Homework Answers
Add Answer to:
2. a. (15pt) Explain why and how a high voltage device (such as a power transformer) can be influenced by a lightning overvoltage b. (10pt) Wbich of the following is more harmful to a power transform...
(b) High voltage electric power transmitted to a city is dropped to a low voltage in a transformer before use. To keep the transformer at a steady temperature, heat (called the Joulean power diss...
(b) High voltage electric power transmitted to a city is dropped to a low voltage in a transformer before use. To keep the transformer at a steady temperature, heat (called the Joulean power dissipation) needs to be transferred to an ambient. Assuming the transfomer to be a vertical cylinder with a diameter of 0.4 m and height of 1 m, the walls are kept at 90°C in a stagnant fluid bath Determine the allowable heat dissipation if the fluid is...
Figure 2 shows a power supply circuit comprising a transformer coupling the mains voltage on the...
Figure 2 shows a power supply circuit comprising a transformer coupling the mains voltage on the left to the full-wave rectifier circuit on the right. It is given that the mains voltage (Vmains) is 230 V RMS, the mains frequency (fin) is 50 Hz, the transformer T1 has a ratio of 9:1, the load resistance (RL) is 1 k. and the capacitance of the capacitor (C) is 470 uF. a. Calculate the following: 1. the transformer AC output RMS voltage...
1. In class we derived how a transformer can up or downregulate the voltage in an...
1. In class we derived how a transformer can up or downregulate
the voltage in an electrical circuit with an alternating
current.
(a) Use the conservation of energy to deduce how the currents I1
and I2 must be related if you know the ratio of ε1/ε2 (for the
purpose of calculating the power delivered by a circuit ignore any
complications due to the fact that I(t) and ε(t) are
time-varying).
(b) In class I argued that power transmission is more...
EMM2802 MAYIJUNE 2016 QUESTION B A single phase transformer has a high voltage to low voltage...
EMM2802 MAYIJUNE 2016 QUESTION B A single phase transformer has a high voltage to low voltage ratio of 10. The following parameters are referred to low voltage side, with a supply of 200V. Equvalent Impedance referred to low woltage side Zev 0.1+jo.s a Load impedance referred to low voltage side R-4000 X-2310 Magnetizing Branch referred to low voltage side Draw an approximate equivalent circut with the given parameters and determine the following: 81 The magnetizing current (), the core loss...
can you calculate this question and explain why? thanks 1. A 250-kVA, 11000/2200-V, 50-Hz, single-phase transformer...
can you calculate this question and explain why?
thanks
1. A 250-kVA, 11000/2200-V, 50-Hz, single-phase transformer has the following parameters: RI 1.3 , R2 0.05 , Rel 193 k2, X1 4.5 Q X2 0.16 2 I,- 80 kQ Xml (a) Draw the approximate equivalent circuit of the transformer showing all the circuit parameters referred to the low-voltage side. Use the approximate equivalent circuit to calculate the input voltage and voltage regulation of the transformer when it delivers full load at...
can you answer this question and explain why? thanks. A 50-Hz 10-MVA, 66/22-kV distribution transformer has...
can you answer this question and explain why?
thanks.
A 50-Hz 10-MVA, 66/22-kV distribution transformer has a full-load efficiency of 98% at 0.8 lagging power factor. The transformer core loss is 80 kW. The transformer supplies an industrial load that has a constant demand of 5000 kW at 0.65 lagging power factor. The cost of energy is $0.1 per kWh. 1. In the following questions, assume that the voltage at the load terminal is maintained constant at 22 kV. calculations....
2. (15 pts) The reason why high voltage in power grid is used to transmit electric...
2. (15 pts) The reason why high voltage in power grid is used to transmit electric power is that it can reduce power waste along the transmission lines known as transmission loss. Suppose that a power station delivers 1,000 kW of power at 10,000 V to a city through wires with total resistance 3.0 22. How much power can be saved if the same power is delivered at 50,000 V?
1.In the design of electrical drives, high permeability materials are often used. Explain why this is...
1.In the design of electrical drives, high permeability materials are often used. Explain why this is so and give two examples of such materials. 2.If the current, voltage and power are measured at the terminals of a device containing only resistance and inductive reactance, how many tests are normally performed to determine the equivalent circuit parameters of transformers and induction drives. What simplification is made to the full equivalent circuit to facilitate this? plz give me the answer
a) Transformers work by the Principle of Electromagnetic Induction. Briefly explain this to a layman. b)...
a) Transformers work by the Principle of Electromagnetic Induction. Briefly explain this to a layman. b) i. [2 marks] [1 mark] State the two (2) types of losses in a transformer and also state where in the [2 marks] State two (2) advantages of an auto-transformer over an ordinary [2 marks] State why DC voltages do not work in transformers. 11. transformer these losses can be found. 111. transformer. c) Explain briefly why electric power is transmitted at very high...
Can you help me calculating this question? Thank you. Can you calculate this working and explain why? Thank you! 1. A 5...
Can you help me calculating this question? Thank you.
Can you calculate this working and explain why? Thank you! 1. A 50-Hz 10-MVA, 66/22-kV distribution transformer has a full-load efficiency of 98% at 0.8 lagging power factor. The transformer core loss is 80 kW. The transformer supplies an industrial load that has a constant demand of 5000 kW at 0.65 lagging power factor. The cost of energy is S0.1 per kWh. In the following questions, assume that the voltage at...
(b) High voltage electric power transmitted to a city is dropped to a low voltage in a transformer before use. To keep the transformer at a steady temperature, heat (called the Joulean power dissipation) needs to be transferred to an ambient. Assuming the transfomer to be a vertical cylinder with a diameter of 0.4 m and height of 1 m, the walls are kept at 90°C in a stagnant fluid bath Determine the allowable heat dissipation if the fluid is...
Figure 2 shows a power supply circuit comprising a transformer coupling the mains voltage on the left to the full-wave rectifier circuit on the right. It is given that the mains voltage (Vmains) is 230 V RMS, the mains frequency (fin) is 50 Hz, the transformer T1 has a ratio of 9:1, the load resistance (RL) is 1 k. and the capacitance of the capacitor (C) is 470 uF. a. Calculate the following: 1. the transformer AC output RMS voltage...
1. In class we derived how a transformer can up or downregulate
the voltage in an electrical circuit with an alternating
current.
(a) Use the conservation of energy to deduce how the currents I1
and I2 must be related if you know the ratio of ε1/ε2 (for the
purpose of calculating the power delivered by a circuit ignore any
complications due to the fact that I(t) and ε(t) are
time-varying).
(b) In class I argued that power transmission is more...
EMM2802 MAYIJUNE 2016 QUESTION B A single phase transformer has a high voltage to low voltage ratio of 10. The following parameters are referred to low voltage side, with a supply of 200V. Equvalent Impedance referred to low woltage side Zev 0.1+jo.s a Load impedance referred to low voltage side R-4000 X-2310 Magnetizing Branch referred to low voltage side Draw an approximate equivalent circut with the given parameters and determine the following: 81 The magnetizing current (), the core loss...
can you calculate this question and explain why?
thanks
1. A 250-kVA, 11000/2200-V, 50-Hz, single-phase transformer has the following parameters: RI 1.3 , R2 0.05 , Rel 193 k2, X1 4.5 Q X2 0.16 2 I,- 80 kQ Xml (a) Draw the approximate equivalent circuit of the transformer showing all the circuit parameters referred to the low-voltage side. Use the approximate equivalent circuit to calculate the input voltage and voltage regulation of the transformer when it delivers full load at...
can you answer this question and explain why?
thanks.
A 50-Hz 10-MVA, 66/22-kV distribution transformer has a full-load efficiency of 98% at 0.8 lagging power factor. The transformer core loss is 80 kW. The transformer supplies an industrial load that has a constant demand of 5000 kW at 0.65 lagging power factor. The cost of energy is $0.1 per kWh. 1. In the following questions, assume that the voltage at the load terminal is maintained constant at 22 kV. calculations....
2. (15 pts) The reason why high voltage in power grid is used to transmit electric power is that it can reduce power waste along the transmission lines known as transmission loss. Suppose that a power station delivers 1,000 kW of power at 10,000 V to a city through wires with total resistance 3.0 22. How much power can be saved if the same power is delivered at 50,000 V?
a) Transformers work by the Principle of Electromagnetic Induction. Briefly explain this to a layman. b) i. [2 marks] [1 mark] State the two (2) types of losses in a transformer and also state where in the [2 marks] State two (2) advantages of an auto-transformer over an ordinary [2 marks] State why DC voltages do not work in transformers. 11. transformer these losses can be found. 111. transformer. c) Explain briefly why electric power is transmitted at very high...
Can you help me calculating this question? Thank you.
Can you calculate this working and explain why? Thank you! 1. A 50-Hz 10-MVA, 66/22-kV distribution transformer has a full-load efficiency of 98% at 0.8 lagging power factor. The transformer core loss is 80 kW. The transformer supplies an industrial load that has a constant demand of 5000 kW at 0.65 lagging power factor. The cost of energy is S0.1 per kWh. In the following questions, assume that the voltage at...
Most questions answered within 3 hours.
-
I just took a final for chemistry 2. There were alot of
questions on cell potential....
asked 2 minutes ago -
In which region of the country did Methodists and
Baptists have the largest following?
a. The...
asked 2 minutes ago -
A man is standing on a ledge when he throws a ball. The speed of
the...
asked 10 minutes ago -
Facebook Marketing benefit: How is this tool useful for
marketing purposes? Identify and explain at least...
asked 22 minutes ago -
What are the five considerations relevant to the
substantive fairness of a dismissal for permanent incapacity?...
asked 21 minutes ago -
Prince Electronics, a manufacturer of consumer electronic
goods, has five distribution centers in different regions of...
asked 24 minutes ago -
1.) For the following general reaction, rate = k[A]2 and k = 1.3
× 10−2 M−1...
asked 27 minutes ago -
In the Enron documentary(Netflix) What ethical issues did you
observe and who was responsible for them?
asked 28 minutes ago -
Many products fail, some of them spectacularly. Why do you
believe the failure rate for new...
asked 27 minutes ago -
An important news announcement is transmitted by radio waves to
people who are 65 km away,...
asked 46 minutes ago -
On June 30, 2021, Rosetta Granite purchased equipment for
$130,000. The estimated useful life of the...
asked 46 minutes ago -
. If you were the CEO of Agricole, would you pursue an
acquisition target in the...
asked 46 minutes ago