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Phil Allison Phil Allison is offline
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Default What is wrong here ?


"flipper the steaming great turd"


Its not the only shonky thing one might buy, and
I bought a 500W rated variac from Jaycar last summer.


The fuse is on the input.



** As the " Mythbusters " say

" well - there's your problem ..... "


The fuse protecting a variac ** MUST ** be in the secondary circuit !!!


I don't think so,



** Asperser's ****ed morons like YOU have no rational thoughts.

otherwise you have no fault protection for like, say a shorted winding.



** That is not protection of the damn variac !!

Cos by then, it has already burned out.

****WIT !!!!!!!!!!!!!!!!!!!!



It needs to be a delay or "slo-blo" type of the same nominal amp rating as
the variac.

Having the fuse on the input to the variac provides progressively less and
less protection as the voltage setting is reduced - finally providing none
at all.


Well, even an output fuse isn't 'perfect' because max current at mid
scale is less than at 1-1 so if you 'protect' mid scale you limit the
perfectly valid max VA at 100% Vo.



** Wot complete ****ING drivel.


A variac handles its * rated * current at any setting !!!!!!

The output fuse is there to protect it from an inadvertent current overload.

It is a MASSIVE blunder to have the ONLY fuse on the input !!!!!


YOU STEAMING GREAT ****WIT !!





...... Phil