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 Which fuse for 400w amplifier?
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Ashirdaniel
Apprentice

India
52 Posts

Posted - Jan 22 2017 :  03:55:36 AM  Show Profile  Send Ashirdaniel an AOL message  Reply with Quote
Which fuse should we use with a 400w amplifier.? It uses a step-down transformer with 27-0-27 10A, 12-0-12 1A and 18-0-18 1A secondary AC main is 230V. Fuse need to be placed before transformer. So power switch, transformer and fuse will be in series.

Dany

Aaron Cake
Administrator

Canada
6693 Posts

Posted - Jan 23 2017 :  11:29:41 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
400W / 230V is 1.73A. So a 2A fuse should do the trick as long as startup inrush current isn't large.
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Ashirdaniel
Apprentice

India
52 Posts

Posted - Jan 25 2017 :  08:56:35 AM  Show Profile  Send Ashirdaniel an AOL message  Reply with Quote
Thank you. My power supply uses 14700uf electrolytic caps on each rail of 27.0.27 supply, (( 10000+ 4700)*2), 4700uf each on 18-0-18 1A part and another 4700uf on 12V 1a part. How will be the inrush current?

Dany

Edited by - Ashirdaniel on Jan 25 2017 08:57:21 AM
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