Magnetic components, namely, transformers, electrical reactors, electrical chokes, electrical filters and electric coils; circuit boards, power supplies; generator set controls, namely, generator voltage regulators, digital excitation controllers for electrical generators, generator exciter voltage/current regulators, electrical series boost option assemblies for fault current support of a generator, manual voltage control assemblies for manually controlling generator excitation current/voltage and underfrequency overvoltage assemblies for protection of a generator; electric protective relays, namely, multifunction digital protective relays, reverse power relays, synchronous motor pullout relays, voltage relays, protection systems, negative sequence relays, loss of excitation relays, directional phase and ground overcurrent relays, reclosing relays, frequency relays, differential relays and overcurrent protective relays, automatic synchronizers for connecting generators in parallel to other generators or the utility grid; electric motor speed controls for constant and variable speed motors; battery chargers; electric generator controls, static power assemblies for converting AC voltage/current to DC voltage/current and uninterrupted power assemblies; and electrical assemblies in the nature of electrical components and electrical subassemblies mounted in a pan chassis or excitation systems in cubicles; and electrical subassemblies in the nature of circuit board assemblies, circuit boards, electrical voltage regulator accessories in the nature of power isolation transformers, excitation limiters and volt-ampere reactive/power factor controllers, and power modules, transformer rectifier assemblies for use in excitation systems, control assemblies in the nature of electronic controllers for use in excitation systems including manual voltage controllers for electrical generators, power factor and kilowatt controllers, including electrical/electronic sensors, heat sink assemblies for use in excitation systems and static variable voltage assemblies for use in excitation systems; electronic controllers for industrial engines to control power units that utilize reciprocating engines; power inverters; computer software for the configuration and monitoring of protective relays and excitation control, protection, multifunction meter and power system stabilizer systems, generator set controls and digital voltage regulators; computer software for the display, analysis and management of transient data from electric power systems