Question

A 20 kVA single phase transformer 4800/480V has primary resistance and reactance of 5Ω and 15Ω...

A 20 kVA single phase transformer 4800/480V has primary resistance and reactance of 5Ω and 15Ω respectively, while the resistance and reactance of secondary winding is 0.1Ω and 0.15 Ω respectively. Calculate:

(i) The parameter referred to primary side of transformer and draw the equivalent circuit

(ii) The approximate value of secondary voltage at full load power factor of 0.8 lagging if 4.8kV primary supply

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
consider a 10KVA,2300 V/460 V , single phas transformer. The primary winding resistance and reactence of...
consider a 10KVA,2300 V/460 V , single phas transformer. The primary winding resistance and reactence of this transformer is 5 ohm and 15 ohm respectively. the secondary winding resistance and reactance of this transformer is 0.5 ohm and 0.25 respectively. when the primary supply voltage is 2300V, detrmine: a) the equivalent resistance referred to primary (Re). b) the equivalent leakage reactance referred primary(Xe). c)the equivalent impedance referred to primary(Ze). d)the percentage voltage regulation for 0.6 lagging power factor.
A 250/125 V, 5 kVA single phase transformer has primary resistance of 0.2 ohm and reactance...
A 250/125 V, 5 kVA single phase transformer has primary resistance of 0.2 ohm and reactance of o.75 ohm. The secondary resistance is 0.05 ohm and reactance of o.2 ohm. Determine its regulation while supplying full load on 0.8 leading pf
A 2.2 KVA, 440---220 V, 60 Hz, step-down transformer has the following parameters: Rp= 3.0 Ω,...
A 2.2 KVA, 440---220 V, 60 Hz, step-down transformer has the following parameters: Rp= 3.0 Ω, Xp= 4.0 Ω, Rs= 2.5 Ω, Xs= 2.0 Ω, Rc= 60 KΩ, and Xm = 15 KΩ. The transformer is operating at full load with a power factor of 0.707 lagging. The magnetizing branch impedance can be ignored. a) Draw the transformer’s equivalent T-circuit, b) Find the equivalent winding impedance referred to the high side, c) Calculate the primary and secondary currents, d) Determine...
A 10-kVA, 250 / 100-V, 50-Hz single-phase transformer gave the following open and short circuit test...
A 10-kVA, 250 / 100-V, 50-Hz single-phase transformer gave the following open and short circuit test results: Open circuit test: 250 V, 2.6 A, power factor: 0.3 on HV side. Short circuit test: 18 V, 80 A, input power: 240 W on HV side. Calculate the following: 4.1 The equivalent circuit parameters of the transformer. (6) 4.2 The efficiency at full load unity power factor. (NB the test current is not at full load) (6) 4.3 The load at which...
A 42 kVA three-phase synchronous generator with line voltage 4.16 kV at a frequency of 60...
A 42 kVA three-phase synchronous generator with line voltage 4.16 kV at a frequency of 60 Hz, is connected in star configuration. The generator has a winding whose armature resistance is 0.8 Ω and a synchronous reactance of 7.4 Ω, both per phase. Determine the voltage regulation when the power factor is 0.600 lagging.
A 1200 kVA, 2.3 kV, 3-phase, star - connected alternator has a resistance of 0.401 /phase...
A 1200 kVA, 2.3 kV, 3-phase, star - connected alternator has a resistance of 0.401 /phase and a synchronous reactance of 3.21 /phase. If the generator is supplying a load at a power factor of 0.8 lagging and at rated KVA, calculate the change in line voltage at the output terminals of the generator if the load is suddenly disconnected. Assume the speed and the excitation current is to remain unchanged.
A single phase transformer rated at 3000 KVA, 69kV, 60 Hz has a total internal impedance...
A single phase transformer rated at 3000 KVA, 69kV, 60 Hz has a total internal impedance Zp of 127ohm, referred to the primary side. Calculate: a) primary and secondary currents b) voltage regulation from no load to full load for 2000 kW resistive load, knowing that the primary voltage supply is fixed at 69 kV. c) primary and secondary currents if the secondary is accidentally short circuited.
A single-phase transformer has 2400 turns on the primary and 600 turns on the secondary. Its...
A single-phase transformer has 2400 turns on the primary and 600 turns on the secondary. Its no-load current is 4A at a power factor of 0.25 lagging. Assuming the volt drop in the windings is negligible, calculate the primary current and power factor when the secondary current is 80A at a power factor of 0.8 lagging.
. A 230/460-V transformer has a primary resistance of 0.2 Ohms and a resistance of 0.5...
. A 230/460-V transformer has a primary resistance of 0.2 Ohms and a resistance of 0.5 Ohms and the corresponding values for the secondary are 0.75Ohms and 1.8 Ohms respectively. Find secondary terminal voltage When supplying (a) 10A at 0.8 power factor lagging (b) 10A at p.f, 0.8 leading.
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...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT