IEEE Power & Energy Magazine - Spanish - March/April 2022 - 85

Logro del objetivo final
El primero de abril de 1926, los alimentadores
trifásicos de 13,200-V
de las estaciones generadoras de
Sherman Creek y Hell Gate se conectaron
directamente a la red de
transformadores; inicialmente abastecidos
por alimentadores de 3,000-V
de las subestaciones transformadoras
ya establecidas. Con el tiempo, se eliminaron
tanto las subestaciones transformadoras
como los cables alimentadores
pesados de 3,000-V de esas
subestaciones. Las redes de distribución
alimentadas directamente de la
estación eléctrica reducía el costo de la
distribución de CA a un 20-25 % de la
de un sistema de CC equivalente.
United continuó sus experimentos
para determinar la caída de tensión en
los cables y también para mejorar la
confiabilidad. Los relés de protección
que funcionaban bien en tensiones más
bajas no siempre se podían usar con
tensiones más altas, y se necesitaban
nuevos diseños. Los primeros relés
eran relativamente simples, eran motivados
por la corriente magnetizada de
los transformadores producida por el
flujo de la corriente de carga de los cables.
Esos valores relativos cambiaron
las tensiones más altas y se necesitaban
relés de cierre independientes para evitar
el " accionamiento " (apertura y cierre
repetitivo) del relé de protección. En
un caso, la corriente regenerada de los
motores elevadores era suficiente para
desencadenar el accionamiento cuando
las cargas eran livianas. Se necesitaban
nuevos esquemas de conexión de relés.
A fines de 1928, la validez de la red
de United era clave en la decisión del
presidente de Edison en Nueva York,
Matthew Sloan, de que el sistema completo
de distribución de CC en Manhattan
no se seguiría expandiendo y se
cambiaría a CA con el tiempo. Específicamente
indicó que " dada la rentabilidad,
confiabilidad y eficiencia " de la
red de United, " no había justificación
para la continua extensión del sistema
de CC de Edison " . Los anuncios subsiguientes
detallaban los planes para retirar
el sistema de CC. Edison de Nueva
York había sido la única excepción a la
marzo/abril 2022
ieeepower & energy magazine
85
tendencia de reemplazar la distribución
de CC hasta que la red automática de
United finalizó este estado.
Redes verticales y puntuales
La naturaleza de la red automática
se prestaba para la instalación de
edificios más grandes a medida
que los alimentadores de 13-kV se
extendían a puntos estratégicos en
estructuras altas. El primer edificio de
la Ciudad de Nueva York que tenía este
(continuación en la pág. 90)
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IEEE Power & Energy Magazine - Spanish - March/April 2022

Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - Spanish - March/April 2022

Contents
IEEE Power & Energy Magazine - Spanish - March/April 2022 - Cover1
IEEE Power & Energy Magazine - Spanish - March/April 2022 - Cover2
IEEE Power & Energy Magazine - Spanish - March/April 2022 - Contents
IEEE Power & Energy Magazine - Spanish - March/April 2022 - 2
IEEE Power & Energy Magazine - Spanish - March/April 2022 - 3
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IEEE Power & Energy Magazine - Spanish - March/April 2022 - 81
IEEE Power & Energy Magazine - Spanish - March/April 2022 - 82
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IEEE Power & Energy Magazine - Spanish - March/April 2022 - 85
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IEEE Power & Energy Magazine - Spanish - March/April 2022 - 90
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IEEE Power & Energy Magazine - Spanish - March/April 2022 - 100
IEEE Power & Energy Magazine - Spanish - March/April 2022 - 101
IEEE Power & Energy Magazine - Spanish - March/April 2022 - Cover3
IEEE Power & Energy Magazine - Spanish - March/April 2022 - Cover4
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