Multi-function Electric Crane And Hoist emergency troubleshooting measures

Multi-function Electric Crane And Hoist emergency troubleshooting measures

The motor of Electric Crane And Hoist can not start when it is no-load

Cause of fault: power line, stator three-phase has a phase of power off, power supply voltage is low.

Elimination method: check voltage between the power cord, check the fuse, and each phase voltage power supply, check, check whether spring and shaft hole is stuck.

When the motor of Electric Crane And Hoist load can’t start.

The cause of the problem: the stator winding interturn short circuit, overload, low voltage.

Elimination method: check each phase resistance and electric circuit, check the motor load power supply, check the voltage.

The Electric Crane And Hoist Motor overheating

The cause of the problem: motor stator winding interturn short circuit, low power supply voltage is too high, motor overload, brake slow.

Elimination method: motor stator winding, check the motor load power supply, check the power supply voltage, check whether spring and shaft hole is flexible.

Blown fuse

The cause of the problem: two phase short circuit, the heavy load, the voltage is too low.

Elimination method: repair winding, lighten the load, higher voltage.

Low insulation resistance or breakdown

Cause of failure: phase to ground short circuit, insulation aging or damage, unclean, windings or wiring dampened, motor overheating.

Elimination method: repair winding, check insulation, dry compressed air blowing, drying or treated with open, open the inspection, to prevent fever.

The vibration of the motor is larger and the noise is too loud

The cause of the problem: the shaft hole clearance is too large, improper assembly, bearing damage or adverse, rotor imbalance, uneven air gap.

Elimination method: check the size of shaft hole, check the condition of the device, adjust it, replace the bearing, check the balance, check the tolerance of the size and shape, and adjust the air gap.

Brake failure

Fault reasons: brake ring wear, spring failure, friction surface is not clean.

Elimination method: replacing the brake ring, changing the spring and cleaning the friction surface.