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TND 1-Phase Home Use Automatic Voltage Stabilizer Wide Input 90V - 260VTND 1-Phase Home Use Automatic Voltage Stabilizer Wide Input 90V - 260V
KADQQ | AC Voltage Regulator
TND 1-Phase Home Use Automatic Voltage Stabilizer Wide Input 90V - 260V
Highlights at a glanceHigh Precision: Ensures stable output voltage within wide input range.Wide Input Range: Operates efficiently between 90V-260V.Efficiency Over 98%: Reduces energy loss for cost savings.Fast Response Time: Adjusts voltage in ≤0.5 seconds for quick stabilization.Multiple Protection Features: Includes overvoltage, short circuit, and...
TND-5KVA High Precision Servo Motor Control Voltage Stabilizer Single Phase 220V 1% Regulation SVC LCD 100% Copper Ultra-LowTND-5KVA High Precision Servo Motor Control Voltage Stabilizer Single Phase 220V 1% Regulation SVC LCD 100% Copper Ultra-Low
KADQQ | AC Voltage Regulator
TND-5KVA High Precision Servo Motor Control Voltage Stabilizer Single Phase 220V 1% Regulation SVC LCD 100% Copper Ultra-Low
Highlights at a glanceWide Input Range: Operates efficiently across 150-260V for stable power delivery.Automatic Voltage Regulation: Ensures consistent voltage output for sensitive equipment.User-Friendly Design: LCD display provides real-time status monitoring for easy management.Robust Protection: Includes Over Temperature, Overcurrent, Overvoltage, Short Circuit, and Undervoltage protection.High...
TND-3KVA Budget Voltage Regulator - 90-260V, ±3% Accuracy, 2-Year WarrantyTND-3KVA Budget Voltage Regulator - 90-260V, ±3% Accuracy, 2-Year Warranty
KADQQ | AC Voltage Regulator
TND-3KVA Budget Voltage Regulator - 90-260V, ±3% Accuracy, 2-Year Warranty
Highlights at a glanceCost-Effective Solution: Affordable entry model without sacrificing basic stability.Essential Protection: Shields TVs, routers, and basic electronics from brownouts.Simple Installation: No tools needed-plug into wall outlet and connect devices.Warranty Included: 2-year coverage for peace of mind.Dongguan Ke Ao Power Equipment Co.,Ltd., specializing...
Waterproof Outdoor Voltage Stabilizer OEM/ODM Industrial PowerWaterproof Outdoor Voltage Stabilizer OEM/ODM Industrial Power
KADQQ®
Waterproof Outdoor Voltage Stabilizer OEM/ODM Industrial Power
Your Strategic Partner in Industrial Power Regulation. Elevate your product portfolio with our high-performance Outdoor Voltage Stabilizers. Specialized in OEM, ODM, and OBM manufacturing, we deliver ruggedized power solutions built for the world’s most challenging environments. Our factory-direct model is designed for wholesale partners...
SBW-80kVA CE Certified Copper Three Phase Voltage Stabilizer SVC 400V Floor Mounted AVR for Data CenterSBW-80kVA CE Certified Copper Three Phase Voltage Stabilizer SVC 400V Floor Mounted AVR for Data Center
KADQQ | AC Voltage Regulator
SBW-80kVA CE Certified Copper Three Phase Voltage Stabilizer SVC 400V Floor Mounted AVR for Data Center
Company Information     Product Description SBW is a standard model designation (common in China and global markets) for large-capacity, three-phase or single-phase servo-controlled automatic voltage stabilizers. It uses a servo motor + carbon brushes + auto-transformer (buck-boost transformer) to continuously adjust output voltage. Widely used in industrial,...
Three Phase Copper Solid-state Static AC Voltage Stabilizer for Stable Voltage RegulationThree Phase Copper Solid-state Static AC Voltage Stabilizer for Stable Voltage Regulation
KADQQ | AC Voltage Regulator
Three Phase Copper Solid-state Static AC Voltage Stabilizer for Stable Voltage Regulation
  Company Information     Product Description A contactless voltage stabilizer is an advanced type of automatic voltage regulator (AVR) that adjusts output voltage without using mechanical switches, relays, or moving parts (like carbon brushes in servo stabilizers). Instead, it uses solid-state semiconductor devices—such...
TNSJA Series Manufacturer's High-Power 380V Three-Phase Industrial Voltage Stabilizer Oil-Immersed AC 98% Efficiency DigitalTNSJA Series Manufacturer's High-Power 380V Three-Phase Industrial Voltage Stabilizer Oil-Immersed AC 98% Efficiency Digital
KADQQ | AC Voltage Regulator
TNSJA Series Manufacturer's High-Power 380V Three-Phase Industrial Voltage Stabilizer Oil-Immersed AC 98% Efficiency Digital
Highlights at a glanceOil immersed cooling system ensures superior heat dissipation and extended service life for continuous high power industrial operationDigital microprocessor control delivers precise voltage regulation with 98 percent energy efficiency and real time operational monitoringComprehensive protection against overvoltage under voltage overload short...
3kVA Single Phase Copper CE & RoHS Relay Voltage Stabilizer-ISO Certified for Global Home & Office Use3kVA Single Phase Copper CE & RoHS Relay Voltage Stabilizer-ISO Certified for Global Home & Office Use
KADQQ | AC Voltage Regulator
3kVA Single Phase Copper CE & RoHS Relay Voltage Stabilizer-ISO Certified for Global Home & Office Use
Company Information     Product Description A relay-type voltage stabilizer (also known as a step-type or switching-type voltage stabilizer) is an automatic voltage regulation device that uses electromechanical relays to switch between different taps on a transformer in response to input voltage fluctuations, thereby...

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KEAO Variac Transformer Copper Wound Three Phase Variable AC Autotransformer 0-380V 50/60Hz 15KVA LCD Digital Display 98%
KEAO Variac Transformer Copper Wound Three Phase Variable AC Autotransformer 0-380V 50/60Hz 15KVA LCD Digital Display 98%
KEAO Variac Transformer Copper Wound Three Phase Variable AC Autotransformer 0-380V 50/60Hz 15KVA LCD Digital Display 98%
KEAO Variac Transformer Copper Wound Three Phase Variable AC Autotransformer 0-380V 50/60Hz 15KVA LCD Digital Display 98%
KEAO Variac Transformer Copper Wound Three Phase Variable AC Autotransformer 0-380V 50/60Hz 15KVA LCD Digital Display 98%
KEAO Variac Transformer Copper Wound Three Phase Variable AC Autotransformer 0-380V 50/60Hz 15KVA LCD Digital Display 98%

KEAO Variac Transformer Copper Wound Three Phase Variable AC Autotransformer 0-380V 50/60Hz 15KVA LCD Digital Display 98%

Vendor: KADQQ | AC Voltage Regulator

OEM/OEM From 1 Pcs!

If you have any special requirements, pls feel free to send us an inquiry! You will get the best offer, even MOQ from 1PCS.

Inquiry Now

Fast Worldwide Delivery

Service Over 110 Countries.

We can deliver anywhere you are.

Quality Guarantee

There are 5 stages of quality inspection

in our production, from receiving materials.

100% Manufactory

With 24+ years of experience.

Our facility is ISO 22716 certified and GMP Accredited

Description
Description
x
Company Information

 
 
Product Description

A Variac transformer is a manual, continuously adjustable autotransformer prized for its simplicity, reliability, and clean sine-wave output. While invaluable in labs and repair shops, its lack of isolation demands caution. Despite newer electronic alternatives, it remains a staple tool for anyone needing precise, analog control of AC voltage.

How It Works

  • It’s an autotransformer, meaning it has only one winding that acts as both primary and secondary.
  • A movable carbon brush (or sliding contact) rides along the exposed turns of the winding.
  • By rotating a knob or handle, the brush changes the number of turns included in the output circuit, thereby adjusting the output voltage proportionally.

Key Features

Feature Description
Phase Single-phase (most common); three-phase versions exist but are rare
Output Range Typically 0 to ~140% of input voltage
Waveform Pure sine wave (no distortion—ideal for sensitive equipment)
Control Manual (knob/handle); motorized versions available
Isolation  Not isolated—input and output share a common ground (safety risk!)
Efficiency Very high (>95%) due to minimal losses

Common Applications

  1. Laboratory Testing

    • Gradually power up circuits to monitor behavior.
    • Test device tolerance to over/under-voltage.

  2. Equipment Burn-in & Debugging

    • Soft-start motors or transformers to avoid inrush current damage.

  3. Lighting Control (Historical)

    • Dim incandescent or halogen lamps (largely replaced by solid-state dimmers).

  4. Calibration & Repair Shops

    • Adjust voltage for vintage electronics or international appliances.

  5. Education & Demonstrations

    • Teach transformer principles and AC voltage control.

Variac vs. Other Voltage Controllers

Device Output Type Isolation Precision Use Case
Variac (Autotransformer) Smooth, continuous, pure sine No High Lab, testing, analog control
Relay-Type Stabilizer Stepped (discrete levels) No Low–Medium Home appliance protection
Servo Stabilizer Continuous via motor No (usually) Medium–High Industrial voltage correction
Isolation Transformer Fixed ratio (e.g., 1:1) Yes N/A Safety, noise reduction
Solid-State Dimmer Phase-cut (distorted sine) No Low Lighting only

 
Packaging & Shipping

 

FAQ

Q1: What Is The Guarantee?
A1:Within 5 Year From The Sale Date, If There Are Any Accessory Problems,You Just Provide The Photos Of Damaged Accessory, Then We Will Provide A Satidfication After-Sale Service For Free.

Q2: Can We Put/Show Our Own Logo On Your Products?
A2: Yes, No Problem, However, The Quantity Should Be A Bit Big.


Q3: Is OEM/ODM Available?
A3: Yes, It Is! Our Products Can Be Customized.We Design And Produce All Kinds Of Automatic Voltage Regulators/Stabilizers/Transformers/UPS According To Our Customers’ Specific Requirements.

Q4: What Is The MOQ?
A4: 1PCS Order Is Acceptable And Welcomed Always.

Q5: Can You Offer Form A Or Form E Or C/O?
A5: Yes, No Problem.

Q6:Why Should You Buy From Us Not From Other Suppliers?
We Have 20 Years Of Experience In Electric Equipments And Have Implemented A Strict And Complete Quality Control System To Ensure Quality And Safety, So We Have A Good Reputation In This Field And Are Favored By Domestic And Foreign Customers.
 

Our AC Voltage Regulator Advantage

Self-developed PCB circuit boards

Our self-developed PCB circuit boards enhance product performance and reliability through continuous personalized design and circuit optimization.

Digital and Liquid Crystal Display

The high-resolution display provides clear, real-time voltage status information, which simplifies the monitoring and adjustment process and enhances the user's convenience of operation.

High Quality Housing Materials

The use of high-quality PC/ABS and metal materials, combined with UV coating process, significantly improves the product's durability, flexibility, impact strength, temperature resistance and aesthetics.

Our Core Capabilities

#KADQQ Due to excellent management practices, we ensure competitive pricing, timely delivery, and the highest product reliability. These AVR/automatic voltage stabilizers are certified by IEC, CE, FCC, RoHS, ISO9001, ISO14001 and ISO45001. We also offer professional OEM and ODM services to meet your specific needs: you name it, we make it.
Profitable
We help you grow your business and increase profitability through effective cost control.
Diversified products
Our products are diversified in terms of price, design and size to meet different market needs and preferences.
Timely Delivery
From prototyping to delivery, we deliver within two weeks to cope with growing demand.
Warranty and Support
High-quality raw materials and advanced production processes provide a service life of 10 to 25 years, reducing maintenance costs.
Leading-edge technology
We use the latest high-quality spare parts and provide a wealth of customized functional support to ensure efficient operation and long-term durability.
Creative Marketing
Our professional marketing team demonstrates product performance through videos and images to enhance your brand image and expand your market audience.
Get The Best Offer Now!

Our Efficient and Safe Voltage Regulation Solutions

We offer customized voltage regulator solutions to meet your unique power needs. Whether it’s industrial equipment, household appliances, or commercial premises, we can design and manufacture your own voltage regulator to ensure stable voltage and safe operation of your equipment!
What is the Guarantee?

Within one year from the sale date, if there are any accessory problems, you just provide the photos of damaged accessory, then we will provide free accessory. According to the number of products, we will provide easily damaged accessories for free. We also can provide technical support if you need.

Yes, we are glad to do that. You can even print from 1 piece.

Yes, It Is! Our Products Can Be Customized. We Design And Produce All Kinds Of Automatic Voltage Regulators/Stabilizers According To Our Customers’ Specific Requirements.

MOQ from 1.

Yes, no problem, we can apply for it from our local government.

CE, ISO9001 and SGS.

L/C, T/T, D/P, D/A, Western Union and MoneyGram (for Small-amount payment).

Whether the voltage is high or low in order to calculate the selection of the appropriate voltage regulator.

India’s voltage is 220/380—230/400V, frequency is 50Hz.
The Philippines’ voltage is 220V, frequency is 60Hz.
Bangladesh’s voltage is 230V, frequency is 50Hz.

Different electrical appliances regulator optional power calculation is not the same.

Single-phase or three-phase — single-phase is generally used for household electricity, while three-phase is generally used for industrial power.

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