Excitation System Testing & Troubleshooting – EUMAC engineers have a wealth of experience in testing and troubleshooting automatic voltage regulators (AVR) and exciters of all types.  Whether you need help with vintage magnetic amplifier & dc generator based systems (GE Amplidyne & Westinghouse Mag-A-Stat), solid state static systems (Generrex, SCT-PPT, & others), or brushless exciters (Westinghouse rotating rectifier) EUMAC is ready to meet your needs.