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Re: Variac Wiring
From: D.C. Cox[SMTP:DR.RESONANCE-at-next-wave-dot-net]
Sent: Monday, December 08, 1997 6:07 PM
To: Tesla List
Subject: Re: Variac Wiring
to: Adam
Pin 5 is commonly used to provide over voltage or under voltage operation
in areas where 120 VAc isn't the common source. Example -- Japan used a
100 volt standard. In the US east coast uses 208 V a lot while midwest
uses 220 volt and many west coast areas use 240 v.
>
> From: Adam[SMTP:absmith-at-tiac-dot-net]
> Sent: Sunday, December 07, 1997 7:57 PM
> To: tesla list
> Subject: Variac Wiring
>
>
> I had to take apart my variac (Powerstat 116, 120V 7.5A 1PH) today to
> replace the switch, and when I removed the housing, I found two
> unconnected terminals numbered 4 & 5. The schematics seem to be like
> this:
>
> ____ 1
> (
> 5 ___(
> (
> (
> (<--- 3
> (
> (
> (
> 2 ___(
> (
> (____ 4
>
> The variac was originally connected to the mains at 1 & 2, and to the
> outputs with 1 & 3. This gives a maximum of 140V. If I connect the mains
> to 2 & 5 and the outputs to 1 & 4 I get about 170V. Any reason for these
> extra bits of winding?
>
> -Adam
>
>
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> absmith-at-tiac-dot-net
> Epoch, Inc. Digital Music Project
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>