Home Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ Tweakers' Asylum ]
[ Alert Moderator ]

RE: Zerozone 100VA PSU Fuse Issue

POST EDITED:

100VA is being used as a marketing designation since it does not have an actual model number. The PSU features a 100VA toroidal transformer rather than the rated output of the PSU.


100VA transformer / 120Vac = 0.83 amps. As for the sizing of the AC line fuse protection to protect the transformer from overload multiply by, (anywhere from 110% to 250%. Depends on the designer of the piece equipment.)

0.83 amps X 200% = 1.66 amps. Stock fuse ampere rating 1.6A
0.83 X 250% = 2 amps.

Max FLA rating for the secondary of a 100VA transformer,
100VA / 12V = 8.3 amps. (Designer may have cut it back to 6 amp due to the full wave rectifier he used and or because of size of voltage regulator, if used).

Duster,
I EDITED my post.

I should have reread your original post. I misunderstood what you were saying. The pictures of the fuses in your post are 2 amp slow blow fuses.
http://www.littelfuse.com/products/fuses/cartridge-fuses/5x20mm-fuses/215/215002.aspx
If the seller said to use 1.6 amp fuse only, he must have a reason.

The 1.6 amp rated fuse should not have blown with only a connected 3 amp continuous connected load.

3 amps X 12Vdc = 36 Watts.

As, I think someone said in an earlier post, place a DC ammeter in series with the connected load and watch the meter while the 3 amp connected load is fully loaded.



Edits: 07/22/17 07/23/17
This post is made possible by the generous support of people like you and our sponsors:
  Atma-Sphere Music Systems, Inc.  

Follow Ups Full Thread
Follow Ups
FAQ

Post a Message!

 Forgot Password?
Moniker (Username):
Password (Optional):
  Remember my Moniker & Password  (What's this?)    Eat Me
E-Mail (Optional):
Subject:
Message:   (Posts are subject to Content Rules)
Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:  Automagically notify you when someone responds.

[ Top Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2024, Audio Asylum, all rights reserved ]
[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]