A Servo-Controlled Voltage Stabilizer is a sophisticated device that automatically corrects voltage fluctuations to provide a steady and precise output. Unlike older, relay-based stabilizers that adjust voltage in fixed steps, a servo stabilizer uses a servomotor to smoothly and continuously regulate a variable transformer. This mechanism allows for highly accurate voltage correction, often within a narrow tolerance of ±1%. This level of precision is crucial for protecting sensitive and expensive equipment, such as CNC machines, medical devices, and laboratory instruments, from damage caused by voltage sags and surges. The stabilizer's ability to maintain a consistent power supply makes it a vital component in industrial and commercial settings where power quality is paramount for operational reliability and equipment longevity.