Another strange motor (to me)

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katratzi

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I need help figuring out how to wire a motor. I seem to have a habit of running into motors that are not the standard NEMA design....


This motor has nine terminals, marked as follows:

Uc Vc Wc

Ub Vb Wb

Ua Va Wa


This is a two speed motor, and it is energized by a certain
contactor arrangement, when one contactor pulls in, the
motor operates at low speed, when another one pulls in,
the operates at a faster speed.

Here is the motor nameplate data:

Made in Slovenia TIGA Electric
3 phase motor | No. 9405/131 | Ident. 12612

Ins. Cl. F | Y-Y 460 460 Volts

IP 54 | 3.00 1.00 kw

cos. | 10.00 12.00 Amps

60 hz | 1728 528 rpm


This motor has been sent to me without any connection
diagrams :confused: . Does anyone know how to wire this
motor ?
 
here's my guess:

U,V, W are the phase designations. Leads Ua, Ub, Uc are all for phase #1 (A phase), Va for phase 2, etc..

The 3:1 ratio of speed and horsepower (kW) implies that it is a two-speed, two-winding motor. A two-speed, single-winding would have a 2:1 ratio.

The two windings on two-speed, two-winding motors are operated separately. The low speed winding is energized for the low speed and just the high speed winding is energized for fast speed.

With nine leads, they could be A = slow, B= fast and C= wye point. (Tie all of the C leads together. Connect A to the slow contactor and the B to the fast contactor.)

Check the leads with an ohmeter to see if you can tell how they are connected internally. If my wild guess is correct, all of the "U" leads will show continuity and the Ua-Uc winding will show about 3 times the resistance of the Ub-Uc. (To get one third the speed, there has to be three times the number of poles so ).

I'll try and check some of our IEC motor data sheets to find something onthis lead callout.
 
After trial and error and not to trump the other thread :)

I found this Page based on "motor tiga phase no. 9405 131"

I don't know if your want to chance it the site has it exactly as stated, but the name of the sight is called download cave.
I don't know, if you want to go./// The Reason why I didn't sign up to retrieve the download, and was redirected from
another site that was out in front of it! So I don't usually post links without check'n so, It's there but it's on you...

HERE

Frankly I'm fighting junk mail as it is... this site reminds me of the old music download page that was killed by other forces!!!!

Hope this helps
 
benaround said:
...

I went there too, 4.98 to download it.
Click to expand...


I didn't even get that far, as soon as they ask for information, like sign -up, I bail...

For the OP;
Use Google, Image, but state " Diagram motor tiga phase no. 9405 131" with any of the combinations of phrase(s) + -,
describing your machine. There wasn't an exact match that I found in the first few pages.

Global Spec came up with a match. I got destracted and didn't link the one I found using diagram,
but it was only 7 leads, but I had asked
for "diagram 9 lead 3 phase motor", it had heaters and control functions in the diagram.
I didn't see an exact match in the first few pages of the inquiry.

Most time if you click on a diagram it jumps to the top and the owner of the diagram pages open up.
You can view any and all diagrams if they jump to the upper part of the window pallet, just click on it.

G.S. requires the user to sign-up and choose a weekly mailing on a subject matter. motors, plastic
enclosures, any number of chooses, if you need literature, but it is Free!

This is not an endorsemment of G.S. but it is interactive, and online much like many manufactures site that will list
there own products. I frankly beleieve G.S. gets paid to list the manufactures products, new to market and maintain
the file for life of product.
 
Last edited:
If this motor is old enough, it could be wired as one would a 9-lead dual-voltage motor (with one set of windings internally joined).

Each phase's pair of windings would be connected in parallel for high speed and in series for low speed, instead of for dual voltages.
 
Thanks for the replies, guys. I found out how to wire this motor.
I just need to look more carefully! The terminals labeled Ub, Vb,
and Wb are not connected to motor leads, but are connected to
a cable that came out from behind the motor terminal connection
box. This was difficult to see at first because this motor is underneath
the machine, and the terminal boxes on these IEC motors are
extremely small and difficult to work within.

But, this cable goes to a three phase brake on this motor, so now I
have only a six lead, two speed 3 phase motor. Much easier to figure
out how to wire!

Thanks for all help!
 
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