Step Up Transformer Manufacturers in India
Purevolt India manufactures step up transformers from 1 KVA to 1000 KVA in single phase and three phase designs. ISO 9001 certified, NABL tested, exporting since 1995 to over 30 countries including the USA, Nigeria, UAE, and Australia.
When Does Your Plant or Site Need a Step Up Transformer?
Your machine from the US needs 480V. Your supply gives 240V. That is the most common situation we deal with. Here is why step up transformers are essential for specific operations.
Imported Machinery Needs Higher Voltage
A machine from America needs 480V three phase. A Japanese CNC centre needs 200V. A German press needs 380V. Your Indian supply is 415V or 240V. A step up transformer converts accurately and keeps the machine at its rated voltage.
Power Generation and Transmission
At the generation stage, step up transformers increase voltage for long distance transmission. Higher voltage means lower current, which means less heat loss across long cable runs. Generation plants use step up transformers before connecting to the high voltage grid.
Renewable Energy Grid Connection
Solar arrays and wind turbines generate at relatively low voltage. Step up transformers bring this up to grid interconnection voltage before the power is fed into the network. A required component in any grid-connected solar or wind installation.
UPS and Power Conditioning
Step up transformers are installed at the output of online UPS systems to match UPS output voltage to the voltage the connected equipment actually requires. A common requirement in data centres and telecom installations.
How a Step Up Transformer Works
Simple physics. The secondary coil has more turns of wire than the primary. More turns means a higher induced voltage at the output. While the voltage goes up, the current comes down proportionally, keeping power roughly the same minus efficiency losses.
Lower Voltage Enters the Primary
The lower voltage AC supply connects to the primary winding. The primary turn count determines the input voltage rating of the transformer.
Magnetic Field Is Created in the Core
Current in the primary creates a changing magnetic field in the CRGO silicon steel core. This field links both windings and transfers energy from primary to secondary.
Higher Voltage Induced in Secondary
The secondary winding has more turns than the primary. More turns means a proportionally higher induced voltage. A 1:2 turns ratio doubles the voltage at the output.
Higher Voltage Delivered to Machine
The secondary delivers the stepped-up voltage to your machine. As voltage increases, current decreases proportionally, keeping power roughly constant across both sides.
Step Up Transformer Specifications & Capacity Range
| Specification | Single Phase | Three Phase |
|---|---|---|
| Capacity Range | 1 KVA – 1000 KVA | 1 KVA – 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 | Air Cooled / Oil Cooled | Air Cooled / Oil Cooled |
| Winding Material | High Grade Copper | High Grade Copper |
| Core Material | CRGO Silicon Steel | CRGO Silicon Steel |
| Efficiency | Above 98% | Above 98% |
| Insulation Class | Class F (155°C) | Class F (155°C) |
| Vector Group | N/A | Delta/Star, Star/Star, Star/Delta |
| Enclosure | Open / IP21 / IP42 / IP56 | Open / IP21 / IP42 / IP56 |
| Certifications | ISO 9001, NABL Tested, SONCAP Certified (Bureau Veritas / SGS / Intertek) | |
| Warranty | Minimum 2 years | |
| Custom Options | Any input/output voltage ratio, KVA rating, winding configuration available on request | |
Features of Purevolt Step Up Transformers
- Accurate voltage step up to any required output level from any input
- Delta/Star, Star/Star, Star/Delta winding configurations available
- CRGO silicon steel core for low iron losses and stable performance
- High grade copper windings for minimal resistive losses
- Air cooled and oil cooled options depending on KVA and site conditions
- IP21, IP42, and IP56 rated enclosures for indoor and outdoor use
- Step up isolation transformer option with full galvanic isolation
- 50 Hz and 60 Hz designs for Indian and international supply standards
- Digital metering for input and output voltage monitoring
- Custom KVA ratings and voltage combinations built to specification
- Above 98% efficiency at full load in standard designs
- Minimum 2 year warranty on all units
Most Common Step Up Transformer Configurations We Supply
These are the most frequently ordered voltage conversion ratios. All available in single phase and three phase. Custom ratios available for any application not listed here.
| Voltage Conversion | Typical Application |
|---|---|
| 240V to 480V (3 Phase) | For machinery imported from the USA |
| 220V to 440V (3 Phase) | General industrial step up |
| 200V to 415V (3 Phase) | For Japanese machinery |
| 240V to 415V (3 Phase) | Australian or UK equipment running in India |
| 110V to 220V (1 Phase) | Small US appliances and equipment |
| Custom voltage ratio | Any input to any output — contact us with your specs |
Which Type Is Right for Your Application?
Both types deliver the same accurate voltage step up. The difference is in cooling method, operating environment, and maximum KVA capacity.
- Offices, hospitals, IT companies
- Moderate ambient temperature (below 45°C)
- Indoor, clean environments
- Small to medium KVA (up to 200 KVA)
- CNC machines, labs, packaging equipment
- Lower upfront cost
- Power plants, solar farms, wind installations
- High ambient temperature (Africa, Middle East)
- Outdoor installations and export orders
- Large KVA and 24/7 continuous operation
- Marine and offshore applications
- Longer service life in tough conditions
Winding Configurations Explained Simply
Three phase step up transformers are available in three main winding configurations. The right one depends on your specific application and supply arrangement.
Delta / Star (Δ/Y)
Primary in delta, secondary in star. Star secondary gives a neutral point for grounding. Standard for power plant step up applications where you are feeding into a high voltage grid. The most common configuration for generation-side step up.
Star / Star (Y/Y)
Both sides in star. Used when you need a grounded neutral reference on both input and output. Good for sensitive loads and applications where both sides of the transformer need a stable neutral point.
Star / Delta (Y/Δ)
Primary in star, secondary in delta. Less common for step up but used in specific industrial configurations. Our engineers will confirm if this configuration suits your particular application before the order is placed.
Where Are Step Up Transformers Used?
Anywhere the local supply voltage is lower than what the connected equipment or machine requires. These are the most common sectors we supply.
How to Select Your Step Up Transformer
Five things to confirm before placing an order. Share these with our team and we will specify the right unit and send a quote within 24 hours.
Countries We Regularly Export Step Up Transformers To
We supply step up transformers across all Indian states and export to over 30 countries. ISO 9001 and SONCAP certifications accepted in all major import markets.
Frequently Asked Questions
Clients
Trusted by MNCs, government organisations, hospitals, and industrial leaders across India and 30+ countries worldwide.
User Reviews
Real feedback from customers across Africa, the Middle East, and Asia.
Joy
Nigeria — 3 Phase Step Up Transformer
Iqbal
Saudi Arabia — Step Up Isolation Transformer
Mohammad
Iraq — Step Up Transformer for Imported Machinery
Overseas Installations & Trade Shows
From 240V to 480V step up units for US machinery in Indian factories to oil cooled step up transformers in Nigerian power plants and solar farm installations in the Middle East.
See Our Manufacturing Facility
Watch how Purevolt designs, winds, assembles, and tests step up transformers at our Okhla, Delhi factory