You are here

what fuse do I need, yamaha emx66m

For performing musicians and engineers: stagecraft, engineering and gear.

Re: what fuse do I need, yamaha emx66m

Postby James Perrett » Wed Oct 21, 2020 9:51 pm

Hugh Robjohns wrote:
James Perrett wrote:I haven't gone through the rest of the circuit to find out why they need such large values but presumably there's a large inrush current on power up or high peak currents.

From page 26 of the user manual:

For European Model
Purchaser/User Information specified in EN55103-1 and EN55103-2.
Inrush Current: 85A
Conformed Environment: E1, E2, E3 and E4

I wonder how long that current lasts? If it is more than 10ms the fuse should blow (although the fuse is only rated at a max interrupt current of 40A). There's around 32000uF of smoothing capacitors in there which will certainly draw a fair amount of current while charging up.
User avatar
James Perrett
Posts: 9948
Joined: Mon Sep 10, 2001 12:00 am
Location: The wilds of Hampshire
JRP Music - Audio Mastering and Restoration. JRP Music Facebook Page