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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.
Wiki User
∙ 13y ago
Wiki User
∙ 10y agoThe x resistance of a transformer is calculated by measuring the current flow on either side of the transformer. The difference between the two sides will determine the amount of resistance inside.
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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?
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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 .
Formula for calculating the area of sphere?
Formula for calculating the area of sphere is : 4 * pi * r * r
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
Where you r not apply ohms law?
in transformer
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They are called I squared R losses. That is the formula for calculating power (P) in watts. P=I^2*R. I equals current in amps. R equals resistance in ohms. Also if the voltage (E) is known the formula is P=E^2/R. The current of electrons meets the resistance of the coil wire. That results in heat in inductor and transformer coils.
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.
What is the relationship between radius ratio and coordination number in crystal packing?
r+ / r- that is the ratio of radii + charge to -charge gives a ratio this ratio is used to determine the CN the table is given a lot of books
