Question: A transformer has the following nameplate data: 138/13.8 kV 12/16/20 MVA Reactance = 5.42% This transformer will be connected to a 138 kV source to

A transformer has the following nameplate data:

138/13.8 kV

12/16/20 MVA

Reactance = 5.42%

This transformer will be connected to a 138 kV source to supply a 13.8 kV bus. Calculate the per-unit impedance of this transformer using a 10 MVA base.

Step by Step Solution

★★★★★

3.29 Rating (152 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

To calculate the perunit impedance of the transformer on a different base we need to first determine ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Electrical Engineering Questions!

A 7970-V: 120-V, 60-Hz potential transformer has the following parameters as seen from the high-voltage (primary) winding: X1 = 1721 X2 = 1897 Xm = 782k , R1 = 1378 R2 = 1602 a. Assuming that the...

A 200-A: 5-A, 60-Hz current transformer has the following parameters as seen from the 200-A (primary) winding: X1 = 745 X2 = 813 Xm = 307m R1 = 136 R2 = 128 a. Assuming a current of 200 A in the...

A coil with impedance 8 + j6 is connected in series with a capacitive reactance X. The series combination is connected in parallel with a resistor R. Given that the equivalent impedance of the...

Calculate the principol_voke_ of (1+i) Find all volues of Zog (-2+21)

7. A single-phase, 300-kVA 11/2.2 kV, 60 Hz power transformer has the following parameters referred to the high-voltage side: RC,HV = 20.0 kn XM,HV = 8.10 kn Req,HV = 2.60 Xeq,HV = 8.15 0 a) Find the...

65% of Fisher accounting students earn a B grade or higher in their core. If 1000 students are in accounting this semester, what is the probability that more than 68% receive a grade of B or higher?

For the distribution substation given in Problem 14.9, assume that each of the four circuit breakers on the $12.5-\mathrm{kV}$ side of the distribution substation transformers has a maximum...

As shown in Figure 14.24, an urban distribution substation has one 30-MVA (FOA) and three 33.3 MVA (FOA), $138 \mathrm{kV} \Delta / 12.5 \mathrm{kV}$ Y transformers denoted TR1-TR4, which feed...

The motors $M_{1}$ and $M_{2}$ of Problem 3.45 have inputs of 120 and $60 \mathrm{MW}$, respectively, at $13.2 \mathrm{kV}$, and both operate at unity power factor. Determine the generator...

Thermal Rising, Incorporated, makes paragliders for sale through specialty sporting goods stores. The company has a standard paraglider model, but also makes custom-designed paragliders. Management...

Describe the various methods for establishing ethical standards. Which is most meaningful to you? Explain.

Determine the molar solubility of Fe(OH) 2 in purewater. K sp for Fe(OH) 2 )= 4.87 10 -17 .

At December 31,2017, Hawke Company reports the following results for its calendar year. rting $1,905,000 Cash sales 5.682,000 Credit sales. In addition, its unadjusted trial balance includes the...

2. Determine the density of a copper specimen with a dislocation density of 108 mm 2 given that density of a copper specimen with a dislocation density of 10 mm2 is 8.920 g/cm3. (Radius of Cu atom is...

Plot the asymptotic Bode diagram for the PID controller G(s) = Kc(1+ d +1/ i s) where Kc = 10, I = 1, and D = 100. Label corner frequencies and give slopes of asymptotes.

O GASES Using the ideal equation of state A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas reaction vessel. The vessel is a stainless-steel cylinder...

In an attempt to communicate to the CEO the importance of leadership in your role in creating a more innovative entrepreneurial organization, you have decided to provide your CEO with a short white...

the answer 13. Choose the best answer. A number in a matrix is called a(n) O element transpose O dimension O columns

the impedence values in question 4 is j0.25 and the reactance is 0.5 10 10 6 1. For the system data given below draw the single line diagram. Represent the power, voltage and impedances in per units...

Compute the $4 \times 4$ per-unit zero-, positive-, and negative-sequence bus impedance matrices for the power system given in Problem 9.5. Use a base of 1000 MVA and $20 \mathrm{kV}$ in the zone...

NEED HELP FILLING IN THE TABLES. SHOW PROCESS PLEASE. WIILL UPVOTE & THANKS IN ADVANCED System Description and Data. This case consists of 9 buses and is representative of a medium-sized industrial...

Figure Qu. 1 below shows a simple Single Line Diagram (SLD) for a power system where a Utility supplies a 66 kV Customer. - 13.8 kV The 'PG Bus' is a 13.8 kV Power Generation Bus, to which Generators...

Repeat Problems 9.1 and 9.14 including $\Delta-Y$ transformer phase shifts. Assume American standard phase shift. Also calculate the sequence components and phase components of the contribution to...

Faults at bus $n$ in Problem 9.1 are of interest (the instructor selects $n=1$, 2, or 3). Determine the Thvenin equivalent of each sequence network as viewed from the fault bus. Prefault voltage...