Transformer Rectifier Unit Cooled by Air in a Steel Enclosure

This air-cooled transformer rectifier automatically controls the electricity flow, providing the DC power needed for cathodic protection. It’s designed to be compact and lightweight, making it perfect for smaller setups in cleaner areas. Typically, it’s used to protect long pipelines, the insides of tanks, and steel structures buried underground or underwater.


  • Rectifier Module: Choose between Thyristor, High Frequency Switch, or Silicon Rectifier
  • Mode Switch: Automatic or Manual with 25-step outputs
  • User-friendly Touch Screen Panel
  • Clear LED Digital Display
  • Programmable Timing Interruption
  • Protection against Surges
  • Optional Lightning Protection
  • Optional Sun Protection
  • Optional Remote Data Transmission and Control
  • Optional GPS-Synchronized Current Interrupter

Additional information

AC Input

Single-phase: 220±10%V, 50±5%Hz, Three-phase: 380±10%V, 50±5%Hz

DC Output

100V, 50A

Insulation Resistance


Control Range


Control Accuracy



<80 dB

IP Level

IP44, IP66

Design Life

30 years