Study Unit Understanding and Using Electronic Diagrams

Study UnitUnderstanding andUsing ElectronicDiagramsByThomas GregoryIn your studies so far, you ve learned the basic principles ofhow electrical circuits provide power for useful work. Basiccircuits consist of a power source, components that regulatethe flow of current, and loads such as motors, lights, heat-ers, and more complex devices like computers or and Electronic technicians may work installing,servicing, maintaining, and troubleshooting hundreds of dif-ferent electrical and electromechanical devices from manydifferent manufacturers, on a regular basis. Over the years astandard visual language has evolved that allows designers,engineers, and technicians to effectively describe these elec-trical devices functions. In this unit you ll learn how circuits are described by draw-ings called schematics. These drawings use standard symbolsthat allow technicians to quickly understand how a circuit isconstructed, what function it performs, and how to trouble-shoot the equipment.

4 Understanding and Using Electronic Diagrams Lighting Arrester Gap Air Circuit Breaker Oil Circuit Breaker Capacitor Adjustable Capacitor or Coil Contact (Make) - NO Contact (Make) - NC Contactor without Blowout Coils Contactor with Blowout Coils Disconnect Device Fuse Fusable Element Fused Cutout Hot-Line Conductor Inductor Magnetic-Core Inductor

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