ABB Contactor Interlock for use with AF09 to AF38 Series

The is a mechanical interlock unit designed for the interlocking side-by-side without additional width of two 3-pole or 4-pole AF09 to AF38, AFC09 to AFC38, and AFS0 AFS38 contactors. When mounted between two contactors, the VM4 mechanical interlock unit prevents one of the contactors from closing as long as the other contactor is closed. The mechanical interlock unit VM4 includes 2 fixing clips (BB4)

• Occupies minimal space, making it ideal for tight installations
• By mechanically preventing simultaneous closure of adjacent contactors, it enhances safety and prevents accidental short circuits
• The unit includes 2 fixing clips (BB4) for straightforward mounting between compatible contactors
• Suitable for use with AF09 to AF38 series contactors, including various pole configurations

• Use the VM4 to interlock motor contactors in control panels, ensuring proper sequencing and preventing unintended parallel operation
• Install it in machinery control circuits to prevent simultaneous activation of multiple loads
• Use in heating, ventilation, and air conditioning systems to interlock contactors for compressors, fans, and pumps

It is specifically designed for use with AF09 to AF38 series contactors.

When mounted between two contactors, it mechanically ensures that one contactor remains open while the other is closed.

Yes, the VM4 is commonly used in motor control panels to prevent parallel activation of motor contactors.