SG Power Products Pvt. Ltd. is one of the Noida-based 150 kVA servo stabilizer manufacturers, building oil-cooled three-phase models in its own Ghaziabad factory. A 150 kVA servo stabilizer holds the voltage steady for a running load of up to about 96 kW. It suits factories, plastics and printing units, hospitals, hotels, malls and commercial complexes.
As direct 150 kVA servo stabilizer suppliers, we sell to end users, contractors, consultants and project buyers across India with no trader's margin.
| Capacity | 150 kVA (150,000 VA, about 120 kW at a 0.8 power factor) |
| Recommended running load | Up to about 96 kW, allowing a 25% safety margin |
| Phase | Three phase, four wire (415V supply) |
| Cooling | Oil cooled |
| Input range | 170–280V per phase (340–480V phase to 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 209 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 |
| Price | On request, after a free load and site-voltage check |
| Testing | 100% units tested, 173 checkpoints, NABL lab-tested design |
Buy your 150 kVA unit direct from the manufacturer, SG Power, which designs, winds and tests every unit for factories, hospitals and large 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 150 kVA servo stabilizer is an oil-cooled, three-phase voltage stabilizer rated for 150,000 VA, or about 120 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 (swells) or falls (sags). One unit protects a whole plant or building.
It is also called a 150 kVA servo voltage stabilizer, a 150 kVA 3 phase servo stabilizer or a 150 kVA automatic voltage regulator (AVR). Buyers also search for a 150 kVA voltage stabilizer or a 150 kVA automatic voltage stabilizer. Other names are a 3 phase voltage stabilizer of 150 kVA, a 150 kVA servo controlled voltage stabilizer and a 150 kVA servo voltage corrector. Some sellers call it a 150 kVA voltage regulator or voltage controller, and industrial buyers often ask for a 150 kVA heavy duty voltage stabilizer. It is also spelt 150 kVA servo stabiliser or typed as 150kva.
A 150 kVA rating means 150,000 volt-amperes, not 150 watts. The variac is a variable autotransformer, often called a dimmer, turned by a servo motor. A three-phase unit has one set of variac, buck-boost transformer and servo motor for each phase, as how a servo stabilizer works explains. 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 150 kVA servo stabilizer price in India depends mainly on the input voltage range, balanced or unbalanced design and build. SG Power quotes each 150 kVA unit on request after a free load and site-voltage check, so the price matches your site. Complete oil-cooled 150 kVA units listed online mostly cost about ₹1,55,000 to ₹3,00,000 before GST.
| 150 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 | Price on request |
| 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 are indicative. For the latest price, contact SG Power.
Online, 150 kVA stabilizer prices vary from about ₹1,50,000 to over ₹5,00,000, 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. Some listings even show a different capacity in their specifications.
Marketplace listings also carry placeholder prices, such as ₹50 or ₹11,000, which are listing errors rather than real offers.
| Price Band (Online Listings) | What You Usually Get |
|---|---|
| Under ₹1,50,000 | Usually a smaller capacity, a single-phase or air-cooled listing, or a part price; check that the listed capacity really is 150 kVA three phase |
| ₹1,50,000 – ₹2,30,000 | Standard three-phase oil-cooled models, often with narrow input ranges or prices shown before GST and freight |
| ₹2,30,000 – ₹3,50,000 | Wider input ranges, unbalanced designs or heavy-duty builds |
| Over ₹3,50,000 | Very wide input 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.
Many listings quote the input range phase to phase, such as 295–465V, 340–480V or 360–480V. SG Power quotes 170–280V per phase; the specifications give the phase-to-phase band. Compare the input range, design and total delivered cost, not just the headline 150 kVA 3 phase servo stabilizer price.
To check a 150 kVA listing, match its phase, power, current, input range and output against the figures for a true 150 kVA three-phase unit. Some online listings mix these up, for example by showing kVA as kW. A mismatch usually means a copy-paste error or a different capacity.
| Check | True 150 kVA Three-Phase Unit | Red Flag in a Listing |
|---|---|---|
| Capacity in the specifications | 150 kVA throughout the listing | Title says 150 kVA, but the specification table shows 100 kVA or 50 kVA |
| Phase | Three phase, four wire | “Single phase” 150 kVA, which would draw over 600 A |
| Power | About 120 kW at 0.8 power factor | 150 kW, with kVA shown as kW |
| Current | About 209 A per phase at 415V, or about 217 A at 400V | Not stated, or a lower figure such as 150 A per phase |
| Input range | Per phase (e.g. 170–280V) or phase to phase (e.g. 340–480V) | One figure only, such as “240V” or “400V” |
| Output | 410V ±1% (P-P), settable to 380, 400 or 415V | No regulation figure such as ±1% |
| Oil | Oil cooled, with the oil quantity stated | Oil quantity missing, or a price that excludes oil without saying so |
| Overload and ambient rating | Short-term overload capacity and highest operating temperature stated | Neither figure given |
| Price basis | GST, freight, oil and installation stated | A bare price with no terms |
Have a quote already? Send it to us with your load list, and we'll check it against your site at no cost.
Send Us Your QuoteThree things mainly affect the 150 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 and more oil; on published price lists, the widest-range 150 kVA models cost more than twice the narrowest-range ones
Winding and core: good windings and CRGO cores run cooler and last longer
Cabinet: a CRCA (cold rolled close annealed) steel body with a pre-treated, powder-coated finish resists rust in damp or dusty plants
Oil and accessories: some published price lists exclude the transformer oil and charge extra for high/low cut-off or an input MCCB (moulded case circuit breaker)
Extras: data logging, remote monitoring, password-protected settings, built-in surge protection and an automatic bypass add to the price
A 150 kVA unit for low-voltage sites can be built with a custom, 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. Is the voltage low all day rather than rising and falling? Then ask your electricity distribution company (DISCOM) to check the transformer tap setting first, or your electrician if you have an HT supply.
A 150 kVA servo stabilizer can run a load of about 120 kW at full rating. For safe everyday use, keep the running load to about 96 kW, which leaves a 25% margin for the surge when motors, compressors and lifts start. Spread the load evenly across the three phases.
For 150 kVA to kW, multiply by the 0.8 power factor to get about 120 kW.
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 126 to 150 kVA means a 150 kVA unit; above it, choose 200 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 209 A on the most loaded phase means 150 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.
Leave out loads that do not need it: heaters, ovens and other resistive loads work on almost any voltage. Many sites keep them on a separate feeder and stabilize only motors, machines and electronics. This can cut the stabilizer size and cost.
For a whole building: check the sanctioned load or contract demand 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 150 kVA Right? |
|---|---|---|
| Machine shop: twelve to fifteen mid-size CNC machines and compressors | about 85–95 kW | Yes |
| Plastics unit: four or five injection moulding machines with a chiller | about 88–95 kW | Yes |
| Hospital: equipment, ACs, lifts, lighting | about 90 kW | Yes |
| Hotel or mall: ACs, lifts, kitchen and lighting across several floors | about 92 kW | Yes |
| Commercial complex: six to eight lifts, pumps, common areas and office ACs | about 88 kW | Yes |
Not sure about your load? Send us your machine or appliance list and we will confirm whether 150 kVA is the right capacity for your site.
Get Free Sizing AdviceChoose between 125 kVA, 150 kVA and 200 kVA by running load. Use 125 kVA for up to about 80 kW, 150 kVA for up to about 96 kW and 200 kVA for up to about 128 kW. A 90 kW load needs about 140.6 kVA, so 150 kVA is the right size and avoids overload trips.
| 125 kVA | 150 kVA | 200 kVA | |
|---|---|---|---|
| Full rating (0.8 power factor) | about 100 kW | about 120 kW | about 160 kW |
| Safe running load (25% margin) | about 80 kW | about 96 kW | about 128 kW |
| Current per phase at 415V | about 174 A | about 209 A | about 278 A |
| SG Power cooling | Oil cooled | Oil cooled | Oil cooled |
| Approximate price (+ GST) | Price on request | Price on request | Price on request |
Prices are indicative. For the latest price, contact SG Power.
Compare the 125 kVA servo stabilizer, the 100 kVA servo stabilizer, the full oil cooled range and the servo stabilizer price list. Most sites with a load this large take an HT (11 kV) supply with their own transformer. There, the stabilizer sits on the LT side after the transformer, or an HT AVR transformer can regulate voltage at the source instead.
Not sure whether 150 kVA is enough? Share your machine or appliance list, and we'll recommend the right size.
A 150 kVA servo stabilizer is oil cooled because its transformers carry about 209 A per phase. Oil removes that heat far better than air, a method called ONAN (oil natural, air natural). SG Power's air-cooled range stops at 50 kVA, so every 150 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 (see size and weight below) |
| Better tolerance of hot, dusty and humid sites | Regular oil checks (see the maintenance table below) |
| 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, cable entry and servicing |
Transformer oil: top up only with transformer oil to IS 335, and have the oil's breakdown voltage tested once a year, as per IS 1866.
In size and weight, a 150 kVA oil-cooled servo stabilizer is a heavy, floor-standing cabinet with an oil tank, larger than a 125 kVA unit. Weight depends mostly on the oil quantity and input range. Ask for exact dimensions and weight, with oil, before planning the room.
Published price lists show about 450 to 800 litres of transformer oil for 150 kVA, depending on the input range. Allow clear space around the unit for airflow, cable entry and servicing, and check that doors and ramps let it pass. Ask whether it sits on castor wheels or a skid base.
Searching “150 kVA stabilizer size” for capacity instead? See how much load a 150 kVA unit can run.
A balanced 150 kVA stabilizer corrects all three phases together, while an unbalanced one corrects each phase on its own. Balanced suits three-phase motors and production lines that load each phase equally. Unbalanced 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, injection moulding, compressors | Hospitals, hotels, malls, commercial complexes |
SG Power makes both balanced and unbalanced 150 kVA designs. One cabinet with three per-phase sections usually costs less and takes less space than three separate single-phase units. Large oil-cooled models carry a separate meter for each phase, so the operator can watch all three phases at a glance.
The 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 | 150 kVA, three phase, four wire |
| Input voltage range | 170–280V per phase (340–480V phase to 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.
Where 150 kVA sits in SG Power's range: the catalogue model chart lists oil-cooledthree-phase models at 75, 100, 125, 150, 200, 250, 400 and 500 kVA. All of them take a standard 170–280V per phase input.
Key features and protections of every SG Power 150 kVA unit start with a KNEUTRON digital controller, a front-panel display and ±1% voltage regulation. The 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. The front panel also has Start, Stop and Menu keys.
| 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; the display shows “Ph. Reversal”, and it resets once two incoming phases are interchanged and Start is pressed |
| Single phasing protection | Loss of one phase, which can burn out three-phase motors |
A 150 kVA servo stabilizer is used where a three-phase running load of about 81 to 96 kW needs constant voltage despite mains voltage fluctuations. Typical users are factories, plastics and printing units, machine shops, hospitals, hotels, malls, cold storage plants and commercial complexes.
One mainline unit, stabilizing the whole supply, protects every machine and appliance on it.
150 kVA servo stabilizer for factory use: a 150 kVA industrial servo stabilizer for production lines, textile looms, pharma, food processing and packaging machines, chillers and boilers
150 kVA servo stabilizer for CNC machines: twelve to fifteen mid-size CNC lathes or VMCs on one supply; for drives with heavy harmonics, ask about a K-rated isolation transformer
150 kVA servo stabilizer for printing and injection moulding machines: offset presses, moulding machines and their chillers, which stop or produce rejects when voltage dips
For hotels, malls and institutions: ACs, VRV/VRF systems, HVAC equipment, lifts, kitchens and lighting across several floors
For cold storage, water bottling and process plants: compressors, pumps and filling lines that run round the clock
For apartments and residential societies: lifts, water pumps, common-area lighting and clubhouse ACs on one common supply
Automobile, telecom and research sites: assembly and test lines, telecom equipment rooms and scientific laboratories
For lifts and commercial complexes: six or more lifts, pumps and common areas
Solar plants: auxiliary loads, pumps and controls at sites where grid voltage swings
IT offices and SCADA-based systems: servers, controllers and drives that need good power quality, with the UPS after the stabilizer
150 kVA servo stabilizer for hospital: multi-speciality hospitals and diagnostic centres, usually with an unbalanced model; pair with an isolation transformer for sensitive medical equipment
The main advantages of servo correction at 150 kVA 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 |
Why steady voltage matters at 150 kVA: when voltage dips, motors draw more current to deliver the same power and run hot. PLCs can reset mid-cycle, and relays can chatter. High voltage stresses insulation, drives and electronics. A stabilizer of this size holds the whole supply steady, so every machine sees the voltage it was designed for.
For most 150 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 150 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 150 kVA models use the dimmer-type design with a buck-boost transformer, and SG Power also makes linear servo voltage stabilizers. Some makers also offer rolling-contact designs, which use a roller instead of a carbon brush on the variac.
Some engineers ask whether a spare VFD (variable frequency drive) can act as a stabilizer. A VFD can feed one motor-driven machine, but it is not built to regulate a whole plant's mixed loads. A servo stabilizer is the simpler fix for site-wide swings such as 320–420V.
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 150 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), short-term overload capacity and rated operating temperature does it have, and is the display easy to read?
Is the winding copper or aluminium, and are the transformers made in-house?
Does it include over- and under-voltage, overload, phase reversal, single phasing, neutral failure and time delay protection, and what happens to the healthy phases if one phase fails?
Was the unit tested before dispatch, is there a test report and user manual, and can you share sites where your units have run for years?
Are GST, freight, installation, a manual or automatic bypass switch, an input MCCB 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?
A good tender specification for a 150 kVA unit lists the rating, input range, output accuracy, cooling, protections, bypass and site conditions in one sheet. Consultants and purchase teams then compare every quote on the same basis. Ask each bidder to confirm each line in writing, with test documents.
| Item | What to Specify |
|---|---|
| Rating and duty | 150 kVA, three phase, four wire, continuous 24×7 duty at 100% load |
| Input and output | Input range per phase or phase to phase from your readings; 410V ±1% phase-to-phase output, settable to 380, 400 or 415V, with the efficiency stated and tested |
| Cooling and construction | Oil cooled (ONAN), buck-boost transformer, transformer oil to IS 335, oil level and oil temperature indicators, insulation class |
| Overload | Short-term overload rating, for example 120% for one minute |
| Protections | Over- and under-voltage, overload, phase failure, phase reversal, neutral failure, and surge protection ahead of the unit |
| Display and logging | Input and output voltage and current on each phase and frequency; optional event log (hours on mains and DG, number of high and low cut-offs) and password-protected settings |
| Bypass | Manual bypass, or automatic bypass where the load cannot stop |
| Site conditions | Indoor or outdoor, highest ambient temperature, humidity, dust and enclosure protection (IP rating) |
| Generator use | Works on DG power and handles motor, lift, HVAC and VFD loads |
| Standards and documents | IS 9815, data sheet, general arrangement (GA) drawing, single line diagram, routine test certificate and factory acceptance test report |
Writing a tender? Send us the draft clause and we will confirm, line by line, what SG Power can supply against it.
Before ordering, share your load list, supply type and voltage readings with the manufacturer. With these details, the manufacturer can confirm whether 150 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: LT or HT connection, and whether a DG set also feeds the load, with its rating
Voltage readings: the lowest and highest voltage on each phase
Site conditions: the points in the tender table above, plus the floor space available and how the unit will be moved in
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 150 kVA 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.
To install a 150 kVA unit, have a qualified electrician fit it on the mainline after the meter or DG changeover. Size the input cables for about 294 A per phase at low mains and fit proper earthing. Follow the CEA safety and electric supply regulations. Keep it clean and book a yearly service or AMC.
Place the unit on a firm, level floor in a dry, ventilated room near the main LT panel. Never box or cover it
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 or inverter serves critical loads, connect the stabilizer first and the UPS or inverter after it, so it charges from steady voltage. Do not put the stabilizer on the inverter output
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, as per IS 1866) 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 150 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 150 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 150 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 and certifications | Every unit tested before dispatch; ISO 9001:2015, CE, RoHS, MSME registered |
| Customers | 5,937+ customers, service in 319+ cities |
| Exports | Kenya and Saudi Arabia |
| 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 150 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.
Every 150 kVA unit is manufactured in Ghaziabad, with transformers and variacs wound and tested in-house. Grain-oriented silicon steel (CRGO) cores keep iron and no-load losses low.
SG Power, the maker of KNEUTRON 150 kVA stabilizers, is trusted by government bodies, PSUs and leading private organisations across India for its stabilizer, 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 |
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'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 150 kVA servo stabilizer manufacturer and supplier based in Sector 62, Noida. It delivers and services 150 kVA units across Delhi NCR, Uttar Pradesh and India. Buyers in Noida, Delhi or Gurugram get local sizing and service from a servo voltage stabilizer manufacturer in Noida.
Looking for the 150 kVA servo stabilizer price in Noida? Ask for a quote that shows GST, freight and installation, so you can compare the full delivered cost. If you searched for 150 kVA servo stabilizer suppliers near me, our Sector 62 office and Ghaziabad factory serve Noida, Delhi, Gurugram, Ghaziabad and Faridabad.
SG Power is one of the 150 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 150 kVA unit delivered to your site? Ask for a quote, and we'll confirm the model, price and delivery.
Capacity: a 150 kVA servo stabilizer gives about 120 kW at full rating; keep the running load to about 96 kW.
Current and sizing: about 209 A per phase at 415V; a 90 kW load needs about 140.6 kVA.
Price: on request from SG Power; complete oil-cooled 150 kVA units listed online mostly cost about ₹1,55,000 to ₹3,00,000 before GST.
Build: SG Power’s 150 kVA three phase servo stabilizer is oil cooled, 170–280V per phase, balanced or unbalanced, at 410V ±1% phase to phase and 97% efficiency.
Oil and size step: about 450–800 litres of transformer oil on published price lists; above 96 kW of running load, choose 200 kVA.
Uses and life: factories, plastics and printing units, hospitals, hotels, malls and commercial complexes; 10–15 years or more with a yearly service.
Maker: SG Power Products Pvt. Ltd., a 150 kVA servo stabilizer manufacturer in Noida (Sector 62) supplying 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 150 kVA servo stabilizer price. Whether you need a balanced or unbalanced, standard or wide-range 150 kVA unit for a factory, hospital or building, we'll match the model and input range to your site.