Solid-State Switching Devices for Switching Motors Solid-State Contactors 3RF24 solid-state contactors, three-phase I = 4 a I e I = 1 b I e 10000 Switching frequency 1/h 1000 Starting time 100 = 0,05 s a = 0,1 s a = 0,2 s a = 0,4 s a = 0,8 s a = 1,6 s a = 3,2 s a NSB0_01782b 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 = 4 a e = 0,6 b e Switching frequency 1/h 1000 Starting time = 0,05 s a = 0,1 s a = 0,2 s a = 0,4 s a = 0,8 s a = 1,6 s a = 3,2 s a 100 NSB0_01783a 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 59 Siemens · 2009