Answer / asif khan

Harmonic is presence of unwanted frequencies.
Few types of harmonics are listed below. these frequencies mainly gets generated due to modern electronic equipment e.g
Computer, inverters etc.

3rd level harmonics
5th level harmonic
7th Level Harmonic
11th level harmonics
13th level harmonics

3rd level harmonic is normal, however when it goes up to 5th or 7th it's considered a problem.
11th and 13th level harmonics usually found where rectifiers and DC loads are connected.

Answer / nilesh chougale

harmonics is nothing but an unwanted noise or ripples.

There are odd and even harmonics

Answer / kabilan

Harmonic is unwanted frequencies (AC)

Answer / s k tiwari

Harmonics just like air pollution in the air. its occurs due to inductive load

Answer / msr

presence of unwanted frequency component in current or
voltage other than fundamental frequency is known as harmonics .
basically harmonics are ac and dc harmonics .
we can also classified them as -
1.even harmonics (2nd ,4th,6th )frequency component
2.odd harmonics (3,5,7)
generally lower harmonics are more dangerous than higher
order harmonics.

Answer / harshit shukla

-harmonics are unwanted frequencies which distort current and
voltage wave forms and also increase I2R losses in line.
-In transmission line harmonics are produced due to transient
effect.They are also produced during switching ON and OFF of
transformer(magnetic coupling device)
-It is also noticed that in line when current peak and
harmonic peak occur at the same time,I2R loss become maximun.
-harmonics can be reduced by mounting filters near
transformers or generators.
-In power electronics devices it causes fluctuation.

What are the advantages of the three-phase motor over single phase motor?

0 Answers  

why transformer capacity is called KVA and motor capacity is called HP/KW? Why transformer capacity cant call HP/KVA?

5 Answers  

What is voltage ratio of a transformer?

0 Answers  

What is vector group? What is meant by DYN11?Why is it needed?

13 Answers   Areva, Bhel, BRG, Escorts, Fortis,

The coils having selfinductancs 10mh and15mh,effective inductance 40mh when connected in series aiding. what will be the equivalent inductance if we connect them in series opposing?

1 Answers   BSNL,

Is there a diode made that works with AC 120 volt 20 amp? If so can it completely stop all current flow in 1 direction at all times?

0 Answers  

please explain how to do 'pole drop test' on generator?

0 Answers  

What is earth fault?

3 Answers  

how does a shunt reactor maintains the bus voltage???

0 Answers  

What is floating voltage?

1 Answers  

How can calculate rotor temperature of the alternator? and is there any method to calculate that

1 Answers  

what is the difference between star and delta connection ? when we use each one ?what is the best ?

14 Answers   Amara Raja, Daikin,