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

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asked Mar 8, 2018 by anonymous
recategorized Apr 21, 2018 by anonymous

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A synchronous motor has better power factor as compared to that of an equivalent induction motor...

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

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asked Aug 18, 2019 by anonymous

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asked Mar 25, 2018 by anonymous

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Power factor of the system is kept high?

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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?

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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.

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

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

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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.

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asked Mar 19, 2018 by anonymous

What is the maximum value of power factor?

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

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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.

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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.

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asked Mar 16, 2018 by anonymous

What is the power factor of purely resistive circuit?

What is the power factor of purely resistive circuit.

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asked Mar 10, 2018 by anonymous

What is the use of power factor correction?

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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

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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.

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asked Mar 25, 2018 by anonymous

Power factor of electric bulb is?

Last answer: Power factor of electric bulb is unity.

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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.

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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.

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asked Mar 20, 2018 by anonymous

Load factor of a power station is generally?

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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.

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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

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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.

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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°.

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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.

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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.

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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 .

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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.

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69 views 1 answer

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

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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)

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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.

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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

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anonymous · Answer 1 · 2018-03-08T08:45:39+0000

answered Mar 8, 2018 by anonymous

Power factor of semiconverter is better than full converter

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

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