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4. Con objeto de facilitar el paso de embarcaciones por un río se pide, diseñar la maniobra y fuerza de un puente levadizo que subirá con un pulsador de marcha y para volverlo a bajar se servirá de otro pulsador de marcha. Al ser el motor de gran potencia (más de 10HP) decidir la mejor manera de arrancarlo. Añadir la señalización por sobrecarga, una intermitencia que se pondrá en marcha en el primer instante en el que el puente comience a subir y que permanecerá hasta que el puente esté bajado y dos pulsadores de paro, uno que detenga toda la maniobra y otro que pare sólo el movimiento del puente en cualquiera de los dos sentidos (sin detener la intermitencia). Dibujar los esquemas de maniobra y fuerza.
N
F
RT
RT
L Sobrecarga
Paro puente
Paro total
P!
P!
C!
C!
C!
C!
C!
C!
FC!
FC!
C!
R!
R1
T2
T1
T2: 2”
T1: 1”
L1
R!
C!
C!
C Estr.
C Estr.
C Tri.
C Tri.
T3: 5”
T3
T3
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Enviado por: Jano Idioma: castellanoPaís: España