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In electric power [[Electric power transmission|transmission]] and [[Electric power distribution|distribution]], '''volt-ampere reactive''' ('''var''') is a unit used to measure [[reactive power]] in an AC electric power system. Reactive power exists in an AC circuit when the current and voltage are not in phase. The correct symbol is var and not Var, VAr, or VAR,<ref>[http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:1980:039:0040:0050:EN:PDF Council Directive on units of measurements 80/181/EEC]: "Special names for the unit of power: the name volt–ampere (symbol ‘VA’) when it is used to express the apparent power of alternating electric current, and var (symbol ‘var’) when it is used to express reactive electric power." Chapter 1.2.3., p. 6</ref> but all three terms are widely used. The term ''var'' was proposed by the Romanian electrical engineer [[Constantin Budeanu]] and introduced in 1930 by the [[International Electrotechnical Commission|IEC]] in [[Stockholm]], which has adopted it as the unit for [[electrical reactance|reactive]] power.
Stress aid! - Transfer, stretch, strengthen and loosen up i n this hatha yoga class for ALL RANGES. Instructor Susannah Raulino has over 25 years of expertise training and instructing yoga and meditation. Improve your practice and enhance your health as you join with yoga poses in a manner that is just best for you. The Hatha Ratnavali (17th century CE ) 34 is likely one of the few texts to try an inventory of all of the 84, though 4 out of its listing do not need meaningful translations from the Sanskrit, and 21 are merely talked about with none description.


Vars may be considered as either the [[imaginary part]] of [[apparent power]], or the power flowing into a reactive load, where voltage and current are specified in [[volt]]s and [[ampere]]s. The two definitions are equivalent.
35 verification wanted In all, 52 asanas of the Hatha Ratnavali are confirmed and described by the text itself, or other asana corpora. 36 The best solution to explain the Vinyasa yoga fashion is to level out the nickname, movement yoga, because students transfer from one position directly into another. It makes use of a faster pace than Iyengar and Ashtanga. It's not the best yoga class for a newbie to grasp, however once you master the essential poses, Vinyasa yoga is a wonderful solution to work out whereas working towards yoga.


==Reactive power==
The main focus of this pose is the pelvis, says Lewis, and you need to be sure to're holding in your stomach so your lower back would not cave in. Doing so helps strengthen pelvic ground muscle tissue, which  college loan company get weakened in ladies with diabetes. A research revealed in the journal Diabetes Care found that girls with diabetes are at an increased risk of developing  california home mortgage loans (click through the following article) pelvic flooring problems, similar to urinary incontinence and overactive bladder. It's also another pose that speeds blood movement to the liver and kidney and aids digestion.
[[File:Cmplxpower.svg|thumb|The apparent power S (measured in units of volt-amperes) is the [[vector sum]] of the reactive power Q (in volt-amperes reactive) and the real power P (in watts). ]]
{{main|AC power}}
A [[Sine wave|sinusoid]]ally alternating [[voltage]] applied to a purely [[electrical resistance|resistive]] load results in an alternating [[Electric current|current]] that is fully in phase with the voltage. However, in many applications it is common for there to be a reactive component to the system, that is, the system possesses [[capacitance]], [[inductance]], or both. These electrical properties cause the current to change phase with respect to the voltage: capacitance tending the current to lead the voltage in phase, and inductance to lag it.


For sinusoid currents and voltages at the same frequency, reactive power in vars is the product of the [[Root mean square|RMS]] voltage and current, or the [[AC power|apparent power]], multiplied by the sine of the [[phase angle]] between the voltage and the current. The reactive power <math>Q</math>, (measured in units of volt-amperes reactive or var), is given by:
And according to Yoga Journal , it is historically believed that this pose reduces obesity. From a standing position, step your proper leg ahead just a few feet, and bend your proper knee holding your left leg straight. Your knee should be at a proper angle to the ground. By no means allow your knee to extend past your ankle. Your arms can relaxation in your hips or if you happen to want support, place them on both facet of your right foot.


:<math>Q = V_\mathrm{rms}I_\mathrm{rms}\sin \left(\phi \right)\,</math>
Really feel the stretch in your internal left leg and the strengthening in your proper leg. Take 10 gradual deep breaths as you maintain the position. Get up to a fantastic day by saluting the sun. This progressive morning sequence will energize the physique with breath and target areas of the physique that need some extra love after a night of sleep. We are going to start off slow then progress to a rejuvenating circulate to provde the power to step off your mat and into your day.


where <math>\phi</math> is the phase angle between the voltage and current.
All ranges, variations might be given. Hatha Yoga Thanks for an excellent query Doug. To a certain extent it depends upon the fashion of yoga you are taking. Certain kinds of yoga have longer holds in yoga poses and sure kinds of yoga have shorter holds. Vinyasa yoga for example flows from one pose to another with breath so there are little or no holds within the poses. Return  sport betting england manager from Primary Yoga to Modern Dance Techniques Less stress
Q refers to the maximum value of the instantaneous power absorbed by the reactive component of the load.
 
Only [[AC power|effective power]], the actual power delivered to or consumed by the load, is expressed in watts. Imaginary power is properly expressed in volt-amperes reactive.
 
==Physical significance of Reactive power==
 
Reactive power (measured in vars) is present in a system containing reactive (inductive or capacitive) components and can be either produced or consumed by different load/generation elements. Though "imaginary", the reactive power has great physical significance and is very essential to the operation of the electrical system as a whole. While the Real Power P is used to supply the energy required to perform actual work (such as running a motor), the reactive power regulates the voltage in the system. If the reactive power is too low, inductive loads such as transformers will be unable to maintain voltages necessary for the generation of electromagnetic fields, leading to a "Voltage collapses" that create [[Power Outage|blackouts]] . [[Transmission line]] impedances also make it necessary to provide reactive power to maintain voltage levels necessary for active power to flow through. Therefore Reactive power is essential to move active power through transmission and distribution systems to the customer. However if reactive power in a system is too high, there is increased heat loss in transmission lines and loads as the current flowing through the system is much higher, creating a potentially hazardous breakdown situation. The power factor of a load tells us what fraction of the [[AC power|apparent power]] is in the form of Real Power and performs actual work. A high [[power factor]] is desirable since it minimizes the amount of reactive power needed by the load, reducing heat losses and maximizing efficiency.
 
==See also==
*[[Power factor]]
*[[Volt-ampere]]
*[[Watt]]
 
==Notes and references==
{{reflist}}
* {{FS1037C}}
 
[[Category:Electricity]]
[[Category:Units of power]]

Latest revision as of 23:52, 10 December 2014

Stress aid! - Transfer, stretch, strengthen and loosen up i n this hatha yoga class for ALL RANGES. Instructor Susannah Raulino has over 25 years of expertise training and instructing yoga and meditation. Improve your practice and enhance your health as you join with yoga poses in a manner that is just best for you. The Hatha Ratnavali (17th century CE ) 34 is likely one of the few texts to try an inventory of all of the 84, though 4 out of its listing do not need meaningful translations from the Sanskrit, and 21 are merely talked about with none description. 

35 verification wanted In all, 52 asanas of the Hatha Ratnavali are confirmed and described by the text itself, or other asana corpora. 36 The best solution to explain the Vinyasa yoga fashion is to level out the nickname, movement yoga, because students transfer from one position directly into another. It makes use of a faster pace than Iyengar and Ashtanga. It's not the best yoga class for a newbie to grasp, however once you master the essential poses, Vinyasa yoga is a wonderful solution to work out whereas working towards yoga.

The main focus of this pose is the pelvis, says Lewis, and you need to be sure to're holding in your stomach so your lower back would not cave in. Doing so helps strengthen pelvic ground muscle tissue, which  college loan company get weakened in ladies with diabetes. A research revealed in the journal Diabetes Care found that girls with diabetes are at an increased risk of developing  california home mortgage loans (click through the following article) pelvic flooring problems, similar to urinary incontinence and overactive bladder. It's also another pose that speeds blood movement to the liver and kidney and aids digestion.

And according to Yoga Journal , it is historically believed that this pose reduces obesity. From a standing position, step your proper leg ahead just a few feet, and bend your proper knee holding your left leg straight. Your knee should be at a proper angle to the ground. By no means allow your knee to extend past your ankle. Your arms can relaxation in your hips or if you happen to want support, place them on both facet of your right foot.

Really feel the stretch in your internal left leg and the strengthening in your proper leg. Take 10 gradual deep breaths as you maintain the position. Get up to a fantastic day by saluting the sun. This progressive morning sequence will energize the physique with breath and target areas of the physique that need some extra love after a night of sleep. We are going to start off slow then progress to a rejuvenating circulate to provde the power to step off your mat and into your day.

All ranges, variations might be given. Hatha Yoga Thanks for an excellent query Doug. To a certain extent it depends upon the fashion of yoga you are taking. Certain kinds of yoga have longer holds in yoga poses and sure kinds of yoga have shorter holds. Vinyasa yoga for example flows from one pose to another with breath so there are little or no holds within the poses. Return  sport betting england manager from Primary Yoga to Modern Dance Techniques Less stress
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