RELAY or SERVO… which is which??? Leave a comment

Have you ever wondered how stabilizers work? No, it’s not rocket science. AVRs (Automatic Voltage regulators) work dynamically by regulating the volts supplied by the electric grid in such a way that it will deliver the required amount of volts needed by the household or company if the incoming volts are within what the AVR can regulate.

Stabilizers have become an entity of great significance to every household and company to help safeguard electrical appliances from the fluctuating current coming in from the national grid.

The manufacture of these stabilizers started with the use of an electromagnetic relay system that helps in selecting the right part to adjust the incoming voltage. This method came with its strength and weakness. Later, another method was designed with the use of an electronic circuit for adjustment purposes. This method also comes with a few pros and cons.

  1. The Relay voltage Stabilizer/AVRs

This type of stabilizer is mostly used for low-weight appliances in homes, offices, and low-cost homes. The technology comes with certain limitations which include low voltage correction speed, less durability, less reliability, among other issues in the stabilizer technology. This technology attempts to resolve the accuracy of output and the delay time in the relay technology of stabilizers. It comes with a ±10% output voltage accuracy and a low-voltage correction speed of a stabilizer that is more reliable.

2. The Servo voltage stabilizer/AVRs

The Servo voltage stabilizer consists of the servo motor, Buck-Boost transformer (BBT), and Autotransformer among other elements. The voltage that comes out of the stabilizer is the voltage across the primary BBT and the other end is connected to the shaft of the Servo motor. It is mainly used for high output voltage accuracy, usually, ±1% with input voltage changes up to ± 50%. The advantages of servo stabilizers include higher correction speed, high precision of stabilized output, the capability of withstanding inrush currents, and most importantly the high reliability.

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