AUTOMATIC VOLTAGE REGULATOR
High-precision single-phase and three-phase servo motor and static automatic voltage regulators and stabilizers engineered by TNS Engineering Ltd.
AUTOMATIC VOLTAGE REGULATOR
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An Automatic Voltage Regulator (AVR) or Servo Voltage Stabilizer automatically corrects fluctuating grid voltage, stabilizing input power between 140V–260V to a tight ±1% output. TNS Engineering Ltd supplies 650VA single-phase to 5000kVA three-phase servo stabilizers across Bangladesh for factories, pharmaceutical plants, printing presses, and sensitive medical imaging equipment.
Automatic Voltage Regulators (AVR) & Servo Stabilizers in Bangladesh
In Bangladesh, industrial zones across Gazipur, Narayanganj, Chittagong, and Savar frequently encounter severe phase imbalance, high-voltage surges, and prolonged brownouts. Running automated European or Japanese precision CNC machinery, injection molding presses, and textile jacquard looms on unstable voltage leads to catastrophic motor burnouts and controller memory failures.
TNS Engineering Ltd. specializes in industrial Servo Motor Automatic Voltage Regulators and static voltage stabilizers engineered with pure copper toroid autotransformers, digital micro-controller monitoring, and independent three-phase voltage balancing.
Servo Voltage Stabilizer Technical Specification & Application Matrix
Recommended stabilizer capacity by commercial and heavy industrial machinery type.
| Capacity Range | Phase & Input Window | Regulation Speed | Ideal Equipment & Applications | Protection Features |
|---|---|---|---|---|
| 650VA – 5kVA | 1-Phase (140V – 260V) | > 25V / sec | Medical diagnostic analyzers, deep freezers, home electronics, billing POS | Under/over voltage cutout, surge suppressors, delay timer |
| 10kVA – 30kVA | 1-Phase & 3-Phase (304V – 456V) | > 20V / sec | Offset printing machines, elevator drives, commercial bakery ovens | Phase failure protection, bypass switch, overload trip |
| 50kVA – 150kVA | 3-Phase (280V – 460V Wide Window) | > 15V / sec | Garments cutting lines, pharmaceutical blister packaging, hospital MRI/CT | Independent phase regulation, digital LCD metering, class H insulation |
| 200kVA – 1000kVA | 3-Phase 4-Wire (304V – 456V) | > 15V / sec | Full factory main distribution, textile spinning, steel rerolling lines | Heavy copper busbars, dual cooling fans, thermal cutouts, MCCB protection |
| 1500kVA – 5000kVA | 3-Phase High Capacity Substation | Continuous Stepless | Substation secondary side, large export industrial complexes (EPZ/EZ) | Oil-immersed / dry-type options, motorized variac, SCADA remote interface |
Howa Power in Bangladesh
Direct factory distribution, official manufacturer warranty, and certified technical support.
Frequently Asked Questions about AUTOMATIC VOLTAGE REGULATOR in Bangladesh
Q:Why is a servo motor stabilizer superior to a relay-type voltage stabilizer?
Servo motor stabilizers deliver stepless, continuous voltage regulation within ±1% accuracy without power clicks, sparks, or stepping wave interruptions that damage sensitive electronic microprocessors.
Q:What is independent three-phase regulation in industrial AVR?
In factories with uneven phase loading, one phase may drop to 180V while another is at 230V. Independent regulation uses three distinct servo motors to balance each phase to 220V/380V independently.
Q:How do I choose the correct AVR capacity for induction motor loads?
Due to initial starting inrush currents that can reach 3x to 5x nominal running current, size the stabilizer at minimum 2x to 2.5x the combined motor horsepower rating.
Q:Who manufactures the AVR systems supplied by TNS Engineering?
TNS Engineering is the official Bangladesh distributor of Howa Power and G-Mac servo stabilizers, backed by German and Asian precision engineering and factory certified technical service.
Need Engineering Sizing or an Official Project Quotation?
Consult with our senior electrical power engineers in Banasree, Dhaka for load audits, factory sizing calculations, and official wholesale quotations without retail middleman markup.