
You will have to check dimensions and shaft size etc

Bearingboys

Online

www.bearingboys.co.uk

 

[speedystu]

Thank you very much.

These numbers read off the plate.

380yy delta

0.25kw

1370/80 rpm? I can detach from the gearbox

0,75/0,75 A
Co's 84/.62

Ip44

Have read these straight off

I'm new to motors, 3ph 3 phase 240 v motor

What horsepower or or kw.

How do I know the torque required?

It powers 9 wheels via sprockets and chains. It needs to be strong.

I might have to get a custom mounting plate made.

It's worth getting it working but is there a way I can get a suitable 240v motor at variable speed and suitable torque?

Ok, it’s got 6 windings inside, wires star, star.
An unusual setup for such a small motor.
Y is the symbol for star and the triangle is the symbol for delta.

It is probably cheaper to replace the motor with a single phase motor.
Unless you need variable speed.
In that case I would go for a 3ph 230v motor and a vfd

I can’t see any numbers after the triangle n the voltage area of the plate.
[automerge]1576428183[/automerge]
Something like this might do you well
You will have to check dimensions and shaft size etc

Bearingboys

Online

www.bearingboys.co.uk

 

[James]

Take the original to a local industrial motor supplier and ask for a replacement to your spec. They will be able to sell you something suitable.
£100 to £150 would be my guess

 

[speedystu]

Thanks a million for helping
Next step decide if I need variable speed control

Torque, can we tell what it currently is off the plate?


Will do that re supplier thanks!

Take the original to a local industrial motor supplier and ask for a replacement to your spec. They will be able to sell you something suitable.
£100 to £150 would be my guess

 

[Simon47]

I think that motor will connect as 230V delta and run fine from a variable frequency drive - 380V Y is about 225V delta. The 240V single phase input VFDs drives only output 240V 3P, they don't step up to 415V.
I assume there's a terminal box with a cover you can remove ? Please post a photo of the inside of that showing clearly what's currently connected - and if there's a diagram inside the lid, post a photo of that as well.