1SFN034403R1000

The ABB VM140/190 Mechanical Interlock Unit is designed for use with selected ABB AF contactor combinations. It mechanically interlocks an AF116–AF146 contactor with an AF190–AF205 contactor, preventing one contactor from closing while the other is closed. This helps avoid simultaneous operation in switching arrangements where the contactors must operate one at a time.

Identified by ABB part number 1SFN034403R1000, the VM140/190 belongs to ABB’s AF contactor accessory range. It is intended for the specific contactor pairing listed by ABB, so confirm both contactor models and the installation arrangement before purchase or fitting.

Ahmedabad Electric Corporation supplies ABB switchgear and automation products and can help check the availability and compatibility of this interlock for your application.