Capacitor reactive power and frequency

How do you calculate reactive power of a capacitor?

The squiggly thing is a lowercase phi, the cos of that represents the power factor. From impedance of capacitor Zc = 1 jωC Z c = 1 j ω C , then the reactance is Xc = 1 ωC X c = 1 ω C and reactive power is Q = I2X = U2 X = I2 ωC Q = I 2 X = U 2 X = I 2 ω C C = I2 ωQ C = I 2 ω Q

Are capacitors and inductors reactive?

Capacitors and Inductors are reactive. They store power in their fields (electric and magnetic). For 1/4 of the ac waveform, power is consumed by the reactive device as the field is formed. But the next quarter waveform, the electric or magnetic field collapses and energy is returned to the source. Same for last two quarters, but opposite polarity.

How does capacitive reactance change with frequency?

Capacitive reactance (X C) falls with an increase in frequency. Inductive reactance (X L) rises with an increase in frequency. In the RC Network tutorial we saw that when a DC voltage is applied to a capacitor, the capacitor itself draws a charging current from the supply and charges up to a value equal to the applied voltage.

What is the capacitive reactance of a 220nf capacitor at 1Mhz?

At very high frequencies such as 1Mhz, the capacitive reactance of a 220nF capacitor is just 0.72Ω, giving the effect of a short circuit.

How does frequency affect a capacitor?

As the frequency increases, the capacitor passes more charge across the plates in a given time, resulting in a greater current flow through the capacitor. This appears as if the internal impedance of the capacitor has decreased.

What is the maximum reactive power of a shunt capacitor bank?

This discharge may cause a rupture of the failed unit with possible damage to the rest of the bank. To prevent it, the maximum reactive power of one series section should not be higher than 4,650 kvar at a rated voltage and 60 Hz frequency. Refer to IEEE Std. C37.99-1990 “IEEE Guide for Protection of Shunt Capacitor Banks 1.