https://share.icloud.com/photos/0cOpuf_K8U5WTadpZFHcaJeng
damn mike stop being so cheap on the upload file size hahaha just kidding
damn mike stop being so cheap on the upload file size hahaha just kidding
PS Audio Stellar Power Plant 3
- Thread starter JayT
- Start date
If you can follow my very bad drawing take not it’s still grounded but has only 1 ground path to follow. Unlike typical homes thst have many this in a big way causes ground loops.
also note it’s still grounded. but the ground is not tied to the ground plain of ur home.
also note it’s still grounded. but the ground is not tied to the ground plain of ur home.
Speedskater
Member
Thanks, that turned out to be a bigger challenge then either of us expected.
208 Volts, is this part of a 3 phase power system?
* * * * * * * * * *
from an old Middle Atlantic white paper:
also from that paper:
Middle Atlantic on Ground Myths
Myth #1) An “Isolated Ground” system is not connected to ground.
MYTH BUSTED! “Isolated ground” systems connect to “ground” at the neutral-ground bond point in the main circuit panel, and must be insulated from any other ground connections. If equipment is mounted in a rack, to conductive rack rails, the rack itself must also be insulated from any other grounds, including concrete or conduit, to function as designed.
Myth #2) A supplemental (auxiliary) ground rod is a place where “noise” wants to go.
MYTH BUSTED! Noise will always flow back to the source; noise does not want to flow to earth. In addition, the NEC mandates that any supplemental (auxiliary) ground rod be bonded to the neutral-ground bond of a separately derived system, the main service neutral-ground bond or the grounding electrode system. Improper bonding of a supplemental (auxiliary) ground rod is dangerous! Any attempt to use a supplemental (auxiliary) ground rod as a magical sink for “noise” will most likely fail, and result in circulating currents flowing in the ground wires, most likely
Myth #3) The earth’s soil is an effective safety grounding point.
MYTH BUSTED! Earth ground is not a substitute for safety ground. Driving independent, un-bonded ground rods into the earth does not provide a low enough impedance to trip circuit breakers, is a violation of the National Electrical Code, and can be life threatening when used as a safety ground.
Myth #4) More grounds = quieter systems.
MYTH BUSTED! Ground only where required for safety. Any additional grounds may provide or create additional paths for ground loops and increase system noise.
208 Volts, is this part of a 3 phase power system?
* * * * * * * * * *
from an old Middle Atlantic white paper:
also from that paper:
Middle Atlantic on Ground Myths
Myth #1) An “Isolated Ground” system is not connected to ground.
MYTH BUSTED! “Isolated ground” systems connect to “ground” at the neutral-ground bond point in the main circuit panel, and must be insulated from any other ground connections. If equipment is mounted in a rack, to conductive rack rails, the rack itself must also be insulated from any other grounds, including concrete or conduit, to function as designed.
Myth #2) A supplemental (auxiliary) ground rod is a place where “noise” wants to go.
MYTH BUSTED! Noise will always flow back to the source; noise does not want to flow to earth. In addition, the NEC mandates that any supplemental (auxiliary) ground rod be bonded to the neutral-ground bond of a separately derived system, the main service neutral-ground bond or the grounding electrode system. Improper bonding of a supplemental (auxiliary) ground rod is dangerous! Any attempt to use a supplemental (auxiliary) ground rod as a magical sink for “noise” will most likely fail, and result in circulating currents flowing in the ground wires, most likely
Myth #3) The earth’s soil is an effective safety grounding point.
MYTH BUSTED! Earth ground is not a substitute for safety ground. Driving independent, un-bonded ground rods into the earth does not provide a low enough impedance to trip circuit breakers, is a violation of the National Electrical Code, and can be life threatening when used as a safety ground.
Myth #4) More grounds = quieter systems.
MYTH BUSTED! Ground only where required for safety. Any additional grounds may provide or create additional paths for ground loops and increase system noise.
Attachments
Speedskater
Member
Three phase to single phase often has additional problems.
for a permanently installed big isolation transformer, a 240V or 208V primary is a better plan.
much of that 'sign wave distortion' is generated by the audio amplifier.
the so called 'DC offset' is actually asymmetry of AC power wave.
it's only a problem when the line voltage is higher than the component design voltage or the power transformer was poorly chosen.
for a permanently installed big isolation transformer, a 240V or 208V primary is a better plan.
much of that 'sign wave distortion' is generated by the audio amplifier.
the so called 'DC offset' is actually asymmetry of AC power wave.
it's only a problem when the line voltage is higher than the component design voltage or the power transformer was poorly chosen.
To be honest dc or sign wave distortion is a big issue in audio but more so in post amps having a larger then 500 watt. The reason for the sizing is due to its inherent higher a resistance of the windings.
what the distortion. Does is saturate the core making it loose it’s power to the amp.
now there are products made to block dc but these limit the current. A iso like I depicted is a both phases of a typical power used in most all homes.
Nutrick and others make such a iso transformer. It’s called a balanced iso transformer. Now this effectively greatly lowers the input distortion. The reason it does is cause most dc offset is based in our homes from switching psu
heavy resistive loads that switch on and off. While there can be some phase to phase distortion it’s far less likely
so when we use a balanced input iso scheme. This does a few great things for audio.
1- it lowers dc offset
2- lowers common mode noise on the lines again from sw psu , dimmers
many in home appliances.
3- of the ground is isolated as I showed it yields only one ground path.
now it’s true some of our audio products do produce noise it’s true
but the addition of a noise filter board using a capacitor and choke designed to be active at the high frequency noise produced and a good one works on more then one freq so it works on base and harmonic frequencies.
I’m in no way laying claim we all need this. And ps audio makes very good power products.
laslty if I gone way into the weeds here I’ll say I’m sorry now and I mean it.
what the distortion. Does is saturate the core making it loose it’s power to the amp.
now there are products made to block dc but these limit the current. A iso like I depicted is a both phases of a typical power used in most all homes.
Nutrick and others make such a iso transformer. It’s called a balanced iso transformer. Now this effectively greatly lowers the input distortion. The reason it does is cause most dc offset is based in our homes from switching psu
heavy resistive loads that switch on and off. While there can be some phase to phase distortion it’s far less likely
so when we use a balanced input iso scheme. This does a few great things for audio.
1- it lowers dc offset
2- lowers common mode noise on the lines again from sw psu , dimmers
many in home appliances.
3- of the ground is isolated as I showed it yields only one ground path.
now it’s true some of our audio products do produce noise it’s true
but the addition of a noise filter board using a capacitor and choke designed to be active at the high frequency noise produced and a good one works on more then one freq so it works on base and harmonic frequencies.
I’m in no way laying claim we all need this. And ps audio makes very good power products.
laslty if I gone way into the weeds here I’ll say I’m sorry now and I mean it.
UltraFast69
New member
Jack
Active member
It's just not that complicated.
UltraFast69
New member
Great now I get to read you and hear him [emoji22]
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