Rectifier Transformers

Rated voltage	up to 145 kV
Rated capacity	up to 180 MVA

Rated voltage

up to 145 kV

Rated capacity

up to 180 MVA

High Current Rectifier Transformers for AC/DC Industrial Applications

Specialtrasfo is a global leader in designing and manufacturing high current rectifier transformers specifically engineered for the toughest AC/DC industrial applications. Our oil-immersed rectifier transformers power some of the most demanding processes in aluminium smelting, graphite manufacturing, mining, hydrogen production, copper refining, and steel plants.

Our transformers are built to handle extreme high current rectifier loads with unparalleled reliability and performance. Designed for heavy industry in some of the harshest industrial environments worldwide, ZTELEC transformers ensure operational stability, long service life, and compliance with rigorous industrial standards.

DC Voltage up to

1000 V

DC current up to

180 kA

AC primary voltage up to

145 kV

Our Expertise

Transformer capacity: up to 180 MVA, optimized for large-scale rectifier loads

DC voltage: up to 1000 V for industrial DC power systems

DC current handling: up to 180 kA, ideal for ultra-high current applications in mining, aluminum, and steel industries

AC primary voltage: up to 145 kV, suitable for high voltage grid connection

Maximum transformer weight: 300 tons, engineered for robust industrial environments

Configurable transformer units: including single bridge, double bridge, double star with IPT (Interphase Transformer), and two double stars with IPTs

Multi-pulse topologies: from 12-pulse to 72-pulse units to reduce harmonics and improve power quality

Integrated regulating autotransformer: for on-load coarse voltage regulation within the same tank

Saturable reactors: included for on-load fine voltage regulation, enhancing operational flexibility