Stable voltage, protected equipment, uninterrupted production.
Voltage fluctuations are a persistent challenge in Indian power distribution input voltages routinely vary between 170V and 270V, well outside the safe operating range for most industrial and commercial equipment. A Mercra Servo Stabilizer continuously corrects these fluctuations in real time, delivering a regulated output that protects connected loads and keeps operations running.
The stabilizer uses a servo motor-driven variac in combination with a precision buck-boost transformer. As the control circuit senses any deviation from the set output voltage, it drives the servo motor to compensate rapidly and continuously so that sensitive equipment always receives clean, stable power
“Mercra’s servo stabilizer transformers are built for the demanding correction cycles of servo-controlled architectures precision-wound, thermally managed, and tested for continuous operation.“
Engineered for demanding operating conditions
Output voltage maintained at ±1% even under wide input fluctuations from 170V to 270V
Servo motor correction responds within milliseconds to keep sensitive loads protected
98%+ efficiency rating — no consumables, low losses, measurable energy savings
Overload, short-circuit, high voltage and low voltage protection as standard
Microprocessor-controlled sensing circuit corrects continuously, not in steps
Available from 1 kVA to 3000 kVA for single-phase and three-phase configurations
1 kVA to 50 kVA
3 kVA to 1000 kVA
For power requirements above 1000 kVA, Mercra offers customized solutions under its Distribution Transformer category, based on application needs and power distribution architecture
Continuous closed-loop voltage correction
The sensing circuit continuously monitors input voltage and feeds real-time data to the microprocessor-based control board.
The microprocessor compares live input voltage against the programmed reference output and calculates the correction required
The motor driver circuit moves the servo motor across the autotransformer (variac) winding to increase or decrease voltage accordingly
The buck-boost transformer adds or subtracts the corrective voltage, delivering the regulated output to the connected load
Where Mercra servo stabilizers are deployed
Mercra's engineers will assess your load profile and recommend the right configuration
Our sales and engineering teams support product selection, customization, quotations, documentation, and after-sales service.