A DVR is a power electronic device that protects sensitive equipment by dynamically correcting voltage sags, swells, and flickers in an electrical system.
Dynamic Voltage Regulators
Dynamic Voltage Regulators – Stable Power, Maximum Uptime
Power fluctuations can cause costly downtime, equipment damage, and productivity loss. The PurityElec Dynamic Voltage Regulator (DVR) is designed to deliver instant, precise voltage correction for sensitive and mission-critical systems. By compensating for voltage sags, surges, and unbalance in real time, our DVR ensures continuous, high-quality power — even in the most unstable grid conditions.
Key Features
• Ultra-Fast Response – Corrects voltage fluctuations within milliseconds.
• Wide Compensation Range – Protects against sags, swells, and phase imbalance.
• High Efficiency – Minimal power losses during operation.
• Robust Design – Built for industrial, commercial, and utility-grade applications.
• Scalable Solutions – Available in multiple ratings to suit diverse load requirements.
• Low Maintenance – Advanced solid-state components ensure long service life.
Applications
• Manufacturing plants and process industries
• Data centers and IT facilities
• Commercial complexes and malls
• Hospitals and healthcare equipment
• Utility and substation protection
• High-end residential power backup
| Technical Specifications | |
|---|---|
| Capacity Range | 50 kVA – 2000 kVA |
| Voltage Compensation Range | ±10% to ±50% |
| Correction Time | < 3 ms |
| Efficiency | > 98% |
| Output Voltage Accuracy | ±1% |
| Operating Temperature | –10°C to +45°C |
| Cooling | Air or oil-cooled options |
| Compliance | IEC / IS standards |
Why Choose PurityElec DVR?
• Proven Reliability: Engineered for 24/7 performance in demanding environments.
• Custom Configurations: Tailored designs to meet your exact load profile.
• Energy Savings: Prevents power wastage and reduces operating costs.
• Expert Support: End-to-end technical guidance from selection to installation.
Power Stability Starts Here
Stop letting voltage fluctuations disrupt your business. Choose PurityElec Dynamic Voltage Regulators for uninterrupted, stable power supply.
Frequently Asked Questions
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Q1. What is a Dynamic Voltage Regulator (DVR)?
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Q2. Why is voltage regulation important?Voltage fluctuations can:
- • Damage sensitive equipment (PLCs, UPS, motors, IT devices)
- • Cause production downtime in industries
- • Increase energy losses and reduce efficiency
- • Trigger nuisance tripping of circuit breakers
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Q3. How is a DVR different from traditional voltage stabilizers?
- • DVRs provide real-time, fast-acting voltage correction in milliseconds.
- • Traditional stabilizers respond slowly and are suitable only for low-power or residential loads.
- • DVRs can handle sags, swells, and short-term disturbances, not just under/over-voltage.
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Q4. How does a DVR work?A DVR uses Voltage Source Converters (VSCs) with IGBTs to inject a compensating voltage in series with the supply line, maintaining the load voltage within the desired range.
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Q5. Can a DVR correct both under-voltage and over-voltage?Yes. It injects voltage to compensate for sags (under-voltage) and absorbs voltage in case of swells (over-voltage).
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Q6. How fast does a DVR respond?DVRs typically respond within milliseconds, making them ideal for industrial processes and sensitive loads.
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Q7. Where is a DVR typically used?
- • Industrial plants with sensitive machinery (motors, CNC machines, welding machines)
- • Data centers and IT infrastructure
- • Hospitals and medical equipment
- • Renewable energy systems (wind/solar integration points)
- • Commercial buildings with critical loads
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Q8. Can a DVR handle harmonics?DVRs primarily correct voltage disturbances. Advanced DVRs may include filters to reduce voltage harmonics, but separate harmonic filters (AHF) are recommended for full harmonic mitigation.
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Q9. Is DVR suitable for long-term voltage support?DVRs are mainly designed for short-term disturbances (milliseconds to seconds). For long-term voltage correction, solutions like SVC, RPG, or on-load tap changers are preferred.
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Q10. What are the benefits of using a DVR?
- • Protects sensitive equipment from voltage sags, swells, and flickers
- • Reduces production downtime and prevents process interruptions
- • Fast response (milliseconds)
- • Compact and modular design
- • Improves overall power quality and system reliability
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Q11. How does DVR compare with other voltage correction devices?
Feature DVR Stabilizer STATCOM/RPG Response time Milliseconds Seconds Milliseconds Type of correction Sags, swells, flickers Over/under-voltage Voltage & reactive power Load suitability Sensitive & critical Residential/low-power Industrial & utility-scale Footprint Compact Moderate Larger (depending on rating) -
Q12. What standards govern DVR design and operation?
- • IEC 61000 series (EMC & Power Quality)
- • IEEE 1159 (Voltage Sag & Flicker)
- • Local grid and utility voltage quality requirements