Voltage regulators for synchronous machines & subassemblies

In 1986 IECO started cooperation with ABB Finland (called Strömberg at that time) in designing and manufacturing automatic voltage regulators (AVR). Since then, a versatile line of excitation products, subassemblies and control cabinets have been created. Product rights of the digital AVR originally developed by IECO were sold to ABB Switzerland in year 2000. This AVR subsequently formed the base of ABB's global Unitrol 1000 product family.

The key products in excitation at IECO are AVR plates & control cabinets and GX300 voltage regulators and their variants. Applications vary from power plants, large machines or ships to small back-up generators. In addition to GX-300 regulators, IECO has delivered DM-10 diode monitors which are used with brushless synchronous generators for detecting diode failure in the rotating rectifier.

Since 1986 IECO has delivered 4000 units of GX regulators including dozens of different excitation plate variations with both single and redundant AVR topology.

Commissioning services

In order to supply a full range of services IECO also provides commissioning services for voltage regulators and subassemblies.