How to prevent danger of tower crane working?​

1. Check all electric parts wires and Electrical Cable regularly, and repair or replace the damaged parts timely.

2. Stop working in time when the motor is overheating, continue running after the trouble is cleared. The lubrication of motor bearing should be good.

3. Keep the contact surface of brush clean, adjust the pressure of brush to assure the contact area is above 50%.

4. Clean the dust on the electric equipment timely and keep the control box and distribution box clean.

5. Contact opening and closing of limit switch of each safety device must be reliable, and contact arc and pit should be polished timely.

6. Measure and protect the ground resistance twice a year (spring and autumn) to ensure it no more than 4 Ohms.