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V3= Voltage across the supply
V2= voltage across inductive load
V1= Voltage across known resistance
R= Known resistance
Cos (Phi)=(V32-V12-V22)/2v1v2
power = (V32-V12-V22)/2R
Wiki User
∙ 12y ago
Wiki User
∙ 12y agoThe question is unclear. If the answer does not address the correct issue, please restate the question with more details.
Three phase voltage can be measured in star, each leg to neutral, or in delta, each leg to a different leg. Assuming that neutral is balanced in the center of the phase triangle, the star voltage is the delta voltage divided by 1.732. 1.732 is the square root of 3, and comes from the phasor analysis of three phase power.
For instance, a typical three phase distribution line at 13.2 KV delta, is 7.62 KV star.
Another example is that if you know the winding current in delta, the phase current is 1.732 times the winding current.
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How do you check a dc ammeter?
a dc ammeter is a ammeter which has three pins and it works by two wires.
What is the conclusion of the experiment 3-ammeter method of measuring single phase power and power factor?
This is too complicated to describe on this forum, but there are lots of web pages that describe the 'three-ammeter' method of measuring power, so your best plan is to visit one of those sites.
What is the three ammeter method?
I am assuming that you really want to use ammeters to measure power in a balanced 3 phase system. (hope you are not meaning 3 watt meter method) Power in Watt in a three phase system is equal to 1.73 x line voltage x line current x power factor. You need to know line voltage, power factor also in addition to current to compute the power. If the system is balanced then actually you do not need to connect ammeters in all three lines. One ammeter reading will do.
How can you connect current transformer to ammeter in three phase?
You use three CTs, one per line conductor, each feeding a separate ammeter,
What is the importance of ammeter?
An ammeter measures current, an important variable in electronics.
Resistance and power measurement by voltmeter-ammeter method?
single phase power measure by three ammeter method
How do you check a dc ammeter?
a dc ammeter is a ammeter which has three pins and it works by two wires.
What is the conclusion of the experiment 3-ammeter method of measuring single phase power and power factor?
This is too complicated to describe on this forum, but there are lots of web pages that describe the 'three-ammeter' method of measuring power, so your best plan is to visit one of those sites.
What is the difference between ac ammeter and dc ammeter?
dc ammeter has three connecting pins while ac has four
What is the formula for finding digital ammeter?
There is no formula for finding anything - except perhaps the inevitable "where was it when you last saw it?"
How do you measure the resistance of a motor?
we can measure the resistance of the motor by using voltmeter ammeter method of by directly using a multimeter across the armature terminals of the motor in voltmeter ammeter method we should use a less value of dc voltage to find the resistance
Three kinds of electrical instrument?
Voltmeter, ammeter, wattmeter.
What is the three ammeter method?
I am assuming that you really want to use ammeters to measure power in a balanced 3 phase system. (hope you are not meaning 3 watt meter method) Power in Watt in a three phase system is equal to 1.73 x line voltage x line current x power factor. You need to know line voltage, power factor also in addition to current to compute the power. If the system is balanced then actually you do not need to connect ammeters in all three lines. One ammeter reading will do.
How can you connect current transformer to ammeter in three phase?
You use three CTs, one per line conductor, each feeding a separate ammeter,
How range of a ammeter is extended?
if we take resistance in parallel with ammeter then the range of ammeter will change.
What is a ammeter on Mars?
An Ammeter and a brick is a brick.
What are the parts of an ammeter?
ammeter real picture
