Ensures operation of machinery and electrical equipment by completing preventive maintenance requirements on drives, backup power systems, motors, pneumatic tools, conveyor systems, and other electrical related systems; following diagrams, sketches, operations manuals, manufacturer's instructions, and engineering specifications. Electrical Systems: servos, variable frequency drives, measuring systems, DC circuits, batteries, transformers, AC circuits, DC equipment/controls, three-phase systems, wiring, DC shunt motors, control relays, across-the-line starters, limit switches, electronic switching and electrical energy and power relationships.