RE: NST types

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Lau, Gary by way of Terry Fritz <teslalist-at-qwest-dot-net>" <gary.lau-at-hp-dot-com>

NST secondary voltages commonly come in 3, 4, 6, 7.5, 9, 12, and 15kV 
flavors.  For the lower voltages, 3, 4, & 6kV (I'm not 100% certain where 
the cutoff is), they have a single secondary winding with one side of the 
secondary grounded to the core.  Higher voltage NST's have two windings, 
each with one side grounded to the core, resulting in a mid-point-grounded 
configuration.  A 15kV NST will definitely have the midpoint grounded.

NST's are available in both 120 and 240V primary voltages.  Also, beware 
that a 3rd (though uncommon) variant with a 277V primary is sometimes used 
in the states

Secondary currents are commonly 30 & 60mA, though 12kV & 15kV units are 
most often the smaller 30mA variety.  I've heard of 120mA units, but these 
seem to be very rare.  I've never heard of anything higher than a 15kV 
unit.  Happy hunting!

Gary Lau
MA, USA


Original poster: "Gerry Reynolds by way of Terry Fritz 
<teslalist-at-qwest-dot-net>" <gerryreynolds-at-earthlink-dot-net>

Im new to NSTs and want to know what configurations they come in?
Are outputs always CT?   Is a 15KV CT output 15KV on each side of the CT or
the total across both poles?
Do they come in both 120 input and 240 input?
What is the largest available NST?  15KV -at- 60ma?  or are there larger KVs
or higher currnet ones?
Thanks for any info provided.

Gerry Reynolds
Ft Collins, CO USA