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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HOW TO CONSTRUCT A GAUGE BLOCK STACK

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1. For getting the required length select a possible a few gauge blocks.
2. First select a least significant gauge block, then work back through more significant digits until the required length is attained.
3. Reduce the wear as much as possible, don't always use the same gauge blocks.

How to create a gauge block  Stack of  length 30.6785 mm

Use 88 block metric set

1.0005
1.008
1.17
7.5
20

Total 30.6785
  


How to create block Stack of 1.8761"

Using 81 block inch set

0.1001
0.126
0.65
1

Total 1.8761"

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