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Old 25th Jan 2023, 2:52 pm   #34
Roger Ramjet
Heptode
 
Join Date: Feb 2022
Location: Leicestershire, UK.
Posts: 690
Default Re: Isolator Transformer Query

Quote:
Originally Posted by G6fylneil View Post
I used the L, N, & E designations simply because the transformer output is fitted with a BS1363 socket, it's terminals are labeled L, N, and E. I think that in the UK both Line and Neutral are considered to be "live" these days as they are "connected to the source of supply". The measured voltage was different for the two terminals, and my readings were lower than Lucien's, presumably because my transformer has a smaller VA.
I measure 320pF secondary to earth, 280pF secondary to primary, and 540pF primary to earth, but that's got 1.3M of 3-core flex on it.
One could argue that an isolating transformer should be fitted with a old fashioned two pin socket especially when connecting vintage "live chassis"'' equipment which originally would have been supplied with a two pin plug.

Conversely, is it best practice to plug an appliance with an earth wire and extraneous metal parts into a BS1363 3 pin socket of an isolating transformer?

Rog
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