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Commercial Enquiry :
+919373336340 | +919822407189
sales@enertechups.com
Customer Care & Support: +919373679255 support@enertechups.com
Careers: +919075088292 recruitment@enertechups.com
EnerTech’s Three Phase Servo Stabilizer delivers industrial-grade voltage stability with ±0.5% precision for critical manufacturing and commercial operations. Available in air-cooled (3-250KVA) and oil-cooled (25-1000KVA) variants, our servo stabilizers protect heavy machinery, production lines, and sensitive equipment from voltage fluctuations. With 35+ years of engineering excellence and 35,000+ successful installations, trust EnerTech to power your industrial success.
| Parameter | Air-Cooled (3–250 KVA) | Oil-Cooled (25–1000 KVA) |
|---|---|---|
| Capacity Range | 3 KVA to 250 KVA | 25 KVA to 1000 KVA |
| Phase | Three Phase | Three Phase |
| Construction Type | Balanced / Unbalanced | Balanced / Unbalanced |
| Input Voltage Range |
360V–460V (Standard) 340V–480V (Wide) 300V–500V (Custom) |
360V–460V (Standard) 340V–480V (Wide) 250V–500V (Custom) |
| Output Voltage | 415V AC ±1% (Adjustable ±6%) | 415V AC ±1% (Adjustable ±6%) |
| Output Voltage Accuracy | ±0.5% (Ultra-precision) | ±0.5% (Ultra-precision) |
| Frequency | 50 Hz ±5% | 50 Hz ±5% |
| Voltage Correction Rate | 40–60V per second | 50–70V per second |
| Response Time | < 20 milliseconds | < 15 milliseconds |
| Cooling Type | Natural / Forced Air Cooling | Oil Cooled (BS:335 Standard Oil) |
| Efficiency | ≥97% at rated load | ≥98% at rated load |
| Waveform | Pure Sinusoidal (THD <3%) | Pure Sinusoidal (THD <2%) |
In industrial and commercial environments, voltage fluctuations aren’t just an inconvenience—they’re a direct threat to productivity, equipment longevity, and your bottom line. A single voltage spike can damage expensive CNC machines, disrupt production lines, corrupt data centers, and cause thousands in losses within seconds.
EnerTech’s Three Phase Servo Stabilizer (3-1000KVA) is engineered specifically for demanding industrial applications where power stability is non-negotiable. Our stabilizers handle both balanced and unbalanced loads, correct severe voltage variations, and operate flawlessly even in the harshest power conditions across India.
Whether you’re running a small manufacturing unit with 3KVA requirements or a large industrial plant requiring 1000KVA capacity, our range of air-cooled and oil-cooled servo stabilizers provides the perfect solution. With microcontroller-based intelligence, IoT connectivity, and comprehensive protection systems, we ensure your operations run 24/7 without voltage-related interruptions.
Trusted by leading industries across manufacturing, pharmaceuticals, textiles, petrochemicals, cold storage, and more—EnerTech powers India’s industrial growth.
Speed of Operation: The entire correction cycle happens in less than 20 milliseconds, ensuring your three-phase equipment receives consistently stable power without any perceptible lag or interruption.
Advanced microcontroller continuously monitors all three phase voltages (R, Y, B) Simultaneously tracks output voltage, current, frequency, and power factor Sampling rate: 1000 times per second for instant detection
Controller compares actual phase voltages with reference set point (415V) Calculates deviation for each phase (balanced) or independently (unbalanced) Determines required correction magnitude and direction
Microprocessor generates error signals proportional to voltage deviation Calculates optimal servo motor rotation speed based on deviation magnitude Determines clockwise or anti-clockwise rotation direction
Variable-speed high-torque AC servo motor receives control signals Motor rotates at speed proportional to voltage deviation (faster for larger deviations) Direction of rotation determined by whether voltage needs increase or decrease
Servo motor shaft connected to variable auto-transformer (variac) through gear mechanism Carbon brushes move across transformer windings Number of active winding turns increases (boost) or decreases (buck) voltage
Adjusted voltage from auto-transformer feeds into buck-boost transformer Series transformer adds or subtracts voltage to/from main supply Three-phase correction maintains phase relationships
Corrected three-phase voltage maintains at 415V ±0.5% on all three phases Pure sinusoidal waveform without distortion Balanced phase voltages regardless of input imbalance
Output voltage continuously fed back to controller Closed-loop system ensures continuous real-time correction Entire cycle repeats at millisecond intervals
Air-Cooled & Oil-Cooled Variants
Versatile Three-Phase Configuration
Seamless DG Set Integration
Multi-Layer Safety for Equipment & Personnel
We manufacture both air-cooled and oil-cooled variants in-house with the same quality standards. Our engineers conduct free site assessments to recommend the optimal cooling technology based on your capacity, environment, and application needs.
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A: Balanced type uses a single servo motor to control all three phases together—suitable for applications where input supply and load are balanced across all three phases. Unbalanced type uses three independent servo motors (one per phase) for independent correction—ideal for unbalanced loads, mixed single-phase and three-phase equipment, or areas with chronically unbalanced input supply. Most modern industrial applications benefit from unbalanced type due to varying load patterns. Our engineers provide free load analysis to recommend the optimal configuration.
A: Air-cooled stabilizers are suitable for capacities up to 100 KVA, indoor installations with good ventilation, and operations under 20-22 hours per day. Oil-cooled stabilizers are recommended for capacities 100 KVA and above, 24/7 continuous operation, high-temperature environments, and when maximum reliability is critical. Oil cooling provides superior heat dissipation, longer component life (15-20 years vs 10-15 years), and better efficiency (98% vs 97%).
A: Absolutely! Our servo stabilizers feature special electronic circuitry specifically designed for generator compatibility. They handle frequency variations (±5%), rapid load changes, voltage transients, and power factor variations typical of DG set operation. This makes them perfect for facilities with backup generator systems. We've successfully installed thousands of units working seamlessly with generators across industries.
A: Our standard range handles 360V-460V input. Wide range models operate from 340V-480V. For extremely poor power areas, we offer custom extra-wide range models (300V-500V or 250V-500V). All models maintain stable 415V ±1% output regardless of input fluctuations. We can customize input/output specifications based on your specific requirements—consult our engineering team for tailored solutions.
A: Calculate total connected load in kW across all three phases, add 20-25% safety margin, and convert to KVA by dividing by power factor (typically 0.8 for industrial loads). Example: 80 kW load ÷ 0.8 PF = 100 kVA, plus 25% safety = 125 KVA recommended capacity. However, we strongly recommend our free load analysis service where our engineers assess your actual requirements, load patterns, future expansion plans, and recommend optimal capacity and configuration.
A: Air-cooled units: 10-15 years with annual maintenance (brush inspection, cleaning, testing). Oil-cooled units: 15-20 years with semi-annual maintenance (oil testing, brush inspection) and annual comprehensive service. Maintenance is minimal—quarterly visual inspections, annual detailed service. We offer AMC contracts for hassle-free maintenance with scheduled preventive service, priority support, and spare parts discounts.
A: Our servo stabilizers respond in less than 20 milliseconds to voltage fluctuations. The correction rate is 40-70V per second depending on capacity. This ultra-fast response ensures your equipment never experiences voltage outside the safe operating range, even during rapid fluctuations. The continuous servo mechanism provides smooth, stepless correction without jerks or delays typical of relay-based systems.
A: Yes! Our IoT-enabled servo stabilizers support remote monitoring through web portal or mobile app. You can monitor voltage, current, frequency, power factor, and system status for multiple stabilizers from a single dashboard. Receive instant alerts via WhatsApp/SMS/Email for any abnormal conditions. Historical data logging enables trend analysis and predictive maintenance. This is particularly valuable for facilities with multiple stabilizers or multi-location operations.
A: Comprehensive multi-layer protection: Phase Reversal Protection, Single Phasing Protection (critical for three-phase motors), Short Circuit Protection (MCCB), Overload Protection (120% for 10 min, then trip), High/Low Voltage Cutoff (user-settable), Surge Control Protection, Neutral Failure Protection, Phase Missing/Reversal Alarms. All protection settings are configurable based on your equipment requirements. This comprehensive protection ecosystem safeguards your expensive industrial equipment investment.
A: Absolutely! Customization is one of our core strengths. We customize: Input voltage ranges (any specification from 250-500V), Output voltages (360V, 380V, 400V, 415V, 440V), Special enclosures (weather-proof IP54/IP65, corrosion-resistant, ATEX-compliant for hazardous areas), Custom control panels with specific instrumentation, Integration with SCADA/automation systems, Multi-stabilizer synchronized systems for large loads, Export voltage/frequency specifications. Our in-house R&D and manufacturing enables us to deliver custom solutions within 3-4 weeks.
A: Our comprehensive 4-phase process: (1) Pre-Installation: Free site survey, load analysis, custom design, detailed proposal. (2) Installation: Site preparation guidance, equipment delivery, professional electrical installation by certified engineers. (3) Testing & Commissioning: Pre-commissioning checks, load testing at various levels, protection testing, IoT configuration, performance documentation. (4) Training & Handover: Operator training, documentation, warranty activation. Entire process typically takes 2-4 weeks depending on capacity and site conditions.
A: Standard warranty: 18 months comprehensive warranty covering manufacturing defects and component failures. Extended warranty options available up to 5 years. Post-warranty: Lifetime support for spare parts and service through 100+ service centers pan-India. 24/7 technical helpline with 24-48 hour on-site response. AMC contracts available for scheduled maintenance, priority support, and spare parts discounts. Remote diagnostics for IoT-enabled units reduces service visits and downtime.
A: Very efficient! Air-cooled units operate at 97% efficiency, oil-cooled at 98% efficiency. This means only 2-3% energy loss during voltage regulation. For a 100 KVA stabilizer operating at 80% load, energy loss is just 1.6-2.4 kW. Compared to the energy waste and equipment damage prevented, servo stabilizers provide significant net energy savings. Many customers report 12-18% reduction in overall facility energy consumption due to improved equipment efficiency and power quality.
A: Air-cooled units are designed for indoor installation in controlled environments with proper ventilation. Oil-cooled units can be installed outdoors with proper weatherproof enclosures (IP54 or IP65 rating). We provide custom outdoor enclosures with rain protection, sun shades, ventilation, and corrosion-resistant coating for coastal or harsh environments. Proper enclosure design is critical for outdoor installations—consult our engineers for site-specific recommendations.
A: We offer the best value proposition in the industry—direct manufacturer pricing without middleman markup, transparent quotations with detailed specs, volume discounts for multiple units, and competitive TCO (Total Cost of Ownership) over 15-20 year lifespan. While initial cost might be comparable or slightly higher than generic brands, superior quality, longer lifespan, minimal maintenance, and comprehensive support make EnerTech stabilizers significantly more cost-effective over the product lifetime. Most customers achieve ROI within 12-24 months through downtime elimination and equipment protection alone.
