Three Phase
Servo Voltage
Stabilizers
40 KVA to 500 KVA · Oil & Air Cooled · IS 9815 Certified
Voltapex Power is one of India's leading servo stabilizer manufacturers. Our complete range of three phase servo voltage stabilizers delivers ±1% regulated output for large factories, hospitals, data centres, and industrial complexes — built to IS 9815 and IEC 60076 standards.
Servo Stabilizer Capacity Calculator
Enter your load details — we automatically apply a 20% safety margin to recommend the correct three phase servo voltage stabilizer capacity.
Three Phase Servo Voltage Stabilizers 40 KVA to 500 KVA
As a leading servo voltage stabilizer manufacturer in India, Voltapex offers a comprehensive range of three phase servo stabilizers for every industrial and commercial requirement. All units are built to IS 9815 standards with IS 335 mineral oil insulation (oil-cooled models) and individual phase correction.
40 KVA 3-Phase Servo Stabilizer
Ideal for small workshops, retail complexes, and light industrial setups needing reliable three phase voltage regulation.
- Input Range: 300V–480V
- Voltage Accuracy: ±1%
- Efficiency: 98%
- Cooling: Air Cooled
- Max Load: 32 KW
- Warranty: 2 Years
50 KVA Servo Stabilizer
Suits medium-scale manufacturing units and commercial buildings with balanced three phase loads.
- Input Range: 300V–480V
- Voltage Accuracy: ±1%
- Efficiency: 98%
- Digital Display
- Max Load: 40 KW
- Warranty: 2 Years
60 KVA Oil Cooled Stabilizer
Oil-cooled three phase servo controlled voltage stabilizer for growing industrial plants and medium manufacturing facilities.
- Input Range: 300V–480V
- Voltage Accuracy: ±1%
- Efficiency: 98.2%
- Oil Cooled (ONAN)
- Max Load: 48 KW
- Warranty: 3 Years
75 KVA Voltage Stabilizer
Robust power protection for mid-sized manufacturing and processing units with fluctuating loads.
- Input Range: 280V–480V
- Voltage Accuracy: ±1%
- Efficiency: 98.3%
- Digital Controls
- Max Load: 60 KW
- Warranty: 3 Years
100 KVA 3-Phase Servo Stabilizer
Enterprise-grade oil-cooled servo voltage stabilizer for large factories, hospitals, and multi-line production facilities.
- Input Range: 280V–480V
- Voltage Accuracy: ±1%
- Efficiency: 98.5%
- Oil Cooled ONAN, IP54
- Max Load: 80 KW
- Warranty: 3 Years
150 KVA Servo Stabilizer
Heavy-duty protection for large industrial operations, textile mills, and multi-line manufacturing plants.
- Input Range: 280V–480V
- Voltage Accuracy: ±1%
- Efficiency: 98.5%
- Oil Cooled Standard
- Max Load: 120 KW
- Warranty: 3 Years
200 KVA Servo Stabilizer
For heavy machinery, steel processing, large manufacturing plants, and industrial complexes requiring centralised voltage regulation.
- Input Range: 280V–480V
- Voltage Accuracy: ±1%
- Efficiency: 98.5%
- Multiple Cooling Options
- Max Load: 160 KW
- Warranty: 4 Years
250 KVA Servo Stabilizer
High-capacity three phase servo stabilizer for large industrial complexes, cold storage facilities, and automotive plants.
- Input Range: 280V–480V
- Voltage Accuracy: ±1%
- Efficiency: 98.5%
- Oil Cooled Standard
- Max Load: 200 KW
- Warranty: 4 Years
300 KVA Servo Voltage Stabilizer
Advanced three phase servo controlled voltage stabilizer for large-scale industrial operations and smart manufacturing.
- Input Range: 250V–480V
- Voltage Accuracy: ±1%
- Efficiency: 98.5%
- Oil Cooled Construction
- Max Load: 240 KW
- Warranty: 4 Years
500 KVA Servo Voltage Stabilizer
Maximum capacity servo stabilizer for large industrial complexes, data centres, and high-rise commercial developments.
- Input Range: 250V–480V
- Voltage Accuracy: ±1%
- Efficiency: 98.5%
- Forced Oil Cooling
- Max Load: 400 KW
- Warranty: 5 Years
Why Choose Voltapex as Your Servo Stabilizer Manufacturer?
As a dedicated voltage stabilizer manufacturer in India, Voltapex controls every stage of production — from transformer core winding and oil tank fabrication to final testing. Every three phase servo voltage stabilizer ships with complete factory test documentation.
In-House Manufacturing
We wind our own transformer cores, fabricate oil tanks, and assemble every unit in-house. No outsourced critical components — full quality accountability on every servo stabilizer we produce.
Rigorous Factory Testing
Every unit undergoes a full-load heat run, oil BDV check, insulation resistance measurement, and performance verification. You receive a tested, data-backed three phase servo controlled voltage stabilizer.
Custom Engineering
Non-standard input ranges (240V–480V), SCADA ports, hazardous area enclosures, and special protection grades — all documented to IEC standards and available on request.
Safe Transport & Commissioning
Oil-filled servo stabilizers require specialist handling. Voltapex manages oil draining, secure heavy-lift packing, oil refilling, and on-site commissioning by experienced engineers.
Pan-India Service Support
Annual Maintenance Contracts (AMC) with guaranteed response times are available across India, keeping your three phase servo voltage stabilizer in peak condition throughout its service life.
IS 9815 & IEC Certified
All Voltapex servo stabilizers comply with IS 9815 and IEC 60076 standards with CE marking available for export, satisfying factory inspector and insurance audit requirements.
About Three Phase Servo Voltage Stabilizers
What Is a Three Phase Servo Controlled Voltage Stabilizer?
A three phase servo voltage stabilizer is an automatic voltage regulator that continuously monitors all three supply phases and corrects deviations within milliseconds. At the core of every unit is a precision servo motor that drives a carbon brush arm along a continuously variable transformer (variac), adding or subtracting voltage to maintain a rock-steady 415 V ±1% output.
Unlike static relay-based stabilizers, the servo mechanism delivers stepless correction with zero waveform distortion — making it the preferred choice of servo stabilizer manufacturers in India for protecting CNC machines, injection moulding equipment, printing presses, and hospital imaging systems.
Why Three Phase?
Industrial loads above 30 KVA require three phase power distribution for efficiency, balanced load sharing, and compatibility with three-phase motors. A three phase servo stabilizer addresses each phase individually, which means unbalanced loads — common in mixed-machine factory environments — are corrected without cross-phase interaction.
Air Cooled vs Oil Cooled Servo Stabilizers
For capacities up to 75–100 KVA in relatively clean environments, air-cooled three phase servo stabilizers are cost-effective and compact. From 100 KVA upwards — and in dusty or high-ambient-temperature industrial sites — oil-cooled servo controlled voltage stabilizers are strongly recommended. Submerging the variac and transformer in IS 335 mineral oil provides superior thermal mass, dielectric isolation, and design lives exceeding 20 years with minimal maintenance.
Key Industries Served
As experienced voltage stabilizer manufacturers, Voltapex supplies three phase servo stabilizers to automotive component plants, textile mills, plastic processing units, pharmaceutical manufacturers, cold storage facilities, multi-specialty hospitals, data centres, and large commercial complexes across India — wherever voltage quality directly impacts productivity and equipment longevity.
Frequently Asked Questions
Power Your Plant
With Total Confidence
Contact Voltapex — leading servo stabilizer manufacturers in India — for a site evaluation and detailed quotation.