Can A 50 Hz Motor Be Run On 60 Hz?

T. J.

T. J.

H-M Supporter - Gold Member
H-M Supporter Gold Member
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I am looking at a Baldor 1/2 HP 3 phase motor, Catalog number M3538-50. On the nameplate it is labeled 50 Hz and 1425 RPM. Would it be safe to run this motor on 60 Hz? I understand that it would run at 1725 RPM (which is what I want). Most motor nameplates that I have seen specify that they can be wired for either frequency.

I just want to make sure that I can use this motor before I buy it.
 
I would expect a motor intended for 50 hz. operation, if anything, to be more efficient at 60 hz.
 
I wouldn't hesitate to run that motor as long as the voltage is correct. You are correct in thinking it will run faster. Frequency is speed in electrical terms.
 
I think it will actually run at 1710 rpm : 6/5 = 1.2 x 1425 = 1710 feel free to check my math
MS
 
I believe that is a 3 phase motor which is fine if that's what you are looking for.
 
Thanks for the replies. The motor is on its way and soon to be mounted on my Logan lathe.
 
http://elec-toolbox.com/Formulas/Motor/mtrform.htm
A four pole 60hz motor will ideally run at 1800 rpm. Under load, in real conditions, it is somewhat less. You will see various numbers like 1710, 1725, and 1750 rpm on 4 pole 60hz motor data plates. I think that motors are rated at some fairly high load, perhaps full rated load.

Well, quality industrial rated domestically built motors anyway. Cheap motors are rated using some Hocus Pocus method that makes them more than 100% efficient. I have two 115v shop vacs with 15 amp plugs that both claim 5.5hp. Sorry, that is impossible, unless smoke and mirrors are involved...
 
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