1SBN030111R1000

ABB 1SBN030111R1000 – VEM4 is a combined mechanical and electrical interlock set designed for interlocking two compatible ABB AF contactors. It is mainly used where two contactors must never close simultaneously, such as forward/reverse motor starters, reversing circuits, changeover arrangements and other electrically interlocked contactor combinations. The VEM4 assembly combines a VM4 mechanical interlock unit with two BB4 fixing clips and a VE4 electrical interlock block.