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ated for 240 volts primary. There are two secondary windings; #1 is 24 volts at 100...
1 pts The primary coil of a transformer has 100 loops and is connected to a...
1 pts The primary coil of a transformer has 100 loops and is connected to a circuit with 120 volts (primary voltage). What is the output voltage (secondary voltage) if the secondary coil has 50 loops? 60 volts O 240 volts O 100 volts O 50 volts 1 pts Question 18 Question 18 1 pts If the current in the primary coil of the above problem is 2 amps, what is the output current (current in secondary coil)?SEP o 1...
A transformer has a primary rating of 480 volts and supplies 240 volts to a 7.4...
A transformer has a primary rating of 480 volts and supplies 240 volts to a 7.4 kVA load. The circuit that is connected to the primary originates from a 2-pole circuit breaker in a 277/480-volt 3 phase, 4-wire panelboard. The current measured in one of the circuit conductors connected to the breakers is 15.9 amps. The efficiency of this transformer is ___%
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...
1. (10 PT) A three-phase bridge rectifier circuit shown in the figure phase voltage of 220 volts rms. A load of 100 Ω is connected across is supplied by a rectifier. Both the primary and secondary...
1. (10 PT) A three-phase bridge rectifier circuit shown in the figure phase voltage of 220 volts rms. A load of 100 Ω is connected across is supplied by a rectifier. Both the primary and secondary windings of transfor Assume the transformer has a turns ratio of unity mer are Y-connected a) 3 PTI On the top of voltage plot on next page indicate the diodes that will be conducting during different intervals of time. b) 17 PT] Plot the...
Given: 100kVA single phase transformer, Z=1.5% Primary: 480V 2 wire Secondary: 120/240V 3 wire Install the...
Given: 100kVA single phase transformer, Z=1.5% Primary: 480V 2 wire Secondary: 120/240V 3 wire Install the above transformer to serve a branch circuit panelboard. The panelboard will be located 10' from the transformer. The primary side raceway is PVC and the secondary raceway is EMT. All calculations will conform to applicable NEC regulations. The primary side, overcurrent protection device, will be chosen based on the next available standard size of the full load amps of the transformer. The secondary side,...
Part A: A transformer with turns ratio (primary/secondary) of 18:1 is used to step down the...
Part A: A transformer with turns ratio (primary/secondary) of 18:1 is used to step down the voltage from a 120 V wall socket to be used in a battery charger. What is the voltage supplied to the recharger? Part B: The electric motor in a toy train requires a voltage of 9.0 V. Find the ratio of turns on the primary coil to the turns on the secondary coil in a transformer that will step the 120-V household voltage down...
2. Figure 5 depicts how power is distributed from the power company to their customers through...
2. Figure 5 depicts how power is distributed from the power company to their customers through a combination of two transformers and a transmission line The transmission line is shown to have a resistance equal to 22. N, and N2 represent the number of turns on the primary or the secondary of the two transformers. İp is the current provided by the power company iis the current through the transmission line The power company provides 120v, 60 Hz to the...
transformers
Learning Goal: To understand the concepts explaining the operation of transformers.One of the advantages of alternating current (ac) over direct current (dc) is the ease with which voltage levels can be increased or decreased. Such a need is alwayspresent due to the practical requirements of energy distribution. On the one hand, the voltage supplied to the end users must be reasonably low for safety reasons(depending on the country, that voltage may be 110 volts, 220 volts, or some other value...
11. An electrical system that's not grounded and is between 120 and 1000 volts must include...
11. An electrical system that's not grounded and is between 120 and 1000 volts must include the use of A. ground isolators. OB. equipotential barriers. C. ground detectors. OD. arc suppression. 12. Imagine that you're installing a feeder in a hospital that will terminate in five branch circuits in patient care areas. To make the feeder legal for this purpose in this area, you must O A. run two wire conductor EGCS. OB. use enhanced bonding practices on the feeder's...
Problem 1: The secondary winding of a transformer has a terminal voltage of v, (t) 282.8...
Problem 1: The secondary winding of a transformer has a terminal voltage of v, (t) 282.8 sin 377t V. The turns ratio of the transformer is 100:200 (a0.50) The impedances of this transformer referred to the primary side are The equivalent circuit is shown below lf (a) If the secondary current of the transformer is i,()-7.07sin(3771-36.87) A, what is the primary current of this transformer? (20 points) HINTS: I. Peak values of the secondary voltage and current are specified in...
1 pts The primary coil of a transformer has 100 loops and is connected to a circuit with 120 volts (primary voltage). What is the output voltage (secondary voltage) if the secondary coil has 50 loops? 60 volts O 240 volts O 100 volts O 50 volts 1 pts Question 18 Question 18 1 pts If the current in the primary coil of the above problem is 2 amps, what is the output current (current in secondary coil)?SEP o 1...
1. (10 PT) A three-phase bridge rectifier circuit shown in the figure phase voltage of 220 volts rms. A load of 100 Ω is connected across is supplied by a rectifier. Both the primary and secondary windings of transfor Assume the transformer has a turns ratio of unity mer are Y-connected a) 3 PTI On the top of voltage plot on next page indicate the diodes that will be conducting during different intervals of time. b) 17 PT] Plot the...
2. Figure 5 depicts how power is distributed from the power company to their customers through a combination of two transformers and a transmission line The transmission line is shown to have a resistance equal to 22. N, and N2 represent the number of turns on the primary or the secondary of the two transformers. İp is the current provided by the power company iis the current through the transmission line The power company provides 120v, 60 Hz to the...
11. An electrical system that's not grounded and is between 120 and 1000 volts must include the use of A. ground isolators. OB. equipotential barriers. C. ground detectors. OD. arc suppression. 12. Imagine that you're installing a feeder in a hospital that will terminate in five branch circuits in patient care areas. To make the feeder legal for this purpose in this area, you must O A. run two wire conductor EGCS. OB. use enhanced bonding practices on the feeder's...
Problem 1: The secondary winding of a transformer has a terminal voltage of v, (t) 282.8 sin 377t V. The turns ratio of the transformer is 100:200 (a0.50) The impedances of this transformer referred to the primary side are The equivalent circuit is shown below lf (a) If the secondary current of the transformer is i,()-7.07sin(3771-36.87) A, what is the primary current of this transformer? (20 points) HINTS: I. Peak values of the secondary voltage and current are specified in...
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