If you have questions about our products, Fill out the form below and we will answer any questions you have. Tips: Fields marked with*are required. ABB PPD517A Exciter Control Module Introduction The ABB PPD517A Exciter Control Module is a high-performance excitation system controller designed for precise regulation of generator field excitation in industrial power systems. It is widely used in ABB’s excitation archit *Your Name: *Your Email: *Your Name: *Vdcode: Submit