Inquiry ()
Why is "Mechanical Interlocking" mandatory on crane switches? Isn't electrical interlock enough?
Electrical interlocks (configured via relays or PLCs) can fail if contacts weld together or software glitches occur. A mechanical interlock places physical barrier cams inside the switch housing. When "UP" is pressed, the "DOWN" button is physically blocked from moving. This dual-layer protection prevents catastrophic motor short circuits.