Trapped Key Mechanical Isolation of Switchgear (Die-Cast)

Mechanical isolation devices, such as bolt interlocks, provide a robust method of isolating electrical switchgear to prevent the unintended return of hazardous electrical energy.

M-BS and M-BD interlocks are specifically designed to prevent access to control panels until the switchgear has been safely isolated. When the key or keys are removed, the bolt is locked in the extended position, physically preventing the re-energization of the switchgear until the correct key is returned. This ensures that strict power isolation procedures are followed before access is granted.

For gate interlocking applications, it is critical that the bolt remains captive when retracted until the guard is securely closed. If the bolt can be extended while the guard is open, there is a significant risk of serious injury.