In 1956 FRIEM produced and installed its first 50kA Rectifier Unit for application in Chlor-Alkali industry.
With more than 60 years of experience FRIEM is World Leader in the design and manufacturing of Special Rectifiers and Power Converters for Industrial Applications rated up to 200 kA and 2000 V.
With continuous investments in research and development, FRIEM is capable to provide a complete Conversion System tailored on Customers’ requests, suited with each type of semiconductor (diodes, thyristors or IGBTs) and with the most advanced Digital Regulations and electronics.
MV Switchgears are used in Power Distribution and Industrial plants for supplying, protecting and switching the main power by means equipment combined according to system requirements.
The Rectifier Transformer, fully integrated in the Rectifier System, is entirely designed by FRIEM’s Technical Department to meet all types of installation conditions and to supply Thyristor Rectifiers.
This unit is specifically designed, case by case, to limit the inrush current during the start-up of the main rectifier transformer by pre-magnetizing the core from an independent power supply.
Special Rectifiers and Power Converters (IEC ord ANSI/IEEE Standards compliant) tailored on Customers’ application to reach the best trade-off between technical performances and operational flexibility.
A comprehensive line of Digital Regulators for all the different types of Power Converters. The DRP-Line concept is developed from the former FRIEM’s Analog Regulators REGAS and combines high performances with a user-friendly interface.
Containerized rectifier suited for outdoor installation especially in harsh weather and climatic conditions to provide utmost reliability, availability and efficiency throughout complete process.
The Emergency and Polarization rectifiers are designed to supply the electrolyser cells with reduced load during the tripping/non-functioning of main rectifier, with maximum DC current clamping facility irrespective of output voltage.
HCD High Current Disconnect Switches
A wide range of high current isolating/disconnect switches selected case-by-case among different technologies, in order to achieve the most efficient and maintenance-friendly layout.
Power Factor Compensator & Harmonic Filter System
Aiming at energy saving and power quality improvement, FRIEM designs and supplies Power Factor Compensator & Harmonic Filter System properly tuned on the harmonics generated by the rectifier.