Gate craneMaintenance programmeConstruction programme for major maintenance of cranes. Preparation of standards for construction and inspection and acceptance based on crane designTechnical programmeExcerpts from the manual for maintenance and inspection of the use of heavy machine installations iElectrical equipmentThe maintenance of cranes, the maintenance of electric motors and regular inspections are important measures for the maintenance of electrical motors and should be carried out as required. When electrical motors are found to be malfunctioning, timely and accurate removal must take place with regard to the following motors: temperature, voltage, current, acoustic, heat-dispersion conditions, load size, rotor rotation (electricity and power outages), circuit insulation, insulation of extraction lines and lines, and flexibility of institutional transmission. Only when the fault is accurately located can it be eliminated in a timely manner. The power voltage to access the electric motor shall not normally be higher than or below 5% of the rated voltage, with a minimum of 15% below. The difference between any two-phase voltage in a three-phase power source cannot exceed 5% of the three-phase average. The range of the space between the fixed and rotor of the three different paced motors is 0. 25? 2mm. Small gaps and low power factors; small gaps and difficult assembly. The maximum motor speed for cranes is 2. 5 times the synchronous rate. The rolling bearing of the electric motor shall be refuelled once after running 1000? 1500h; 2500? 3000h. When oil is replaced, the bearings must be cleaned and then added to the new oil. There are no cracks in the seat and end caps, and otherwise it causes the deformation of the mouth to cause the fixed, uneven dyslexia between the rotors to cause motor vibrations, and, in serious cases, the cysts and rotors to interact to cause electrical motor damage. New or overhauled electrical motors before use, except
