Higher size starter lowr size Motor
Higher size starter lowr size Motor
(OP)
Hi,
This is my first question on Motor forum.
I was wondering, can I use a 60 HP fan motor on a size 5 NEMA starter which is good between 100-200 HP motors.
Actually, the client does not want to buy a new starter and wants to use same starter when he is done with 60 HP fan application, he will replace it with 125 HP.
I spoke to Allen Bradely and their tech support advised me that you can do that but you will have to have a new overload for 60 HP fan(size 4 starter overload) and replace with size 5 starter overload.
Could you kindly advise, if any one of you have ever come across issues like that.
Thanks
This is my first question on Motor forum.
I was wondering, can I use a 60 HP fan motor on a size 5 NEMA starter which is good between 100-200 HP motors.
Actually, the client does not want to buy a new starter and wants to use same starter when he is done with 60 HP fan application, he will replace it with 125 HP.
I spoke to Allen Bradely and their tech support advised me that you can do that but you will have to have a new overload for 60 HP fan(size 4 starter overload) and replace with size 5 starter overload.
Could you kindly advise, if any one of you have ever come across issues like that.
Thanks





RE: Higher size starter lowr size Motor
In other designs the heaters are not changeable and the entire overload relay must be changed. This is more expensive.
Be sure to use the proper sizing chart for overload heaters.
A 60 Hp. motor may not use the same heaters in a size 4 starter as it will in a size 5 starter. This is an issue with some other manufacturers but I am not sure about Allen bradley specifically.
respectfully
RE: Higher size starter lowr size Motor
RE: Higher size starter lowr size Motor
if we use an Motor Cicruit Protector, do you think we still might have an issue with that ?
I beleive in a MCP, you can just change the settings on the dial.
Other option possible could be, Change the fuse and overload as required and we are fine ?
Thanks
RE: Higher size starter lowr size Motor
The contactor can be used, but short circuit and overload protection will have to be changed out to match the motor FLA.
RE: Higher size starter lowr size Motor