Power transformers are essential equipment in medium- and high-power transmission and distribution systems. Designed to operate with maximum reliability, they play a key role in interconnecting different voltage levels, ensuring energy efficiency and operational safety.
Technical Features
- Rated power: from 300 kVA up to 5,000 kVA
- Typical primary distribution voltages: 4.16 kV, 7.2 kV, 13.2 kV, 13.8 kV, 25 kV, and 36.2 kV
- Secondary voltages: 380/220 V, 220/127 V, 480/277 V, 440/254 V, 208/120 V, 600/346 V, and 800/462 V
- Frequency: 50 or 60 Hz
- Cooling: ONAN (Oil Natural, Air Natural)
- Temperature rise class: 55/65 °C
- Applicable standards: ABNT NBR 5356, NBR 5440, IEC 60076, and INMETRO
- Connections: Delta/Star (Dyn1, Dyn5, Dyn11) and variations upon request
- Tap changer: ±2×2.5% or ±5×2.5% (manual or automatic upon request)
- Insulating oil: Mineral or biodegradable (vegetable) available upon request
Benefits
- High energy efficiency, reducing electrical losses
- Reliability and durability, even under continuous operation
- Capability to meet a wide range of applications, from industries to utilities
- Versatility in power ratings and voltages, adapting to different projects
- Low maintenance requirements when properly installed and operated
Main Applications
- Public Infrastructure – Airports, bus terminals, ports, and metro/train stations
- Medium and Large Industries – Supplying power to machines, motors, and production processes
- Commercial Centers and Shopping Malls – Supporting high demands of lighting and HVAC systems
- Hospitals and Healthcare Complexes – Reliable supply for critical equipment
- Renewable Power Plants – Integration of solar, wind, and small hydro plants into the grid