Symbols of Transmission Lines (Electrical Distribution)

The transmission lines and the electrical distribution systems form the set of structures and devices (transformers, cables, poles ...) responsible of transporting electricity from the source of generation to the final consumption centers.

https://www.electrical-symbols.com/electric-electronic-symbols/lines-electrical-distribution-symbols.htm

Símbolos de Relés

Los relés son dispositivos de conmutación activados por señales. La mayoría de las veces, se utiliza una pequeña tensión o corriente para conmutar otras tensiones o corrientes mayores.

https://www.simbologia-electronica.com/simbolos-electricos-electronicos/simbolos-reles.htm

Symbols of Transistors MOSFET and IGFET

Transistors of field effect (MOSFET and IGFET) are transistors constituted by a filament generally made of semiconductor silicon, called channel, and an associate diode called door. 
These symbols can be represented inside a circle.

https://www.electrical-symbols.com/electric-electronic-symbols/transistor-mosfet-symbols.htm