ABB 1751-0-1724 1789 LI-21 Rocker “Light” Alpha Bs Description Description ABB 1751-0-1724 1789 LI-21 Rocker “Light” Alpha Bs Related products ABB 2TLA042023R0100 ABB ACS550-01-038A-4 ABB 2TLA040001R1000 ABB GJV3074397R1 ABB ACS60100203 ABB 2TLA040037R1300