What is the use of power factor correction?

Question

asked Mar 10, 2018 by anonymous

70 views

Please log in or register to answer this question.

← Prev Question Next Question →

Related questions

asked Apr 28, 2018 by anonymous

The benefit of power factor correction in a power system is

The benefit of power factor correction in a power system is (A) lower power consumption (B) increased demand charge (C) reduced load carrying capabilities in existing lines (D) reduced voltage profile

Last answer: The benefit of power factor correction in a power system is lower power consumption

0 like 0 dislike

71 views 1 answer

asked Sep 29, 2018 by anonymous

Draw and explain bulk correction method for power factor & control.

Last answer: Bulk correction method for power factor & control: i) Here individual starter controls the capacitors located at distribution panel. ii) Centralized compensation is employed in large industrial plants where many ... capacitor units in steps to maintain P.F. more than preset limit (0.95).

0 like 0 dislike

90 views 1 answer

asked Mar 25, 2018 by anonymous

Capacitors for power factor correction are rated in?

Last answer: Capacitors for power factor correction are rated in kVAR.

0 like 0 dislike

57 views 1 answer

asked Mar 20, 2018 by anonymous

For power factor correction, synchronous motors operate at?

Last answer: For power factor correction, synchronous motors operate at no-load and greatly over-excited fields.

0 like 0 dislike

76 views 1 answer

asked Mar 10, 2018 by anonymous

What is the advantage of high power factor?

Last answer: Reduced copper losses Smaller conductor size Improve voltage regulation Increase system capability Less energy bill

0 like 0 dislike

75 views 2 answers

asked Mar 10, 2018 by anonymous

What is the use of stability factor?

0 like 0 dislike

44 views 0 answers

asked Mar 10, 2018 by anonymous

What is the best power factor?

Last answer: It is unity power factor but difficult to achieve in dynamic loads

0 like 0 dislike

75 views 1 answer

asked Mar 10, 2018 by anonymous

What is power factor angle?

0 like 0 dislike

59 views 0 answers

asked Mar 10, 2018 by anonymous

Can you have a power factor greater than 1?

Last answer: We cannot have power factor greater than 1. As it is a measure of cosine of angle between voltage and current.

0 like 0 dislike

103 views 1 answer

asked Mar 10, 2018 by anonymous

Why do we need to correct power factor?

0 like 0 dislike

52 views 0 answers

asked Mar 10, 2018 by anonymous

How do you measure power factor?

Last answer: P= 1.83*V*I*COS@ where P is power V is voltage I is current COS @ is P.F COS@= P/(1.83*V*I) in other way cos @ = true power/apparent power

0 like 0 dislike

66 views 1 answer

asked May 17, 2020 by anonymous

What is the value of capacitance required to improve power factor from 0.7 to 0.9.

What is the value of capacitance required to improve power factor from 0.7 to 0.9. Given that: Real power = 50 W Vrms of the source = 120 Frequency = 50 Hz #powerfactor

0 like 0 dislike

184 views 0 answers

asked Mar 19, 2018 by anonymous

What is the maximum value of power factor?

Last answer: 1 is the maximum value of power factor.

0 like 0 dislike

79 views 1 answer

asked Mar 16, 2018 by anonymous

What is the power factor of purely resistive circuit?

What is the power factor of purely resistive circuit.

Last answer: Unity that is 1

0 like 0 dislike

169 views 2 answers

asked Apr 29, 2018 by anonymous

What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016

What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these

Last answer: What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these

0 like 0 dislike

135 views 1 answer

asked May 8, 2018 by anonymous

An _____________is a network of electrical components used to supply, transfer and use electric power:

An _____________is a network of electrical components used to supply, transfer and use electric power: (A) Electric power system (B) Electric power (C) All of the above (D) None of the above

Last answer: An Electric power system is a network of electrical components used to supply, transfer and use electric power.

0 like 0 dislike

68 views 1 answer

asked Mar 10, 2018 by anonymous

How much power does an Arduino use?

0 like 0 dislike

63 views 0 answers

asked Mar 25, 2018 by anonymous

The power factor of a D.C. circuit is always?

Last answer: The power factor of a D.C. circuit is always unity.

0 like 0 dislike

141 views 1 answer

asked Mar 25, 2018 by anonymous

The ratio of active power to apparent power is known as____ factor.

Last answer: The ratio of active power to apparent power is known as power factor.

0 like 0 dislike

190 views 1 answer

asked Mar 25, 2018 by anonymous

The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is?

Last answer: The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is 32 kW.

0 like 0 dislike

307 views 1 answer

asked Mar 25, 2018 by anonymous

Power factor of the system is kept high?

Last answer: Power factor of the system is kept high to reduce line losses, to maximise the utilization of the capacities of generators, lines and transformers, to reduce voltage regulation of the line.

0 like 0 dislike

90 views 1 answer

asked Mar 20, 2018 by anonymous

When a D.C. series motor is connected to A.C. supply, the power factor will be low because of?

Last answer: When a D.C. series motor is connected to A.C. supply, the power factor will be low because of high inductance of field and armature circuits.

0 like 0 dislike

91 views 1 answer

asked Mar 20, 2018 by anonymous

The power factor of a single-phase induction motor is usually?

Last answer: The power factor of a single-phase induction motor is usually lagging.

0 like 0 dislike

99 views 1 answer

asked Mar 20, 2018 by anonymous

The primary reason for low power factor is supply system is due to installation of?

Last answer: The primary reason for low power factor is supply system is due to installation of induction motors.

0 like 0 dislike

84 views 1 answer

asked Mar 20, 2018 by anonymous

The power loss is an important factor for the design of?

Last answer: The power loss is an important factor for the design of transmission line.

0 like 0 dislike

80 views 1 answer

asked Mar 19, 2018 by anonymous

Minimum voltage regulation occurs when the power factor of the load is?

Last answer: Minimum voltage regulation occurs when the power factor of the load is leading.

0 like 0 dislike

112 views 1 answer

asked Mar 18, 2018 by anonymous

If the load of the normally excited synchronous motor is increased the power factor will?

Last answer: If the load of the normally excited synchronous motor is increased the power factor will become lagging.

0 like 0 dislike

80 views 1 answer

asked Mar 18, 2018 by anonymous

If the field of synchronous motor is under excited, power factor will be?

Last answer: If the field of synchronous motor is under excited, power factor will be lagging.

0 like 0 dislike

151 views 1 answer

asked Mar 8, 2018 by anonymous

Why the power factor of semiconverter is better than full converter?

Last answer: Power factor of semiconverter is better than full converter

0 like 0 dislike

2.7k views 1 answer

asked Mar 3, 2018 by anonymous

At which time power factor of the induction motor is low?

Last answer: The power factor of the inducction motor is low at the time of starting as compare to while the induction motor is running.

0 like 0 dislike

133 views 1 answer

asked Mar 25, 2018 by anonymous

Power factor of electric bulb is?

Last answer: Power factor of electric bulb is unity.

0 like 0 dislike

68 views 1 answer

asked Mar 25, 2018 by anonymous

Power factor of an inductive circuit is usually improved by connecting capacitor to it in?

Last answer: Power factor of an inductive circuit is usually improved by connecting capacitor to it in parallel.

0 like 0 dislike

152 views 1 answer

asked Mar 24, 2018 by anonymous

Power factor of an electrical circuit is equal to?

Last answer: Power factor of an electrical circuit is equal to R/Z, cosine of phase angle difference between current and voltage, kW/kVA.

0 like 0 dislike

153 views 1 answer

asked Mar 20, 2018 by anonymous

Load factor of a power station is generally?

Last answer: Load factor of a power station is generally less than unity.

0 like 0 dislike

52 views 1 answer

asked Mar 20, 2018 by anonymous

Load factor of a power station is defined as?

Last answer: Load factor of a power station is defined as average load/maximum demand.

0 like 0 dislike

87 views 1 answer

asked Mar 25, 2018 by anonymous

The power factor at resonance in R-L- C parallel circuit is?

Last answer: since a rlc circuit at resonance behaves like a pure resistive circuit, i.e there is no phase difference between current and voltage, hence the power factor is unity.

0 like 0 dislike

227 views 2 answers

asked Mar 21, 2018 by anonymous

In a single phase power factor meter the phase difference between the currents in the two pressure coils is?

Last answer: In a single phase power factor meter the phase difference between the currents in the two pressure coils is exactly 90°.

0 like 0 dislike

158 views 1 answer

asked Mar 21, 2018 by anonymous

In a low power factor wattmeter the compensating coil is connected?

Last answer: In a low power factor wattmeter the compensating coil is connected in series with pressure coil.

0 like 0 dislike

298 views 1 answer

asked Mar 21, 2018 by anonymous

In a low power factor wattmeter the pressure coil is connected?

Last answer: In a low power factor wattmeter the pressure coil is connected to the load side of the current coil.

0 like 0 dislike

145 views 1 answer

asked Mar 20, 2018 by anonymous

For a consumer the most economical power factor is generally?

Last answer: For a consumer the most economical power factor is generally 0.95 lagging .

0 like 0 dislike

134 views 1 answer

asked Mar 18, 2018 by anonymous

The synchronous motor which works on leading power factor and does not drive any mechanical load is called?

Last answer: The synchronous motor which works on leading power factor and does not drive any mechanical load is called synchronous condenser.

0 like 0 dislike

69 views 1 answer

asked May 22, 2020 by anonymous

State the effects of low power factor on efficiency and voltage regulation of short transmission lines.

Last answer: i) Effect of Low power factor on efficiency:- When power factor of load reduces current drawn by transmission line increases so copper losses in transmission line increases, hence transmission ... increases, so voltage drop in transmission line increases so regulation increases. (Become Poor)

0 like 0 dislike

71 views 1 answer

asked May 17, 2020 by anonymous

Briefly explain how the power factor of an inductive circuit can be improved.

Last answer: As we know that power factor should be corrected to ensure that the current supplied is cost friendly. Meaning the power factor should be around one but not greater than one(0.8-0.9) in a ... an inductive circuit due to the inductive reactance which oppose the change of current in the ac circuit.

0 like 0 dislike

95 views 1 answer

asked Sep 6, 2018 by anonymous

State the significance of power factor.

Last answer: Significance of power factor:- 1. Cosine of angle between voltage & current in a circuit is called power factor. 2. It is a measure of the real power in a circuit. 3. Inductive & ... KVA rating equipment 5. Greater conductor size 6. CosØ = R/Z CosØ= Active Power/ Apparent Power

0 like 0 dislike

36 views 1 answer

asked Apr 30, 2018 by anonymous

The power factor of dielectric :

The power factor of dielectric : (A) is a function of temperature of the dielectric only (B) depends only on voltage stress to which the dielectric is stressed (C) always constant (D) both (A) and (B)

Last answer: The power factor of dielectric : (A) is a function of temperature of the dielectric only (B) depends only on voltage stress to which the dielectric is stressed (C) always constant (D) both (A) and (B)

0 like 0 dislike

57 views 1 answer

asked Apr 28, 2018 by anonymous

The power factor angle and torque angle of a salient pole synchronous generator drawing a current of 1.0 pu

The power factor angle and torque angle of a salient pole synchronous generator drawing a current of 1.0 pu from a lagging load are 45o and 15o, respectively. The direct axis and quadrature axis currents, respectively, are (A) 0.5 pu, 0.866 pu (B) 0.866 pu, 0.5 pu (C) 0.707 pu, 0.707 pu (D) 0.5 pu, 0.5 pu

Last answer: The power factor angle and torque angle of a salient pole synchronous generator drawing a current of 1.0 pu from a lagging load are 45o and 15o, respectively. The direct axis and quadrature axis currents, respectively, are 0.866 pu, 0.5 pu

0 like 0 dislike

50 views 1 answer

asked Mar 21, 2018 by anonymous

The power factor of a single phase load can be calculated if the instruments available are?

Last answer: The power factor of a single phase load can be calculated if the instruments available are three ammeters or three voltmeters.

0 like 0 dislike

133 views 2 answers

asked Mar 21, 2018 by anonymous

In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at?

Last answer: In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at 120°.

0 like 0 dislike

80 views 1 answer

asked Mar 21, 2018 by anonymous

The two pressure coils of a single phase power factor meter have?

Last answer: The two pressure coils of a single phase power factor meter have the same dimensions and the same number of turns.

0 like 0 dislike

72 views 1 answer

asked Mar 18, 2018 by anonymous

The power factor of an alternator depends on?

Last answer: The power factor of an alternator depends on load.

0 like 0 dislike

77 views 1 answer

What is the use of power factor correction?

Please log in or register to add a comment.

Please log in or register to answer this question.

0 Answers

Related questions