Question

In: Electrical Engineering

3. A 60Hz, single phase line transmits power to an inductive load that has a receiving...

3. A 60Hz, single phase line transmits power to an inductive load that has a receiving voltage of 13.8KV, reactive factor of 0.6 and 5 MVA respectively. If this line has a impedance of 1+j2 ohms per conductor, Calculate the following: The voltage at the sending end (10 pts) b. The transmission line efficiency (10 pts) c. If this line is connected in parallel to a telephone wire and the conductors of the power line is labelled a and b and on the telephone wire 1 and 2 respectively. The power lines has a horizontal distance of 5m and the telephone wire is symmetrically positioned 3m below conductor 'b' with the telephone wires having 2m spacing. Determine the voltage induced on the telephone wire in V per km using the result of the current on this problem. Note that phasors la -- Ib and the neutral current is assumed zero. (10 pts)

Solutions

Expert Solution


Related Solutions

The power supply frequency is 60Hz. a) What is the power factor of the load? b)...
The power supply frequency is 60Hz. a) What is the power factor of the load? b) What is the active power [W] and reactive power [VAR] consumed by the resistors and inductances? c) Connect capacitor C to points a and b to set the power factor of the entire load to 1. What is the capacitance [F] of the capacitor? Since there is no picture, just tell me how to solve it.
c)    A 3-phase load draws an apparent power of 80kVA from a 415V 3-phase supply. The...
c)    A 3-phase load draws an apparent power of 80kVA from a 415V 3-phase supply. The power factor of the load is 0.85. Determine the real power supplied to the load and the rms line current? D) Explain the importance of energy storage for grids that have large amounts of wind power. Name one type of storage system used within a large electricity grid. E) Explain why AC loads are often rated in terms of their apparent power (VA), rather...
A three phase 10kW, 1700rpm, 60Hz, four poles, Y connected induction motor has a no-load speed...
A three phase 10kW, 1700rpm, 60Hz, four poles, Y connected induction motor has a no-load speed of 1750rpm. The rotational mechanical losses are constant and equal to 500W. The core losses are constant and equal to 300W. The copper losses in the stator equal to the copper losses in the rotor at full load. If the rotor resistance per phase is 0.25?, calculate the following: a.The frequency of the induced current in the rotor circuit at full load. b.The percentage...
A load draws between 100mA and 400mA at 6V. It is receiving power from an unregulated...
A load draws between 100mA and 400mA at 6V. It is receiving power from an unregulated DC power supply whose output voltage can vary between 8.5V and 12V. Design a Zener diode voltage regulator using a 6V Zener diode that regulates for diode currents greater than 4mA and has a maximum power rating of 6W. Show the circuit diagram for the completed design and specify the power rating for all components.
A 3-phase line has a resistance of 9 Ω/phase and a reactance of 23 Ω/phase. The...
A 3-phase line has a resistance of 9 Ω/phase and a reactance of 23 Ω/phase. The load at the receiving end is 130 MW at 0.8 p. f. lagging. Find the capacity of the synchronous condenser required to be connected at the receiving end to maintain the voltage at both ends of the transmission line at 132 KV.
Generally, a single-phase power is commonly found in domestic households, whereas a three-phase power is preferable...
Generally, a single-phase power is commonly found in domestic households, whereas a three-phase power is preferable for larger demands. For safety purpose, over-current protection components are compulsory in the electrical distribution systems. i. Explain two advantages of a three-phase system compared to a single-phase system in the distribution system. ii. Briefly describe the characteristic and the function of two types over-current protection device installed in the distribution board (DB) residential building. iii. Miniature circuit breakers (MCB) with different current rating...
3. Each time a modem transmits one bit, the receiving modem analyzes the signal arrives and...
3. Each time a modem transmits one bit, the receiving modem analyzes the signal arrives and decides whether the transmitted bit is 0 or 1. It makes an error with probability p, independent of whether any other bit is received correctly. a) If the transmission continues until first error, what is the distribution of random variable X, the number of bits transmitted? b) If p = 0.1, what is probability that X = 10? c) what is probability that X...
3. Each time a modem transmits one bit, the receiving modem analyzes the signal arrives and...
3. Each time a modem transmits one bit, the receiving modem analyzes the signal arrives and decides whether the transmitted bit is 0 or 1. It makes an error with probability p, independent of whether any other bit is received correctly. a) If the transmission continues until first error, what is the distribution of random variable X, the number of bits transmitted? b) If p = 0.1, what is probability that X = 10? c) what is probability that X...
A 3-phase 208V line-to-line), 4 pole 1746rpm induction motor is taking 45kVA at 0.9 power factor....
A 3-phase 208V line-to-line), 4 pole 1746rpm induction motor is taking 45kVA at 0.9 power factor. The total developed torque is 2000N-m and the rotational losses are 1.5kW. Determine the following: a) The rotor copper losses b) The overall efficiency c) The stator winding resistance (per-phase)
For a single phase bridge rectifier, the source is 200Vrms/60sssHz. The load is 2000W. the winding...
For a single phase bridge rectifier, the source is 200Vrms/60sssHz. The load is 2000W. the winding resistances of the transformer secondary is 0.5Ω and the forward drop resistance of each of the used diodes is 0.2 Ω. 1. What would be the load resistance. 2. Calculate the following: o TUF o Rectifier power efficiency o Rectification efficiency o Input power factor 3. Simulate the circuit and show the following: o Input and output voltage and current waveforms o Diode current...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT