1. Home
  2. tech-talk
  3. 1123883453

Running supply voltage of 60/60 - Vs - 120/Neutral

With the power system im running now, it supplys power at 60 volts and 60 volts each leg, Versus the nominal 120 volt and neautral, im curious as to what the benifits and problems that this may cause for audio equipment, with running no neutral, i get this off of the isolation transformer, as part af a large power system with battery backup to insure than nothing frys in the event of surges and electrical storms, could this possibly cause a better "balance" and maybee increas audio quality? it's definatly a safer system as you would not get shocked unless you touched both legs at the same time.
archangelluke
jea48
2,944 posts
 
Archangelluke
"Im in independence, Missouri, about 30 miles east of KC."

From your picture I figured you lived in the midwest, USA. The mahogany woodwork and sprayed on lacquer finish is typical for homes in the 60s,70s, and 80s, in the midwest.

You had me confused for a while when you mentioned the electrical service in you home being 240V. Now I know you meant 120/240V.

"I had never thought to ground the #5 terminal,but maybee the #0 or the 0Volt tap,i figured it would short the primary, but i will fuse it low and try it, then that would eliminate the 60/60."

What 60/60??

This is an isolation xfmr. The primary and secondary are not connected electrically. Where as on the other hand, autotransformers are.

Before you do anything in regard to grounding term #5 on the secondary of the xfmr please explain to me your statement about "60/60". I fail to see it, as for the secondary of the xfmr we have been discussing. All I see is a 120 volt floating secondary with no reference to ground.

Jim
archangelluke OP
14 posts
 
60/60 otherwords 60 volts to ground on each leg, but 120 between both legs, as in no neutral, just 60/60 and common ground.

Yes, verry good, the house was built in 1956, but i dont believe it mahogany?

Thanks's for the help, were getting closer to a resolution
jea48
2,944 posts
 
Archangelluke
"60/60 otherwords 60 volts to ground on each leg, but 120 between both legs, as in no neutral, just 60/60 and common ground."

The output of your isol xfmr is only 115V if you are using the common term #5 and the tap term #8. The secondary on the xfmr in your picture is a multi tap winding with #5 being one end of the winding and #11 being the other. 170V potential between term#5 and #11.Various taps in between.

A split phase, center tap, winding would be a winding with, say, 120V measured across the total winding and 60V measured from either to the center tap. The center tap is bonded to earth ground. This new grounded point is were any equipment grounds of connected loads would connect to.

Here is some great reading material for you.
http://www.ibiblio.org/obp/electricCircuits/AC/AC_10.html
More to discover