three phase electric hoist maintenance

1 after a new installation or dismantling installed three phase electric hoist, should first be empty commissioning several times. Former but not installed, avoid power test switch.
Should be carried out prior to normal use of the rated load of 2 to 125%, up from approximately 100 mm above the ground,portable electric hoist the static load test of 10 minutes, check whether it is normal.
3 Dynamic load test based on the weight of the rated load, as repeatedly lift and move around the test, checking the mechanical transmission parts After the test, the electrical part and the connecting portion is normal and reliable.
4 using three phase electric hoist, the absolute prohibition under circumstances not permitted, and exceed the rated load and nominal closing per hour (120 times) the case.
5. installation and maintenance, must strictly limit device is flexible and reliable inspection, when the limit was raised to the position of the hook, hook it to the shell casing from the rolls must be greater than 50mm (10t, 16t, 20t must be greater than 120mm). When the hook dropped lower limit position, should ensure the safety rope on the drum circle, circle must be safe and effective in more than two laps.
6. allowed to press the two make three phase electric hoist in the opposite direction of movement of the flashlight door button.
7 After the completion of the work must always pull the brake power, cut off the power.