Isolation Transformer Manufacturers in India
Purevolt is a leading isolation transformer manufacturer in India, building single-phase and three-phase units from 1 KVA to 1000 KVA. Our isolation transformers are UL-approved, ISO 9001-certified, and NABL tested.
Types of Isolation Transformers We Manufacture
Purevolt builds isolation transformers in four main types, all available from 1 KVA to 1000 KVA in single phase and three phase versions. Every unit is manufactured to your input voltage, output voltage, and site requirements. Air cooled for moderate indoor environments, oil cooled for heavy loads and high ambient temperatures.
Single Phase Isolation Transformer
For offices, labs, medical equipment, computers, and light industrial loads. Provides complete galvanic isolation and eliminates line noise, spikes, and transients on single phase supply.
1 KVA โ 1000 KVA 230V AC Air / Oil Cooled View Single Phase Range โ
Three Phase Isolation Transformer
For industrial machinery, CNC machines, PLCs, data centres, and pharmaceutical plants. Available in open type or IP21 to IP56 enclosed versions for indoor and outdoor use.
1 KVA โ 1000 KVA 415V AC Delta/Star ยท Star/Star View Three Phase Range โ
Step Up Isolation Transformer
Boosts voltage from a lower input to a higher output while providing full electrical isolation. Used with imported machinery from USA, Japan, and Europe that runs on voltages higher than local supply.
1 KVA โ 1000 KVA Custom Voltage Ratios UL Approved View Step Up Range โ
Step Down Isolation Transformer
Reduces voltage from a higher input to a lower output with full galvanic isolation. Most common for running imported Western machinery on Indian supply and for factory sub-distribution points.
1 KVA โ 1000 KVA Faraday Shielded Option IP56 Available View Step Down Range โWhy Your Facility Needs an Isolation Transformer
Indian power lines carry more than just voltage. Spikes, harmonics, RFI noise, transients, and ground loops travel straight into your equipment through the mains. An isolation transformer stops all of it at the input.
Line Noise Destroys Sensitive Equipment
SMPS loads, electronic ballasts, and PWM switching systems push dangerous spikes and RFI noise back onto the mains. This stress builds up on semiconductor components and shortens equipment life significantly.
Ground Loops Corrupt Data and PLCs
When two pieces of equipment share a ground path, differences in ground potential create loop currents. These cause data corruption in servers, software crashes in PLCs, and unexplained failures in CNC machines.
Electric Shock Risk Without Isolation
Without galvanic isolation, a fault in connected equipment can create a shock hazard for operators. In medical environments this is a patient safety issue. Isolation transformers provide a complete electrical barrier between supply and load.
Equipment Failures Are Expensive
PLC damage, storage media failures, CNC controller faults, and medical instrument downtime all cost far more than the isolation transformer that would have prevented them. Repeated transient stress is the cause most engineers miss.
How an Isolation Transformer Works
An isolation transformer transfers electrical power from the supply to the load using only magnetic coupling. There is no direct electrical connection between the input and the output at any point. This is what makes it fundamentally different from a standard transformer.
AC Power Enters the Primary Winding
The incoming AC supply energises the primary winding. Spikes, surges, and noise are present on this side. They do not pass through to the secondary.
Magnetic Field Transfers Energy
The primary winding creates a changing magnetic field in the CRGO silicon steel core. This field induces a voltage in the secondary winding without any electrical connection between the two sides.
Galvanic Isolation Blocks Noise
Because there is no conductive path, spikes, transients, RFI noise, and ground loops cannot cross from the primary to the secondary. Faraday shields in ultra isolation versions block even capacitive coupling.
Clean Power Delivered to Equipment
The secondary winding delivers clean, isolated power to your connected equipment. No shock path. No ground loops. No line noise. Just stable, safe power at the voltage you need.
Isolation Transformer Specifications & Capacity Range
| Specification | Single Phase | Three Phase |
|---|---|---|
| Capacity Range | 1 KVA โ 1000 KVA | 1 KVA โ 1000 KVA |
| Input Voltage | As per requirement | As per requirement |
| Output Voltage | As per requirement | As per requirement |
| Frequency | 50 Hz / 60 Hz | 50 Hz / 60 Hz |
| Cooling Type | Air Cooled / Oil Cooled | Air Cooled / Oil Cooled |
| Insulation Class | Class F (155ยฐC) | Class F (155ยฐC) |
| Winding Material | High Grade Copper | High Grade Copper |
| Core Material | CRGO Silicon Steel | CRGO Silicon Steel |
| Enclosure | Open / IP21 / IP42 / IP56 | Open / IP21 / IP42 / IP56 |
| Certifications | UL Approved, ISO 9001, NABL Tested, SONCAP Certified (Bureau Veritas / SGS / Intertek) | |
| Warranty | Minimum 2 years standard | |
| Customisation | Any input/output voltage, KVA rating, enclosure type, winding configuration available | |
Which Type of Isolation Transformer Do You Need?
Both types provide complete galvanic isolation and full noise suppression. The difference is in the cooling method, maximum KVA capacity, and the environment they are built for.
- Offices, labs, hospitals, server rooms
- Moderate ambient temperature (below 45ยฐC)
- Indoor, clean environments
- CNC machines, PLCs, computers
- Light to medium industrial loads
- Medical and diagnostic equipment
- Lower upfront cost
- Heavy industrial plants and factories
- High ambient temperature (Africa, Middle East)
- Outdoor and export installations
- Telecom towers and remote sites
- 24/7 continuous industrial operation
- Pharma, food processing, oil and gas
- Longer service life in harsh conditions
Why Choose Purevolt India?
At Purevolt India, we focus on delivering real value, not just products. Here is what makes our transformers a dependable choice for your business.
Factory-Direct Quality at the Right Price
You get strong build quality and reliable performance without paying extra margins. We manufacture directly, so you receive better pricing without compromising standards.
Flexible Voltage Solutions
Our transformers work as both step-up and step-down units, with voltage options below 1000V. This gives you the flexibility to use them across different applications without ordering separate equipment.
Built for Indoor and Outdoor Use
Designed with durable NEMA 3R enclosures, our transformers handle tough environments whether installed inside your facility or outdoors. IP56 rated units are standard for outdoor and export orders.
Multiple Phase Conversion Options
Convert single-phase to single-phase, three-phase to three-phase, or even three-phase to single-phase depending on your operational needs. Custom winding configurations available on request.
Long Life with Assured Warranty
Every transformer comes with a minimum 2-year warranty. Built for durability and efficiency, our products are made to perform consistently for years with minimal maintenance.
Handles High Voltage Spikes with Confidence
Engineered with advanced electrical design, our transformers can withstand high voltage fluctuations while maintaining stable output power throughout the load cycle.
If you are looking for a transformer that delivers safety, reliability, and long-term peace of mind, Purevolt India is ready to support your requirements.
Request a QuoteApplications of Isolation Transformers
Wherever sensitive equipment needs protection from line noise, ground loops, and shock hazards, a Purevolt isolation transformer is the right solution.
See Our Manufacturing Facility
Watch how Purevolt designs, winds, assembles, and tests isolation transformers at our Okhla, Delhi factory
Countries We Regularly Export Isolation Transformers To
Purevolt exports isolation transformers to 30+ countries. Our UL approval, ISO 9001, NABL, and SONCAP certifications tested by Bureau Veritas, SGS, and Intertek are accepted in all major import markets worldwide.
Frequently Asked Questions
Clients
Trusted by MNCs, government organisations, hospitals, and industrial leaders across India and 30+ countries worldwide.
User Reviews of Purevolt Isolation Transformers
Real feedback from customers across Africa, the Middle East, and Asia who trust Purevolt for their power protection requirements.
Joy
Nigeria โ 3 Phase Isolation Transformer
Iqbal
Saudi Arabia โ Step Down Isolation Transformer
Rohit
Gurgaon, India โ Single Phase Isolation Transformer
Overseas Installations & Trade Shows
From single phase units in Indian hospitals to large three phase isolation transformers in Nigerian factories and oil cooled units in Saudi Arabia, Purevolt isolation transformers run in demanding environments worldwide.
Request a Quote or Technical Consultation
Tell us your KVA requirement, input voltage, output voltage, phase, and installation location. Our engineers will recommend the right isolation transformer and send you a detailed quote within 24 hours.