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#36901 - 02/19/24 10:23 PM Modernization Power  
Joined: Aug 2016
Posts: 743
Jluff Offline
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Jluff  Offline
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Joined: Aug 2016
Posts: 743
If you have a 100amp service to your disconnect and the new controller manufacturer is recommending 45 amp. What size should the disconnect fuses be ?

#36902 - 02/19/24 11:20 PM Re: Modernization Power [Re: Jluff]  
Joined: Oct 2013
Posts: 174
NOTIME Offline
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Joined: Oct 2013
Posts: 174

Last edited by NOTIME; 02/19/24 11:20 PM.
#36905 - 02/20/24 03:17 PM Re: Modernization Power [Re: Jluff]  
Joined: Aug 2016
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Jluff Offline
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Jluff  Offline
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Thank you.

#36906 - 02/20/24 04:48 PM Re: Modernization Power [Re: Jluff]  
Joined: Apr 2020
Posts: 396
Montana Online content
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Montana  Online Content
enthusiast

Joined: Apr 2020
Posts: 396
Usually the controller manufacturer will list the mainline disconnect size on the print. In your case they are probably calling out a 45 amp disconnect so 45 amp fuses. They should of calculated this load off of your survey of the equipment being modded. What equipment and controller are you going with?

#36907 - 02/20/24 05:47 PM Re: Modernization Power [Re: Jluff]  
Joined: Aug 2016
Posts: 743
Jluff Offline
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Jluff  Offline
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Joined: Aug 2016
Posts: 743
Alpha Controller
Canton Power Unit.
480v
25 HP motor.
I think FLA was 33.9
75fpm

Last edited by Jluff; 02/20/24 05:49 PM.

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