Riello 3438964 Installation, Use And Maintenance Instructions page 42

D2049
F1 Power line fuses
F2 Control devices fuse
F3 Thermal relay to be set at 10.2A for 400V
KL1 Line contact maker
KS1 Star contact maker
Timer relay for switching from star to delta 
KT
(factory calibration at 10s)
KT1 Delta contact maker
MA Starter terminal strip
Q1 Disconnecting switch with interlock
2915844
STAR-TRIANGLE STARTER
or at 17.6A for 230V
8
GB