Servo Stabilizer vs Isolation Transformer

What a servo stabilizer changes

A servo stabilizer adjusts output voltage as input voltage changes within its operating limits. Capacity, correction range, response, bypass and phase configuration depend on the selected model. It requires a live input supply and does not provide battery backup.

What an isolation transformer changes

Separate primary and secondary windings provide galvanic separation and a specified voltage ratio. Noise performance depends on the transformer construction, electrostatic screening, earthing and installation. Do not assume a noise attenuation value or active voltage regulation from the word isolation.

A practical selection example

A machine experiencing sustained low mains voltage needs a voltage investigation and possibly regulation. Equipment requiring supply separation needs an isolation and earthing design. Where both needs exist, review a combined solution with the equipment supplier rather than treating either device as a universal cure.

Information required for selection

Provide measured voltage variation, load kVA, starting currents, primary and secondary voltages, frequency, phases and equipment earthing requirements. Obtain model-specific data and confirm protection and installation arrangements.

Frequently asked questions

Does an isolation transformer stabilize the supply voltage?

A conventional isolation transformer provides electrical separation and a specified voltage ratio. It does not actively correct changing input voltage like a servo stabilizer.

Are the examples a GEESYS product specification?

No. Worked examples explain selection principles. Use the selected product datasheet and approved project design for actual ratings and installation requirements.

Related GEESYS products

• Servo Controlled Voltage Stabilizer
• Isolation Transformers