high voltage, high current and high power test systems and components, namely, megohm meters, transformer test equipment, high voltage transformers, direct current and alternating current motor test equipment, core loss testers, alternating current dielectric and resonant test equipment, direct current insulation test equipment and power supplies, high current test equipment for testing thermal and magnetic overloads, ratioing current transformers and testing high current breakers, equipment to test heat cycles of power cables, voltage and current regulators and stabilizers