Our managed transformer manufacturing lines bring together over 45 years of expertise in designing transformers tailored to client needs, delivering excellence worldwide. We offer the full range of transformers from low voltage distribution units to high voltage power transformers with nation-wide support and service.
Our transformers are designed, manufactured and tested in accordance with applicable NEMA, IEEE and ANSI standards and have efficiency levels at or above DOE 2016 requirements. UL certifications are available on request. Customers can customize their units with a variety of accessory options to meet specific requirements. Our team specializes in managing intricate, customized needs such as K-rated, non-standard LV placements for close-coupling low-noise transformers, multiple LVs etc
BIL ratings as per IEEE C57.12.90
Electrostatic Shield
Lifting Lugs & Ground Pads
Standard dB levels as per NEMA TR-1 standard
C4 corrosion protection
Dead-break HV Bushings
Bushing wells & Parking stands
2/4/6/8/10/12 hole Live-spade LV bushings
Hot-dip galvanized radiators
De-energized Tap Changers
100-10,000 KVA
2400 – 34,500 V Primary voltages
208Y/120 – 4,160 V Secondary voltages
3-phase
60 or 50 Hz
ONAN or KNAN
Mineral oil, FR3, Silicone, Beta Fluid, Alpha Fluid
Aluminium/Copper Windings
Standard impedance according to ANSI C57.12.26
Electrostatic paint system
Full protected, fuses and breakers
Complete, in-house production testing per ANSI C57.12.34 and enclosure integrity confirming to ANSI C57.12.28 and customer specifications as applicable, including:
Multi-LV transformers
Low-noise transformers
K-rated transformers
Dead-break Lightning arrestors
External Flange/Throat
Non-standard Ambient conditions (temperature, seismic rating, wind, altitude etc)
Corrugated Tanks
hermetically sealed transformers
Five-limb transformers
Special paint for marine or corrosive atmosphere
Complete, in-house production testing per ANSI C57.12.34 and enclosure integrity confirming to ANSI C57.12.28 and customer specifications as applicable, including:
Ratio tests on rated voltage connection and tap connections
No-load loss at rated voltage
Resistance Measurement on all windings
Polarity & Phase Relation tests on the rated voltage connection
Impedance & Load loss
Induced Potential test
Excitation Current Test
Pressure Leak Test
Applied Potential Tests
Power Factor & Tan Delta measurement
Lightning Impulse Test
Switching Surge
Transients Measurement
Partial Discharge
Front of Wave
Temperature Rise Test (including thermal imaging)
Short-Circuit Test
Sound measurement test
Sweep Frequency Response
Following special type-tests to be done either in-house or at an independent accredited laboratory based on request
Switching Surge
Temperature Rise Test (including thermal imaging)
Short-Circuit Test
Sweep Frequency Response
new laboratory NRTL
American National Standards Institute (ANSI)
Institute of Electrical and Electronics Engineers, Inc. (IEEE)
National Electrical Manufacturers Association (NEMA)
Department of Energy (DOE)
UL Listing
Ayr Energy provides liquid-filled distribution transformers built for diverse sub-station, commercial, and industrial applications. These transformers come with a selection of dielectric coolants, such as mineral oil, silicone fluid, and fire-resistant FR3, and feature sturdy tank designs for enhanced durability.
225 to 20,000 kVA
Standard Gauges & Relays
Lifting Lugs
2400 – 69,000 V Primary voltages
220Y/127 – 34,500 V Secondary voltages
3-phase
60 or 50 Hz
ONAN, ONAN/ONAF, KNAN, KNAN/KNAF
Mineral oil, FR3, Silicone, Beta Fluid, Alpha Fluid
Aluminium/Copper Windings
Standard impedance according to ANSI C57.12.3
Multi-LV transformers
Multi-CCA transformers
Low-noise transformers
K-rated transformers
External Flange/Throat
Five-limb transformers
Special paint for marine or corrosive atmosphere
Non-standard Ambient conditions (temperature, seismic rating, wind, altitude etc)
Complete, in-house production testing per ANSI C57.12.90 and customer specifications as applicable, including:
Ratio tests on rated voltage connection and tap connections
No-load loss at rated voltage
Resistance Measurement on all windings
Polarity & Phase Relation tests on the rated voltage connection
Impedance & Load loss
Induced Potential test
Excitation Current Test
Pressure Leak Test
Applied Potential Tests
Applied Potential Tests
Sound measurement test
Switching Surge
Partial Discharge
Following special type-tests to be done either in-house or at an independent accredited laboratory based on request
Switching Surge
Temperature Rise Test (including thermal imaging)
Short-Circuit Test
Sweep Frequency Response
American National Standards Institute (ANSI)
Institute of Electrical and Electronics Engineers, Inc. (IEEE)
National Electrical Manufacturers Association (NEMA)
Department of Energy (DOE)
UL Listing
Ayr Energy’s Dry transformers are engineered to cover a wide range of needs, with voltage capacities spanning from 5kV to 34.5kV and power ratings from 500 kVA to 10,000 kVA. Leveraging our engineering expertise, we design precise high-voltage and low-voltage interfaces, enabling seamless integration in various installations. For projects requiring unique solutions, Ayr Energy offers customized designs, including low-loss designs, switchgear coupling etc.
100 kva – 5,000 kva
600 V to 34.5 kV
220°C insulation system
Indoor – NEMA 1, Outdoor – NEMA 3R/4
Aluminium/Copper Windings
3-phase
60 or 50 Hz
Type of core
Barrel wound
Section wound
Disk wound
Complete, in-house production testing per ANSI C57.12.90
Routine Tests
Resistance test
Polarity & phase relation test
Turns ratio test at all tap positions
No-load loss & exciting current test
Impedance and load-loss test
Applied potential test
Induced potential test
Impulse test
Sound test
Special tests
Temperature test
Partial discharge test
American National Standards Institute (ANSI)
Institute of Electrical and Electronics Engineers, Inc. (IEEE)
National Electrical Manufacturers Association (NEMA)
Department of Energy (DOE)
UL Listing
Our power transformer is designed for unparalleled reliability, ensuring stable performance even under the most demanding conditions. By sticking to stringent quality control measures, leveraging best-in-class design tools and manufacturing processes, and using the best materials and components, these transformers consistently exceed the expectations of our customer. We have also expertise in delivering Safe-Harbor for projects through Power Transformers on ultra-fast timelines.
Up to 500 MVA
Upto 765 KV voltages
3-phase
60 or 50 Hz
Surge Arresters
OLTC on HV/LV for HV/LV variation
Insulating mineral oil as per IS/IEC
Drain/Filter/Sampling valves
Standard Gauges & Relays
Lifting Lugs
Current transformers
ONAN, ONAN/ONAF, ONAN/ONAF/ONAF, OFAF
NEMA 3/4 Control Cabinet
C4 corrosion
Spare parts - Gaskets
Valves, Paints, & Toolkit
Flanged roller assembly to suit standard rail gauge
Multi-CCA transformers
Low noise level Transformers
OFAF Cooling using oil pumps or compact unit coolers
OFWF Cooling using oil pumps & heat exchangers
Air led cable box up to 33 KV
Oil filled cable box up to 400 KV
Special paint for marine or corrosive atmosphere
Sealed Tank Preservation Systems
High-Seismic-Rating zone
Safe Harbor
Audible Sound level measurement at the factory
Dew Point in degrees Fahrenheit of air in the tank
Zero Phase Sequence Impedance Test
Power Factor
Pressure of air in the tank
Core Ground Resistance
SFRA at the factory
SFRA prior to Shipping (loaded on trailer)
Sweep Frequency Response Analysis on-site
DGA (Dissolved Gas Analysis) – before and after dielectrics & each sample for temperature rise tests or otherwise
Temperature Rise Test (Base & Top rating only)
Doble Excitation Test
Lightning Impulse Test as per IEEE C57.12.90.
Applied Potential Test as per IEEE C57.12.90.
Induced Voltage Test as per IEEE C57.12.90.
Partial Discharge Measurement Test
Switching Impulse Test (if applicable) as per IEEE C57.12.90
Ductor Test
Routine Test on all units as per IEEE at the factory
Resistance measurement
Ratio tests
Polarity and Phase Relation
Insulation Resistance Measurement
Insulation Power Factor
Impedance and Load loss measurement
Excitation Losses and percentage excitation current measurement
Percent Impedance and Load Loss Measurement
Power Factor and capacitance for Bushing (DGA if applicable)
