KVAR RATING CALCULATOR,CAPACITOR BANK SIZE CALCULATION

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  Determination of Required Capacitor Rating by measurement 3 Methods are used. 1. Measurement with current and power factor 2.Measurement with recording of Active and Reactive power. 3.Measurement by Reading Meters . 1 . Measurement with Current and power factor The active power P is calculate from the measured voltage V ,apparent current Is and Power Factor P=√3*Voltage*apparent Current*cosψ *10^-3 If the desired power factor cosψ has been specified, the capacitor power rating can be calculate from the following formula: Qc = P. (tan ψactual - tanψ desired) Let's See the Example Measured Apparent Current Is : 248 Amps Power Factor cos ψ1 = 0.86 Desired Cos ψ2 = 0.92 Voltage V :397 V p=√3 * 397 * 248 * 0.86 * 103 P = 146.6 KW Qc= P. (tanψ actual - tanψ desired) = 146.6(0.59 - 0.42) = 24.9 KVAR
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METHORD OF CALCUATE THE SPEICIFIC GRAVITY OF A SPECIFIC GRAVITY CUP

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  First Calculate the Volume 

Steps to Calculate the volume 

1.Measure the Empty weight of the Specific gravity cup

2.Put Distilled water in the cup.

3.Measure the Weight of the cup after filled the distilled water.

4.Measure the temperature of the distilled water

5.Measure the Atmospheric pressure

6.Find the Z Factor from the Chart .

7.Convert the different in mass convert into volume by multiply by Z factor.

Different in Mass = 

Weight of the cup after filled the distilled water. - Empty weight of the Specific gravity cup

    

Second Find the Density of the Distilled water

1.Find the Mass of the Water


2.Find the Volume of distilled water.


3.Density = Mass / Volume

Mass and density is getting from the Volume Section.

   Specific Gravity = Calculated density / Density of distilled water at same temperature


Below One Example to Show how to find the Specific Gravity

Empty Weight of Specific Gravity Cup = 145.874 g

Weight of cup after fill the Distilled water = 230.782 g

Temperature of Distilled Water  = 22 degree Celsius

Atmospheric Pressure = 1008.8 mbar

Z Factor  = 1.0033 µl/mg


Difference in Weight  = 230.782-145.874

                                   =84.908 g

Calculated Volume = 84.908*1008.8

                                  =85.188196 ml



Density = Mass/Volume

             =84.908/85.188196

            =0.99671 g/ml

Convert ml to centimeter cube




Specific Gravity = Density of object / Density of water at same temperature

Density of the Object =0.9967 g/ml 

Here the density is calculated at 22 degree Celsius.

Density of the water at 22 degree Celsius = 0.99777 g/ml 

 Specific Gravity = 0.9967 / 0.99777

                            =0.9989

 

Specific gravity calculator
Specific Gravity Calculator




if You want this excel file please comment in the comment box.




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