A voltage regulator adjusts for changes in the incoming supply. Servo and relay designs do this in different ways. A fixed-ratio transformer changes voltage by a fixed ratio; an isolation transformer separates input and output electrically. Choose the function your equipment needs before comparing product labels.
What is the difference between an AC stabilizer and a mainline stabilizer?
An AC stabilizer serves a particular air conditioner and may include a compressor restart delay. A mainline stabilizer serves the selected circuits or combined loads downstream of it. Its rating must cover simultaneous demand and starting loads; a small AC unit should not be used to supply a whole home.
Which is better, servo or relay type AVR?
AVR means automatic voltage regulator. Servo and relay are two ways of doing that job. Choose servo when the required regulation and load justify it; choose relay when its stepped output stays within the appliance’s accepted limits. Neither is the right answer for every installation.
Which is better, an AVR or a transformer?
They solve different problems. An AVR adjusts for changing input voltage; an ordinary fixed-ratio transformer changes voltage by a fixed ratio. A transformer alone generally follows incoming variations. Some regulators include transformers, so compare the function you need rather than the labels.
What is the difference between a servo stabilizer and an isolation transformer?
A servo stabilizer regulates voltage. An isolation transformer has electrically separate primary and secondary windings and provides galvanic isolation. A standard servo stabilizer should not be assumed to provide isolation, and a plain isolation transformer should not be assumed to regulate voltage. Some installations need both.
Which type of transformer is best?
Choose from the job: isolation, voltage conversion, distribution or voltage correction. Then compare the rated load, insulation, temperature rise, losses, enclosure and installation conditions. An autotransformer shares a winding and does not provide galvanic isolation; a separate-winding isolation transformer does.
Compare servo stabilizers with static voltage regulators.
Servo regulators use motor-driven adjustment. Static regulators use power electronics and can correct voltage faster without the same moving contact mechanism. Compare actual response, overload capability, input range, cooling, maintenance and price for the same load. Neither replaces a UPS where backup is required.