Thread: Need help identifying the electric motor!

Hi all,

I just bought this motor for what appeared to be a song at $20. Now I'm not so sure! I was hoping it was at the very least 415 Y but now I'm not so sure. I have taken it apart but I can't find the Y connection inside. looking at the plate, can someone see something that I can't that would indicate it's 415 Delta?

415 Delta is no good to me! I'll probably get my money back at the scrap metal place but it would be a shame.

Thanks,

Simon

It's a little hard from here Simon, I dont have anything that powerful

Stuart

Yea yea. I know you have some good optical stuff, stuff that would probably rival the Hubble space telescope but I should really include a photo anyway!

Sorry, here it is:

2012-12-17_14-14-23_757.jpg


Also did a search on the MLA 2107 motors and all I could find was this in relation to the starting method:

3.7kW or less: Direct-on-line (full voltage) starting
5.5kW or more: Star-delta starting

From the Fuji website:

Three-phase standard motor | Motors | Fuji Electric Global

Thanks!

Simon

Hi Simon,
I'd say the star point is in there somewhere. While you could make a 415V delta wound motor, there wouldnt be much point(in a motor of this size).


Arent you replacing a 2hp motor? Have you considered running it as is?

Stuart

Hi Stuart,

Are you suggesting that most 3 phase motors of this size are 415V Star wound?

I could give it a try and use it as is, I just assumed it would be way way down on power & torque. I have a power meter, I could hook it up to the input of the VFD and see what it draws, that would give me a pretty good idea.

Cheers,

Simon

Hi Simon,
Yes thats what I am suggesting. I "think" if you wound them for 415delta you could get the same end result but would use more wire......... but I could be wrong.

Thoery says you'll have about 60%hp. I run a couple of motors in delta.
Now what happens above and below rated Hz I dont know. i.e. On a 240V vsd, will a 415V star wired 3hp motor lose less power at 25Hz than a 240V delta wired 2hp motor? And the same at say 75Hz?

Stuart

Hi,
If you are nosing around inside the motor, you should be able to see if 2 coil ends are connected to each terminal lead, if so it is delta, if only one the other end of each coil is connected to a star point some where.
Regards

Thanks Stuart & Duke,

Ah yes I should have thought about that. All Delta wired motors have external wires connected to 2 wires either inside the junction box or inside the motor.

I'll have another look. My last motor was star and the Y point was very easy to find, maybe I was just lucky with that one!

Cheers

Hi guys,

Yep definitely Star wired. I found it, eventually!

Thanks for your help!

Simon

2012-12-17_17-43-47_366.jpg

Regards