Motor lead hookup to older Japanese motor

[KpPERSON]

Hello,
I have an Onikaze blower motor that I need to change to 480 volt from 240. The leads from the motor are as follows: U1, U2, V1, V2, W1, W2 plus X, Y, and Z (9 lead). The original printed info on the cover for the leads have long faded. It is a type CS-102, 3 phase 2 pole motor.
Thanks in advance for any help.

 

[waross]

Tell us which leads are now connected to power and which leads are jumpered together.
From there it will be fairly straightforward.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[flexoprinting]

For this motor?

Link

Chuck

 

[KpPERSON]

Well, after I took off the cloth tape to check for wire tags, I discovered there were none.
I believe L1 went to U1&U2, L2 to V1&v2, L3 to W1&W2. X,Y,& Z were connected together.

 

[edison123]

This one. For each voltage, you can connect in wye or delta. You need to know whether your existing winding is wye or delta.

Your
U1/U2/X = 1/4/7
V1/V2/Y = 2/5/8
W1/W2/Z = 3/6/9

Muthu

http://www.edison.co.in

 

[waross]

If ypu have continuity between 7, 8 and 9, use the star connections.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[edison123]

If for 480 V, you have XYZ connected, it is a single wye.

For 240 V, you need to connect it as double wye. Follow the top row 2nd connection in the picture.

Muthu

http://www.edison.co.in

 

[KpPERSON]

Waross, Edison123,
Thank you both very much for your replies/help. It appears you are both in agreement. I will attempt your suggestion. Waross, you stated in your last reply “for a North American motor”. What about this Japanese motor? I really don’t want to smoke this motor on power-up. I am familiar with your standard 230 to 480 changeover on motors, but am not familiar with leads numbered
u,v,w 1&2 and x,y,z. The lead numbers are embossed on the rubber that the leads come through from the inside of the motor.
I don’t think I mentioned that this blower is used to cool a dc motor. It is directly mounted to the dc motor.
Any concerns with a standard 230 to 480 changeover? I wasn’t sure.
Again, thank you very much.

 

[waross]

I just re-read your original post.
You are going from 240 Volts to 480 Volts.
For 480 Volts the connections are the same for either wye or delta.
The main concern is proper protection. The current and the overload settings will be 50% of the original.


Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[KpPERSON]

So it’s the same as good ole American motors.?
And yes, I do need to check the overloads for proper settings. I’ve never dealt with a motor with leads numbered like that.

 

[zlatkodo]

Maybe this helps.
Nameplate of a very old Italian motor.

More at:
Tech Support in Motor Rewind