Subject: measuring current in a 220 ac circuit
 

Sorry I screwed up let see how can I word this
The power source is always with in phase it is what we are
powering up in order to run you must change the phase
example if you have three phase motor each phase
will be 120 degree out of phase but if you have single phase
motor primary windings must change phase by 90 degrees
in order for motor to start up, that is what centrifugal switch is
use for and capacitor, if this is not done motor will simply sit
there and humm, this two setups are must common types for
motor starting configurations in industries. on the pure resistive
load there is no phase shift.

Look in any system if you have two wires going to a load each
wire will carry same amount of current it does not matter if is
120 or 220 or 480 if is light to be light or motor to be run both
wire/legs will carry identical current regardless if is neutral or hot,
positive or negative current is equal in both legs, in three phase
system current will depend on the balance of electrical components
to be powered and voltage supplied this are basics and they
do not change

By the way 180 degree shift is never use that I know of in
electrical use however in electronics yes and terminology
is antiphase, it is use in amplifications (tube type)

Subject: measuring current in a 220 ac circuit
 

Tony wrote:
hange

By the way 180 degree shift is never use that I know of in
electrical use however in electronics yes and terminology
is antiphase, it is use in amplifications (tube type)



If you think about a "pole pig" transformer with its primary energized
by a single phase high voltage line and its secondary delivering 230 VAC
to houses you'll have to agree that there's a 180 degree phase shift
"created" between the two sides of the 230 volt output. G

Jeff

--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10^12 furlongs per fortnight.

Subject: measuring current in a 220 ac circuit
 

"Jeff Wisnia" wrote in message
...
Tony wrote:
hange

By the way 180 degree shift is never use that I know of in
electrical use however in electronics yes and terminology
is antiphase, it is use in amplifications (tube type)

If you think about a "pole pig" transformer with its primary energized by
a single phase high voltage line and its secondary delivering 230 VAC to
houses you'll have to agree that there's a 180 degree phase shift
"created" between the two sides of the 230 volt output. G

Jeff

--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10^12 furlongs per fortnight.

What is interesting to me about these recurring discussions is that nearly
everyone has the concepts right, but they just disagree on what to call
them. Incidentally, the amplifier reference is commonly caused a "phase
splitter" or "phase inverter" and does absolutely no phase shifting but
gives the same effect only for symmetrical waves by inverting the signal.
There are many points of confusion caused by terminology. In a 120/240
system, many well qualified electricians will refer to "the two phases,
phase A and B, or phase 1 and 2" and some will even refer to it as a "two
phase system". However, a "two phase system" as described in texts and in
engineering terms, refers to something entirely different. It is unfortunate
that we are not always careful to use language that will clearly describe
the idea to the intended audience.

Don Young (Retired electrical and electronic training specialist)

Subject: measuring current in a 220 ac circuit
 

A Multi tapped transformer having windings with higher
or lower resistance and higher and lower inductance can
split the phase.
"Tony" wrote in message
news:MLpyi.6964$A57.858@trnddc04...

Sorry I screwed up let see how can I word this
The power source is always with in phase it is what we are
powering up in order to run you must change the phase
example if you have three phase motor each phase
will be 120 degree out of phase but if you have single phase
motor primary windings must change phase by 90 degrees
in order for motor to start up, that is what centrifugal switch is
use for and capacitor, if this is not done motor will simply sit
there and humm, this two setups are must common types for
motor starting configurations in industries. on the pure resistive
load there is no phase shift.

Look in any system if you have two wires going to a load each
wire will carry same amount of current it does not matter if is
120 or 220 or 480 if is light to be light or motor to be run both
wire/legs will carry identical current regardless if is neutral or hot,
positive or negative current is equal in both legs, in three phase
system current will depend on the balance of electrical components
to be powered and voltage supplied this are basics and they
do not change

By the way 180 degree shift is never use that I know of in
electrical use however in electronics yes and terminology
is antiphase, it is use in amplifications (tube type)

Subject: measuring current in a 220 ac circuit
 

A resistance start induction run Motor splits the phase
by app 30 degrees due to the higher Inductance of the
Run winding and higher resistance of the start winding

"Tony" wrote in message
news:MLpyi.6964$A57.858@trnddc04...

Sorry I screwed up let see how can I word this
The power source is always with in phase it is what we are
powering up in order to run you must change the phase
example if you have three phase motor each phase
will be 120 degree out of phase but if you have single phase
motor primary windings must change phase by 90 degrees
in order for motor to start up, that is what centrifugal switch is
use for and capacitor, if this is not done motor will simply sit
there and humm, this two setups are must common types for
motor starting configurations in industries. on the pure resistive
load there is no phase shift.

Look in any system if you have two wires going to a load each
wire will carry same amount of current it does not matter if is
120 or 220 or 480 if is light to be light or motor to be run both
wire/legs will carry identical current regardless if is neutral or hot,
positive or negative current is equal in both legs, in three phase
system current will depend on the balance of electrical components
to be powered and voltage supplied this are basics and they
do not change

By the way 180 degree shift is never use that I know of in
electrical use however in electronics yes and terminology
is antiphase, it is use in amplifications (tube type)