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A reactor in series with a motor will reduce starting current
it can be shorted out after the motor gets near synchronous speed
some motors have a rotor with two squirrel cages the outer on has longer higher resistance bars the inner heavier lower resistance bars which will do the same thing but with a bit more feedback with respect to actual motor speed for the softer starts and without external sensors or timers
or if i didnt understand the question
you may be charged more $$ for reactive load if you plants has lots of running unloaded motors and transformer ballasts for florescent lamps you facility will be paying for imaginary power you put capacitors in parallel with the incoming power to get the near unity power factor the power company likes
What else can I help you with?
What is reactive volt amps?
volt ampere reactive is the unit of reactive power.It is the power which does no useful work but is required to assist in performing work,such as setting up magnetic fields in motors and transformers.It is also called as imaginary power.It occurs in purely reactive circuit i.e. purely inductive or capacitive.The inductance absorbs the reactive power and capacitance injects the reactive power.In inductance,reactive power is utilised to develop the flux while in the capacitance,the reactive power's function is to store the charge.
Is mvar can used to measure mva?
No, mvar (megavolt-ampere reactive) is a unit of apparent power while MVA (megavolt-ampere) is a unit of real power. Mvar is used to measure reactive power, while MVA is used to measure total power (both real and reactive).
What is watt less power?
"Wattless power" refers to the reactive power in an electrical circuit that does not perform useful work, such as magnetizing a motor or generating a magnetic field. It is measured in units of volt-amperes reactive (VAR) and is necessary for maintaining voltage levels in the grid but does not contribute to real power consumption.
What power of the courts is reactive?
The power of judicial review is reactive, as it allows courts to review and invalidate laws or actions that are deemed unconstitutional only after they have been enacted or taken place. This power enables courts to respond to specific cases brought before them rather than proactively shaping future laws or policies.
Kvar is equal to what?
kVA is the unit for apparent power. Apparent power consists of active and reactive power. Active power is the share of the apparent power which transmits energy from the source (generator) to the user. Reactive power is the share of the apparent power which represents a useless oscillation of energy from the source to the user and back again. It occurs when on account of some »inertia« in the system there is a phase shift between voltage and current. This means that the current does not change polarity synchronous with the voltage. But the heat generated in a winding as well as the eddy current losses generated in a transformer core depend on the current only, regardless of whether it aligns with the voltage or not. Therefore the heat is always proportional to the square of the current amplitude, irrespective of the phase angle (the shift between voltage and current). So a transformer has to be rated (and selected) by apparent power. We define "complex power" as voltage times current (V*I), and thus the unit for power is the Volt-Amp (VA). When a circuit contains non-resistive elements (such as transformers), there is a component of power called "reactive power", which is power that is transmitted as a result of energy stored in inductors and capacitors. Reactive power does no useful work. Complex power is the sum of reactive power and real power (power which does work). When only real power is considered, the unit of power is the Watt. Transformers are rated in VA and not W because heat generated by electricity flowing through a conductor is proportional to the current flowing through the conductor. Although reactive power does no work, the current exists nonetheless and must be accounted for when selecting the proper sized wiring.
Which line requires compensation?
Basically an AC transmission line require compensation in terms of reactive power. To push the active power across a transmission line certain amount of reactive power is necessary. In AC transmission line reactive power is generated and consumed. Generator is responsible for the production of reactive and active power both. Than this reactive power is consumed by the load and transmission line. Additional reactive power s supplied by the capacitor. This extra power supplied by the capacitor is termed as reactive power compensation. Requirement of this reactive power is there because reactive power is necessary to maintain the voltage stability.
What is load compensation?
compensation of load by connecting a compensating device which adjust the real and reactive power in the distribution side or load side.
Do power saver really works?
No, it is not.These devices don't decrease your bill.It is basically about making compensation of reactive power with capacitors.So in your houses it isn't necessary to do that.Because your electric power meter does not count reactive power.
What has the author Foroozan Ghassemi written?
Foroozan Ghassemi has written: 'Fast-acting reactive power compensation'
Descibe about shunt reactors?
Shunt reactors are the inductors connected across the power line for power factor correction.The reactors injects reactive power in the transmission line for voltage compensation. The only disvantage of this shunt reactors is that it shorts whenever high voltage or transients occurs.Only stepped variation of the reactive power is possible.
Why reactive power is named as reactive?
Actually reactive power is a power which flows in between load to source which is a reactive action of the power given from source to load.the given power to load will not be utilised fully.some power will be oscillating from load to source.this is called reactive power.
What is shunt reactors?
A shunt reactor absorbs reactive power and increases the energy efficiency of any system. It is a small device used for power compensation in high voltage transmission lines and cable systems.
Why wattmeter measure the reactive power?
A watt meter will measure active power, not reactive power.
What happens to reactive power in a circuit that has both inductance and capacitance?
Inductors are considered to be a load for reactive power, meaning that they will draw reactive power from the system. Capacitors are considered to be sourced of reactive power, they feed reactive power into the system. If you have a circuit that is at unity (balanced with inductors and capacitors) no reactive power will be drawn from the source. You will have unity power factor. If your circuit is more inductive than capacitive it will be drawing reactive power from the source. The opposite is also true for capacitors.
Which excitation synchronous motor drawn reactive power?
Hi, Under excitation - inductive reactive power Over excitation - Capacitive reactive power.
How can you reduce reactive power?
If, for example, the reactive power of a load is due to its inductance, then installing a capacitor in parallel with the load will reduce the overall reactive power.
Is that the reactive power is a combination of both reactive power and imaginary power?
No. It is apparent power (expressed in volt amperes) that is the combination (vector sum) of true power (expressed in watts) and reactive power (expressed in reactive volt amperes). 'Imaginary power' is simply another name for 'reactive power' -where 'imaginary' is simply mathematicians-speak for 'quadrature' or 'right angles'.
