Electrical interlocking is provided to avoid accidental simultaneous motions of crane due to activation of multiple push buttons at the same time. Limit switches are provided against over hoisting! over lowering and over travel in cross and longitudinal direction.

Hoist:

INDEF brand Wire rope electric hoist.
Hoist is generally conforming to IS 3938. Externally mounted TEFC. Squirrel cage, S4 Crane duty induction motor is provided for hoisting and lowering. Wire rope is as per IS 2266 and Hoist motor is as per IS 325 with class 'F insulation and (P-55 protection. Hoist drum is of seamless steel pipe. For other details refer wire rope hoist catalogue.