{| |- | capacitance of the capacitor is mentioned in KVAR. Formula : KVAR = KW*tan@ FOR tan@, First note the power factor & KW without connecting capacitor. The noted power factor is in cos@.Convert the cos@ value in tan@. for ex. If power factor is 0.6, KW = 200 cos@ = 0.6 cos-1 (0.6) = 53.1 tan (53.1) = 1.333 200*1.333 = 266.6 KVAR if you use 266 KVAR capacitor, Then the power factor improves to unity (1.000). |}
It depends upon at how much voltage level 400 kvar capacitor bank is used.
kvar
we can use the Out Put Capacitor Ex Kvar
When the capacitor kVAR rating is much larger than required, it can cause overcompensation in the power factor of the system, leading to an overvoltage condition. This can result in increased stress on the capacitor itself, as well as on other components in the system. It is important to properly size capacitors to avoid these issues.
The KVAR rating of a capacitor bank is typically determined by the reactive power (KVAR) demand of the system that needs to be compensated. This can be calculated by conducting a power factor study or analysis to determine the required amount of capacitive reactive power to bring the power factor to the desired level. The KVAR rating of the capacitor bank should be selected to meet this calculated KVAR demand.
Cable sizing is based on amperage of the load. The rating of the capacitor bank and the voltage at which it operated need to be stated to give an answer.
If the power factor is 0.7 the reactive power equals the real power, so the capacitor should be 1.5 kVAr. That is a reasonable estimate for a small induction motor.
Capacitors designed to be used for power-factor correction are rated in reactive volt amperes, rather than in farads.The reason for this is that in order to determine the necessary correction, a load's existing reactive volt amperes is first calculated, then the reactive volt amperes of the capacitor must be determined in order to achieve the required value of power factor. In other words, the capacitance (in farads) of the capacitor is irrelevant to the calculation.
KVAR Kilovolt-Ampere Reactive KVAR Kilovolt-Ampere-Reactance {| ! Acronym ! Definition | Formular for calculation of kvar |}
It depends on the power factor of the load, but for a load power factor of 0.7 on a 2000 kVA transformer the real power and reactive power are both 1400 kilo (watts and VAR). So a 1400 kVAR capacitor on the load would restore the power factor to 1, allowing 2000 kW to be drawn instead of only 1400 kW.
Kvar = Kilo Volt Amp Reactance.