★ 4.9
In stock · dispatch in 3–5 days
Servolink single phase air cooled servo stabilizers deliver a stable 230 V (±1%) output.
The servo stabilizer continuously monitors the grid supply voltage, and when the input fluctuates from 230 V, the single phase servo stabilizer comes into action. As soon as it detects the unstable voltage, it automatically corrects it — so every dip or spike on the line is corrected before it reaches the equipment.
SERVOLINK makes single phase air cooled servo stabilizers in 3, 5, 7.5, 10, 15, 20, 25, 30, 40 and 50 kVA ratings, covering wide to normal working input voltage ranges from 100-270 V, 140-270 V, 170-270 V and 180-270 V. We also customize as per the customer requirement. The air cooled cabinet contains no transformer oil, so it suits a dry, covered location with room for ventilation and service.
This is the same servo-motor correction technology used in our three phase air cooled and oil cooled servo stabilizers. The single phase version is built for the phase-to-neutral connection that most homes and small commercial premises actually have.
Single phase is the most common power connection in India. Most of the appliances we use every day run on it — air conditioners, refrigerators, microwave ovens, fans, water pumps, televisions, hair dryers and air fryers. These appliances are designed to work on 230 V.
Grid voltage rarely stays at 230 V. Low voltage, high voltage, sudden dips and spikes are common — especially during peak seasons (most common in summer, when everyone switches on their AC at night and a sudden voltage dip can be felt), during peak hours, and at the end of long distribution lines. Unstable voltage puts appliances at risk. It can damage compressors, motor drives, control cards (PCBs) and other internal components, which leads to costly repairs and a shorter appliance life.
The air cooled design is compact, easier to move and install, and does not require transformer oil. This makes it suitable for many indoor applications where space and ease of maintenance matter.
Easy to handle, install and relocate — it fits where a heavier oil filled unit will not.
There is no oil level to check, top up or replace, so routine upkeep stays minimal.
Well suited to domestic and small commercial use, where space is limited and loads are moderate.
The control card keeps reading the input and output voltage. The moment the output drifts, it drives the servo motor, which moves the carbon brush along the variac. The buck-boost transformer then adds or subtracts exactly the correction needed, so the output stays steady at 230 V. Follow the numbers in the diagram below.
Tap the diagram to open it full size
| Brand | SERVOLINK |
| Product Type | Single Phase Air-Cooled Servo Voltage Stabilizer |
| Capacity | 3, 5, 7.5, 10, 15, 20, 25, 30, 40 & 50 kVA; other ratings on request |
| Supply System | Single phase, phase + neutral, with protective earth |
| Input Voltage Range | 100-270 V / 140-270 V / 170-270 V / 180-270 V, as per selected model |
| Output Voltage | 230 V ±1%, within the specified input range and rated load |
| Frequency | 50 Hz |
| Mode of Operation | Automatic, servo-controlled |
| Duty Cycle | Continuous operation within rated conditions |
| Efficiency | More than 98% |
| Variac | 100% copper wound, made in-house |
| Cooling | Air-cooled (natural air, fan on higher ratings) |
| Installation | Indoor, or under a proper shed |
| Ambient Operating Temperature | Up to 50°C |
| Display | LCD on all models |
| Voltage Protection | High/low voltage cut-off on all models |
| Overload / Short-Circuit Protection | As per selected model |
| Restart Delay | Provided on all models |
| Manual Bypass | Optional |
| Standard | Built as per IS 9815 (Part 1):1994, IS 5142, IS 302 (Part 1) |
We have been making stabilizers since 1980. Every major part of our single phase servo is made in-house at our 16,000 sq ft manufacturing facility in Ghaziabad — variac winding, variac motorization, buck-boost winding, enclosure fabrication, assembly and testing, each in its own workstation. Our variacs are 100% copper wound, and every unit is tested in our own testing section before dispatch.
Yes, if the house has a single phase supply, the downstream circuits are connected through it, and the unit is sized for everything that can operate together, including motor starting. Share the load list before choosing a rating, or use our kVA calculator.
Air cooled is better for indoor homes, shops and offices: lighter, cleaner and no oil maintenance. Oil cooled is better for hot, dusty or semi-outdoor sites and loads running near full rating all day. Site temperature, dust and load duty decide the construction.
A normal (relay) stabilizer corrects in fixed steps of about 10–15 V and usually protects one appliance. A servo stabilizer corrects smoothly to ±1% and can protect the whole building.
For a normal home inverter or UPS, connect it after the stabilizer, so it receives steady voltage. For a solar inverter that exports to the grid, tell us the make, model and wiring arrangement before the stabilizer is specified, because the connection depends on that equipment.
Yes. Inverter ACs work over a range of voltage, but they still run cooler and more efficiently on a stable 230 V, and the stabilizer protects the rest of the house too.
It corrects at a rated speed in volts per second; a typical dip of 30–40 V is corrected in about one second. The exact figure for each model is in our specification sheet.
It does not reduce your bill directly. It stops motors drawing extra current at low voltage and prevents breakdowns, which saves repair and replacement costs.
An air cooled unit should be installed indoors or under a proper shed, away from rain, direct sun and dust. For outdoor sites, choose an oil cooled model.
You may hear a soft hum from the transformer, the motor moving briefly during correction, and the fan on higher ratings. A grinding or clicking sound means it needs service.
A correctly sized and maintained unit typically runs 8–10 years or more. Running it continuously near full rating is the biggest cause of early wear.
Dust cleaning and a carbon brush check every six months (more often at a very dusty site), and a full technician check once a year. Always have a qualified person isolate the supply before opening the cabinet. An AMC covers all of this.
The cut-off disconnects the output to protect your equipment, and reconnects automatically after the set 0–10 second delay once input comes back into range. Input and output limits can be set to suit the supplied unit and the equipment it feeds.
No. It regulates voltage within its specified conditions. A suitably selected surge protection device addresses transient surges, and a UPS or inverter provides backup during a power cut.
For heavy loads, continuous-duty operation or very hot and dusty locations, our single phase oil cooled stabilizers may be a better fit.
ISO 9001:20152024–2027
NSIC Registration2025–2027
MSME / UdyamRegistered 2021
Importer–Exporter CodeIssued 2019
Industrial Registration2010 record
CE — Certificate of Compliance2015–2016 record
NSIC–ONICRA Rating2016–2017 rating
ISO 9001:20152021–2024
ISO 9001:20152018–2021
ISO 9001:20082015–2018
ISO 9001:20082011–2014
As the preferred choice for servo voltage stabilizer manufacturers in Ghaziabad, Servolink is committed to delivering top-quality power solutions that empower industries to thrive amidst the challenges of fluctuating power supply. With our dedication to excellence, innovation, and customer satisfaction, we strive to be your trusted partner in ensuring uninterrupted power stability for your business operations. Choose Servolink for reliable, efficient, and cost-effective servo voltage stabilizers that exceed your expectations and drive success for your industry in Ghaziabad.
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