AC Static Voltage Regulators come into existence from electronical elements so they dont contain mechanical parts.Because of this, their life is infinite and they dont need care. Much more important thing is, they put in order the voltage 56 times faster than servo controlled regulators. Voltage regulation can occour in very short time like 20 milisecond by tristor.
Tristors are very resistant elements against to high and instantaneous currents. Because of these features,they reply the high current loads.
Functions like voltage changes, extreme loads, overload voltage and phase stability are controlled from one center by digital technology.