1SFN034700R1000

The ABB VM300H Mechanical Interlock Unit is designed to mechanically interlock two compatible ABB AX contactors. When mounted between the contactors, it prevents one contactor from closing while the other remains closed. This helps avoid simultaneous closure in switching arrangements that require the contactors to operate one at a time.

ABB specifies the VM300H for two horizontally mounted, AC- or DC-operated contactors. The contactors may have the same or different ratings, provided the selected combination follows ABB’s catalogue table. Confirm the exact contactor models, ratings and mounting arrangement before purchase or installation.

The VM300H provides mechanical interlocking. If the application also requires electrical interlocking or other control components, select those separately according to the circuit design. Ahmedabad Electric Corporation supplies ABB switchgear and automation products and can help you check product availability and suitability for your contactor combination.