Written and reviewed by the SG Power technical team at SG Power Products Pvt. Ltd. | Last updated: 4 November 2026
Among 40 kVA servo stabilizer manufacturers in India, SG Power Products Pvt. Ltd. makes the three-phase 40 kVA air cooled servo stabilizer in its own Ghaziabad factory. Each unit holds the output within ±1% when the mains rises or falls. It safely runs about 25.6 kW of connected load.
As 40 kVA servo stabilizer suppliers in Noida, we sell direct, not through traders. A 40 kVA unit sits between our 30 kVA and 50 kVA models, and comes in a standard and a wide input range for low-voltage areas. Factory owners, hospitals, hotels, schools, office buildings, housing societies and contractors across India buy from us at factory prices.
In short, SG Power's 40 kVA servo stabilizer is a three-phase, air cooled KNEUTRON unit, listed in its catalogue in a standard and a wide input range. It gives 410V ±1% phase-to-phase output at 97% efficiency, carries about 55.6 A per phase, and safely runs about 25.6 kW.
| Brand | KNEUTRON, made by SG Power Products Pvt. Ltd. in India |
| Capacity | 40 kVA (32 kW at 0.8 power factor) |
| Safe running load | About 25.6 kW, with a 25% margin |
| Phase | Three phase |
| Current | About 55.6 A per phase at 415V |
| Cooling | Air cooled |
| Output | 410V ±1% phase to phase and 230V ±1% phase to neutral, 97% efficiency tested to IS 2026 (Part 1), 100% load continuously (SG Power datasheets) |
| Models | 40 kVA Air Cooled, 170–280V per phase; 40 kVA Air Cooled wide range, 140–280V per phase (SG Power datasheets) |
| Price | Price on request |
| Supply | Across India, from Noida and the Ghaziabad factory; service in 127+ cities |
* Prices are indicative. For the latest price, contact SG Power.
Source: SG Power product catalogue (February 2026), the KNEUTRON servo stabilizer catalogue and SG Power's 40 kVA air cooled datasheets. Load and current figures are calculated at 415V and a 0.8 power factor. Checked November 2026.
Buy your 40 kVA servo stabilizer direct from SG Power, the manufacturer that designs each unit, winds its transformers and tests it before dispatch. We can also set its input range and design to suit your site. You also get factory pricing and free sizing from your load list.
| From SG Power (Manufacturer) | From a Trader or Reseller |
|---|---|
| Factory pricing, no middleman margin | Reseller margin added |
| Standard or wide input range, matched to your site voltage | Stock model, whatever is available |
| Sizing by the team that builds the unit | Advice varies by seller |
| 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 |
A 40 kVA servo stabilizer is an automatic voltage regulator rated to carry 40 kilovolt-amperes of load while holding the output steady through voltage fluctuation. A microcontroller senses the voltage, and a motor-driven variac (a variable autotransformer) and buck-boost transformer add or remove volts. SG Power's 40 kVA unit is three phase and air cooled.
It is also called a 40 kVA servo voltage stabilizer, a 40 kVA servo controlled voltage stabilizer or a 40 kVA 3 phase servo stabilizer. Other names are a 40 kVA automatic voltage regulator (AVR) or simply a 40kva stabilizer. Some buyers spell it servo stabiliser. Each of the three phases has its own variac, buck-boost transformer and stepper motor. In an unbalanced design, each phase is corrected on its own. To see how the correction works step by step, read how a servo stabilizer works.
A 40 kVA servo stabilizer runs about 32 kW at full rating, at a 0.8 power factor. For daily use, keep the running load to about 25.6 kW, so a 25% margin covers motor starting current. Each phase then carries up to about 8.5 kW, and the unit draws about 55.6 A per phase.
| Figure | 40 kVA Three Phase |
|---|---|
| Full rating | 40 kVA, or about 32 kW at 0.8 power factor |
| Safe running load (25% margin) | About 25.6 kW |
| Running load per phase | About 8.5 kW |
| Full-load current | About 55.6 A per phase at 415V |
| Fits running loads from | About 19.2 kW to 25.6 kW |
Safe running load = 40 kVA × 0.8 power factor ÷ 1.25. Current = 40,000 ÷ (1.732 × 415).
Typical loads a 40 kVA unit can carry, within about 25.6 kW in total:
Small or mid-size factory: two or three CNC machines, or one 30 HP motor with lighting
Hospital or nursing home: X-ray, CT support equipment, lab analysers, OT lights, computers and ACs
Office building, showroom or small hotel: servers, lifts, lighting and twelve to fourteen split ACs
Housing society common areas: lifts, water pumps, corridor lighting and security systems
To check whether 40 kVA is the right size, add the kW of every load that runs at the same time and divide by a 0.8 power factor. Then add a 25% margin and choose the next size up. A 40 kVA unit fits a running load of about 19.2 kW to 25.6 kW.
List the running load: add the kW of the machines, ACs and appliances that run together.
Convert kW to kVA: divide by 0.8.
Add a 25% margin: multiply by 1.25 for starting current and growth.
Choose the size: if the result is between 30 and 40 kVA, choose 40 kVA; above 40 kVA, choose 50 kVA.
Formula: Required kVA = running load (kW) ÷ 0.8 × 1.25
For example, a 24 kW running load needs 24 ÷ 0.8 × 1.25, or 37.5 kVA, so a 40 kVA servo stabilizer fits.
For motors, size from the nameplate full-load current, which already includes motor efficiency; efficiency classes are set out in IS 12615, published by the Bureau of Indian Standards. Size the stabilizer on the load it protects, not on the rating of your distribution transformer.
Not sure which size fits? Send your load list, and we'll check it free.
Choose 30 kVA for running loads up to about 19.2 kW, 40 kVA for about 19.2 to 25.6 kW, and 50 kVA for up to about 32 kW. All three are SG Power air cooled catalogue models. The 40 kVA unit fits loads that fall between 30 kVA and 50 kVA.
| 30 kVA | 40 kVA | 50 kVA | |
|---|---|---|---|
| Safe running load | About 19.2 kW | About 25.6 kW | About 32 kW |
| Current per phase (415V) | About 42 A | About 56 A | About 70 A |
| Phase | Three phase | Three phase | Three phase |
| Catalogue input band (air cooled) | 170–280V or 140–280V per phase | 170–280V or 140–280V per phase | 170–280V or 140–280V per phase |
When to choose 50 kVA instead: pick 50 kVA if your load is close to 25.6 kW or you plan to add machines or ACs within two years. It also suits sites with large direct-on-line motors. For loads under about 19.2 kW, the 30 kVA unit is enough. The 50 kVA unit is the largest air cooled model. Above it, choose an oil cooled unit, such as the 75 kVA oil cooled model; the oil cooled range runs up to 500 kVA.
The 40 kVA servo stabilizer price depends on the input range, balanced or unbalanced design, protections and extras. Every 40 kVA unit is priced on request after a free load check; the wide-range model costs more, because it needs a larger variac and transformer. You get a written quote for the exact model, with GST, freight and installation shown separately.
| SG Power Model | Phase | Price |
|---|---|---|
| 40 kVA air cooled (170–280V per phase) | Three phase | Price on request |
| 40 kVA air cooled, wide range (140–280V per phase) | Three phase | Price on request |
| 30 kVA air cooled | Three phase | Price on request |
| 50 kVA air cooled | Three phase | Price on request |
GST, freight and installation are shown separately in the quote. * Prices are indicative. For the latest price, contact SG Power.
When you compare a 40 kVA stabilizer price across sellers, check that every quote is for a three-phase servo unit with the same input range and design.
Online 40 kVA prices vary widely because sellers list very different products under the same rating. Some are single-phase appliance stabilizers, others are three-phase servo units with narrow or wide input ranges. Compare the full specification, not the headline price, before you decide.
| What Differs Between Listings | Why It Matters |
|---|---|
| Single phase or three phase | A three-phase unit has three sets of variac, transformer and motor |
| Input voltage range | A wider range needs a larger transformer |
| Balanced or unbalanced design | Unbalanced units correct each phase separately |
| Regulation and efficiency | ±1% regulation and the efficiency figure, 97% tested to IS 2026 (Part 1), should be stated in writing |
| Protections and time delay | Single phasing, phase reversal and overload cut-offs protect motors |
| Testing and service | Routine testing and local service affect long-term cost |
| GST, freight and installation | Some prices leave these out |
Want a 40 kVA servo stabilizer price for your site? Share your load and lowest voltage, and we'll send a written quote.
A 40 kVA single phase servo stabilizer would draw about 174 A at 230V, far more than single-phase home and shop connections are designed to carry. That is why SG Power builds its 40 kVA units as three phase. For single-phase sites, the 15 kVA unit is our largest standard single-phase model.
Three-phase supply: choose the 40 kVA three-phase unit, balanced or unbalanced. See all 3 phase stabilizers.
Single-phase supply, load up to about 9.6 kW: choose the 15 kVA single-phase unit.
Single-phase supply, heavier load: ask your electricity board about a three-phase connection, then choose a three-phase stabilizer. The Electricity (Rights of Consumers) Rules, 2020 set out how consumers apply for a new connection or a change in sanctioned load.
SG Power's datasheets list the 40 kVA air cooled servo stabilizer in two input bands: a standard 170–280V per phase and a wide 140–280V per phase, both 340–480V phase to phase. Both hold the output at 410V ±1% phase to phase. Choose the 40 kVA wide range servo stabilizer where the voltage often falls below 170V on any phase.
| Model | Input Band per Phase | Phase to Phase | Choose This When |
|---|---|---|---|
| 40 kVA Air Cooled | 170–280V | 340–480V | Voltage falls in the evening or at the end of a long line, but rarely below 170V |
| 40 kVA Air Cooled, wide range | 140–280V | 340–480V | Voltage often drops below 170V, as at the end of rural or industrial lines |
| Custom range | On request | On request | Your lowest recorded voltage is outside both bands |
Many online listings quote “90–300V” ranges. Those are single-phase appliance or mainline stabilizers, not three-phase servo units. Record your lowest and highest voltage on each phase for a few days, and share the readings when you ask for a quote.
Choose a balanced 40 kVA servo stabilizer when three-phase motors and machines load each phase equally. Choose an unbalanced servo stabilizer design when homes, clinics or offices have ACs and lights spread unevenly across the phases. SG Power makes the 40 kVA unit in both designs.
| Design | How It Corrects | Best For |
|---|---|---|
| Balanced | Corrects all three phases together | CNC machines, motors and production lines |
| Unbalanced | Corrects each phase on its own | Homes, villas, clinics, offices and showrooms with single-phase loads |
In an unbalanced home, size on the most heavily loaded phase. Each phase of a 40 kVA unit carries up to about 13.3 kVA, or about 8.5 kW with the 25% margin.
SG Power's 40 kVA servo stabilizer specifications follow its KNEUTRON air cooled range, with the guaranteed figures taken from the 40 kVA datasheets. The unit regulates the output within ±1% at 97% efficiency, with an adjustable output delay of 3 to 200 seconds. Any other input range can be built to customer specification to suit the site.
| Parameter | Specification |
|---|---|
| Rated capacity | 40 kVA, three phase |
| Input voltage | 340–480V phase to phase; 170–280V per phase (standard) or 140–280V per phase (wide range) (SG Power datasheets); custom ranges on request |
| Output voltage | 410V ±1% phase to phase and 230V ±1% phase to neutral (SG Power datasheets); set point adjustable to 380, 400 or 415V |
| Full-load current | About 55.6 A per phase at 415V |
| Regulation | ±1% |
| Efficiency | 97%, tested as per IS 2026 (Part 1):1977 (SG Power datasheets) |
| Output frequency | 50 Hz ±3% |
| Output delay | 3–200 seconds, adjustable |
| Control | KNEUTRON microcontroller with a high sampling rate; true RMS sensing of input and output without a control transformer |
| Motor | High-efficiency, high-torque AC stepper motor |
| Transformers | Dimmer (variac) and buck-boost transformers rated for 100% load current; 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 |
| Winding | Pure copper winding (SG Power datasheets) |
| Cooling | Air cooled |
| Housing | Powder coated CRC sheet, floor mounting (SG Power datasheets) |
| Insulation resistance | 7 mega-ohms at 500 V DC, at not more than 45°C (SG Power datasheets) |
| Leakage current | 32 micro-amperes under normal operating conditions, tested as per IS 302-1:1979 (SG Power datasheets) |
| Design | Balanced or unbalanced |
| Duty | 100% load, continuous |
| Test certification | NABL tested (SG Power datasheets) |
| Applicable standard | IS 9815 (Part 1)-1984 (SG Power datasheets) |
| Catalogue models | 40 kVA Air Cooled, 170–280V per phase; 40 kVA Air Cooled, 140–280V per phase |
| 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 40 kVA air cooled datasheets. Other values come from the KNEUTRON servo stabilizer catalogue. Features and specifications may change as the technology is improved, so the final values are confirmed in our quotation. The IS standards are published by the Bureau of Indian Standards.
Every SG Power 40 kVA servo stabilizer is a microcontroller-based digital servo stabilizer, with a KNEUTRON controller, a front-panel display and ±1% regulation. Its protections cut off the output on over-voltage, under-voltage, overload, phase reversal and single phasing, with an adjustable time delay. Calibration is done on a touchpad.
The display shows phase-to-neutral and phase-to-phase voltage, frequency and the output current of each phase. Start, Stop and Menu keypads sit on the front panel. You can set the output voltage and input band, and choose manual or automatic start and stop.
| Protection | What It Guards Against |
|---|---|
| Over-voltage cut-off | High mains voltage reaching machines and appliances |
| Under-voltage cut-off | Very low voltage that overheats motors and compressors |
| Overload cut-off | Load above the set limit; the output restarts once the load is reduced and Start is pressed |
| Output delay (3–200 seconds) | Compressor and motor damage when power returns after a cut |
| Trip time delay (variable settings) | Nuisance tripping on very short voltage swings |
| Phase reversal cut-off | Wrong phase sequence, which can run motors backwards |
| Single phasing protection | Loss of one phase, which can burn out three-phase motors |
Need a 40 kVA servo stabilizer with a custom input range? We build it to your site conditions.
This page covers SG Power's 40 kVA air cooled servo stabilizer, which suits a clean, dry and ventilated indoor room. If your site is dusty or hot, or runs heavy loads round the clock, choose an oil cooled unit instead. SG Power's catalogue also lists 40 kVA oil cooled models in both input bands.
| Site | Recommended |
|---|---|
| Clean, ventilated electrical room, office, hospital or school | 40 kVA air cooled |
| Dusty workshop, cement or flour mill area | 40 kVA oil cooled |
| Hot room near a DG set, boiler or furnace | 40 kVA oil cooled |
| 24×7 heavy load close to the rating | 40 kVA oil cooled, or 50 kVA |
For a full comparison, see SG Power's air cooled servo stabilizers and oil cooled servo stabilizers.
A 40 kVA servo stabilizer is used where the load is too big for 30 kVA but well under 50 kVA. It protects factories, hospitals, hotels, offices and housing society common areas from high and low voltage, voltage dips during motor starts, and damage to compressors, electronics and CNC controls.
| Application | What It Protects |
|---|---|
| Small and mid-size factories | Two or three CNC machines, a VMC, compressors and lighting |
| Housing society common areas | Lifts, water pumps, corridor lighting and security systems |
| Small hotels and guest houses | Room ACs, lifts, kitchen equipment and lighting |
| Hospitals, nursing homes and diagnostic centres | X-ray, lab analysers, OT lights, computers and ACs; pair with an isolation transformer for sensitive medical loads |
| Offices, banks and showrooms | Computers, servers, lighting and split ACs |
| Cold storage rooms and bakeries | Compressors, oven controls and mixers |
| Water bottling plants | Filling, capping and RO machines |
| Lifts and SCADA-based systems | Lift controllers and automation panels |
| Printing and packaging | Printing presses and sealing machines |
| Schools, labs and research centres | Computer labs, scientific and medical equipment |
| Telecom, IT and textile units | Telecom equipment, server rooms and textile machines |
A 40 kVA stabilizer for home use is rarely needed. It suits only very large estates or farmhouses with twelve or more ACs, lifts and pumps running together, or a housing society's common areas. Most homes need 10 to 20 kVA, so size on your real running load per phase first.
Have a qualified electrician install the 40 kVA servo stabilizer on the mainline, after the meter or DG changeover and before the distribution board. Connect it to a proper earthing system, keep the vents clean and book a yearly maintenance service. Simple checks keep it accurate.
Size the cables and breaker for about 56 A per phase, allowing for higher input current at low voltage, especially on the wide-range model
Connect the body to the building's earthing system, with earthing rods, earthing clamps and an earth pit cover
Fit surge protection devices ahead of the stabilizer, and lightning protection where needed; a stabilizer does not stop lightning spikes
Connect any UPS or inverter after the stabilizer, never before it
Place it indoors with clear space around the vents, away from sun, rain, dust and steam
Use the bypass switch only during servicing
| Task | How Often | Who |
|---|---|---|
| Check input and output readings | Weekly | User |
| Clean dust from vents and fans | Every 3 months | User or electrician |
| Check for loose connections and heating marks | Every 6 months | Electrician |
| Inspect carbon brushes | Yearly, or if correction slows | Trained technician |
| Full service and calibration | Yearly, or under an AMC | SG Power service |
For wiring and placement in detail, see the servo stabilizer installation guide.
Indian buyers and electricians on TechEnclave, Team-BHP and HiFiVision share clear lessons that apply to 40 kVA and other large three-phase stabilizers. Measure your real voltage and load first, leave headroom rather than running at 100%, and keep geysers off the stabilized line. Choose a supplier with quick local service.
| Common Concern on Forums | What to Do |
|---|---|
| A buyer was quoted a 30 kVA three-phase unit for a house with unbalanced loads (TechEnclave) | Size on the real running load of each phase; homes rarely need 40 kVA, which carries up to about 8.5 kW per phase |
| A large home worked out to about 20 kVA, and the owner chose 25 kVA for headroom (TechEnclave) | Leave headroom so the unit does not run at 100% all day; if your load is near 25.6 kW, choose 50 kVA |
| Three-phase or single-phase servo for a whole house? | Ask how the unit behaves if one phase fails; SG Power units cut off the output and restart after a delay |
| A line fault or lightning damaged appliances | Fit surge protection ahead of the stabilizer; no stabilizer can stop high-voltage faults |
| Voltage differs from phase to phase, so some homeowners fit three single-phase stabilizers | An unbalanced 40 kVA three-phase unit corrects each phase on its own, in one cabinet, with single phasing protection for three-phase motors |
| One phase reads about 190V by day and about 150V at night | Log each phase for several days, including nights; if any reading falls below 170V, choose the 40 kVA wide-range (140–280V) model |
Forum threads checked November 2026. Prices and brand names from the threads are not used here.
Facing low voltage or frequent trips at your site? Share your readings and load list, and we'll size the unit.
To choose between 40 kVA servo stabilizer manufacturers and suppliers, first confirm that the unit suits your load, phase, room and lowest site voltage. Then compare regulation, efficiency, protections, in-house manufacturing, testing and local service. Ask every seller the same questions, in writing.
Do you manufacture the 40 kVA unit, or resell another company's model?
Is it three phase, and what input range does it cover?
Is it balanced or unbalanced?
What regulation and efficiency does it give, in writing?
Which protections and time delay are included?
Are the transformers and variacs made and tested in-house?
Are GST, freight, installation and a bypass switch included?
Who services the unit near my site?
Manufacturers of 40 kVA servo stabilizers design the unit, wind its transformers and variacs, and assemble and test it in their own factory. Suppliers, dealers and traders buy finished units and resell them. SG Power is both, so you deal with the maker directly, including for custom input ranges and designs.
For more on choosing a maker, read about automatic servo voltage stabilizer manufacturers in India.
Buying a 40 kVA servo stabilizer from SG Power takes five steps, from sharing your load details to installation. Our team checks the size, recommends the input range and design, and sends a written quote. The unit is then built and tested in our Ghaziabad factory before dispatch.
Share your details: load list, phase, lowest and highest site voltage, room conditions and location.
Get sizing and a quote: we confirm whether 30, 40 or 50 kVA suits you, and which input band, and send a written quote.
Confirm the order: approve the specification and the quote.
Manufacturing and testing: the unit is manufactured and tested in our Ghaziabad factory.
Dispatch and installation: the unit is sent to your site, with installation support on request.
Ready to start? Send your load list today.
Buyers choose SG Power among 40 kVA servo stabilizer manufacturers because it has built power products for 15+ years, winds its transformers in-house and tests every unit before dispatch. Its catalogue lists 40 kVA in standard and wide input ranges, in balanced and unbalanced designs, 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 |
| Retention | 89% customer retention and 93% dealer retention, with 1,319 dealers |
| Range | 10 kVA to 500 kVA (air cooled from 10 kVA to 50 kVA, oil cooled from 75 kVA to 500 kVA) |
| Other products | 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. See the full range on our servo voltage stabilizer page, compare air cooled, oil cooled and 3 phase stabilizer models, or 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 from 133 buyer ratings on IndiaMART (checked 4 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 | 133 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 40 kVA 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 40 kVA servo stabilizer manufacturers and suppliers in Sector 62, Noida, with its own factory in Ghaziabad. It supplies and services 40 kVA units across Delhi NCR, Uttar Pradesh and the rest of India. Buyers in Delhi, Noida and Gurugram get local sizing and service.
Looking for 40 kVA servo stabilizer suppliers in Delhi NCR, a 40 kVA servo stabilizer in Noida or 40 kVA servo stabilizer manufacturers near me? Our Sector 62 office and Ghaziabad factory serve the whole NCR, including Greater Noida, Sahibabad, Okhla, Faridabad and Gurugram. We also supply customers in 319+ cities, including Noida, Delhi, Gurugram, Ghaziabad, Lucknow, 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
Want a 40 kVA servo stabilizer delivered to your site? Ask for a quote, and we'll confirm the model and price.
These are the main facts about SG Power's 40 kVA servo stabilizer, in short form for quick reference:
What it is: a three-phase, air cooled servo voltage stabilizer rated 40 kVA, listed in SG Power's catalogue.
Load: about 32 kW at full rating; keep the running load to about 25.6 kW.
Current: about 55.6 A per phase at 415V.
Output: 410V ±1% phase to phase, 230V ±1% phase to neutral, 97% efficiency tested to IS 2026 (Part 1), 100% load continuously.
Input: 170–280V per phase, or 140–280V per phase on the wide-range model; custom ranges on request.
Fits: running loads of about 19.2 to 25.6 kW; above that, choose 50 kVA.
Price: on request, after a free load check.
Ratings: 4.2 out of 5 from 133 buyer ratings on IndiaMART, and 4.4 out of 5 from 78 Google reviews.
Maker and supplier: SG Power Products Pvt. Ltd., Noida, one of the 40 kVA servo stabilizer manufacturers and suppliers in India, with its own factory in Ghaziabad.
* Prices are indicative. For the latest price, contact SG Power.
* Prices are indicative. For the latest price, contact SG Power.
For the latest factory price, contact SG Power, direct 40 kVA servo stabilizer suppliers, with your load list, phase, room conditions and lowest site voltage. We'll confirm whether 30, 40 or 50 kVA and which input band suit your site, build the unit for 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 40 kVA air cooled datasheets, checked in November 2026. Load and current figures are calculated at 415V and a 0.8 power factor. Final values are confirmed in our quotation.
SG Power Products Pvt. Ltd., product catalogue (February 2026): range, features, transformers, quality checks, certifications and clients
SG Power KNEUTRON servo stabilizer catalogue: input bands, output voltage, regulation, efficiency, output delay and protections
Bureau of Indian Standards: IS 9815 (Part 1), IS 5142, IS 2026 and IS 12615
Voltage regulator, Wikipedia: background on electromechanical voltage regulators
Autotransformer, Wikipedia: background on the variac (variable autotransformer)
Indian user forums (checked November 2026): TechEnclave, HiFiVision and Team-BHP threads on whole-house and three-phase servo stabilizers