[Prev][Next][Index][Thread]
transformer type?
----------
From: Basura, Brian [SMTP:brian.basura-at-unistudios-dot-com]
Sent: Wednesday, August 19, 1998 3:40 PM
To: 'Tesla List'
Subject: RE: transformer type?
Jim,
Here is Bert's reply to me when I asked a similar question....
Brian
Brian,
These are specially constructed metering transformers that typically
consist of a single-turn primary (sometimes just a single,
large-diameter straight conductor, not even a "loop" of any kind)
surrounded by a multiple-turn secondary coil. This configuration is sort
of like a step-down transformer for current instead of voltage. This
configuration will use a relatively low range full-scale range ammeter
(typically 5A Full-Scale) on the secondary side. The full-scale meter
face of the ammeter is "re-scaled" to reflect the ratio of the
transformer.
In the case of your 60:1 current transformer, a 5A full-scale meter
would be scaled to read 0-300A or 0-600A for the 120:1 ratio. Because 5A
meters are very often used, most current transformers will come in
ratios of XXX:5. Also, many consist only of the secondary winding in the
shape of a large ring that can be slipped over a bus-bar, or where the
primary can be a large wire that can be looped through the transformer.
Other than for remote current metering (for example for power
transformer primary current), these rally have little other practical
use in coiling.
-- Bert --
> From: Dsurfr-at-aol-dot-com [SMTP:Dsurfr-at-aol-dot-com]
> Sent: Tuesday, August 18, 1998 3:16 PM
> To: tesla-at-pupman-dot-com
> Subject: transformer type?
>
> I picked up a transformer off a friend who was literally going to use it
> for a
> boat anchor. The plate says Sangamo type SMC-150 current transformer
> 30:5A.
> Does anybody out there have any info on this type & if it would be at all
> usable for any kind of Tesla work. If not it sure is heavy enough to make
> a
> darn good anchor.
> Thanks for any help. Jim
>
>