Answer Posted / antaratara ghosh

the reasons are:
1. Capacitors will absorb harmonics as their impedance
decreases and frequency increases, resulting in overheating
and increased stress that leads towards premature failure
2. Capacitors will resonate with the system impedance,
causing high voltage spikes and current upto 10 times the
normal level.
3. Switching of capacitor banks creates voltage transients
resulting overvoltage to loads and can damage solid state
equipments like variable frequency drives.

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