The ABB 3ADT218520S0121 is a DCS880-S01-0315-04 two-quadrant DC converter rated for 400 VAC input and 315 A output, built in frame size H3.
The 315 A rating on the 400 VAC line positions this converter for medium-current DC motor drives in industrial lines. Frame size H3 determines the physical mounting footprint and bus-bar arrangement — verify panel cutout and cable entry against the DCS880 mechanical drawings before specifying. Sound level is listed at 60 dB(A) — within typical range for a forced-air-cooled converter of this current class, but worth noting if the cabinet sits near a quiet zone.
Integration notes
The converter is a two-quadrant type (2Q), so it handles motoring and regenerative braking in one direction only — not suited for reversing or full four-quadrant applications without an external reversing contactor or additional hardware. Auxiliary terminals carry an IP00 degree of protection per IEC 60529 and IEC 60947-1, meaning they are open to touch and require enclosure within a panel rated for the environment.