50 KVA Servo Voltage Stabilizer
Three Phase · ±1% Accuracy · 98% Efficiency
Voltapex supplies a rugged 50 kva servo voltage stabilizer for demanding production floors and critical processes. The oil‑immersed design runs continuously even in tough Indian grid conditions.
50 KVA Stabilizer – Understanding the Rating
A 50 KVA stabilizer delivers stable three‑phase output regardless of incoming voltage swings.
The rating denotes 50,000 Volt‑Amperes. With a typical power factor of 0.8, it supports roughly 40 kilowatts of active equipment. The design easily absorbs starting surges from motors and compressors.
Unlike static relay‑based devices, this kva unit uses a motor‑driven variable transformer. This approach provides smooth voltage correction without introducing waveform distortion or switching spikes.
Our oil‑cooled construction places all major components inside a tank of premium insulating oil. The fluid carries heat away and offers strong dielectric isolation, ensuring years of dependable service with only occasional inspection.
Where a 50 KVA Stabilizer Fits Best
- CNC Machine Clusters: Steady voltage for servo drives and control panels, preventing positioning errors.
- Printing & Packaging Lines: Guards multicolor presses where speed changes ruin print quality.
- Diagnostic Centres: Clean power for MRI chillers, CT scanners, and lab automation.
- Solar Power Plants: Regulates inverter output and shields against grid feedback fluctuations.
- Textile & Processing Units: Manages power for ring frames, looms, and heavy motor loads.
- Cold Storage & HVAC: Prevents compressor stalling and motor overheating during brownouts.
For smaller setups, see our 30 KVA servo stabilizer. For larger plant‑wide coverage, explore the 75 KVA industrial model.
Notable Features of the 50 KVA Servo Voltage Stabilizer
- DSP Control Logic: Fast digital processing ensures precise servo motor positioning and quick response.
- Inrush Current Handling: Motor start‑ups cause no perceptible voltage drop.
- Oil‑Filled Transformer Tank: Superior heat dissipation and dielectric strength for round‑the‑clock duty.
- Pure Sine Wave Output: Continuous analog correction keeps waveform clean for sensitive electronics.
- Multi‑Tier Protection: Safeguards against over‑voltage, under‑voltage, phase loss, and short circuits.
- Broad Input Window: Operates reliably from 300V to 480V; custom ranges available for deeper sags.
- ±1% Output Precision: Maintains 415V within tight limits on all three phases.
- Continuous Duty Rated: Built for non‑stop operation at full load in ambient up to 50°C.
Technical Specifications
| Parameter | Specification |
|---|---|
| Rated Capacity | 50 KVA (50,000 VA) |
| Active Load Capability | 40 KW (at 0.8 PF) |
| Phase Configuration | Three Phase, Four Wire |
| Cooling Methodology | Oil Cooled (ONAN) |
| Input Voltage Range | 300V – 480V (Standard) / Wider ranges optional |
| Output Voltage | 415V AC ± 1% |
| Frequency | 50 Hz ± 5% |
| Efficiency | > 98% at Full Load |
| Correction Speed | 35 V per second |
| Protection Class | IP54 (Dust & Water Resistant) |
| Ambient Temperature | -5°C to 50°C |
| Approx. Dimensions (WxDxH) | 850 x 600 x 1300 mm |
| Approx. Weight | ~380 kg |
How the Servo Stabilizer Maintains Constant Voltage
This equipment relies on a closed‑loop feedback system. A sensing circuit continuously samples the incoming three‑phase supply.
If the voltage strays from the 415V reference, the controller activates a synchronous motor. Through a gear assembly, the motor shifts the carbon brush along the winding of a variable transformer (variac).
Depending on the input condition, the brush movement either adds voltage (boost) during low input or subtracts voltage (buck) during high input. The adjusted voltage feeds the primary of the main buck‑boost transformer, which delivers the corrected 415V to the load.
Both the variac and the main transformer sit fully submerged in dielectric fluid inside the tank. The oil draws heat away from the windings and provides strong insulation. This allows the 100 kva stabilizer platform's smaller sibling to manage high power demands continuously without thermal issues.
Why Customers Choose Voltapex Power
In‑House Production
We manufacture transformer cores, windings, and tanks under one roof. This vertical control ensures consistent quality and timely deliveries across India.
Stringent Factory Trials
Each unit undergoes full‑load heat runs and oil breakdown voltage (BDV) testing to confirm insulation integrity before dispatch.
Lifetime Service Support
We provide comprehensive after‑sales assistance with a network of engineers ready for commissioning and maintenance.
Operational Advantages of a 50 KVA Stabilizer
Less Production Stoppage
Eliminates nuisance tripping of VFDs and PLCs caused by erratic voltage. Your lines keep moving.
Longer Machinery Life
Prevents overheating and insulation wear in motors—the primary cause of industrial motor failures.
Lower Energy Bills
Optimized voltage reduces iron losses in motors and transformers, trimming overall power consumption.
Better Product Quality
Steady spindle speeds and uniform heating yield consistent output with less material waste.
Ideal 50 KVA Stabilizer for CNC and Industrial Loads
High‑speed machining in Indian manufacturing demands reliable power. Our 50 KVA model is tuned for the dynamic load profile of CNC machining centres. When a spindle ramps up or a tool change occurs, current draw spikes sharply. Relay‑based stabilizers often cannot correct fast enough, leading to alarms or servo drive errors.
The Voltapex oil cooled servo voltage stabilizer mechanism provides high inrush capacity and smooth correction without sine wave distortion. This is vital for the switch‑mode power supplies inside CNC controllers. Moreover, the oil‑cooled design keeps the unit at full capacity even in ambient temperatures above 40°C, without noisy cooling fans. For shops upgrading from manual to CNC automation, this unit provides essential protection.
50 KVA Servo Stabilizer Price
Voltapex Power offers the 50 kva servo stabilizer price range from ₹95,000 to ₹1,85,000. The exact 50 kva servo voltage stabilizer cost depends on input voltage range customization, protection features, and accessories. For a precise quote, call us or send a WhatsApp message.
We provide high-quality oil-cooled servo stabilizers that deliver reliable voltage regulation for critical loads. Our pricing is competitive without compromising on components or testing standards.
Common Questions Answered
Secure Your Production Line with Stable Voltage
Contact Voltapex Power for a technical consultation and customized quote for the 50 KVA Oil Cooled Stabilizer.