KTAC TECHNOLOGY is a manufacturer and supplier of Automatic Voltage Regulators, presents the AVS Series: a comprehensive lineup of relay type AC automatic voltage regulators covering power ratings from 500VA to 10,000VA. Featuring advanced MCU-controlled circuits, high-efficiency toroidal transformers, zero-cross switching technology, and comprehensive protection mechanisms, the Relay Type AVR delivers reliable, cost-effective voltage stabilization for home appliances, office equipment, and light commercial applications.
Model: AVS-10000P
Power Capacity: 10000VA / 6000W
Regulation Accuracy: ±8%
Transformer: Heavy‑duty toroidal (oversized)
Protections: Full suite with 40A breaker and reinforced thermal management
Certification: CE, ROHS
Lead Time: 10‑15 days (custom orders)
Model: AVS-8000P
Power Capacity: 8000VA / 4800W
Regulation Accuracy: ±8%
Transformer: Heavy‑duty toroidal
Protections: Full suite with 40A breaker
Certification: CE, ROHS
Lead Time: 7-10 days
Model: AVS-5000P
Power Capacity: 5000VA / 3000W
Regulation Accuracy: ±8%
Transformer: Heavy-duty toroidal auto-transformer
Protections: Full suite with 25A breaker
Certification: CE, ROHS
Lead Time: 7-10 days
Model: AVS-3000P
Power Capacity: 3000VA / 1800W
Regulation Accuracy: ±8%
Transformer: Toroidal auto-transformer
Protections: Full suite with heavy-duty 20A breaker
Certification: CE, ROHS
Lead Time: 7-10 days
Model: AVS-2000P
Power Capacity: 2000VA / 1200W
Regulation Accuracy: ±8%
Transformer: Toroidal auto-transformer (low EMI)
Protections: Full suite with audiophile-grade quiet operation
Certification: CE, ROHS
Lead Time: 7-10 days
Model: AVS-1500P
Power Capacity: 1500VA / 900W
Regulation Accuracy: ±8%
Transformer: Toroidal auto-transformer
Special Feature: 180s delay for compressor protection
Certification: CE, ROHS
Lead Time: 7-10 days
Model: AVS-1000P
Power Capacity: 1000VA / 600W
Regulation Accuracy: ±8%
Transformer Type: Toroidal auto-transformer
Protections: Full suite (OL, OH, SC, OV/UV)
Certification: CE, ROHS (available)
Lead Time: 7-10 days
Model: AVS-500P
Power Capacity: 500VA / 300W
Regulation Accuracy: ±8%
Transformer Type: Toroidal auto-transformer
Protections: Overload, over-temp, short-circuit, over/under-voltage, delay
Certification: CE, ROHS (available)
Lead Time: 7-10 days
Rated Capacity: 10,000VA / 6,000W
Input Voltage Range: 130–270VAC
Output Connection: Terminal block (compatible with distribution boxes)
Protection Types: Over-voltage, under-voltage, overheating, overload, short circuit
Suitable Loads: Entire production lines, central air conditioning systems, large cold storage units, injection molding machines, CNC machine tools, etc.
Rated Capacity: 5000VA / 3000W
Input Voltage Range: 130–270VAC
Protection Types: Over-voltage, under-voltage, overheating, overload, short circuit
Suitable Loads: High-power air conditioners, imported refrigerators, laser printers, CNC engraving machines, medical equipment
Rated Capacity: 2000VA / 1200W
Input Voltage Range: 130–270VAC
Output Voltage Accuracy: ±8%
Protection Types: Over-voltage, under-voltage, over-temperature, overload, short-circuit
Suitable Loads: Refrigerators, air conditioners, computers, printers, small motors, etc.
A relay type automatic voltage regulator (AVR), also known as a tap-switching voltage stabilizer, is an electrical device that automatically maintains a constant output voltage despite fluctuations in incoming utility power. Unlike servo motor AVRs that use mechanical motors, relay type AVRs employ electromagnetic relays to switch between different taps on an autotransformer, either boosting low voltage or bucking high voltage to keep the output stable. The result is reliable protection for connected appliances against over-voltage, under-voltage, and power surges.
Selecting the optimal voltage regulator requires careful evaluation of several key factors:
1. Power Capacity – Calculate the total power consumption (in watts) of all devices you plan to protect. Choose a model with rated power at least 20-30% higher than your total load to accommodate startup surges. The AVS Series covers from 500VA/300W for single computers to 10,000VA/6,000W for light commercial applications.
2. Form Factor – The AVS Series is available in two designs: Tower Type (AVS) for desktop or floor placement, and Wall Mount Type (AVS-P) for space-saving installation on walls——ideal for kitchens, utility rooms, and workshops.
3. Input Voltage Range – Standard AVS models accept 130-270VAC input, while AVS-P wall mount models offer 140-260VAC or 100-260VAC, making them suitable for regions with unstable grid power.
4. Protection Features – Look for comprehensive protection including over-voltage, under-voltage, over-temperature, overload, and short circuit protection. All AVS Series models include these safeguards along with selectable delay time (6s or 180s) to protect compressor-equipped appliances.
The AVS Series is built around an advanced MCU-controlled circuit that continuously monitors input voltage and automatically stabilizes output with precision as accurate as ±8%. With 7 taps on the toroidal autotransformer, the regulator can select from multiple voltage correction levels to maintain stable output across a wide input range (130-270VAC), ensuring connected equipment receives clean, stable power.
The AVS Series employs current-based zero-cross switching technology, ensuring relays switch precisely when the AC waveform crosses zero. This minimizes arcing, reduces relay contact wear, and extends the operational life of the unit. Fast response times (5-10ms) ensure immediate voltage correction without interrupting connected devices.
All AVS Series models feature high-efficiency toroidal (ring-type) autotransformers. Compared to traditional laminated transformers, toroidal designs are more compact, lighter, produce less electromagnetic interference, and operate with higher efficiency. This translates into lower energy consumption, reduced heat generation, and extended service life——the 500VA model measures just 210×155×155mm and weighs only 2.3kg.
The AVS Series incorporates full protection features: over-voltage shutdown at 255V, under-voltage shutdown below 180V, over-temperature protection at 120°C, overload protection, and short circuit protection. Each model is equipped with appropriately rated circuit breakers ranging from 5A to 50A depending on capacity.
Selectable safety cycle delays of 6 seconds or 180 seconds protect connected appliances from instantaneous voltage impacts when power is restored after an outage. The 180-second delay is particularly valuable for refrigerators and air conditioners, allowing compressor pressure to equalize before restarting.
Each unit features intuitive LED indicators: Green (power on), Yellow (delay mode), Red (fault/protection), plus dual LED volt meters displaying both input and output voltages simultaneously.
AVS-500 / AVS-500P (500VA/300W): Ideal for a single computer, monitor, or small TV.
AVS-1000 / AVS-1000P (1000VA/600W): Suitable for desktop PC, printer, and small appliances.
AVS-1500 / AVS-1500P (1500VA/900W): Perfect for home entertainment systems and multiple devices.
AVS-2000 / AVS-2000P (2000VA/1200W): Designed for refrigerators, TVs, computers, and lighting.
AVS-3000 / AVS-3000P (3000VA/1800W): Covers whole-home protection for medium households.
AVS-5000 / AVS-5000P (5000VA/3000W): Suitable for large homes, small offices, and multiple appliances.
AVS-8000 / AVS-8000P (8000VA/4800W): For small shops, workshops, and commercial equipment.
AVS-10000 / AVS-10000P (10000VA/6000W): Designed for light commercial applications and high-power devices.
Home Appliance Protection: Safeguard refrigerators, freezers, air conditioners, washing machines, and televisions from voltage fluctuations that can damage compressors and sensitive electronics.
Home Office and Computing: Protect desktop computers, monitors, printers, and networking equipment from brownouts and surges that can corrupt data or damage power supplies.
Retail and POS Systems: Ensure cash registers, card terminals, and barcode scanners remain operational during voltage fluctuations, preventing transaction interruptions.
Small Offices: Protect photocopiers, fax machines, and other office peripherals sensitive to voltage variations.
Workshops and Garages: Safeguard power tools, compressors, and workshop equipment from voltage-related damage.
With over 20 years of continuous power supply manufacturing since 2004, KTAC has built a reputation for quality and reliability. Our manufacturing foundation includes 3 factories with over 8,000 m² of production floor, 100+ professional staff, and exports to 30+ countries worldwide. We support OEM/ODM services including custom enclosure color, logo printing, packaging design, and parameter customization.
A: Relay type AVRs use electromagnetic relays to switch transformer taps, offering fast response (5-10ms) and ±8% regulation——ideal for home appliances. Servo motor AVRs offer higher precision (±1-2%) but slower response and higher cost. For most residential applications, relay type provides the best value.
A: Yes, as long as the generator output is within the unit's input voltage range (130-270VAC) and frequency (50/60Hz). The wide input range and automatic frequency sensing ensure compatibility with most portable and standby generators.
A: The delay function (selectable 6s or 180s) prevents immediate reconnection after power restoration, protecting appliances with compressors (refrigerators, air conditioners) from rapid power cycling damage.
A: With proper usage, a relay type AVR can last 5-10 years. The zero-cross switching technology in the AVS Series minimizes relay contact wear, extending operational life.
