Solid-State Switching Devices for Switching Motors Solid-State Contactors 3RF24 solid-state reversing contactors, three-phase I = 4 a I e I = 1 b I e 10000 Operating frequency 1/h 1000 Starting time 100 t = 0,05 s a t = 0,1 s a t = 0,2 s a t = 0,4 s a t = 0,8 s a t = 1,6 s a t = 3,2 s a NSB0_01786 10 0,01 0,1 1 10 100 1000 in s OP t For motors with a starting current of up to 4 times the rated current and with a full load 10000 I = 4 a I e I = 0,6 b I e Operating frequency 1/h 1000 Starting time t = 0,05 s a t = 0,1 s a t = 0,2 s a t = 0,4 s a t = 0,8 s a t = 1,6 s a t = 3,2 s a 100 NSB0_01787 10 0,01 0,1 1 10 100 1000 in s OP t For motors with a starting current of up to 4 times the rated current and with a 60 % load 65 Siemens · 2009