Question

The line voltage applied to the primary side of a 1MVA 3Φ 33/11kV transformer with a...

The line voltage applied to the primary side of a 1MVA 3Φ 33/11kV transformer with a 3Φ short circuit applied to the 11kV side equals 1625 V. The line current for this short circuit test equals 17.25 A. The impedance in per unit values ∣Z1MVA transformer∣ is:

  1. 0.45 pu
  2. 0.05 pu
  3. 0.55 pu
  4. 0.60 pu
Engineering   Electrical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A feeder having an impedance of 1.0+j3.2ohms is connected to the primary side of a step-down...
A feeder having an impedance of 1.0+j3.2ohms is connected to the primary side of a step-down three phase transformer rated at 132:22KV, 200MVA and that has a series reactance of 0.14pu. The transformer supplies a load of 190MVA with a 0.90 lagging power factor at rated voltage. a) Caculate the per unit impedance of the feeder and the per unit load current. Use the transformer ratings as base values. b) Calculate the voltage at the sending end of the feeder...
Problem 2. A three phase transformer rated at 5 MVA, 115/13.2 kV has a per phase...
Problem 2. A three phase transformer rated at 5 MVA, 115/13.2 kV has a per phase series impedance of 0.007 + j0.075 per unit (shunt parameters are ignored). The low voltage side is connected to a short distribution line which modeled by a series per phase impedance of 0.02 +j0.1 per unit on the base of 10 MVA. The line supplies a balanced three phase constant impedance load at 4 MVA, 13.2 kV with power factor of 0.85 lagging •...
A transformer has a primary-to-secondary turns ratio of 100:1. The voltage on the primary side is...
A transformer has a primary-to-secondary turns ratio of 100:1. The voltage on the primary side is 27.7 kv.a.c. at 60.0 Hz ( assume 60.0 Hz when treating electric power topics). A load is connected across the secondary winding. Assume that the transformer is ideal. (a) Suppose that the electric utility supplied 27.7 kv.d.c. rather than 27.7 kv.a.c. How much power would the transformer’s secondary winding deliver to the load in this case? (b). The transformer’s primary winding is supplied by...
Determine the transformer equivalent circuit components referred to the LV side and sketch the equivalent circuit....
Determine the transformer equivalent circuit components referred to the LV side and sketch the equivalent circuit. Calculate the transformer voltage regulation at full load with load power factor of 0.9 lagging. Below is the test result which can be used to determine the value of the components for the equivalent circuit. Power of the transformer = 1 kVA Open circuit test: LV winding Voltage = 110 V LV side ammeter = 690 mA LV side wattmeter = 18 W HV...
2(a). A transformer has a primary-to-secondary turns ratio of 100:1. The voltage on the primary side...
2(a). A transformer has a primary-to-secondary turns ratio of 100:1. The voltage on the primary side is 27.7 kv.a.c. at 60.0 Hz ( assume 60.0 Hz when treating electric power topics). A load is connected across the secondary winding. Assuming that the transformer is ideal, what voltage is developed to the load? Briefly show your work. Sketch a diagram. 2(b). The load of part a is a 2.00-ohm load. How much current does the load draw from the transformer’s secondary...
a) A three phase transformer rated at 30 MVA 10 kV(Δ)/1 kV(Y) is supplying a load...
a) A three phase transformer rated at 30 MVA 10 kV(Δ)/1 kV(Y) is supplying a load at the low voltage side. The load absorbs 5 MVA, 0.7 power factor lagging at line to line voltage 0.9 kV. The transformer has an equivalent reactance 0.05 Ω/phase. Assuming 10 MVA and 1 kV as base value, draw the per unit diagram for the system. Find the Line to Line voltage at the primary side of the transformer. b) A three-phase synchronous generator...
A 100 MVA, 13.2 kV three phase generator (G) having a synchronous reactance of 10% is...
A 100 MVA, 13.2 kV three phase generator (G) having a synchronous reactance of 10% is connected to a three phase Y-Y transformer T1 which feeds a 132 kV 10 miles transmission line having an impedance per phase of 2 + j5 ?/mile. At the receiving end of the transmission line is a Y-Y step down transformer T2. Three loads are connected to the secondary side of the transformer T2. Loads are as follows: Load#1 40 MVA at 0.8 pf...
An AC adapter for a telephone answering machine uses a transformer to reduce the line voltage...
An AC adapter for a telephone answering machine uses a transformer to reduce the line voltage of 120 V to a voltage of 4.00 V. The RMS current delivered to the answering machine is 350 mA. If the primary (input) coil of the transformer has 720 turns, then how many turns are there on the secondary (output) coil? What is the power drawn from the electric outlet, if the transformer is assumed to be ideal? What is the power drawn...
An AC adapter for a telephone answering machine uses a transformer to reduce the line voltage...
An AC adapter for a telephone answering machine uses a transformer to reduce the line voltage of 120 V to a voltage of 4.00 V. The RMS current delivered to the answering machine is 660 mA. If the primary (input) coil of the transformer has 600 turns, then how many turns are there on the secondary (output) coil? What is the power drawn from the electric outlet, if the transformer is assumed to be ideal? What is the power drawn...
An AC adapter for a telephone answering machine uses a transformer to reduce the line voltage...
An AC adapter for a telephone answering machine uses a transformer to reduce the line voltage of 120 V to a voltage of 5.00 V. The RMS current delivered to the answering machine is 470 mA. If the primary (input) coil of the transformer has 600 turns, then how many turns are there on the secondary (output) coil? What is the power drawn from the electric outlet, if the transformer is assumed to be ideal? What is the power drawn...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT