RHONA designs and manufactures Power Transformers for energy transmission and distribution systems across medium and high voltage networks. Our transformers are engineered to operate under outdoor conditions with low noise levels, high efficiency, and minimal maintenance. They are widely used in power substations, renewable energy projects, industrial facilities, and utility-scale infrastructure.
We offer both standard configurations and custom-built units tailored to the specific electrical and dimensional requirements of each project. All RHONA transformers are manufactured with high quality materials and comply with international standards such as IEC and IEEE.
Power Rating: Up to 150 MVA
Primary Voltage: Up to 230 kV
Cooling Systems: ONAN / ONAF / OFAF / OFWF
Tap Changers:
De-Energized tap changer
On-load tap changers with or without remote control
Insulating liquids such as Mineral Oil, Vegetable Oil, Synthetic Esters.
Hermetically sealed or conservator tank design
Oil level indicator
Pressure relief valve
Buchholz relay
Winding and Oil Thermometers
Lifting lugs and grounding terminals
High-quality painting system for corrosion resistance
Control cabinets according NEMA standard
Removable or welded Radiators
Oil sampling valve
Dissolved gas analysis monitors
Digital monitor for temperature measurements
On-load tap changer with motor drive and control cabinet
Customized protections and sensors
RHONA Power Transformers are suitable for:
Primary and secondary substations
Industrial electrical networks
Renewable energy plants (solar, wind)
Utility transmission and distribution systems
Mining and large-scale industrial facilities
RHONA ensures technical support across all project phases—from engineering and production to testing, installation, and commissioning. With over 60 years of experience in the energy sector, RHONA provides trusted transformer solutions throughout Latin America and now available for the North American market.
