Reviewed by the SG Power technical team at SG Power Products Pvt. Ltd. | Last updated: 2 November 2026
Among oil cooled servo voltage stabilizer manufacturers in India, SG Power Products Pvt. Ltd. makes three-phase models from 25 kVA to 500 kVA. Each unit holds the output within ±1% when the mains rises or falls, with its transformers immersed in insulating oil. The range suits factories, hospitals, hotels, malls and cold storage running heavy loads around the clock.
As oil cooled servo voltage stabilizer suppliers in Noida, we sell direct, not through traders, and build every unit in our own Ghaziabad factory. Plant engineers, consultants, contractors and project buyers across India buy from us at factory prices.
60 kVA Servo Stabilizer
Three phase, oil cooled · About 83.5 A per phase
View details75 kVA Servo Stabilizer
Three phase, oil cooled · About 104 A per phase
View details100 kVA Servo Stabilizer
Three phase, oil cooled · About 139 A per phase
View details125 kVA Servo Stabilizer
Three phase, oil cooled · About 174 A per phase
View details150 kVA Servo Stabilizer
Three phase, oil cooled · About 209 A per phase
View details200 kVA Servo Stabilizer
Three phase, oil cooled · About 278 A per phase
View details250 kVA Servo Stabilizer
Three phase, oil cooled · About 348 A per phase
View details400 kVA Servo Stabilizer
Three phase, oil cooled · About 556 A per phase
View details500 kVA Servo Stabilizer
Three phase, oil cooled · About 696 A per phase
View detailsIn short, SG Power manufactures and supplies oil cooled servo voltage stabilizers from 60 kVA to 500 kVA, three phase. Their transformers sit in insulating oil, which carries heat away, so they give ±1% regulation at 97% efficiency, tested to IS 2026 (Part 1), under continuous full load. They suit factories and hot, dusty or humid sites across India.
| Brand | KNEUTRON, made by SG Power Products Pvt. Ltd. in India |
| Capacity | 60 kVA to 500 kVA standard models; smaller oil cooled units on request |
| Phase | Three phase, four wire; balanced or unbalanced |
| Cooling | Oil cooled (ONAN: oil natural, air natural) |
| Output | ±1% regulation, 97% efficiency tested to IS 2026 (Part 1), 100% load continuously (full specifications below) |
| Price | On request |
| Supply | Across India, from Noida and the Ghaziabad factory; service in 127+ cities |
Source: SG Power product catalogue (February 2026), the KNEUTRON servo stabilizer catalogue and SG Power's oil cooled datasheets. Figures checked November 2026.
Buy your oil cooled servo voltage stabilizer direct from SG Power, a manufacturer that designs every unit, winds its transformers and tests it before dispatch. You get factory pricing, free sizing from your load list, and an input range and design matched to your site, whether it is a plant, a hospital or a cold store.
| From SG Power (Manufacturer) | From a Trader or Reseller |
|---|---|
| Factory pricing, no middleman margin | Reseller margin added |
| Sizing by the team that builds the unit | Advice varies by seller |
| Custom input ranges and balanced or unbalanced designs | Mostly stock models only |
| Transformers and variacs wound and tested in-house | Source of parts often unknown |
| Every unit tested through 173 checkpoints | Testing depends on the source |
| Service network in 127+ cities | Depends on the reseller |
Many oil cooled servo voltage stabilizer suppliers resell stock models from other makers. SG Power is both manufacturer and supplier, so it builds each unit for your load and site voltage.
An oil cooled servo stabilizer is a servo voltage stabilizer whose variacs and buck-boost transformers are immersed in insulating oil inside a steel tank. The oil carries heat from the windings to the tank walls, which pass it to the surrounding air. This is why oil cooling suits heavy loads and continuous duty, up to 500 kVA.
It is also called a servo controlled voltage stabilizer, an oil cooled automatic voltage regulator (AVR) or simply an oil cooled stabilizer. Some buyers spell it servo stabiliser or voltage stabiliser. Like every servo unit, it uses a servo motor to turn a variac, so the output stays within ±1% through low-voltage dips, high-voltage swells and other voltage fluctuations. This steady voltage correction protects machines and improves power quality at the site.
| Part | What It Does |
|---|---|
| Microcontroller (KNEUTRON) | Measures input and output voltage with true RMS sensing and decides the correction |
| Servo motor (AC stepper motor) | Turns the variac of each phase in small, smooth steps |
| Variac (dimmer) | A variable autotransformer that sets how much correction is needed |
| Buck-boost transformer | Adds voltage when the mains is low and subtracts it when the mains is high |
| Insulating oil | Cools and insulates the transformers |
| Steel tank | Holds the oil and passes heat to the surrounding air |
An oil cooled servo voltage stabilizer senses the voltage continuously and corrects it through a motor-driven variac and buck-boost transformer. Heat dissipation works by natural oil circulation: warm oil rises, gives its heat to the tank walls, cools and sinks again. This is called ONAN cooling, for oil natural, air natural.
Sense: the microcontroller reads the input and output voltage on each phase.
Compare: it compares the output with the set voltage, such as 410V.
Correct: the servo motor turns the variac, and the buck-boost transformer adds or subtracts voltage.
Cool: warm oil rises, gives its heat to the tank walls, cools and sinks again.
For a step-by-step explanation, read how a servo stabilizer works.
SG Power's oil cooled servo stabilizer range covers 60 kVA to 500 kVA, all three phase, four wire. The 60 kVA unit suits workshops and small factories, while 75 to 250 kVA covers most plants, hospitals, hotels and commercial buildings. The 400 and 500 kVA units serve large plants and campuses.
| Capacity | Full-Load Current per Phase | Typical Running Load (25% margin) | Typical Users |
|---|---|---|---|
| 60 kVA oil cooled | About 83.5 A | Up to about 38.4 kW | Mid-size factories, hotels, housing societies |
| 75 kVA oil cooled | About 104 A | Up to about 48 kW | Factories, hotels, office buildings |
| 100 kVA oil cooled | About 139 A | Up to about 64 kW | Factories, hospitals, malls |
| 125 kVA oil cooled | About 174 A | Up to about 80 kW | Plants, commercial complexes |
| 150 kVA oil cooled | About 209 A | Up to about 96 kW | Plants, hospitals, hotels |
| 200 kVA oil cooled | About 278 A | Up to about 128 kW | Large factories and buildings |
| 250 kVA oil cooled | About 348 A | Up to about 160 kW | Large factories, malls, hospitals |
| 400 kVA oil cooled | About 556 A | Up to about 256 kW | Large plants and campuses |
| 500 kVA oil cooled | About 696 A | Up to about 320 kW | Large plants and campuses |
Full-load current = kVA × 1,000 ÷ (1.732 × 415), at the nominal 415V three-phase supply voltage. Running load = kVA × 0.8 power factor, less a 25% safety margin. As oil cooled servo voltage stabilizer suppliers, we also build other capacities and other input ranges to customer requirements. Below 25 kVA, and in clean rooms, see our air cooled servo stabilizers.
Not sure which oil cooled capacity you need? Send us your load list, and we'll size it for free.
The oil cooled servo stabilizer price depends on capacity, input range, balanced or unbalanced design and oil quantity. SG Power quotes every size on request after a free load check. You get a price for the exact model your site needs, with GST, freight and installation shown separately.
| Capacity | Phase | SG Power Price |
|---|---|---|
| 60 kVA oil cooled | Three phase | Price on request |
| 75 kVA oil cooled | Three phase | Price on request |
| 100 kVA oil cooled | Three phase | Price on request |
| 125 kVA oil cooled | Three phase | Price on request |
| 150 kVA oil cooled | Three phase | Price on request |
| 200 kVA oil cooled | Three phase | Price on request |
| 250 kVA oil cooled | Three phase | Price on request |
| 400 kVA oil cooled | Three phase | Price on request |
| 500 kVA oil cooled | Three phase | Price on request |
GST, freight, unloading and installation are shown separately in the quote. * Prices are indicative. For the latest price, contact SG Power.
The oil cooled servo voltage stabilizer price rises with capacity and with a wider input range, because both need larger transformers, a bigger tank and more oil. An unbalanced design and extras such as a bypass switch or input MCCB also add cost. Ask every seller to quote the same specification so prices compare fairly.
| Factor | Effect on Price |
|---|---|
| Capacity (kVA) | Larger units need bigger transformers, variacs and tanks |
| Input voltage range | A wider range needs a larger transformer and more oil |
| Balanced or unbalanced design | Unbalanced units correct each phase separately |
| Oil quantity | The first oil fill rises with capacity and input range |
| Extras | Bypass switch, input MCCB, data logging or remote monitoring |
| Delivery and installation | Freight, unloading, installation and GST are added to the delivered price |
Prices listed on marketplaces often cover different specifications, so they are hard to compare. One listing may be a narrow input range, another a wide one; one may include the first oil fill and a bypass switch, another may not; and GST, freight and unloading may be left out. Always compare the full delivered price for the same written specification.
To choose the right oil cooled servo stabilizer capacity, add up the power (kW) of everything that runs at the same time. Divide by a 0.8 power factor to get kVA, then add a 25% safety margin for starting current and expansion. Choose the next size up, and check that the full-load current suits your cables and switchgear.
List the loads: add up the kW of all machines and equipment that run together.
Convert to kVA: divide the total kW by 0.8.
Add a margin: multiply by 1.25 for starting current and planned expansion.
Check the current: confirm the full-load current per phase suits your cables and switchgear.
Choose the size: pick the next SG Power oil cooled load capacity above the result.
| Running Load | Calculated Size | SG Power Oil Cooled Size |
|---|---|---|
| About 45 kW | About 70 kVA | 75 kVA |
| About 60 kW | About 94 kVA | 100 kVA |
| About 75 kW | About 117 kVA | 125 kVA |
| About 90 kW | About 141 kVA | 150 kVA |
| About 150 kW | About 234 kVA | 250 kVA |
| About 300 kW | About 469 kVA | 500 kVA |
For example, a factory running 60 kW of machines, compressors and lighting needs 60 ÷ 0.8 × 1.25, or about 94 kVA. A 100 kVA oil cooled servo voltage stabilizer fits.
Large servo stabilizers are oil cooled because the current through the windings grows with the rating, and so does the heat. At 100 kVA the stabilizer carries about 139 A per phase, and at 500 kVA about 696 A. Air moving through a cabinet cannot carry that much heat away reliably, hour after hour.
Oil does two jobs at once. It insulates the windings, so they can sit closer together, and it carries heat from the copper to the tank walls far better than air. The result is a steadier winding temperature under continuous full load, which is what protects the insulation and extends the life of the unit.
Oil also seals the windings away from the air, so dust, moisture and corrosive fumes cannot settle on them. That is why oil cooled units are the usual choice for foundries, textile mills, cement plants, food processing and other sites where the air is not clean.
Choose an oil cooled unit for loads above 60 kVA, dusty, humid or hot sites, and round-the-clock industrial use. Choose an air cooled servo stabilizer for loads up to 50 kVA in a clean, dry, ventilated indoor room. SG Power offers both, so the site decides the choice.
| Oil Cooled | Air Cooled | |
|---|---|---|
| SG Power range | 60 kVA to 500 kVA | 10 kVA to 50 kVA |
| How it is cooled | Transformers immersed in oil (ONAN) | Natural or fan airflow through the cabinet |
| Best site | Factories, hot, dusty or humid rooms, 24×7 duty | Clean, dry, ventilated indoor rooms |
| Weight and size | Heavier, needs a firm base or plinth | Lighter, more compact |
| Maintenance | Oil level, leak and oil condition checks, plus brushes | Dust cleaning, vent and brush checks |
| Typical users | Factories, hospitals, hotels, malls, cold storage | Homes, offices, shops, clinics, workshops |
The oil cooled vs air cooled stabilizer choice is about the room as much as the load. If the room is dusty, hot or closed, ask us about oil cooling even below 50 kVA.
Choose a balanced oil cooled servo stabilizer when all three phases carry similar loads, such as three-phase motors, machines and process lines. Choose an unbalanced oil cooled servo stabilizer when each phase feeds different single-phase loads, as in a building with mixed lighting, AC and small equipment circuits. An unbalanced unit senses and corrects each phase on its own.
| Balanced | Unbalanced | |
|---|---|---|
| How it corrects | Corrects all three phases together | Corrects each phase separately |
| Best for | Three-phase motors, machines and process lines | Buildings with mixed single-phase loads |
| Price | Lower | Higher |
Record the voltage and load on each phase for a few days, and tell us the readings when you ask for a quote. We'll recommend the right design.
SG Power oil cooled servo voltage stabilizer specifications cover every capacity from 60 kVA to 500 kVA. Each unit regulates the output within ±1% at 97% efficiency, tested as per IS 2026 (Part 1):1977, with an adjustable output delay of 3 to 200 seconds. Any other input range can be built to customer specification to suit the site conditions.
| Parameter | Specification |
|---|---|
| Rated capacity | 60 kVA to 500 kVA, three phase, four wire |
| Input voltage | 340–480V phase to phase, 170–280V phase to neutral (SG Power datasheet); custom ranges on request |
| Output voltage | 410V ±1% phase to phase and 230V ±1% phase to neutral (SG Power datasheet) |
| Regulation | ±1% |
| Efficiency | 97%, tested as per IS 2026 (Part 1):1977 (SG Power datasheet) |
| Output frequency | 50 Hz ±3% |
| Output delay | 3–200 seconds, adjustable |
| Control | KNEUTRON microcontroller, true RMS sensing without a control transformer |
| Motor | High-torque AC stepper motor |
| Transformers | Wound and tested in-house on grain-oriented silicon steel for low iron and no-load losses; built to IS 9815 (Part 1), IS 5142 and IS 2026 |
| Applicable standard | IS 9815 (Part 1)-1984 (SG Power datasheet) |
| Winding | Pure copper winding (SG Power datasheet) |
| Cooling | Oil cooled, transformers immersed in oil (ONAN) |
| Design | Balanced or unbalanced |
| Duty | Heavy-duty, 100% load, continuous |
| Country of manufacture | Made in India, at SG Power's Ghaziabad factory |
The rows marked “SG Power datasheet” are the guaranteed technical particulars from SG Power's oil cooled datasheets. Other values come from the KNEUTRON servo stabilizer catalogue. Features and specifications may change as the technology is improved, so final values are confirmed in our quotation. The IS standards are published by the Bureau of Indian Standards.
Every SG Power oil cooled servo stabilizer is a microcontroller-based digital servo stabilizer, with a KNEUTRON controller, a front-panel display and ±1% voltage regulation. Its protections cut off the output on over-voltage, under-voltage, overload, phase reversal and single phasing, with an adjustable trip time delay. Calibration is done on a touchpad, without potentiometers.
The display shows phase-to-neutral and phase-to-phase voltage, frequency and the output current of each phase. You can set the output voltage and the input voltage band, and choose manual or automatic start and stop.
| Protection | What It Guards Against |
|---|---|
| Over-voltage cut-off | High mains voltage reaching machines and equipment |
| Under-voltage cut-off | Very low voltage that overheats motors and compressors |
| Overload cut-off | Load above the set limit; the display shows “Overload”, and the output restarts once the load is reduced and Start is pressed |
| Trip time delay (3–200 seconds) | Compressor and motor damage when power returns after a cut |
| Phase reversal cut-off | Wrong phase sequence; the display shows “Ph. Reversal”, and the unit restarts once two incoming phases are interchanged and Start is pressed |
| Single phasing protection | Loss of one phase, which can burn out three-phase motors |
Need an oil cooled servo stabilizer with a custom input range? We build to your site conditions.
The main advantages of an oil cooled servo stabilizer are its steady temperature under continuous full load, its tolerance of hot, dusty and humid sites, and capacities up to 500 kVA. Its limitations are the extra weight, the floor space and the oil checks it needs. Clean indoor rooms with small loads are better served by air cooling.
| Advantages | Limitations |
|---|---|
| Steady temperature under continuous full load | Heavier, needs a firm base or plinth |
| Handles hot, dusty and humid sites better | Oil level, leaks and oil condition must be checked |
| Capacities up to 500 kVA | Takes more floor space than an air cooled unit |
| ±1% output, smooth and stepless | Carbon brush and variac track wear, so yearly service is needed |
| Adds no waveform distortion | No electrical isolation; add a surge protection device |
Add a surge protection device ahead of the stabilizer, since a servo stabilizer gives no electrical isolation.
Oil cooled servo stabilizers are used where loads are heavy, run for long hours, or sit in rooms that are hot, dusty or humid. Typical users are factories and process plants, hospitals, hotels, malls, office complexes, cold storage and water bottling plants. They protect CNC machines, compressors, motors, lifts, chillers and control panels.
Factories and process plants: CNC machines, injection moulding, textile, pharma, printing and packaging lines, compressors and motors
Hospitals and diagnostic centres: imaging equipment, lifts, HVAC and critical power
Hotels, malls and office complexes: lifts, chillers, HVAC, lighting and IT
Cold storage and food processing: compressors and refrigeration plants
Water bottling and pumping: pumps, fillers and motor control panels
SCADA and automation: control panels, PLCs and instruments
Institutions and campuses: hostels, labs, lifts and building services
Electrical contractors, consultants and project buyers also buy from us as oil cooled servo voltage stabilizer suppliers for projects that need several units across plants, buildings or sites.
An oil cooled servo stabilizer is heavier and larger than an air cooled unit of the same rating, because of the tank and the oil it holds. Plan the room, the plinth and the route into the building before the unit arrives. SG Power confirms the dimensions, weight and oil quantity for your model in the quotation.
| What to Confirm | Why It Matters |
|---|---|
| Dimensions (length × width × height) | Room layout, cable entry and clear space for servicing |
| Weight with oil | Floor strength, plinth design and lifting at site |
| Oil quantity (litres) | First oil fill cost, top-ups and oil spill planning |
| Wheels or skid base | How the unit is moved and fixed in place |
| Cable entry and terminal position | Cable routing from the main panel and to the load |
Oil quantity rises with the rating and the input range. For reference, 100 kVA units listed online hold roughly 350 to 650 litres, so ask for the figure in writing before you plan the first fill. Use only clean, dry transformer oil of the grade we recommend; new mineral insulating oil in India is covered by IS 335.
Place an oil cooled unit in a ventilated electrical room or covered shed, on a level concrete plinth that carries its full weight with oil. Keep it out of rain and direct sun, and leave clear space around the tank for airflow and servicing. Keep flammable material away, and a suitable fire extinguisher nearby.
| Do | Avoid |
|---|---|
| A ventilated electrical room or covered shed | Open areas exposed to rain and direct sun |
| A level concrete plinth that carries the full weight | Uneven or weak floors |
| Clear space around the tank for airflow and servicing | Walls or stored items pressed against the tank |
| A spot near the main LT panel to keep cables short | Long cable runs that add voltage drop |
| A fire extinguisher suitable for electrical and oil fires nearby | Flammable materials, fuel or waste stored close by |
Have a qualified electrician install the oil cooled servo stabilizer on the mainline, after the mains and DG changeover and before the distribution board. Connect the tank and body to a proper earthing system, check the oil level before the first switch-on, and book a yearly service. Simple monthly checks keep it accurate.
Size the cables and input MCCB for the full-load current at your lowest voltage
In plants fed by an HT supply, install the stabilizer on the LT side of the distribution transformer; for correction at the transformer itself, see our HT AVR transformer
Check the oil level before switching on for the first time
Connect the tank and body to the earthing system, using earthing rods, earthing clamps and an earth pit cover
Run power cables on a cable tray, with trefoil clamps for large single-core cables
Connect any UPS after the stabilizer, never before it
Use the bypass switch only during servicing; equipment is unprotected in bypass
Fit surge protection devices ahead of the stabilizer, and lightning protection where needed
| Task | How Often | Who |
|---|---|---|
| Check input and output readings on each phase | Weekly | User |
| Check oil level and look for leaks | Monthly | User or electrician |
| Check for loose connections and heating marks | Every 6 months | Electrician |
| Test oil condition (breakdown voltage) and top up or filter | Yearly, or as advised | Trained technician |
| Inspect and replace worn carbon brushes | Yearly, or if correction slows | Trained technician |
| Full service and calibration | Yearly, or under an AMC | SG Power service |
Indian plant engineers and electricians on forums such as TechEnclave, Team-BHP and HiFiVision share similar lessons about large servo stabilizers. Measure each phase at your own site first, leave load headroom, and keep heaters and ovens off the stabilized line. Choose a supplier with quick local service, and keep a bypass switch for use until service arrives.
| Common Concern on Forums | What to Do |
|---|---|
| Voltage on one phase falls much lower than the others | Record each phase in the morning, evening and night for a few days, and ask for an unbalanced design or a custom input range. |
| Motors and compressors trip when the voltage dips | Size with a 25% margin for starting current, and set the output delay so compressors restart only after the voltage settles. |
| Stabilizer runs at full rating all day | Choose the next size up, so the unit is not loaded to 100% of its rating for long hours. |
| Heaters and ovens push the size and cost up | Wire heaters, ovens and other resistive loads on a separate, unstabilized circuit. |
| Equipment still trips after installation | Test with the stabilizer on bypass. If the problem continues, ask an electrician to check the wiring and any loose neutral. |
| A failed unit leaves the whole plant unprotected | Choose a supplier with local service and spares, and keep a bypass switch for use until service arrives. |
| Hum and motor noise near offices or wards | Place the unit in a separate electrical room, and replace worn carbon brushes on time, as they add noise. |
| Doubts about earthing | Ask an electrician to measure earth resistance and the neutral-to-earth voltage. Never use water pipes as an earth. |
Facing low voltage or frequent trips at your plant? Share your phase-wise voltage readings and load list, and we'll size the right unit.
To choose between oil cooled servo voltage stabilizer manufacturers and suppliers, first check that the unit suits your load, room and lowest site voltage. Then compare regulation, efficiency, protections, oil quantity, in-house manufacturing, testing and local service. Ask every seller the same questions, and get the answers in writing.
Do you manufacture the stabilizer, or resell another company's unit?
What input range does it cover, and is it balanced or unbalanced?
What output regulation and efficiency does it have, in writing?
Are the transformers and variacs made and tested in-house?
How much oil does the unit hold, and is the first oil fill included?
Which protections are included, and is there an adjustable time delay?
Are GST, freight, unloading, installation, a bypass switch and an input MCCB included in the price?
What ambient temperature and humidity is the unit designed for, and does that match my site?
Who services the unit near my site, and are spare parts available locally?
Oil cooled servo voltage stabilizer manufacturers design the unit, wind its transformers and variacs, and assemble and test it in their own factory. Suppliers, traders, dealers and distributors buy finished units and resell them. Some companies, such as SG Power, are both, so the buyer deals with the maker directly.
SG Power also supplies dealers, contractors and project buyers, and serves international markets. See the comparison under Buy Direct above.
Buying an oil cooled servo voltage stabilizer from SG Power takes five simple steps, from sharing your load details to installation. Our team sizes the unit and sends a written quote. The unit is then built and tested in our Ghaziabad factory before it is dispatched to your site.
Share your details: load list, phase-wise voltage readings, site location and room or shed conditions.
Get sizing and a quote: we recommend the capacity, input range and design, and send a written quote.
Confirm the order: approve the specification, dimensions and the quote.
Manufacturing and testing: the unit is manufactured and tested in our Ghaziabad factory before dispatch.
Dispatch and installation: the unit is sent to your site, with installation support on request.
Buyers choose SG Power among oil cooled servo voltage stabilizer manufacturers because it has built power products for 15+ years, winds its transformers in-house and tests every unit before dispatch. It offers balanced and unbalanced designs and custom input ranges from 60 kVA to 500 kVA, with service in 127+ cities.
| Why SG Power | Detail |
|---|---|
| Experience | 15+ years of manufacturing electrical and power products |
| Factory | 7,000 sq m in Ghaziabad, 84 machines, 250+ employees |
| Quality checks | 100% of units tested; a 3-level quality check covering 173 checkpoints |
| Certifications | ISO 9001:2015 certified organisation; RoHS certificate covering servo stabilizers; MSME and SSI registered |
| Customers | 5,937+ customers in 319+ cities; after-sales service network in 127+ cities |
| Full range | Oil cooled 60–500 kVA and air cooled from 10 kVA, plus transformers, earthing and lightning protection |
The servo stabilizer design has been tested at an NABL-accredited laboratory, and SG Power is an ISO 9001:2015 certified organisation. Learn more about SG Power.
SG Power's servo stabilizers, earthing, lightning protection and other electrical products are supplied to government bodies, PSUs and well-known companies across India. These buyers include power utilities, metro and railway projects, defence units and large manufacturers. The organisations below appear with purchase orders in SG Power's catalogue:
| Sector | Organisations |
|---|---|
| Power and utilities | POWERGRID, NTPC, BHEL, NPCL, Adani, Reliance Power |
| Infrastructure and metro | L&T, Alstom, Indian Railways, Tata (smart city project), Welspun |
| Defence and government | DRDO, Indian Army, Indian Air Force, BSF, Ministry of Defence, Airports Authority of India |
| Industry, telecom and corporate | Hindalco, JK Cement, Jubilant, Bhushan Power, BSNL |
Project Location - Karnataka
Power infrastructure project with advanced electrical solutions.
Project Location - Kanheri Hills
Defence sector electrical and protection systems.
Project Location - Hyderabad
Airport infrastructure and electrical safety solutions.
Project Location - Pune
Metro rail electrical installations and grounding systems.
Project Location - Ajmer
State electricity distribution network solutions.
Project Location - Jodhpur
Power distribution and earthing solutions.
Project Location - Bangalore, Noida
Heavy electrical and industrial power systems.
Project Location - Odisha
Steel industry electrical infrastructure solutions.
Project Location - Nashik, Chhattisgarh
Defence-grade electrical protection systems.
Project Location - Lucknow, Jabalpur
Telecom infrastructure and grounding systems.
Project Location - Ghaziabad
Government electronics and power systems.
Project Location - Sambalpur
Aluminium industry electrical safety solutions.
Project Location - Srinagar
Military-grade electrical infrastructure.
Project Location - Kerala
Railway electrification and protection systems.
Project Location - Rajasthan
Cement industry electrical solutions.
Project Location - Haryana
State power distribution infrastructure.
Project Location - Noida
Industrial electrical and safety systems.
Project Location - Khavda, Bikaner
Large-scale construction and power projects.
Project Location - Noida
Private electricity distribution systems.
Project Location - Chhattisgarh
Thermal power plant electrical solutions.
Project Location - Shahjahanpur
Power generation and infrastructure systems.
Project Location - Gurugram
Aviation electrical infrastructure solutions.
Project Location - Noida
Smart city electrical and infrastructure systems.
SG Power Products Pvt. Ltd. is rated 4.2 out of 5 by 132 buyers on IndiaMART (checked November 2026). Its Noida office is rated 4.4 out of 5 from 78 Google reviews (checked October 2026). On IndiaMART, 83% of buyers report overall satisfaction, and SG Power scores 86% for response.
| Source | Rating or Score | Based On |
|---|---|---|
| IndiaMART | 4.2 out of 5 | 132 buyer ratings |
| IndiaMART user satisfaction | 83% | IndiaMART buyer feedback |
| IndiaMART response score | 86% | IndiaMART buyer feedback |
| Google (Noida office) | 4.4 out of 5 | 78 reviews |
The ratings cover all SG Power products, not oil cooled servo stabilizers alone. Recent IndiaMART reviews come from buyers of three-phase servo controlled voltage stabilizers, earthing electrodes, lightning arresters, trefoil clamps and rectifiers.
Read SG Power reviews on IndiaMARTSG Power Products Pvt. Ltd. is among the oil cooled servo voltage stabilizer manufacturers and suppliers in Sector 62, Noida, with its own factory in Ghaziabad. It supplies and services oil cooled units across Delhi NCR, Uttar Pradesh and the rest of India. Buyers in Delhi, Noida and Gurugram get local sizing and service.
Looking for oil cooled servo voltage stabilizer suppliers in Delhi NCR or an oil cooled servo stabilizer in Noida? Our Sector 62 office and Ghaziabad factory serve the whole NCR, including Greater Noida, Sahibabad, Okhla, Faridabad and Gurugram. Searching for oil cooled servo voltage stabilizer manufacturers near me, servo stabilizer suppliers near me or servo voltage stabilizer manufacturers in Ghaziabad? Contact us for local sizing. We also supply customers in 319+ cities, including Noida, Delhi, Gurugram, Ghaziabad, Faridabad, Lucknow, Kanpur, Jaipur, Ahmedabad, Mumbai, Pune, Hyderabad, Bengaluru and Chennai.
SG Power Products Pvt. Ltd.
17th Floor, L-17-1714B, The Iconic Corenthum, Plot No. A-41, Sector 62, Noida, Gautam Buddha Nagar, Uttar Pradesh 201309
Phone: +91-8929722150 · Email: enquiry@sgpower.co.in · Contact page
These are the main facts about SG Power oil cooled servo voltage stabilizers, in short form for quick reference:
What it is: a servo voltage stabilizer whose transformers are immersed in insulating oil (ONAN cooling).
Range: 25 kVA to 500 kVA, three phase, four wire; balanced or unbalanced.
Output: 410V regulated output within ±1%, 97% efficiency tested to IS 2026 (Part 1), 100% load continuously.
Sizing rule: running kW ÷ 0.8 × 1.25 = kVA needed; choose the next size up.
Best site: heavy, continuous loads and hot, dusty or humid rooms; air cooling for small, clean-room loads.
Maintenance: monthly oil level and leak checks, and yearly oil testing, brush inspection and calibration.
Price: on request for every capacity, after a free load check of your site.
Ratings: 4.2 out of 5 from 132 buyers on IndiaMART, and 4.4 out of 5 from 78 Google reviews.
Maker and supplier: SG Power Products Pvt. Ltd., Noida, one of the oil cooled servo voltage stabilizer manufacturers and suppliers in India, with its own factory in Ghaziabad.
* Prices are indicative. For the latest price, contact SG Power.
For the latest factory price, contact SG Power, direct oil cooled servo voltage stabilizer suppliers, with your load list, phase-wise voltage readings, site location and room or shed conditions. From 25 kVA for a workshop to 500 kVA for a large plant, we'll size it, build it to your site and support it after installation.
The specifications on this page come from SG Power's product catalogue (February 2026), its KNEUTRON servo stabilizer catalogue and its oil cooled datasheets, checked in November 2026. Features and specifications may change as the technology is improved, so the final values are confirmed in our quotation.
SG Power Products Pvt. Ltd., product catalogue (February 2026): oil cooled model list, range, features, transformers, quality checks, certifications and clients
SG Power KNEUTRON servo stabilizer catalogue (air and oil cooled): input bands, output voltage, regulation, efficiency, output delay and protections
IS 9815 (Part 1) and IS 335, published by the Bureau of Indian Standards
Voltage regulator, Wikipedia: background on electromechanical voltage regulators
Background reading: voltage regulator and transformer oil on Wikipedia.