Siemens 3RK1308‑0 00‑0CP0 Series Equipment Manual page 87

Example for the minimum idle time (T
The graphic below shows the minimum idle time of a 12 A motor starter with the following
parameters:
I
rated_motor
I
startup/Irated_motor
T
Startup
Motor starter (3RK1308‑0**00‑0CP0)
Equipment Manual, 11/2019, A5E34821005002A/RS-AC/003
) 12 A motor starter at I
Off
= 10.4 A
= 8.6; thus: I
Startup
= 0.125 s T ≥ 19 s
Off
Startup/
≈ 89 A
6.6 Calculating switching cycles
I = 8
rated
Functions
87