Single Phase Oil Cooled Servo Voltage Stabilizer Manufacturer in India

Purevolt India manufactures single phase oil cooled servo voltage stabilizers from 10 KVA to 500 KVA. Oil immersed design handles high KVA single phase loads in high ambient temperature and outdoor environments. Output stability within ±1%, 98% efficiency. ISO 9001 certified, NABL tested, SONCAP approved.

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Single Phase Oil Cooled Servo Voltage Stabilizer - Purevolt India

30+Years Manufacturing

60+Countries Exported

10–500 KVASingle Phase Range

ISO 9001NABL · SONCAP

±1%Output Stability

Purevolt India manufactures single phase oil cooled servo voltage stabilizers from 10 KVA to 500 KVA. These handle high KVA single phase loads in high ambient temperature or outdoor environments where air cooling is insufficient. Output stability within ±1%, 98% efficiency. ISO 9001 certified, NABL tested, SONCAP approved for export to Africa and the Middle East.

What It Is

Single Phase Oil Cooled Servo Voltage Stabilizer

Single phase air cooled stabilizers work well for loads up to 90 KVA in moderate indoor environments. But if your single phase load is heavier than that, your installation is outdoors, or your site runs at high ambient temperature, you need oil cooling. A single phase oil cooled servo voltage stabilizer gives you the same stepless voltage correction as air cooled, but the internal components sit in mineral transformer oil that handles heat far more effectively at sustained high loads.

Purevolt manufactures single phase oil cooled servo stabilizers from 10 KVA to 500 KVA at our Okhla, Delhi facility. Built using high grade copper windings and premium quality components. Available in balanced and unbalanced configurations with indoor and outdoor weatherproof enclosures.

Why Install

Why Some Single Phase Applications Require Oil Cooling

Air cooling is not always sufficient for single phase applications. Four situations make oil cooling the right choice.

High KVA Single Phase Loads Exceed Air Cooling Limits

Single phase loads above 90 KVA generate more heat than exhaust fans can reliably remove. Oil immersion solves this. The oil absorbs heat uniformly from all components and transfers it to the tank wall for passive dissipation. The cooling never stops, never clogs, and does not depend on ambient air temperature.

Medical and Precision Equipment Needs Consistent Voltage

High KVA single phase loads like MRI pre-conditioning units, X-ray systems, and precision lab instruments need voltage that stays exactly right throughout the working day. A thermally stable oil cooled stabilizer delivers more consistent output than an air cooled unit that is running near its thermal limit for hours at a time.

Outdoor Single Phase Installations Need Sealed Units

Fuel stations, telecom remote sites, and rural single phase installations cannot use open air cooled units outdoors. An oil cooled stabilizer in a sealed weatherproof enclosure is the correct solution. The sealed tank keeps components protected from dust, rain, insects, and corrosive atmospheres that would destroy an open unit.

Stable Output Extends Connected Equipment Life

Equipment running at the right voltage, supplied by a stabilizer that is not thermally stressed, has longer intervals between failures and lower maintenance costs. Oil cooled stabilizers running well within their thermal limits deliver better output consistency over their entire service life than air cooled units pushed to their limits.

How It Works

How a Single Phase Oil Cooled Servo Stabilizer Works

The servo motor and dimmerstat correct voltage in exactly the same way as in air cooled units. The entire difference is in how heat leaves the system.

Control Card Monitors Single Phase Input

The electronic control circuit continuously samples the incoming single phase voltage and compares it to the 230V reference. This monitoring runs in real time and does not stop at any load level or input condition.

Servo Motor Adjusts the Dimmerstat

When the input deviates, the control circuit drives the AC synchronous servo motor which moves the dimmerstat arm. This changes the output voltage smoothly and continuously, not in the stepped jumps of a relay stabilizer. The correction is proportional to the error.

Oil Keeps All Components Cool

The dimmerstat, servo motor, and control transformer all sit inside a sealed oil tank. Heat moves from the components into the mineral oil, then from the oil to the tank walls, which radiate it to the surrounding air. No fans. No moving parts in the cooling system. Silent operation throughout the working day.

Stable 230V AC Reaches the Load

The corrected output passes through the buck-boost transformer stage and reaches the connected equipment as stable 230V AC within plus or minus 1 percent. The oil tank maintains safe operating temperatures throughout sustained single phase operation at any load level up to rated capacity.

Technical Specifications

Single Phase Oil Cooled Servo Stabilizer Specifications

Specification	Details
Capacity Range	10 KVA to 500 KVA
Phase	Single Phase
Input Voltage Range	130V to 270V AC (custom ranges available)
Output Voltage	230V AC ±1%
Frequency	50 Hz
Correction Speed	25 to 30V per second
Cooling Type	Oil Cooled (mineral transformer oil, natural convection)
Efficiency	98% and above
Construction	Balanced / Unbalanced
Enclosure	Indoor / Outdoor weatherproof available
Certifications	ISO 9001:2008, NABL, SONCAP (Bureau Veritas / SGS / Intertek)
Warranty	1 year standard; extended warranty available
Customisation	Input/output voltage, KVA, enclosure all customisable on request

Salient Features

Features of Purevolt Single Phase Oil Cooled Stabilizers

Oil immersed design for sustained thermal management from 10 KVA to 500 KVA
Output voltage stability within ±1% across the full operating input range
Efficiency of 98% and above at all load conditions
Silent operation. No fans, no filters, no moving parts in the cooling system.
Available in indoor and outdoor weatherproof enclosures
Stepless correction using AC synchronous servo motor and dimmerstat
Handles input from 130V to 270V AC without interrupting the output
Over and under voltage auto cut-off protection built in
High grade copper windings for low losses and long operating life
Available in balanced and unbalanced construction
SONCAP certified for West African export markets
ISO 9001 certified manufacturing with NABL tested products

Industries Served

Where Single Phase Oil Cooled Stabilizers Are Used

High KVA single phase loads, outdoor installations, continuous duty applications, and environments where air cooling is not sufficient.

Medical Equipment

Laboratories

CNC Controllers

Telecom Remote Sites

Fuel Stations

Rural Installations

Printing Machines

Pharma Equipment

Food Processing

Export Markets

Server Rooms

Schools & Colleges

Diagnostic Centres

Research Institutes

Packaging Units

Global Reach

Countries We Export Single Phase Oil Cooled Stabilizers To

Purevolt has exported single phase oil cooled servo stabilizers to over 30 countries since 1995. ISO 9001 certified, NABL tested, SONCAP approved for African markets.

FAQ

Frequently Asked Questions

What is a single phase oil cooled servo voltage stabilizer?

A single phase oil cooled servo voltage stabilizer is a servo type automatic voltage controller designed for single phase loads where the internal components are immersed in mineral transformer oil for cooling. It handles higher KVA ratings than air cooled single phase units and performs better in high ambient temperature and outdoor environments. Purevolt manufactures these from 10 KVA to 500 KVA.

When should I choose oil cooled over air cooled for single phase?

Choose oil cooled single phase when your single phase load exceeds 90 KVA, when the installation site has ambient temperature above 45 degrees, when the unit will run continuously 24 hours a day, or when the installation is outdoors. For loads below 90 KVA in moderate indoor environments, air cooled single phase units are the right choice.

What input voltage range does the single phase oil cooled stabilizer handle?

Purevolt single phase oil cooled servo stabilizers handle input voltage from 130V to 270V AC and deliver a stable 230V AC output within plus or minus 1 percent. Custom input ranges are available for sites where supply falls outside this window. Share your site voltage measurements and our engineers will confirm the right design.

What is the efficiency of single phase oil cooled stabilizers?

Purevolt single phase oil cooled servo stabilizers maintain efficiency of 98 percent and above at all load conditions. This matches air cooled units in efficiency, with the added advantage of better thermal management at higher KVA ratings and in high ambient temperature environments.

Can these be installed outdoors?

Yes. Purevolt single phase oil cooled servo stabilizers are available in weatherproof outdoor enclosures. These are used at fuel stations, telecom remote sites, rural single phase installations, and outdoor applications in African countries where sealed outdoor units are required.

What are the most common applications for single phase oil cooled stabilizers?

Common applications include medical diagnostic equipment, high KVA laboratory instruments, precision CNC machine controllers, fuel station equipment, telecom remote sites, outdoor single phase industrial installations, and any application in a high ambient temperature region where air cooling is insufficient for the load size.