Re: [CAD_CAM_EDM_DRO] OT Electric Motor Question

Hello Tom,
Finally an electric cuestion out of my experience.
Generally if you have both options you use the motor at 240V on delta
and 440V on star connection. Only if it says exclusively 440V Star/delta
then you have a motor you start in star and later switch it to delta for
not to have such a high initial current.

Connection: RST=incoming line, UVW=coils
Star 440V:
R-U1
S-V1
T-W1
W2-U2-V2

Connection 240V Delta:
R-U1-W2
S-V1-U2
T-W1-V2

You are generally surposed to have the high line (208V to ground)
in red on S and in order to switch the direction of turning
you switch the lines R and T.

I hope this helps a little further.
Good luck
Sven Peter

tcsibor@... wrote:

>
> Sorry for being a bit off topic, but I know that the knowledge on
> this group can help. I have a machine with a 3 phase 440 VAC motor.
>
> This motor (Bosch) has 6 leads and the wiring plate indicates that it
> can be wired star (Y) or Delta. The plate also says that it is "440 Y
> (star)"
>
> Does this mean that if it were wired delta, it would operate on 220
> VAC? If not, then why would one set it up for Delta over Star or vice
> versa?
>
> Many thanks
> Tom Csibor
>
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