Substation grounding systems IEEE 80
Instalación de puestas a tierra Para la instalación de las puestas a tierra de los circuitos de distribución en MT, BT y equipos conectados del sistema, los puntos de tierra de cada pararrayos se deben conectar entre sí, mediante alambre de cobre o cobrizado (copperweld) No 4 AWG, hasta la varilla enterrada, evitar dobleces agudos, usar un conector apropiado o soldadura exotérmica. En los transformadores de distribución se deben conectar entre sí el neutro y la carcasa, mediante alambre de cobre o cobrizado (copperweld) No 4 AWG y desde allí hasta la varilla de puesta a tierra. Una sola bajante para puesta a tierra de los pararrayos y transformador. El neutro de la red de BT se debe poner a tierra cada cinco postes, igualmente los puntos finales de los neutros del circuito. El alambre se debe proteger con un tubo metálico de ½” x 3,0 metros. En los circuitos de MT con neutro o cable de guarda se debe aterrizar todos los postes. En las transiciones de los cables subterráneos de MT,
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