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6. A 20 kVA. 60 Hz, 8000/277 V transformer has the following impedances referred to the high volt...
Q1: A 20-kVA 8000/480-V distribution transformer has the following resistances and reactances: Rp...
Q1: A 20-kVA 8000/480-V distribution transformer has the following resistances and reactances: Rp 322 X,-45 Ω R,-0.05 Ω X,-0.06 Ω The excitation branch impedances are given referred to the high-voltage side of the transformer. (a) Find the equivalent circuit of this transformer referred to the high-voltage side. (b) Assume that this transformer is supplying rated load (20kVA) at 480 V and 0.8 PF lagging. What is this transformer's input voltage? What is its voltage regulation? (c) What is the transformer's...
Problem (1): A 15-KVA, 2400:240-V, 60 Hz transformer has the following equivalent circuit parameters: R =...
Problem (1): A 15-KVA, 2400:240-V, 60 Hz transformer has the following equivalent circuit parameters: R = 2.522 R2 = 0.02522 Xi = 722 X = 0.0712 Re = 32 kl Xm = 11.5 k12 If the transformer is supplying a 10-kW, 0.8 PF lagging load at rated voltage, assuming the output voltage is the reference, draw the transformer's exact equivalent circuit referred to the primary (H.V) side and use it to calculate: 1. The input current 2. The input voltage...
3.10 A 240/120 V, 4.8 kVA, 60 Hz, single-phase transformer is used to supply a 4.8...
3.10 A 240/120 V, 4.8 kVA, 60 Hz, single-phase transformer is used to supply a 4.8 kVA resistive load (i.e., the load has a power factor of 1.0) at rated voltage of 120 V a) If you assume the transformer is ideal, what would be the magni- tude of the expected primary side (240 V side) current? b) Again, if you assume the transformer is ideal, what is the apparent impedance of the load viewed from the high-voltage side of...
1) A single-phase 50-kVA, 2400/240 volt, 60 Hz distribution transformer is used as a step-down tr...
1) A single-phase 50-kVA, 2400/240 volt, 60 Hz distribution transformer is used as a step-down transformer at the load end of a 2400-volt feeder whose series impedance is (1.0+2.0) Ω. The equivalent series impedance of the transformer is (10+j25) Ω referred to the high voltage (primary) side. The transformer is delivering rated load at 0.8 power factor lagging and at rated secondary volitage. Neglect the transformer exciting curent. Using the transtormer raltings as base quantities work this problem in per...
4.41 Consider ạ 25 kVA, 240°/240 V, 60 Hz transformer with Z,-2.533 +J2.995 Ω and Z, = (2.5333 + ...
4.41 Consider ạ 25 kVA, 240°/240 V, 60 Hz transformer with Z,-2.533 +J2.995 Ω and Z, = (2.5333 + )2.995) 10-2 S2, referred to the primary and secondary sides, respectively. b) The transformer is connected at the receiving end of a feeder that has an impedance of 0.3 +j 1.8 Ω. Let the sending end-voltage magnitude of the feeder be 2400 V. Also there is a load connected to the secondary side of the transformer that draws rated current from...
3.) The equivalent low-side parameters of a 250-KVA, 4160480-V, 60 Hz transformer are Reals 0.00920 2...
3.) The equivalent low-side parameters of a 250-KVA, 4160480-V, 60 Hz transformer are Reals 0.00920 2 and Xeais 0.0433 12. The transformer is operating in the step-down mode and is delivering rated current at rated voltage to a 0.840 power-factor lagging load. Determine (a) the no- load voltage; (b) the actual input voltage at the high side; (c) the high-side current; (d) the input impedance; (e) the voltage regulation; the voltage regulation if the power factor of the load is...
Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz...
Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz A source connected to the 480-V winding supplies an impedance load con- nected to the 120-V winding. The load absorbs 15 kVA at 0.8 p.f. lagging Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz A source connected to the 480-V winding supplies an impedance load con- nected to the 120-V winding. The load absorbs 15 kVA...
A single-phase 100-kVA, 2400/240-volt, 60-Hz distribution transformer is used as a step-down transformer. The load, which...
A single-phase 100-kVA, 2400/240-volt, 60-Hz distribution transformer is used as a step-down transformer. The load, which is connected to the 240-volt secondary winding, absorbs 80 kVA at 0.8 power factor lagging and is at 230 volts. Assuming an ideal transformer, calculate the following: a) primary voltage. b) load impedance. c) load impedance referred to the primary. d) the real and reactive power supplied to the primary winding
3.4 A single-phase 100-kVA, 2400/240-volt, 60-Hz distribution transformer is used as a step-down transformer. The load,...
3.4 A single-phase 100-kVA, 2400/240-volt, 60-Hz distribution transformer is used as a step-down transformer. The load, which is connected to the 240-volt secondary wind- ing, absorbs 80 kVA at 0.8 power factor lagging and is at 230 volts. Assuming an ideal transformer, calculate the following: (a) primary voltage, (b) load impedance, (c) load impedance referred to the primary, and (d) the real and reactive power sup- plied to the primary winding.
The short-circuit test readings for a 50-kVA 2400:240-V transformer are 48 V, 20.8 A, and 617...
The short-circuit test readings for a 50-kVA 2400:240-V transformer are 48 V, 20.8 A, and 617 W, with the instruments located on the high-voltage side and the low-voltage side short- circuited. An open-circuit test with the low-voltage side energized gives instrument readings on that side of 240 V, 5.41 A, and 186 W. 1. Calculate the equivalent parameters of the transformer as referred to the high-voltage side. 2. Draw the equivalent approximate circuit of that transformer referred to the high...
Q1: A 20-kVA 8000/480-V distribution transformer has the following resistances and reactances: Rp 322 X,-45 Ω R,-0.05 Ω X,-0.06 Ω The excitation branch impedances are given referred to the high-voltage side of the transformer. (a) Find the equivalent circuit of this transformer referred to the high-voltage side. (b) Assume that this transformer is supplying rated load (20kVA) at 480 V and 0.8 PF lagging. What is this transformer's input voltage? What is its voltage regulation? (c) What is the transformer's...
Problem (1): A 15-KVA, 2400:240-V, 60 Hz transformer has the following equivalent circuit parameters: R = 2.522 R2 = 0.02522 Xi = 722 X = 0.0712 Re = 32 kl Xm = 11.5 k12 If the transformer is supplying a 10-kW, 0.8 PF lagging load at rated voltage, assuming the output voltage is the reference, draw the transformer's exact equivalent circuit referred to the primary (H.V) side and use it to calculate: 1. The input current 2. The input voltage...
3.10 A 240/120 V, 4.8 kVA, 60 Hz, single-phase transformer is used to supply a 4.8 kVA resistive load (i.e., the load has a power factor of 1.0) at rated voltage of 120 V a) If you assume the transformer is ideal, what would be the magni- tude of the expected primary side (240 V side) current? b) Again, if you assume the transformer is ideal, what is the apparent impedance of the load viewed from the high-voltage side of...
1) A single-phase 50-kVA, 2400/240 volt, 60 Hz distribution transformer is used as a step-down transformer at the load end of a 2400-volt feeder whose series impedance is (1.0+2.0) Ω. The equivalent series impedance of the transformer is (10+j25) Ω referred to the high voltage (primary) side. The transformer is delivering rated load at 0.8 power factor lagging and at rated secondary volitage. Neglect the transformer exciting curent. Using the transtormer raltings as base quantities work this problem in per...
4.41 Consider ạ 25 kVA, 240°/240 V, 60 Hz transformer with Z,-2.533 +J2.995 Ω and Z, = (2.5333 + )2.995) 10-2 S2, referred to the primary and secondary sides, respectively. b) The transformer is connected at the receiving end of a feeder that has an impedance of 0.3 +j 1.8 Ω. Let the sending end-voltage magnitude of the feeder be 2400 V. Also there is a load connected to the secondary side of the transformer that draws rated current from...
3.) The equivalent low-side parameters of a 250-KVA, 4160480-V, 60 Hz transformer are Reals 0.00920 2 and Xeais 0.0433 12. The transformer is operating in the step-down mode and is delivering rated current at rated voltage to a 0.840 power-factor lagging load. Determine (a) the no- load voltage; (b) the actual input voltage at the high side; (c) the high-side current; (d) the input impedance; (e) the voltage regulation; the voltage regulation if the power factor of the load is...
Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz A source connected to the 480-V winding supplies an impedance load con- nected to the 120-V winding. The load absorbs 15 kVA at 0.8 p.f. lagging Ideal, single-phase two-winding transformer A single-phase two-winding transformer is rated 20 kVA, 480/120 V, 60 Hz A source connected to the 480-V winding supplies an impedance load con- nected to the 120-V winding. The load absorbs 15 kVA...
A single-phase 100-kVA, 2400/240-volt, 60-Hz distribution transformer is used as a step-down transformer. The load, which is connected to the 240-volt secondary winding, absorbs 80 kVA at 0.8 power factor lagging and is at 230 volts. Assuming an ideal transformer, calculate the following: a) primary voltage. b) load impedance. c) load impedance referred to the primary. d) the real and reactive power supplied to the primary winding
The short-circuit test readings for a 50-kVA 2400:240-V transformer are 48 V, 20.8 A, and 617 W, with the instruments located on the high-voltage side and the low-voltage side short- circuited. An open-circuit test with the low-voltage side energized gives instrument readings on that side of 240 V, 5.41 A, and 186 W. 1. Calculate the equivalent parameters of the transformer as referred to the high-voltage side. 2. Draw the equivalent approximate circuit of that transformer referred to the high...
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