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To calculate X/R, you must know what X and R are, then simply divide. The transformer test report should provide this information, and if not, there are ANSII standard values that can be used as estimates.
The X value, or the % impedance are usually given explicitly in the test report (sometimes both, but not always). The R value may be given as load loss at the base MVA rating. To find % R, take the load loss (in watts or kilowatts), and divide by the base MVA.
The % impedance is = %R + j%X, so you may need to do some (vector) math to get %X if not explicitly given.
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Where you r not apply ohms law?
in transformer
What is x r ratio?
x/r ratio is reactance/resistance where reactance is impedance * frequency (60 hz)
What formula calculates the current drawn by the transformer for mains electricity?
p=r*i
Where can someone purchase Transformer figurines?
Transformer figurines can be purchased at many retailers. Online Transformer figurines can be purchased at Amazon, Toys 'R' Us, eBay, Craigslist, Toy Wiz and others. In local markets, Transformer figurines can be purchased at Walmart, K-Mart, Toys 'R' Us, Target and comic book stores.
Where are some places the Transformer game can be purchased at?
Transformer video games can be purchased at Game, HMV, Argos, WHSmith and most large supermarkets. Transformer Lego sets can be purchased again at most supermarkets, Argos, toys shops like Toys R' Us and The Entertainer, and Amazon.
What r the primary to secondary turns ratio in the isolation transformer?
a: 1:1 ratio its only purpose is to isolate
What is distribution transformer?
Distribution transformers change the feeder voltage to utilization voltage required by the consumer. they are essentially step down transformer which changes the voltage to standard service voltage. their rating is about 200KVA. since these transformers are operated throughout a day, eventhough they r not carrying load r not, it should hav a good ALL DAY EFFICIENCY .
When calculating subcooling with R-407C?
4 * pi * r * r15 Fby subcooling20The formula for calculating the area of a circle - is Pi x r x r
Formula for calculating the area of sphere?
The formula for calculating the surface area of a sphere is 4πr², where r is the radius of the sphere. This formula represents the area covered by the curved surface of the sphere.
Where you r not apply ohms law?
in transformer
What is the area in cm2 of a circle?
The formula for calculating the area of a circle - is Pi x r x r... where r is the radius.
What is c 2 pi r use?
C = 2∏r is the formula for calculating the circumference of a circle
What is the formula for calculating a cylinder's surface area?
A = 2 x pi x r (r + h)
What is x r ratio?
x/r ratio is reactance/resistance where reactance is impedance * frequency (60 hz)
What is impedance of transformer?
The transformer impedance is the amount of voltage applied for transformer during the load test.Answer.I really don't agree with the answer given by the previous user.Impedance is the total vector opposition offered by the transformer to the flow of current i.e the vector sum of its pure resistance (R) and it's inductive reactance (XL). http://en.wikipedia.org/wiki/Electrical_impedanceAnother AnswerThe 'impedance' of a transformer is usually expressed as a 'percentage impedance', which is defined (perhaps rather confusingly!) as the ratio of the primary voltage that will result in the full rated current flowing through the secondary, to the rated primary voltage.
How do you simplify ratio if Sam earns R 12 Ron earns R 15 what is the ratio of Ron's salary to sam's in simplified form?
the simplified ratio is 4:5
What is the formula for calculating development surface are of truncated cone?
The formula for calculating development surface area of a truncated cone is Avr = π [s (R + r) + R^2 + r^2]. The solution is area (A) subscript r where r is the radius of the top of the truncated cone. In this formula R stands for the radius of the bottom of the cone and s represents the slant height of the cone.
