SG Power Products Pvt. Ltd. is one of the Noida-based 75 kva servo stabilizer manufacturers, building oil-cooled three-phase models in its own Ghaziabad factory. A 75 kva servo stabilizer holds the voltage steady for a running load of up to about 48 kW. It suits factories, production lines, hospitals, hotels, malls and commercial buildings.
As direct 75 kva servo stabilizer suppliers, we sell to end users, contractors and project buyers across India with no trader's margin.

| Capacity | 75 kVA (75,000 VA, about 60 kW at a 0.8 power factor) |
| Recommended running load | Up to about 48 kW, allowing a 25% safety margin |
| Phase | Three phase, four wire (415V supply) |
| Cooling | Oil cooled |
| Input range | 340–480V phase to phase (170–280V per phase); custom ranges on request |
| Output voltage | 410V ±1% (P-P) and 230V ±1% (P-N); set point adjustable to 380, 400 or 415V |
| Full-load current | About 104 A per phase |
| Regulation and efficiency | ±1% regulation, 97% efficiency tested to IS 2026 (Part 1) |
| Output delay | Adjustable from 3 to 200 seconds |
| Control | KNEUTRON microcontroller-based, true RMS sensing, digital display |
| Approximate price | From about ₹1,25,000 + GST |
| Testing | 100% units tested, 173 checkpoints, NABL lab-tested design |
Prices are indicative. For the latest price, contact SG Power.
Buy your 75 kVA servo stabilizer direct from the manufacturer, SG Power, which designs, winds and tests every unit for factories, hospitals and buildings. You get factory pricing, a free load and site-voltage check, and an input range, design and protections matched to your site.
| 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 |
| Input range and balanced or unbalanced design built to order | Mostly stock models only |
| Transformers wound and tested in-house | Source of parts often unknown |
| Every unit tested through 173 checkpoints | Testing depends on the source |
| Service support in 319+ cities | Depends on the reseller |
A 75 kVA servo stabilizer is an oil-cooled, three-phase voltage stabilizer rated for 75,000 VA, or about 60 kW at a 0.8 power factor. A motor-driven variac and buck-boost transformer on each phase hold the output at 410V ±1% phase to phase, and 230V ±1% phase to neutral, when the mains rises or falls. One unit protects a whole factory or building.
It is also called a 75 kva servo voltage stabilizer, a 75 kva 3 phase servo stabilizer or an automatic voltage regulator (AVR). Buyers also search for a 75 kVA voltage stabilizer or a 75 kVA automatic voltage stabilizer. Other names are a 3 phase voltage stabilizer of 75 kVA and a 75 kVA servo controlled voltage stabilizer, also spelt stabiliser. The variac is a variable autotransformer, often called a dimmer, turned by a servo motor. It handles everyday voltage fluctuations without steps, giving continuous voltage stabilisation. SG Power's KNEUTRON range covers 10 to 500 kVA within its servo voltage stabilizer lineup.
The 75 kVA servo stabilizer price in India typically starts from about ₹1,25,000 + GST for a three-phase, oil-cooled model with a standard input range, as the price list below shows. Wider input ranges, unbalanced designs and extras cost more.
| 75 kVA Model | Input Range (per phase) | Best For | Approximate Price (+ GST) |
|---|---|---|---|
| Three phase, oil cooled, standard range | 170–280V | Factories, hospitals, hotels and buildings with normal supply | starts from ₹1,25,000 |
| Three phase, oil cooled, wide range (custom) | e.g. 140–280V | Industrial areas at the end of long supply lines | Price on request |
| Three phase, oil cooled, unbalanced design | 170–280V | Buildings where each phase feeds different single-phase loads | Price on request |
Prices exclude GST (servo stabilizers are generally billed at 18%), freight and installation. Prices are indicative. For the latest price, contact SG Power.
Online, 75 kVA servo stabilizer prices vary from about ₹1,00,000 to ₹1,50,000 or more, because sellers list different designs under the same rating. Narrow and wide input ranges, balanced and unbalanced designs, copper or aluminium windings, and prices with or without GST all appear side by side.
| Price Band (Online Listings) | What You Usually Get |
|---|---|
| Under ₹1,00,000 | Lighter builds, narrow input ranges, or prices shown before GST and freight |
| ₹1,00,000 – ₹1,30,000 | Standard three-phase oil-cooled models |
| ₹1,30,000 – ₹1,60,000 | Wider input ranges, unbalanced designs or heavy-duty builds |
| Over ₹1,60,000 | Special ranges, extras such as data logging, and prices that include GST and delivery |
These bands describe what other sellers list online, not SG Power's own prices. Prices are indicative. For the latest price, contact SG Power.
Compare the input range, design and total delivered cost, not just the headline 75 kVA 3 phase servo stabilizer price.
Three things mainly affect the 75 kVA stabilizer price: input voltage range, balanced or unbalanced design, and build quality. Wider ranges and unbalanced correction cost more. Core and winding quality, protections, testing, GST, freight and installation explain the rest of the gap between two quotes.
Input voltage range: wider ranges need larger transformers
Balanced or unbalanced: unbalanced models correct each phase on its own
Winding and core: good windings and CRGO cores run cooler and last longer
Extras: data logging, password-protected settings, built-in surge protection and an automatic bypass add to the price
A 75 kVA unit for low-voltage areas can be built with a wider input range, such as 140–280V per phase, instead of the standard 170–280V. It suits industrial areas where voltage often drops below 170V per phase. A standard stabilizer would cut off there, while a wide-range model keeps correcting.
Record the lowest voltage on each phase over a few days, including peak hours. If it stays above 170V, the standard range is enough and costs less.
A 75 kVA servo stabilizer can run a load of about 60 kW at full rating. For safe everyday use, keep the running load to about 48 kW, which leaves a 25% margin for the surge when motors, compressors and lifts start. Spread the load evenly across the three phases.
Add up the rated power (kW) of every machine and appliance that runs at the same time.
Divide by the power factor, usually 0.8, to convert kW to kVA.
Multiply by 1.25 to add a 25% margin for motor starting current.
Choose the next standard rating: from 61 to 75 kVA means a 75 kVA unit; above it, choose 100 kVA.
Sizing formula: Required kVA = (running load in kW ÷ 0.8) × 1.25
If you know the current instead: kVA ≈ 0.72 × the highest current per phase at 415V. About 104 A on the most loaded phase means 75 kVA.
Mixed single-phase and three-phase loads: add each single-phase load to the phase it is connected to, find the most heavily loaded phase, and size for three times that phase's load.
For a whole building: check the sanctioned (contract) load on your electricity bill. A mainline stabilizer is often sized at about 1.2–1.3 times the sanctioned load in kVA, then checked against the running load.
| Example Load | Running Load | Is 75 kVA Right? |
|---|---|---|
| Machine shop: four to six mid-size CNC machines and a compressor | about 42–46 kW | Yes |
| Production line: motors, conveyors, lighting | about 45 kW | Yes |
| Hospital: equipment, ACs, lifts, lighting | about 40 kW | Yes |
| Hotel or mall floor: ACs, lifts, kitchen, lighting | about 45 kW | Yes |
| Commercial building: three lifts, pumps and common areas | about 40 kW | Yes |
Not sure about your load? Send us your machine or appliance list and we will confirm whether 75 kVA is the right capacity for your site.
Get Free Sizing AdviceChoose the size by running load. Use 60 kVA for up to about 38.4 kW, 75 kVA for up to about 48 kW and 100 kVA for up to about 64 kW. A 45 kW load needs about 70.3 kVA, so 75 kVA is the right size; buying the right size the first time avoids overload trips.
| 60 kVA | 75 kVA | 100 kVA | |
|---|---|---|---|
| Full rating (0.8 power factor) | about 48 kW | about 60 kW | about 80 kW |
| Safe running load (25% margin) | about 38.4 kW | about 48 kW | about 64 kW |
| Current per phase at 415V | about 83 A | about 104 A | about 139 A |
| SG Power cooling | Oil cooled | Oil cooled | Oil cooled |
| Approximate price (+ GST) | starts from ₹1,00,000 | starts from ₹1,25,000 | starts from ₹1,90,000 |
Prices are indicative. For the latest price, contact SG Power.
Compare the 50 kVA servo stabilizer, the full oil cooled range and the servo stabilizer price list. For a whole plant on an HT supply, an HT AVR transformer can regulate voltage at the source instead.
Not sure whether 75 kVA is enough? Share your machine or appliance list, and we'll recommend the right size.
A 75 kVA servo stabilizer is oil cooled because its transformers carry about 104 A per phase, and oil removes that heat far better than air. SG Power's air-cooled range stops at 50 kVA, so every 75 kva oil cooled servo stabilizer it builds suits continuous, round-the-clock and heavy industrial duty.
| What Oil Cooling Gives You | What to Plan For |
|---|---|
| Steady temperature under continuous full load | A firm, level base for a heavy unit (oil-cooled 75 kVA units listed online weigh about 350 kg) |
| Better tolerance of hot, dusty and humid sites | Oil level checks every 3 months |
| Longer insulation life in 24×7 operation | Yearly oil testing and top-up with transformer oil to IS 335 |
| Suits factories, cold storage and process lines | Space around the tank for airflow and servicing |
Transformer oil: top up only with transformer oil to IS 335, and have the oil's breakdown voltage tested once a year.
A balanced 75 kVA servo stabilizer corrects all three phases together, which suits three-phase motors and production lines that load each phase equally. An unbalanced model corrects each phase on its own, which suits hospitals, hotels and buildings where each phase feeds different single-phase loads, such as ACs and lighting.
| Balanced | Unbalanced | |
|---|---|---|
| How it corrects | All phases together | Each phase separately |
| Best for | Motors, CNC machines, conveyors, compressors | Hospitals, hotels, malls, commercial buildings |
SG Power makes both the balanced and the unbalanced 75 kVA servo stabilizer. One cabinet with three per-phase sections usually costs less and takes less space than three separate single-phase units.
The 75 kVA servo stabilizer specifications below are for SG Power's oil-cooled, three-phase, four-wire model. It accepts 170–280V per phase as standard, with wider ranges built to order, and holds 410V ±1% phase to phase at 97% efficiency, tested as per IS 2026 (Part 1):1977. The output delay is adjustable from 3 to 200 seconds.
| Parameter | Specification |
|---|---|
| Capacity | 75 kVA, three phase, four wire |
| Input voltage range | 340–480V phase to phase (170–280V per phase); custom ranges on request |
| Output voltage | 410V ±1% (P-P), 230V ±1% (P-N); settable to 380, 400 or 415V |
| Regulation | ±1% |
| Efficiency | 97%, tested as per IS 2026 (Part 1):1977 |
| Output frequency | 50 Hz ±3% |
| Output delay | 3–200 seconds, adjustable |
| Cooling | Oil cooled, transformer immersed in oil |
| Control | KNEUTRON microcontroller, true RMS sensing |
| Motor | High-torque AC stepper motor |
| Winding | Pure copper winding |
| Housing and mounting | Powder coated CRC sheet, floor mounted |
| Transformer | In-house CRGO core, built to IS 9815 (Part 1), IS 5142 and IS 2026 |
| Design | Balanced or unbalanced |
| Duty | 100% load, continuous |
These are the Guaranteed Technical Particulars from SG Power's own datasheet. Other input ranges are built to customer specification, and the IS standards are published by the Bureau of Indian Standards. Sellers state the input range either per phase or phase to phase; phase-to-phase voltage is about 1.73 times the per-phase voltage, so convert both to the same basis before comparing quotes.
Key features of every SG Power 75 kVA unit are a KNEUTRON digital 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, and add an adjustable trip time delay. Calibration is done on a touch-pad.
The display shows: phase-to-neutral and phase-to-phase voltages, frequency and the current of each phase. You can set the output voltage and the input voltage band, and choose manual or automatic start and stop. True RMS sensing works without a separate control transformer.
| 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 |
| 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 that can run motors and lifts backwards |
| Single phasing protection | Loss of one phase, which can burn out three-phase motors |
A 75 kVA servo stabilizer is used where a three-phase running load of about 38 to 48 kW needs steady voltage. Typical users are factories, production lines, machine shops, hospitals, hotels, malls, cold storage plants and commercial buildings. One mainline unit protects every machine and appliance on the supply.
75 kva servo stabilizer for factory use: an industrial servo stabilizer for production lines, motors, compressors, injection moulding, printing and textile machines
75 kva servo stabilizer for CNC machines: four to six mid-size CNC lathes or VMCs on one supply; for drives with heavy harmonics, ask about a K-rated isolation transformer
Hotels, malls and institutions: ACs, HVAC equipment, lifts, kitchens and lighting across several floors
Cold storage and process plants: compressors and pumps that run round the clock
75 kVA servo stabilizer for lifts and commercial buildings: two or three lifts, pumps and common areas
SCADA-based and automated systems: controllers and drives that need good power quality and steady voltage
75 kva servo stabilizer for hospital: hospitals and diagnostic centres, usually with an unbalanced model; pair with an isolation transformer for sensitive medical equipment
The main advantages of a 75 kVA servo stabilizer are a precise, steady output, no distortion to the voltage waveform and the ability to carry full load continuously. Its limitations are carbon brush wear, slower correction than a static stabilizer, and no electrical isolation, so sudden spikes still need a surge protection device.
| Advantages | Limitations |
|---|---|
| ±1% output on SG Power models, smooth and stepless | Carbon brush and variac track wear, so yearly service is needed |
| Handles full load continuously, including motors and lifts | Corrects more gradually than a static (solid-state) stabilizer |
| Adds no waveform distortion | No galvanic isolation; add a surge device, or an isolation transformer for sensitive loads |
For most 75 kVA three-phase sites, a dimmer-type servo stabilizer with unbalanced, per-phase correction gives the best value. A linear servo type suits buyers who want a different variac design at a higher price. A static (IGBT) stabilizer gives the fastest voltage correction with no moving parts, but costs the most.
| Dimmer-Type Servo | Linear Servo | Static (IGBT) | |
|---|---|---|---|
| How it corrects | Motor turns a carbon brush on a toroidal variac (dimmer) | Contacts move along a straight variac winding | Solid-state switching, no moving parts |
| Output | Smooth, stepless, no added distortion | Smooth, stepless | Fast and tight; check its harmonic performance |
| Upkeep | Yearly brush and variac checks | Contact and track checks | Electronics; repairs need specialist parts |
| Price at 75 kVA | Moderate | Higher | Highest |
| Best for | Factories, hospitals, buildings with unbalanced loads | Buyers who prefer a linear design | Very fast-changing loads where budget allows |
SG Power's KNEUTRON 75 kVA models use the dimmer-type design with a buck-boost transformer, and SG Power also makes linear servo voltage stabilizers.
Running machines that can't afford voltage trips? Tell us what is on the supply and we will size the unit for it.
To choose between 75 kVA servo stabilizer manufacturers and suppliers, first check that the unit suits your load, phase balance and your site's lowest voltage. Then compare regulation, protections, oil-cooled build, in-house manufacturing, testing and local service. Ask each seller these ten questions:
Do you manufacture the stabilizer, or resell another company’s unit?
Is it balanced or unbalanced, and what is the enclosure’s protection against dust and moisture?
What input range does it cover per phase?
What output regulation, efficiency, correction speed (volts per second) and short-term overload capacity does it have?
Is the winding copper or aluminium, and are the transformers made in-house?
Does it include over/under voltage, overload, phase reversal, single phasing and time delay protection, and what happens to the healthy phases if one phase fails?
Was the unit tested before dispatch, and is there a test report and user manual?
Are GST, freight, installation, a manual or automatic bypass switch and the first oil fill included?
Who services it near my site, and are carbon brushes and control cards available locally?
What warranty and AMC (annual maintenance contract) are offered, in writing?
Before ordering, share your load list, supply type and voltage readings with the 75 kVA servo stabilizer manufacturer. With these details, the manufacturer can confirm whether 75 kVA is right and choose the design and input range. Accurate details also give you a firm quote that won't change after a site visit.
Load list: each machine’s rating, and which ones run together
Supply: whether a DG set also feeds the load, and its rating
Voltage readings: the lowest and highest voltage on each phase over a few days, including peak hours
Site conditions: indoor or outdoor, dust, heat, moisture and the floor space available
Output and wiring: the output voltage you need (380, 400 or 415V) and where the unit will be installed
A manufacturer designs, builds and tests the 75 kVA servo stabilizer, while a supplier or dealer resells units bought from a manufacturer. Buying from the manufacturer usually gives factory pricing, custom input ranges and direct technical support. A local supplier can help with fast stock delivery, as long as the manufacturer backs the service.
SG Power is both a manufacturer and a direct supplier: every unit is manufactured in its own factory and supplied directly. It also works with contractors, consultants and project buyers who need several units.
For 75 kVA servo stabilizer installation, have a qualified electrician fit the unit on the mainline after the meter or DG changeover. Use cables sized for about 104 A per phase and proper earthing. Follow the CEA safety and electric supply regulations. Maintenance is simple: keep it clean and book a yearly service or an annual maintenance contract (AMC).
Place the unit on a firm, level floor in a dry, ventilated room near the main LT panel. Never box or cover it, and ask for the exact weight and size
Check the oil level before first switch-on
Connect the stabilizer’s body earth terminal to the building’s earthing system
Servo units hum while correcting, so place the unit near the distribution board, away from wards, offices and guest rooms
If an online UPS serves critical loads, connect the stabilizer first and the UPS after it, so the UPS charges from steady voltage
Check the phase sequence at installation, and connect the neutral properly
Use the bypass switch only during servicing; machines are unprotected in bypass
Fit a surge protection device ahead of the stabilizer; a servo unit corrects slow voltage changes, not lightning spikes, and lightning is a common cause of stabilizer failure.
Check your earthing too. SG Power also makes earthing rods, chemical earthing electrodes, earth pit covers and lightning protection systems.
| Task | How Often | Who |
|---|---|---|
| Dust the body and vents | Monthly | User |
| Check input and output readings on each phase | Weekly | User |
| Check oil level and leaks | Every 3 months | Electrician |
| Inspect and replace worn carbon brushes | Yearly, or if correction slows | Trained technician |
| Test oil condition (breakdown voltage) and top up with transformer oil to IS 335 | Yearly | Trained technician |
| Full service and calibration | Yearly or under AMC | SG Power service |
Wrong sizing: running near full load overheats it, while a very light load can make the servo “hunt” back and forth
Supply beyond its range: frequent swings outside the input range keep the motor and brush moving all day
Heat and dust: a hot, dusty or badly ventilated room speeds up insulation ageing and brush wear
Skipped maintenance: worn brushes, low oil and loose terminals cause sparking and early failure
Need your 75 kVA unit installed or serviced? We'll recommend the right model and arrange delivery and service in your city.
Buyers choose SG Power as their 75 kVA servo stabilizer manufacturer because it has built servo stabilizers for 15+ years, winds its transformers in-house and tests every unit before dispatch. It offers balanced and unbalanced 75 kVA designs with custom input ranges. Customers in 319+ cities get factory pricing and local service.
| Why SG Power | Detail |
|---|---|
| Experience | 15+ years of manufacturing |
| Factory | 7,000 sq m in Ghaziabad, 84 machines, 250+ employees |
| Quality | 100% units tested, 173 checkpoints, NABL lab-tested design |
| Certifications | ISO 9001:2015, CE, RoHS, MSME registered |
| Customers | 5,937+ customers, service in 319+ cities |
| Related products | Isolation transformers (10–2000 kVA), K-rated transformers (K1, K13, K20) for harmonic loads, earthing and lightning protection |
Learn more about SG Power, or see the full servo voltage stabilizer range from 10 to 500 kVA.
Each SG Power 75 kVA unit is tested through a 3-level quality check covering 173 checkpoints before it leaves the factory, and the company is ISO 9001:2015 certified. The servo stabilizer design has also been tested at an NABL-accredited laboratory (Hydel Laboratories) for performance and safety.
Transformers and variacs are wound and tested in-house at SG Power's Ghaziabad factory, using grain-oriented silicon steel (CRGO) cores that keep iron and no-load losses low.
SG Power is trusted by government bodies, PSUs and leading private organisations across India for servo stabilizers, earthing and lightning protection products. Its customers range from power utilities and metro projects to defence establishments, cement plants and banks, as the list below shows:
| Sector | Organisations |
|---|---|
| Power and utilities | POWERGRID, NTPC, BHEL, NPCL, Coal India |
| Infrastructure and metro | L&T, Alstom, Indian Railways, Shapoorji Pallonji |
| Defence and government | DRDO, Indian Army, BSF, Airports Authority of India |
| Industry and corporate | Siemens, JSW, Hindalco, JK Cement, Apollo Tyres, ICICI Bank |
SG Power's customer ratings average 4.2 out of 5 from 132 buyer ratings on IndiaMART (checked October 2026). The rating covers all SG Power products bought through IndiaMART, including servo voltage stabilizers, earthing products and lightning arresters. The figure is taken directly from IndiaMART, where the individual reviews can be read.
| Source | Rating | Number of Ratings |
|---|---|---|
| IndiaMART | 4.2 out of 5 | 132 |
SG Power Products Pvt. Ltd. is a 75 kVA servo stabilizer manufacturer and supplier based in Sector 62, Noida, with its own factory in Ghaziabad. It delivers and services 75 kVA units across Delhi NCR, Uttar Pradesh and India. Buyers looking for a 75 kVA servo stabilizer in Noida, Delhi or Gurugram get local sizing and service.
SG Power is one of the 75 kVA servo stabilizer suppliers in India, supplying customers in 319+ cities. These cities include Noida, Delhi, Gurugram, Ghaziabad, Faridabad, Kanpur, Hyderabad, Chennai, Pune, Rajkot, Coimbatore and Bengaluru.
Want a 75 kVA unit delivered to your site? Ask for a quote, and we'll confirm the model, price and delivery.
A 75 kVA servo stabilizer carries about 60 kW at full rating; keep the running load to about 48 kW.
It draws about 104 A per phase at 415V; a 45 kW load needs about 70.3 kVA, so 75 kVA fits.
A 75 kVA three-phase oil-cooled servo stabilizer typically starts from about ₹1,25,000 + GST with a standard input range.
SG Power’s 75 kVA three phase servo stabilizer is oil cooled, 170–280V per phase as standard, balanced or unbalanced, at 410V ±1% phase to phase and 97% efficiency.
SG Power Products Pvt. Ltd. is a 75 kVA servo stabilizer manufacturer in Noida (Sector 62) and a supplier across 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.
Contact SG Power for a free load check and the latest 75 kVA servo stabilizer price. Whether you need a balanced or unbalanced, standard or wide-range 75 kVA unit for a factory, hospital or building, we'll match the model and input range to your site.