AC mains input impedance

[Scott Ronald]

Hi

Does anyone know what a ballpark value for the input impedance at 60Hz
for North American AC mains? Or does this vary wildly from region to
region.


Scott

 

[Phil Allison]

"Scott Ronald"

Does anyone know what a ballpark value for the input impedance at 60Hz for
North American AC mains? Or does this vary wildly from region to region.

** Why not just measure it ??

Use say a kettle that draws a known current - 12 or 15 amps.

Monitor the AC voltage on a DMM when it is connected.

Use ohm law.


....... Phil

 

[Martin Riddle]

Hi

Does anyone know what a ballpark value for the input impedance at 60Hz for North American AC mains? Or does this vary
wildly from region to region.


Scott

It is dependant upon the load you are using. It is the voltage drop/load Current.

http://www.teal.com/products/App note AN-10.htm

Usually you will see the UL required mains impedance on the device label. This is the maximum Impedance require for proper
operation.

Cheers

 

[Phil Allison]

"Martin Riddle"
"Scott Ronald"

It is dependant upon the load you are using.

** Nonsense.

Line Z is a parameter or the ACsupply and hence is independent of the load.

It is the voltage drop/load Current.

http://www.teal.com/products/App note AN-10.htm

** Good, basic link.

Usually you will see the UL required mains impedance on the device label.
This is the maximum Impedance require for proper operation.

** Huh ??

On what planet is the usual ?


........ Phil

 

[Tim Wescott]

Hi

Does anyone know what a ballpark value for the input impedance at 60Hz
for North American AC mains? Or does this vary wildly from region to
region.


Scott

Do you mean the line's behavior at 60Hz, or are you trying to use it for
power line communication or something?

--
Tim Wescott
Control systems and communications consulting
http://www.wescottdesign.com

Need to learn how to apply control theory in your embedded system?
"Applied Control Theory for Embedded Systems" by Tim Wescott
Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html

 

[me]

Hi

Does anyone know what a ballpark value for the input impedance at 60Hz
for North American AC mains? Or does this vary wildly from region to
region.


Scott

Totally idiodic!


What possible reason is there to even ask such a stupid question?!?

For anything you can possibly hook up to it, it is essentially zero....

 

[Phil Allison]

"me the ego tripper "

Scott Ronald


Totally idiodic!

What possible reason is there to even ask such a stupid question?!?

** It ain't stupid at all - fuckwit.

For anything you can possibly hook up to it, it is essentially zero....

** Not one bit true.



........ Phil

 

[me]

"me the ego tripper "


** It ain't stupid at all - fuckwit.

ok, what reason?

** Not one bit true.

how not?

....... Phil

do more than gas. (that is what I'm doing here (no cooping a squat on my
territory))...

 

[Phil Allison]

"me the ego tripper "

Scott Ronald

ok, what reason?

** Many reasons exist to know the impedance of power source.

If YOU cannot imagine even one - it is because

YOU are a TERMINAL FUCKWIT .

how not?

** It ain't zero.

It has a significant effect on the PSUs of many high current draw devices.



...... Phil

 

[me]

"me the ego tripper "


** Many reasons exist to know the impedance of power source.

If YOU cannot imagine even one - it is because

YOU are a TERMINAL FUCKWIT .

You are a total assbag. There is no reason to care about the impedance
of mains source. You use best/worse case voltage in any design.

** It ain't zero.

It has a significant effect on the PSUs of many high current draw
devices.

No, see above, assbag.

 

[Eeyore]

There is no reason to care about the impedance
of mains source.

Why do you think there's 'flat topping' of the mains supply ?

Graham

 

[me]

Why do you think there's 'flat topping' of the mains supply ?

Graham

Still nothing? How sad.

 

[Eeyore]

Still nothing? How sad.

Are you an idiot ?

Graham

 

[me]

Are you an idiot ?

Graham

Is that supposed to be a technical response or just a donkey response?

 

[ChairmanOfTheBored]

Is that supposed to be a technical response or just a donkey response?

He is a fucking retard, but you top him by far. Go back to school,
little boy.

 

[Jamie]

Is that supposed to be a technical response or just a donkey response?

HeeHaw!!!!!!!

 

[legg]

Hi

Does anyone know what a ballpark value for the input impedance at 60Hz
for North American AC mains? Or does this vary wildly from region to
region.

Do you mean the impedance of the mains source, when driven as a load?

This varies widely over frequency, and is heavily dependent on
location and service class.

This is an RF study of a typical household:

http://www.ofcom.org.uk/static/arch...nce/documents/uktwg/finalreport/appendixq.pdf

Power line modem proposals like CENELEC SC205A make good reading.

At the power frequency, impedances are characterized by loading
effects and may be in the tens of milliohms.

RL

 

[legg]

Hi

Does anyone know what a ballpark value for the input impedance at 60Hz
for North American AC mains? Or does this vary wildly from region to
region.

There's a measurement technique suggested by Kwasniok, Bui, Kozlowski
and Stuchly in the IEEE Transactions on EMC Vol35 #1 Feb'93.

RL

 

[Nico Coesel]

Totally idiodic!


What possible reason is there to even ask such a stupid question?!?

For anything you can possibly hook up to it, it is essentially zero....

It is not. Every conductor has a capacitance and inductance. Because
of the vast distances of the mains grid, the inductance has a
significant influence. The mains is not only used to supply power, but
also to remote control stuff like lantarns and metering devices (over
here there is a day and night tarif). And there are all kinds of
standard to transport data over mains. My guess is the OP wants to
build or use a device that transports data over the mains.

 

[Michael A. Terrell]

HeeHaw!!!!!!!

Always an ass, aren't you?

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida