# What are the main causes of harmonics?

What are the main causes of harmonics?

Harmonic is a non linear load because linear load voltage deviated due to connection of some electrinie device such as converter,inverter

## Related questions

Description : What are even and odd harmonics?

Description : Why harmonics are generated in electrical system?

Description : What is mitigation of harmonics?

Description : What is current harmonics?

Description : Why do non linear loads cause harmonics?

Description : What causes random power outages?

Description : What causes transients?

Answer : Transient is a peak voltage take small period. It will occur due to lightning

Description : What causes lights to dim in house?

Answer : The main reason for generation of harmonics in a transformer could be saturation of core.

Description : Slot harmonics are reduced in induction motors by using (A) fractional-pitch windings (B) fractional-slot windings (C) integral-slot windings (D) distributed windings

Answer : Slot harmonics are reduced in induction motors by using fractional-slot windings

Description : Explain the effect of Harmonics on the Transformer.

Answer : Effect of Harmonics on the Transformer:  1. Core loss: Harmonic voltage increases the hysteresis and eddy current losses in the lamination. The amount of the core loss depends on ... small core vibrations.  5. Saturation problem: Sometimes additional harmonic voltage causes core saturation.

Answer : Harmonics in transformer result in increased core losses, increased I2R losses, and magnetic interference with communication circuits.

Description : State the need for reduction of harmonics in inverters. Enlist the various methods for reduction of harmonics in inverter output.

Answer : Transformer noise is generated due to vibration of core and winding this is because of magnetostriction and magnetomotive force.

Description : What causes diodes to fail in alternator?

Description : What are the main electrical equipment used in HPS ? State the function of each parts of it in brief.

Answer : Following Main Electrical Equipment used in HPS & their function: 1. Alternator 2. Exciter 3. Transformer 4. Switchgear   Function :  1) Alternator:- Alternator is coupled to ... part from the healthy section. It contains circuit breaker, relays, switches and other control devices.

Description : What are the main parts of a generator?

Answer : the main parts of the generator are as follows yoke Armature Poles field winding Prime mover  Commutator Shaft Bearings Brushes

Description : Symptoms of Back Pain Causes And Tips

Answer : Symptoms of Back Pain Causes And Tips Back pain is the most common complaint heard among the adults these days. It has been estimated that people do suffer from back pain at least once in their ... night sleep that will recover from all the bodily disorders and you wake up fresh the next morning.

Description : Acne Causes And Tips

Answer : Acne Causes And Tips Acne is a condition of the skin that causes zits or pimples. It includes blackheads, whiteheads, inflamed skin patches like cysts and reddish skin. It is a disorder of the ... skin needs enough rest to rebuild and repair. Women should avoid heavy makeup and oil based lotions.

Description : State the external causes of failure of electrical equipment.

Description : The main objectives in framing tariff are:  (A) The consumers must readily understand the tariffs (B) The tariff must be equitable amongst different consumers (C) Tariffs can be modified from time to time (D) All of the above

Answer : The main objectives in framing tariff are:  (A) The consumers must readily understand the tariffs (B) The tariff must be equitable amongst different consumers (C) Tariffs can be modified from time to time (D) All of the above

Answer : Discrimination between main and back up protection is provided by the use of relays which are slow.

Answer : It cannot be used for motors below 20 H.P.

Description : What is the main purpose of electroplating?

Answer : Protecting  reactive  metals  from  corrosion.

Description : What is the main use of a transistor?

Answer : Main use of a transistor as amplifier and as switch.

Description : List the main parts of D.C. motor

Answer : Main parts of D.C. motor and their functions:  Part Functions Yoke i) Provides mechanical support for poles. ii) Acts as protecting cover for machine. iii) Carries magnetic flux. ... a fixed physical position relative to the stator.  Shaft Used to transfer mechanical power

Description : List out main components of Diesel power station.

Answer : Main components of Diesel power station: 1) Diesel Engine 2) Engine Air intake system 3) Engine Fuel System 4) Engine Exhaust system 5) Engine cooling system 6) Engine Lubricating system 7) Engine Starting system 8) Diesel Engine Generator (Alternator)

Description : List out main components of Reactors.

Answer : List the main components of Reactors:  1. Core 2. Nuclear fuel (U235) 3. Moderator 4. Control Rod 5. Reflector 6. Reactor vessel 7. Shielding

Description : How rating of main switch and cable is selected for Industrial Installation.

Answer : 1. Rating of Main Switch or Fuse Rating is decided in industrial installation: Rating of main switch or fuse is based up the starting current of motor. For calculating starting current is considered 2 ... take 1.5 times the rated current or full load current. & thus cable rating is decided.

Description : The main advantage of AC over DC is:  (A) Conversion flexibility from one voltage level to other (B) AC can be easily converted into DC by using a rectifier (C) AC is easy to maintain & can be easily distributed at long distances (D) All of the above

Answer : Ac is easy to maintain and ac can be easily converted to dc by rectifier .There is no commutator for conversion in ac that's why ac machines are weight less and more efficiency.ac machines occupy less space than dc .

Answer : In main line service as compared to urban and suburban service distance between the stops is more, maximum speed reached is high, acceleration and retardation rates are low.

Answer : In split phase motor main winding is of thick wire placed at the bottom of the slots.

Answer : The main function of a fuse is to prevent excessive currents.

Answer : Main causes of noisy solenoid are strong tendency of fan out of laminations at the end caused by repulsion among magnetic lines of force, uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts.

Description : In star-star connection of 3-phase transformer, the triplen harmonics are suppressed by using (A) star connected tertiary windings (B) delta connected tertiary windings (C) neutral conductor (D) additional insulation for the phases

Description : What are the power quality disturbance?

Description : What are the different power quality issues?

Description : what is UPS and what are its uses?

Answer : Ups means uninterrupted power supply It supplies power when there is power supply outage. This is done by storing power in battery banks while power is on and then during power outage the DC in battery is converted to a.c by inverters

Description : Quality of a musical note depends on (1) Fundamental frequency (2) Amplitude of the wave (3) Harmonics present (4) Velocity of sound in the medium

Description : In order to reduce the harmful effects of harmonics on the AC side of a high voltage DC transmission system_____ are provided. (A) synchronous condensers (B) shunt capacitors (C) shunt filters (D) static compensators

Answer : In order to reduce the harmful effects of harmonics on the AC side of a high voltage DC transmission system shunt filters are provided.

Description : What is the use of power factor correction?

Description : What is the best power factor?

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

Description : What is power factor angle?

Description : What is difference between KW and KVA?

Answer : kW is kilowatt and kVA is kilovolt ampere. kW is unit of real power and kVA is unit of Apparent power.

Description : What is a digital power meter?

Description : What is an RF Power Meter?

Description : What is the difference between linear and nonlinear electrical loads?

Description : What is a non linear load?

Description : What is the advantage of high power factor?

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

Description : What is meant by KVA?

Answer : KVA - kilo volt ampere  Used to specify the transformer details

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