Ferrite Cores Symbols

 The ferrite cores are ceramic tiles with a critalina structure from the iron with magnetic properties. Filters are used in cables, inductor cores, transformers ... to cancel or mitigate the eddy currents.

PDF: https://www.electrical-symbols.com/electrical-electronics-pdf/Ferrite_Cores_Symbols.pdf

WEB: https://www.electrical-symbols.com/electric-electronic-symbols/ferrites-cores-symbols.htm

Símbolos Eléctricos de Aparatos Telefónicos

 El teléfono es un dispositivo eléctrico / electrónico, que transmite señales acústicas transformadas en señales eléctricas, a través de cables o ondas de radio, a grandes distancias.

PDF: https://www.simbologia-electronica.com/electricos-electronicos-pdf/Simbolos_Electricos_Aparatos_Telefonicos.pdf

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

Radiations Symbols

These symbols indicate that certain devices are susceptible to modify their properties or characteristics by sensitivities to the effects of external radiactive elements.

PDF: https://www.electrical-symbols.com/electrical-electronics-pdf/Radiations_Symbols.pdf

WEB: https://www.electrical-symbols.com/electric-electronic-symbols/radiations-symbols.htm