What Is an Automatic Voltage Regulator? Your Power Protection Guide
An automatic voltage regulator (AVR), also called an automatic voltage stabilizer, is a device that maintains a steady voltage supply to electrical equipment, regardless of input voltage fluctuations. It acts as a “guardian” for your appliances, correcting overvoltage, undervoltage, and surges in real time.

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Single-Phase Relay Type Ac Voltage Stabilizer For Home
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DNB AVR 220v 230v 240v Single-Phase Relay Type Ac Voltage Stabilizer For Home

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DNB single-phase voltage stabilizer has a capacity of 500~5Kva, adopts 12 sets of magnetic latching relays, and has a response speed of < 20ms. The housing is made of 1.2mm cold-rolled steel plate, which has a 60% increase in impact strength. It is combined with 6 electrostatic environmental spraying processes to say goodbye to rust and peeling, and has higher durability. It can be laid flat or wall-mounted for flexible installation options. The back has prefabricated M4 mounting holes and 4 support feet. The wall thickness ≥10cm can bear it, saving 80% of the ground space. Its high cost performance makes it an ideal choice for residential and commercial applications.
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How Does It Work?

Using transformers, relays, or servo motors, the AVR continuously monitors voltage. If the input deviates from the safe range (e.g., 220V±10%), it adjusts the output automatically. Advanced models include microprocessors for precision control.

Key Benefits

Equipment Protection: Shields motors, electronics, and machinery from damage.
Energy Savings: Reduces power waste caused by unstable voltage.
Seamless Operation: Prevents downtime in industries, hospitals, and homes.

Where Is It Used?

Industrial: CNC machines, production lines.
Residential: ACs, refrigerators, TVs.
Commercial: Servers, medical devices, elevators.

FAQ

Q1: Is an automatic voltage stabilizer the same as a regulator?
A: Yes—the terms are often interchangeable, though "regulator" may imply broader voltage correction capabilities.

Q2: Can it work with a UPS/inverter?
A: Absolutely! Pairing an automatic voltage regulator with a UPS ensures stable backup power.

Q3: What size AVR do I need for a 3-ton AC?
A: A 10-12 kVA stabilizer is ideal. Match the regulator’s capacity to your appliance’s power rating.

Q4: Why choose servo-controlled AVRs?
A: They offer ±1% voltage accuracy, ideal for sensitive labs or data centers.

Q5: How long do AVRs last?
A: 8-15 years with annual maintenance (cleaning contacts, testing circuits).

Pro Tip: For areas with erratic power, an automatic voltage stabilizer isn’t optional—it’s essential insurance against costly repairs and downtime!