The equivalent resistance and equivalent reactance (high side) for a 35.8-kVA, 5800--900-V,50-Hz transformer are 2.5 Ohms...
The equivalent resistance and equivalent reactance (high side) for a 35.8-kVA, 5800--900-V,50-Hz transformer are 2.5 Ohms and 6.4 Ohms, respectively. If a load impedance of 12 cis 16 Ohms is connected to the low side, determine the voltage across the load.
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The equivalent resistance and equivalent reactance (high side)
for a 35.8-kVA, 5800--900-V,50-Hz transformer are 2.5 Ohms...
A 50-kVA, 13,800/208-V, Delta to Wye connected distribution transformer has an equivalent resistance of 3 percent...
A 50-kVA, 13,800/208-V, Delta to Wye connected
distribution transformer has an equivalent resistance of 3 percent
and a reactance of 9 percent per unit.
(a) what's the transformers phase impedance referred to the high
side voltage?
(b) what's the transformers voltage regulation at full load and 0.9
PF leading?
equivalent resistance of 3 percent and a reactance of 9 percent per unit. (a) What is the transformer's phase impedance referred to the high-voltage side? (b) Calculate this transformer's voltage regulation...
6. A 20 kVA. 60 Hz, 8000/277 V transformer has the following impedances referred to the high volt...
6. A 20 kVA. 60 Hz, 8000/277 V transformer has the following impedances referred to the high voltage side: Req-320, xe,-45Ω,R.-250kQ,Xm-30kQ. A) Calculate the voltage across rated load impedance with PF= 0.707 lagging when the transformer is connected to rated input voltage. B) Draw the phasor diagram showing the load voltage and current, voltage drop across the series impedance and voltage at the low voltage side of the ideal transformer, C) Calculate the efficiency of the transformer D) What adjustments...
4. [Transformer - 15 points) A 50-kVA, 13,800/208-V, A-Y distribution transformer has an equivalent resistance of...
4. [Transformer - 15 points) A 50-kVA, 13,800/208-V, A-Y distribution transformer has an equivalent resistance of 3 percent and a reactance of 9 percent per unit. (a) What is the transformer's phase impedance referred to the high-voltage side? (b) Calculate this transformer's voltage regulation at full load and 0.9 PF leading.
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...
Al. A 1 kVA single-phase step-down transformer is connected to a 220 V, 50 Hz A.C....
Al. A 1 kVA single-phase step-down transformer is connected to a 220 V, 50 Hz A.C. source and delivers power to a load. The winding resistance and reactance at secondary side are 0.02 2 and 0.1 12 respectively. The maximum value of core flux is 0.248 mWb and the secondary winding contains 1000 turns. Evaluate a. b. the voltage induced on the secondary side; the turn ratio of primary side to secondary side; the rated current on both sides; and...
A single-phase 50-kVA, 2400/240-volt, 60-Hz distribution transformer has a 1-ohm equivalent leakage reactance and a 5000-ohm...
A single-phase 50-kVA, 2400/240-volt, 60-Hz distribution transformer has a 1-ohm equivalent leakage reactance and a 5000-ohm magnetizing reactance referred to the high-voltage side. If rated voltage is applied to the high-voltage winding, calculate the open-circuit secondary voltage. Neglect 'R and G^V losses. Assume equal series leakage reactances for the primary and the referred secondary
4. The figure below shows the equivalent circuit of a 2400/240-V, 60-Hz transformer. The high-side leakage...
4. The figure below shows the equivalent circuit of a 2400/240-V, 60-Hz transformer. The high-side leakage impedance is (1.2+j 2.0) 2. the low-side leakage impedance is (0.012 ti 0.02) S2, and Xm at the high-side is 1800 2. Neglect the Hysteresis and Eddy current loss resistance Rhe Calculate the input voltage if the output voltage is 240 V (rms). Given the load resistance is 1.5 12 and the power factor is 0.8 (lagging). ཉིས་པ་དེ། དེ་ | ༼ ། ༼། །
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...
A 75-kVA, 4900-250-V,50-Hz, single-phase transformer has the following parameters expressed in ohms: RLS = 0.005 ...
A 75-kVA, 4900-250-V,50-Hz, single-phase transformer has the following parameters expressed in ohms: RLS = 0.005 RHS = 2.477 RfeHS = 44,167 XLS = 0.0115 XHS = 4.8419 XMHS = 7,798.2 The transformer is operating in the step-down mode, delivering 70 % of the rated load at rated voltage and 0.98 p.f. lagging. Determine the magnitude of the input impedance of the combined transformer and load in Ohms.
Q6. A 50 Hz, 25 kVA 7200/240 V transformer has the following equivalent circuit parameters: Prima...
Please show full working
Q6. A 50 Hz, 25 kVA 7200/240 V transformer has the following equivalent circuit parameters: Primary resistance-1562, secondary resistance-0.02 Ω Primary leakage reactance-140Q, Secondary leakage reactance-0.15Q, Magnetising reactance 30 k2, Core loss resistance 200 k2 (a) The transformer is connected to two loads in parallel. The first load is 10 kW at 0.866 power factor lagging and the second load is 15kVA with a power factor of 0.8 lagging. Find the percentage regulation and power efficiency...
A 50-kVA, 13,800/208-V, Delta to Wye connected
distribution transformer has an equivalent resistance of 3 percent
and a reactance of 9 percent per unit.
(a) what's the transformers phase impedance referred to the high
side voltage?
(b) what's the transformers voltage regulation at full load and 0.9
PF leading?
equivalent resistance of 3 percent and a reactance of 9 percent per unit. (a) What is the transformer's phase impedance referred to the high-voltage side? (b) Calculate this transformer's voltage regulation...
6. A 20 kVA. 60 Hz, 8000/277 V transformer has the following impedances referred to the high voltage side: Req-320, xe,-45Ω,R.-250kQ,Xm-30kQ. A) Calculate the voltage across rated load impedance with PF= 0.707 lagging when the transformer is connected to rated input voltage. B) Draw the phasor diagram showing the load voltage and current, voltage drop across the series impedance and voltage at the low voltage side of the ideal transformer, C) Calculate the efficiency of the transformer D) What adjustments...
4. [Transformer - 15 points) A 50-kVA, 13,800/208-V, A-Y distribution transformer has an equivalent resistance of 3 percent and a reactance of 9 percent per unit. (a) What is the transformer's phase impedance referred to the high-voltage side? (b) Calculate this transformer's voltage regulation at full load and 0.9 PF leading.
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...
Al. A 1 kVA single-phase step-down transformer is connected to a 220 V, 50 Hz A.C. source and delivers power to a load. The winding resistance and reactance at secondary side are 0.02 2 and 0.1 12 respectively. The maximum value of core flux is 0.248 mWb and the secondary winding contains 1000 turns. Evaluate a. b. the voltage induced on the secondary side; the turn ratio of primary side to secondary side; the rated current on both sides; and...
A single-phase 50-kVA, 2400/240-volt, 60-Hz distribution transformer has a 1-ohm equivalent leakage reactance and a 5000-ohm magnetizing reactance referred to the high-voltage side. If rated voltage is applied to the high-voltage winding, calculate the open-circuit secondary voltage. Neglect 'R and G^V losses. Assume equal series leakage reactances for the primary and the referred secondary
4. The figure below shows the equivalent circuit of a 2400/240-V, 60-Hz transformer. The high-side leakage impedance is (1.2+j 2.0) 2. the low-side leakage impedance is (0.012 ti 0.02) S2, and Xm at the high-side is 1800 2. Neglect the Hysteresis and Eddy current loss resistance Rhe Calculate the input voltage if the output voltage is 240 V (rms). Given the load resistance is 1.5 12 and the power factor is 0.8 (lagging). ཉིས་པ་དེ། དེ་ | ༼ ། ༼། །
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...
Please show full working
Q6. A 50 Hz, 25 kVA 7200/240 V transformer has the following equivalent circuit parameters: Primary resistance-1562, secondary resistance-0.02 Ω Primary leakage reactance-140Q, Secondary leakage reactance-0.15Q, Magnetising reactance 30 k2, Core loss resistance 200 k2 (a) The transformer is connected to two loads in parallel. The first load is 10 kW at 0.866 power factor lagging and the second load is 15kVA with a power factor of 0.8 lagging. Find the percentage regulation and power efficiency...
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