When a voltage higher than the rated voltage is applied to a transformer primary, a voltage...
When a voltage higher than the rated voltage is applied to a transformer primary, a voltage ___ than the rated secondary voltage will be delivered to a load.
A. Higher
B. Lower
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When a voltage higher than the rated voltage is applied to a
transformer primary, a voltage...
7. A transformer is rated at 75kVA, with a primary voltage of 32kV. When tested under...
7. A transformer is rated at 75kVA, with a primary voltage of 32kV. When tested under "Full Load" condition, its copper loss is 870W and core loss is 320W. If an industrial load rated at 1500V with a pf = 0.76 is connected to the secondary, determine: a) The transformation ratio. b) Total power loss at "one-third load". c) Efficiency of the transformer at "one-third load". d) Primary and secondary currents at "one-third load".
a single phase transformer is rated for 0.5kVa, a primary voltage of 480V, and a secondary...
a single phase transformer is rated for 0.5kVa, a primary voltage of 480V, and a secondary voltage of 120V. what is the maximum full load that can be supplied by the secondary?
Problem 1: A three-phase transformer has the following name plate data: Rated Power Primary voltage Secondary...
Problem 1: A three-phase transformer has the following name plate data: Rated Power Primary voltage Secondary Voltage Excitation reactance Series Impedance 150 MVA 230 kV 32 kV 30 (pu) 0.02+0.15j (pu) The transformer is Y/A connected. Answer the following questions: a) What are the nominal (rated) primary and secondary line currents?| b) What is the nominal value of the Delta-side winding (internal) current? c) What is the secondary to primary winding turn ratio? d) The transformer is supplying 150 MVA...
A single-phase transformer is rated at 10 kVA, 240/100 V. When the secondary terminals are open-circuited...
A single-phase transformer is rated at 10 kVA, 240/100 V. When the secondary terminals are open-circuited and the primary winding is supplied at normal voltage, the input current is 2.6 A at a power factor of 0.3 lag. When the secondary terminals are short-circuited, a voltage of 18 V applied to the primary causes the full-load current to flow in the secondary, the power input to the primary being 240 W. Calculate (a) the regulation (b) the efficiency of the...
Q/&&&A transformer rated at primary voltage 4800 volts and a secondary voltage of 240 volte what...
Q/&&&A transformer rated at primary voltage 4800 volts and a secondary voltage of 240 volte what is the turn's ratio and Primary and secondary current
1. A step down transformer with a turns ratio of 6 to 1 has 120V applied...
1. A step down transformer with a turns ratio of 6 to 1 has 120V applied to its primary coil. A 25Ω load resistor is connected to the secondary coil. Calculate the following (3+2+2 -7 Points) Secondary coil voltage Secondary coil current Primary coil current a. b. c. 2. A step up transformer has a primary coil current of 1SA and an applied voltage of 220V. The secondary coil current is 5A. Calculate the following (3+3+2+2-10 Points) Secondary coil voltage...
1. If 480 volts is applied to the primary winding of a transformer which has 300...
1. If 480 volts is applied to the primary winding of a transformer which has 300 turns in the primary winding and 15 turns in the secondary winding, the secondary voltage will be A. 0.0417 volts. C. 56.8 volts B. 24 volts. D. 9600 volts. 2. A distribution transformer with a grain-orientented steel core is highly efficent because its A. exciting current is sufficiently high. B. flux direction is parallel to the stell-rolling direction C. permeability is increased due to...
If 110 V rms is applied to the primary of an ideal transformer with a turns...
If 110 V rms is applied to the primary of an ideal
transformer with a turns ratio of 500:1, what is the RMS voltage
output from the secondary? What is the peak voltage outpyt from the
secondary?
a. If 110 VAMS is applied to the primary of an ideal at is transformer with a turns ratio of 500:1, wh the RMS voltage output from the secondary? What is the peak voltage output from the secondary?
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...
The S.C. test on a 1-phase transformer, with the primary winding short-circuited and 30 V applied...
The S.C. test on a 1-phase transformer, with the primary winding short-circuited and 30 V applied to the secondary gave a wattmeter reading of 60 W and secondary current of 10 A. II the normal applied primary voltage is 200 V, the transformation ratio 1:2 and the full-load secondary current 10 A, calculate the secondary p.d. at full-load current for (a) unity power factor (b) power factor 0.8 lagging. these are the answers [ 394 V; 377.6 V ]
7. A transformer is rated at 75kVA, with a primary voltage of 32kV. When tested under "Full Load" condition, its copper loss is 870W and core loss is 320W. If an industrial load rated at 1500V with a pf = 0.76 is connected to the secondary, determine: a) The transformation ratio. b) Total power loss at "one-third load". c) Efficiency of the transformer at "one-third load". d) Primary and secondary currents at "one-third load".
Problem 1: A three-phase transformer has the following name plate data: Rated Power Primary voltage Secondary Voltage Excitation reactance Series Impedance 150 MVA 230 kV 32 kV 30 (pu) 0.02+0.15j (pu) The transformer is Y/A connected. Answer the following questions: a) What are the nominal (rated) primary and secondary line currents?| b) What is the nominal value of the Delta-side winding (internal) current? c) What is the secondary to primary winding turn ratio? d) The transformer is supplying 150 MVA...
A single-phase transformer is rated at 10 kVA, 240/100 V. When the secondary terminals are open-circuited and the primary winding is supplied at normal voltage, the input current is 2.6 A at a power factor of 0.3 lag. When the secondary terminals are short-circuited, a voltage of 18 V applied to the primary causes the full-load current to flow in the secondary, the power input to the primary being 240 W. Calculate (a) the regulation (b) the efficiency of the...
Q/&&&A transformer rated at primary voltage 4800 volts and a secondary voltage of 240 volte what is the turn's ratio and Primary and secondary current
1. A step down transformer with a turns ratio of 6 to 1 has 120V applied to its primary coil. A 25Ω load resistor is connected to the secondary coil. Calculate the following (3+2+2 -7 Points) Secondary coil voltage Secondary coil current Primary coil current a. b. c. 2. A step up transformer has a primary coil current of 1SA and an applied voltage of 220V. The secondary coil current is 5A. Calculate the following (3+3+2+2-10 Points) Secondary coil voltage...
If 110 V rms is applied to the primary of an ideal
transformer with a turns ratio of 500:1, what is the RMS voltage
output from the secondary? What is the peak voltage outpyt from the
secondary?
a. If 110 VAMS is applied to the primary of an ideal at is transformer with a turns ratio of 500:1, wh the RMS voltage output from the secondary? What is the peak voltage output from the secondary?
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...
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