The 3RW4454-2BC46: That current rating is for standard starting duty — the inside-delta circuit configuration lets you size the starter for line current while the motor windings see phase current, effectively reducing the device cost for a given motor FLA. The integrated bypass contact system means the thyristors are shorted out once the motor reaches full speed, dropping heat dissipation in the enclosure and eliminating continuous conduction losses. For a 1065 A load, that's the difference between needing forced ventilation and running passive convection in a standard IP20 cabinet.
Protection and control features
Built-in motor overload protection, intrinsic device protection, and adjustable current limitation are all standard on this unit. The minimum load setting of 8 % means it handles lightly loaded conveyors or pumps without nuisance trips. An external reset input and a display for fault signals simplify troubleshooting on the line — no need to crack the panel to read a blinking LED code.
Mounting and wiring constraints
This is a large-frame unit: 640 mm high, 510 mm wide, 290 mm deep, mounted with screw fixing. The mounting position allows vertical surface mounting with ±90° rotation and ±22.5° tilt front/back — useful when you're squeezing it into an existing lineup. Main circuit connection is busbar, with the main cable range from 2/0 to 500 kcmil. Auxiliary and control wiring uses spring-loaded terminals accepting 24–16 AWG solid or stranded. Clearance: 100 mm upward, 75 mm downward, 5 mm at the sides — the side clearance is tight, so plan the gland plate accordingly.