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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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EXPANDED FORM OF BRINELL HARDNESS SCALE - HOW TO READ THE BRINELL HARDNESS SCALE

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BRINELL HARDESS SCALE REPRASENTATION WW HBW XX/YY/ZZ 350 HBW 5/750/10   WW : Brinell Hardness Numbers shall be followed by the symbol HBW , XX:.Diameter of the ball ,mm YY :Test force ,kgf ZZ:Applied Force dwell time,s   READING METHOD OF BRINELL HARDNESS SCALE  Brinell Hardness Scale Expanded From of Hardness Scale 350 HBW 5/750 Brinell Hardness of 350 determined with a ball of 5mm diameter and with a test force of  750 kgf applied for 10s to 15 s 600 HBW 1/30/20 Brinell Hardness of 600 determined with a ball of 1 mm and with a test force of 30 kgf of  20s   Brinell Hardness Number is calculated Brinell Hardness Number A number, which is proportional to the quotient obtained by dividing the test force by the curved surface of the indentation which is assumed to be spherical and of the diameter of the ball How to find the Hardness Number (HBW) Brinell Hardnes...
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