3 Phase Automatic Voltage Regulator, there is an independent phase controlled unit for each of the three phases separately. (essentially) to check there are 3 number of Single Phase Servo Stabilizer in one three phase stabilizer.
A 10 KVA Variac Type Servo Stabilizer is a type of servo-controlled voltage stabilizer designed to maintain a stable output voltage, particularly for sensitive equipment. The 10 KVA rating indicates that the stabilizer can handle loads up to 10 kilovolt-amperes (KVA) of apparent power. The Variac term refers to a variable transformer used in the stabilizer to provide continuous and precise voltage regulation by adjusting the output voltage in response to fluctuations in the incoming supply voltage.