Re: Isolation Transformer



Phil Allison wrote:

> <pfjw@xxxxxxx> = fool
>
> > You are utterly clueless, aren't you.
>
> ** You are one *very dangerous* ignorant, fuckwit - Wieke.
>
> > Do you have even an iota of how an isolation transformer operates?And
> > how it is substantially different from a Ground Fault device?
>
> ** That is *exactly* what I posted about and you snipped out of sight -
> ARSEHOLE !!

A bit of frivolity follows-

Arsholes are cheap today,
Cheaper than yesterday!
Try one & you will say,
Arsholes are cheap today!!

( sung to the early 1900's tune of 'Tah-Rah-Rah-Boom-TEE-A', with gusto,
perhaps after a few beers)

Everyone has one. John Stewart

>
>
> LEARN TO QUOTE WHEN YOU POST !!!!!!
>
> > You have,
> > if anything, defined how a GFCI device would fail to protect,
>
> ** So you have no comprehension of my post at all ?
>
> By not answering any of the points I raised it sure looks that way.
>
> How about you try again ??
>
> " > And if a winding on the power-transformer is shorted to the case?
>
> ** If an Iso tranny * IS * used then the scenario becomes very dangerous,
> the live internal AC supply wires are lethal if touched - contrary to the
> tech's expectations.
>
> > If a line-bypass cap is shorted?
>
> ** If an Iso is used the scenario becomes very dangerous, the active AC
> wire is lethal if touched - contrary to the tech's expectations.
>
> > If any of several other scenarios obtain?
>
> ** All of them are far more dangerous to a tech's life than using an ELCB.
>
> > An isolation transformer is a SAFETY ITEM.
>
> ** It is a fool's safety item. "
>
> It is a **fool's safety item** because using it hides dangerous AC supply
> wiring faults in equipment and THEN allows the faulty item to operate
> apparently normally with the internal AC wiring referenced to the chassis.
>
> With such faults ( like YOU described ) the wiring can deliver a lethal
> shock to a tech who was expecting the AC wiring to be safe to touch.
>
> Using one also prevents an ELCB fitted in the premises or particular AC
> supply circuit from operating to save life.
>
> An Iso tranny should only be used where it is essential to do so - ie with
> live chassis gear and off line SMPS.
>
> ........ Phil

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