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Q1
F3
F3*
Q11
Q21
Q22
M1
PE
SIRIUS 3RW51 Soft Starter
Equipment Manual, 09/2020, A5E37108631002A/RS-AC/003
Motor starter protector
aR partial-range fuse for protection of semiconductors (e.g. SITOR 3NE3/4 or 3NC)
gR full-range fuse for protection of semiconductors (e.g. SITOR 3NE1)
3RW51 soft starter
External bypass contactor
Motor contactor for electrical decoupling
Motor
Protective conductor
Example circuits
A.1 Main circuit connection
171
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