100 KVA
Servo Voltage
Stabilizer
Three Phase · Oil Cooled · ±1% Regulation · 98.5% Efficiency
Voltapex Power is one of India's leading servo stabilizer manufacturers. Our 100 KVA oil cooled servo voltage stabilizer is engineered for large factories, industrial plants, and high-demand commercial facilities that cannot afford voltage-related electrical surge protector.
What Is a 100 KVA Servo Stabilizer?
A 100 KVA servo voltage stabilizer is an industrial-grade automatic voltage regulator that delivers rock-steady output power to entire factory floors or large commercial complexes. The rating of 100,000 Volt-Amperes translates to approximately 80 KW of active load at the standard 0.8 power factor — enough to simultaneously power multiple production lines, CNC machining centres, and heavy-duty motors.
Unlike smaller machine-specific units, a 100 KVA servo controlled voltage stabilizer is designed for centralised, plant-wide voltage regulation. A single unit conditions power for an entire facility, simplifying electrical infrastructure, reducing maintenance touchpoints, and delivering consistent voltage to every connected machine.
In the oil-cooled construction, the variac winding and main buck-boost transformer are both submerged in premium-grade mineral insulating oil. This design provides exceptional thermal mass, strong dielectric isolation, and silent operation — making it the preferred choice of servo voltage stabilizer manufacturers for heavy industrial deployments worldwide.
As a stabilizer manufacturer in India with decades of experience, Voltapex Power builds every 100 KVA unit to IS 9815 and IEC 60076 standards, ensuring international-grade quality at competitive domestic pricing.
Quick Specs
Applications of the 100 KVA Servo Stabilizer electrical protection
Wherever large loads and fluctuating grid voltage coexist, the Voltapex 100 KVA servo controlled voltage stabilizer delivers the protection and precision your operations demand.
Large Manufacturing Plants
Guards multiple CNC machining cells, automated assembly lines, and entire production floors from damaging voltage fluctuations in a single centralised unit.
Heavy Engineering
Stabilises power for lathes, boring mills, planers, press brakes, and welding equipment — preventing motor burnouts and rejected components.
Printing & Packaging
Shields high-speed web presses, multi-colour offset machines, and lamination lines where even a brief voltage dip causes misregistration and costly waste.
Multi-Specialty Hospitals
Provides centralised power conditioning for MRI suites, CT scanners, surgical theatres, and ICUs — where voltage quality is a matter of patient safety electrical protection .
Cold Storage & Food Processing
Protects large compressor racks, blast freezers, and food processing machinery from the erratic voltage conditions common in industrial zones.
Solar Power Plants
Conditions output voltage from 80–100 KW inverter clusters before grid injection, ensuring compliance with distribution company requirements.
Commercial Complexes
Stabilises HVAC central plants, elevator banks, data server rooms, and common utilities across large malls, hotels, and office towers.
Research & Testing Labs
Delivers ultra-clean regulated power to environmental chambers, precision analytical instruments, and sensitive metrology equipment.
Textile Mills
Keeps high-speed looms, dyeing machines, and spinning lines running at rated speed — eliminating the fabric defects caused by low voltage conditions.
Need more capacity? View our 150 KVA oil cooled servo stabilizer. · Smaller requirements? See the 60 KVA oil cooled unit.
Key Features of the 100 KVA Servo Voltage Stabilizer
Industrial DSP Controller
A high-speed digital signal processor monitors all three input phases simultaneously and triggers corrective action within milliseconds, before sensitive equipment notices the disturbance.
Heavy-Duty Oil Immersed Tank
Both the variac and the buck-boost transformer are fully submerged in IS 335 / IEC 60296 mineral oil. The fluid provides superior cooling and dielectric insulation that extends component life beyond 20 years.
±1% Output Regulation
Regardless of the input voltage swinging between 300 V and 480 V, the output remains locked at 415 V ±1% across all three phases — meeting the tightest equipment tolerances.
High Motor Inrush Capacity
Specifically rated to handle 6–8× full-load starting currents from large induction motors without nuisance tripping or output voltage sag — critical for compressors, pumps, and machining spindles.
Zero Waveform Distortion
The servo mechanism adds or subtracts voltage without any switching. The output is a pure, distortion-free sine wave — identical in quality to an ideal utility supply.
Individual Phase Correction
Three independent regulation channels correct each phase separately. Unbalanced factory loads — a common reality in mixed-machine environments — are managed effectively without cross-phase interaction.
Comprehensive Protection Suite electrical protection
Overload, short circuit, over-voltage, under-voltage, phase failure, phase reversal, and thermal protection are all built in — providing multiple layers of defence for your connected equipment.
100% Continuous Duty Rating
Engineered to run at full rated load non-stop in ambient temperatures up to 45°C — the real-world summer conditions found inside Indian industrial sheds and factories.
Advanced Digital Metering
A front-panel display shows real-time input voltage, output voltage, load current per phase, frequency, and active fault codes — giving your electrical team complete operational visibility.
Remote Monitoring Ready
Potential-free alarm contacts allow integration with your factory's SCADA, BMS, or DCS — enabling centralised power monitoring without additional field instrumentation.
Technical Specifications
Complete technical parameters for the Voltapex 100 KVA three-phase oil cooled servo voltage stabilizer. All values are at rated conditions unless noted. Custom specifications are available on request.
| Parameter | Specification |
|---|---|
| Rated Capacity | 100 KVA (100,000 VA) Standard |
| Active Load Capacity | 80 KW at 0.8 Power Factor |
| Phase Configuration | Three Phase, Four Wire (Star / TN-S) |
| Cooling Type | Oil Cooled – ONAN (Oil Natural Air Natural) |
| Cooling Medium | Mineral Insulating Oil per IS 335 / IEC 60296 |
| Input Voltage Range (Standard) | 300 V – 480 V AC (Three Phase) |
| Input Voltage Range (Custom) | 280 V – 480 V | 240 V – 480 V (on request) |
| Output Voltage | 415 V AC ±1% (Line-to-Line) |
| Frequency | 50 Hz ±5% |
| Efficiency | >98.5% at Full Load |
| Correction Speed | 45 V per second |
| Response Time | 20 – 30 milliseconds |
| Protection Class (Enclosure) | IP54 – Dust and Splash Water Protected |
| Ambient Temperature Range | –5°C to +45°C |
| Insulation Class | Class H (rated to 180°C) |
| Input Current (per Phase) | ~140 A (at rated load) |
| Dimensions (W × D × H) | 1000 × 800 × 1500 mm (approx.) |
| Weight | ~680 kg (oil filled) |
| Standards Compliance | IS 9815, IEC 60076, CE Marked |
Dimensions and weight are indicative. Final drawings provided at order confirmation. Voltapex Power reserves the right to improve specifications without prior notice.
Working Principle of a Servo Voltage Stabilizer
The 100 KVA Voltapex unit uses a precision closed-loop electromechanical feedback system. Here is exactly what happens — from sensing to correction — in under 30 milliseconds.
Continuous Voltage Sensing
An electronic sensing circuit samples all three input phases many times per second. The moment voltage deviates from the 415 V target — up or down — the DSP controller calculates the precise correction needed.
Servo Motor Actuation
The controller activates a high-torque synchronous servo motor, which drives a gear assembly connected to the carbon brush arm on the variac (continuously variable autotransformer) winding.
Voltage Addition or Subtraction
Moving the brush arm across the variac winding either adds voltage (boost mode during low input) or subtracts voltage (buck mode during high input). Correction speed reaches 45 V per second.
Buck-Boost Transformer Output
The adjusted voltage feeds the primary of the main buck-boost transformer, which delivers a corrected, regulated 415 V output to all connected equipment.
Oil Cooling & Insulation
Inside the sealed tank, mineral oil carries heat away from the variac and transformer windings. The oil also provides dielectric insulation against dust, humidity, and electrical stress — enabling 20+ year service life with minimal maintenance.
Why Oil Cooling Matters at 100 KVA
At 100 KVA is designed for voltage stability in various places like Mills and industries, even 1.5% of power converted to heat equals 1,500 W of continuous thermal energy. Air-cooled designs must route this heat through large external radiators that are vulnerable to dust blockage — a common cause of catastrophic failure in Indian factories.
The oil-immersed design uses the thermal mass of approximately 180 litres of insulating fluid as a buffer. Temperature spikes are absorbed gradually, and heat dissipates safely through the tank walls and radiator fins — with no moving parts at risk of fouling.
The same oil that cools also insulates. Windings submerged in mineral oil can tolerate higher electrical stress than air-insulated counterparts — meaning the unit handles transient motor inrush currents without degrading insulation.
Why Choose Voltapex Power as Your Servo Stabilizer Manufacturer?
As a dedicated servo voltage stabilizer manufacturer in India, Voltapex Power controls every stage of production — from raw copper and grain-oriented silicon steel to the final tested unit. Here is what that means for you.
Integrated Manufacturing
We wind our own transformer cores, fabricate oil tanks, and assemble every unit in-house. There are no outsourced critical components — which means no quality surprises and no supply chain delays. Every Voltapex stabilizer leaves our factory as a single accountable product.
Rigorous Factory Testing
Before despatch, each 100 KVA unit undergoes a full-load heat run test, oil BDV (Breakdown Voltage) check, insulation resistance measurement, and performance verification across the entire input voltage range. You receive a tested, data-backed product.
Custom Engineering Capability
Standard input ranges may not suit every industrial site. Our engineering team routinely designs units with 240 V–480 V input ranges, OLTC tap positions, SCADA integration ports, and zone-II hazardous area enclosures — all documented to IEC standards.
Safe Transport & Commissioning
Oil-filled transformers require specialist handling. Voltapex manages oil draining, secure heavy-lift packing, and oil refilling at the site. Our engineers supervise installation, carry out pre-commissioning tests, and hand over with signed test reports.
Long-Term Service Support
Our after-sales team stocks brushes, carbon contacts, servo motors, and relay modules. Annual maintenance contracts (AMC) with guaranteed response times are available across India, ensuring your 100 KVA stabilizer stays in peak condition throughout its service life.
IS 9815 & IEC Certified
All Voltapex servo voltage stabilizers meet Indian Standard IS 9815 and the relevant IEC 60076 transformer standards. CE marking is available for export orders. Our compliance documentation satisfies factory inspector requirements and insurance audits.
Business Benefits of the 100 KVA Servo Stabilizer
Installing a centralised 100 KVA servo controlled voltage stabilizer from Voltapex Power delivers measurable improvements across production efficiency, equipment longevity, and energy costs.
Plant-Wide Protection in One Unit
A single centralised stabilizer guards your entire production floor, cutting failure points, reducing maintenance complexity, and eliminating the cost of individual machine-level regulators.
3–5% Energy Cost Reduction
Optimised voltage reduces resistive losses in motor windings across all connected machinery. Most industrial plants achieve a measurable 3–5% reduction in overall electricity consumption after installation.
Lower Maintenance & Repair Bills
Voltage-related damage — burned motor windings, failed contactor coils, blown VFD capacitors — is eliminated. Your maintenance team spends time on planned servicing rather than reactive breakdowns.
Consistent Product Quality
Stable voltage produces uniform motor speeds and steady thermal profiles. Heat-treating furnaces, injection moulding machines, and extrusion lines all deliver more consistent output — fewer rejects and customer complaints.
Extended Equipment Service Life
Eliminating voltage stress halts the cumulative insulation degradation that shortens motor and transformer life. Your capital investment in machines lasts significantly longer before requiring rewinding or replacement.
Room to Grow
The 100 KVA rating provides headroom for additional machinery, automation upgrades, and production capacity expansions — without revisiting your power quality infrastructure for years to come.
How to Choose the Best 100 KVA Servo Voltage Stabilizer for Your Factory
Step 1: Measure Your Total Connected Load
Add up the KVA ratings of all motors, HVAC units, lighting, and other equipment on the same feeder. Apply a demand factor (typically 0.7–0.8 for factories) and a future growth buffer of 20–25%. If your connected load reaches 70–80 KW, a 100 KVA servo stabilizer is the right fit.
Step 2: Log Your Input Voltage
Install a power quality analyser on your incoming feeder for at least one full week. Record minimum and maximum voltages across all shifts and seasons. Indian industrial feeders in many states routinely dip to 320 V or below during peak agricultural demand periods. Your stabilizer's input range must comfortably cover the lowest recorded voltage.
Step 3: Choose Oil Cooled for Heavy Duty
For loads above 50 KVA operating in hot or dusty industrial environments, oil-cooled design is almost always the superior choice. Air-cooled units at this capacity require large fans that can fail, and ventilation openings that admit conductive dust. Oil cooling eliminates both vulnerabilities.
Step 4: Verify the Servo Stabilizer Manufacturer's Credentials
When evaluating servo stabilizer manufacturers in India, look for IS 9815 certification, in-house transformer manufacturing capability, and documented factory test procedures. A reputable voltage stabilizer manufacturer will provide test reports — including oil BDV values, no-load losses, and full-load efficiency — for every unit.
Step 5: Plan Your Installation Site
A 100 KVA oil-filled stabilizer weighs approximately 680 kg. You will need a reinforced concrete plinth, a clear overhead area for maintenance access, and a minimum 1-metre service clearance on all four sides. Input cable sizing for 140 A per phase must be factored into your electrical design before equipment arrives.
Step 6: Calculate Your ROI
Estimate your current annual losses from voltage-related downtime, scrapped production, and premature equipment replacement. Most industrial customers recover the cost of a Voltapex 100 KVA servo stabilizer within 18–30 months through energy savings and reduced repair costs alone — making it one of the highest-ROI investments in your electrical infrastructure.
Frequently Asked Questions
Power Your Entire Plant
With Total Confidence
Contact Voltapex Power today for a site evaluation, load analysis, and a detailed quotation on the 100 KVA Oil Cooled Servo Voltage Stabilizer.