What is difference between KW and KVA?
Last Answer : kW is kilowatt and kVA is kilovolt ampere. kW is unit of real power and kVA is unit of Apparent power.
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160 views
1 answer
asked
Mar 10, 2018
by
anonymous

Why are generators rated in kVA not in kW ?
Last Answer : Because It's rating of generator kva is apparent power. Kw is active power which we use. And one is kvar reactive power.
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116 views
3 answers
asked
Aug 19, 2019
by
anonymous

Why Transformer rating is given in kVA?
Last Answer : Because of core losses and iron losses as core losses are measured in amps and cu losses in voltage ....this is definatly reason for the rating Or kVA is the unit for apparent power. Apparent ... shift between voltage and current). So a transformer has to be rated (and selected) by apparent power.
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2.8k views
6 answers
asked
Aug 12, 2018
by
anonymous
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Define kVA rating of transformer.
Last Answer : kVA rating of transformer is defined as the product of voltage (V) and current (I) on primary side of transformer or secondary side of transformer divided by 1000. On both side the VA rating remains ... Mathematically kVA rating is given by, kVA rating of transformer = V1I1/1000 =V2I2/1000
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158 views
1 answer
asked
Aug 12, 2018
by
anonymous

A 40 kVA transformer has a core loss of 400 W and a full load copper loss of 800 W. The proportion of full load at maximum efficiency is
Last Answer : A 40 kVA transformer has a core loss of 400 W and a full load copper loss of 800 W. The proportion of full load at maximum efficiency is 0.707
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774 views
1 answer
asked
May 8, 2018
by
anonymous

The kVA rating of Three-phase transformer with Voltage = 200V and Current = 100A will be : (A) 34.64 kVA (B) 75 kVA (C) 20 kVA (D) None of the above
Last Answer : The kVA rating of Three-phase transformer with Voltage = 200V and Current = 100A will be : 34.64 kVA
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199 views
1 answer
asked
May 8, 2018
by
anonymous

The apparent power drawn by an A.C. circuit is 10 kVA and active power is 8 kW. The reactive power in the circuit is?
Last Answer : The apparent power drawn by an A.C. circuit is 10 kVA and active power is 8 kW. The reactive power in the circuit is 6 kVAR.
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731 views
1 answer
asked
Mar 25, 2018
by
anonymous

What is meant by power dip?
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62 views
0 answers
asked
Mar 10, 2018
by
anonymous

What is meant by a voltage surge?
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57 views
0 answers
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Mar 10, 2018
by
anonymous

What is the use of power factor correction?
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91 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.
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131 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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88 views
1 answer
asked
Mar 10, 2018
by
anonymous

What is power factor angle?
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67 views
0 answers
asked
Mar 10, 2018
by
anonymous
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How much is 1 unit of electricity?
Last Answer : 1 unit of electricity is equal to 1 kWh.
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86 views
1 answer
asked
Mar 10, 2018
by
anonymous

What is a digital power meter?
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53 views
0 answers
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Mar 10, 2018
by
anonymous

What is an RF Power Meter?
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52 views
0 answers
asked
Mar 10, 2018
by
anonymous

What causes random power outages?
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52 views
0 answers
asked
Mar 10, 2018
by
anonymous

What is mitigation of harmonics?
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56 views
0 answers
asked
Mar 10, 2018
by
anonymous

What is the difference between linear and nonlinear electrical loads?
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1.1k views
0 answers
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Mar 10, 2018
by
anonymous

What is current harmonics?
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54 views
0 answers
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Mar 10, 2018
by
anonymous

What is a non linear load?
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60 views
0 answers
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
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103 views
2 answers
asked
Mar 10, 2018
by
anonymous
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Why do we need to correct power factor?
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62 views
0 answers
asked
Mar 10, 2018
by
anonymous

How do you read a KWH Meter?
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78 views
0 answers
asked
Mar 10, 2018
by
anonymous

What is the cause of voltage fluctuation?
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61 views
0 answers
asked
Mar 10, 2018
by
anonymous

What are even and odd harmonics?
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61 views
0 answers
asked
Mar 10, 2018
by
anonymous

What are the main causes of harmonics?
Last Answer : Harmonic is a non linear load because linear load voltage deviated due to connection of some electrinie device such as converter,inverter
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177 views
1 answer
asked
Mar 10, 2018
by
anonymous

Why do non linear loads cause harmonics?
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94 views
0 answers
asked
Mar 10, 2018
by
anonymous

Why harmonics are generated in electrical system?
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65 views
0 answers
asked
Mar 10, 2018
by
anonymous

What is power logger?
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175 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
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96 views
1 answer
asked
Mar 10, 2018
by
anonymous

What does an electric meter measure?
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71 views
0 answers
asked
Mar 10, 2018
by
anonymous

What are the power quality disturbance?
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81 views
0 answers
asked
Mar 10, 2018
by
anonymous

What is harmonic in power quality?
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59 views
0 answers
asked
Mar 10, 2018
by
anonymous

What is a power quality analyzer?
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446 views
0 answers
asked
Mar 10, 2018
by
anonymous

What is power quality meter?
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60 views
0 answers
asked
Mar 10, 2018
by
anonymous

What are the different power quality issues?
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69 views
0 answers
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Mar 10, 2018
by
anonymous

What is good power quality?
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68 views
0 answers
asked
Mar 10, 2018
by
anonymous

What is power quality monitoring?
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71 views
0 answers
asked
Mar 10, 2018
by
anonymous

Why do dimmable LED lights flicker?
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92 views
0 answers
asked
Mar 10, 2018
by
anonymous

Can a power surge erase a hard drive?
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57 views
0 answers
asked
Mar 10, 2018
by
anonymous

What can you do to prevent a power surge?
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59 views
0 answers
asked
Mar 10, 2018
by
anonymous

What is the difference between a blackout and brownout?
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67 views
0 answers
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Mar 10, 2018
by
anonymous

What is the cause of a brownout?
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53 views
0 answers
asked
Mar 10, 2018
by
anonymous

What can cause a short circuit?
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63 views
0 answers
asked
Mar 10, 2018
by
anonymous

What causes transients?
Last Answer : Transient is a peak voltage take small period. It will occur due to lightning
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125 views
1 answer
asked
Mar 10, 2018
by
anonymous

Can power surge damage your computer?
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65 views
0 answers
asked
Mar 10, 2018
by
anonymous

What causes lights to dim in house?
Last Answer : While taking a more load from other Equipment
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207 views
1 answer
asked
Mar 10, 2018
by
anonymous

What is the definition of brownout?
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56 views
0 answers
asked
Mar 10, 2018
by
anonymous

How often do power surges occur?
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64 views
0 answers
asked
Mar 10, 2018
by
anonymous
