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can 60hz motor run 50 hz


jam

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Dear sir,

we have 400volts 50 hz setup can i installe three phase 7.5 hp motor have design 60hz 6pole 1180 rpm if yes to please write me what effect it winding if its life reduce or any effect its efficiency or something else write me detail now i be waiting your responce soon. :)

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Dear jam,

please add more info if you need a professional short reply (not a chapter of a book!).

 

If your motors are labeled 480 V/60 Hz you can use the same motor at 400 V/50 Hz in perfect conditions.

Power will be reduced to 5/6 of nominal power-

 

Regards

Mario

Mario Maggi - Italy - http://www.evlist.it - https://www.axu.it

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Dear jam,

please add more info if you need a professional short reply (not a chapter of a book!).

 

If your motors are labeled 480 V/60 Hz you can use the same motor at 400 V/50 Hz in perfect conditions.

Power will be reduced to 5/6 of nominal power-

 

Regards

Mario

 

Dear Mario,

this motor is running in inlet cooler fan motor which service is 24 hours running and its rating was 7.5hp 60hz460 volt 6 pole 1180 rpm and i want to install it our system 400volt50hz sir can you write me what effect was occur in motor,its winding life is reduce it rpm reduce or its output efficiency effected if yes then write me reason,thanks.

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Dear jam,

I'm sorry but I've not enoght time to reply.

 

The magnetic flux at 400/50 will be very similar to the flux at 460/60.

Being a fan, the asked power will be less, also motor power will be less, but available power will be bigger that requested power. This means that your motor will be safe, less loaded.

Winding life will be extended.

About efficiency, this number cannot be stated so easy, depending from many factors.

The speed of you motor will be probably 985 RPM.

 

Regards

Mario

 

 

Mario Maggi - Italy - http://www.evlist.it - https://www.axu.it

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Hi Jam, one thing to be aware of is that the fans output (i.e. airflow) is proportional to its speed so by reducing the speed by 15% the airflow will also be reduced by 15%. Will this affect the process?

As Mario has said the required power will be less to drive the fan at this speed, in this case around 40% less than at full speed.

 

Ken

An expert is one who knows more and more about less and less until he knows absolutely everything about nothing
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Hi jam

 

Welcome to the forum

 

Further to the excellent replies, you may wish to look at http://www.lmphotonics.com/faq/faq_qanda.php?id=9

 

Best regards,

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