L46A1 Mast Section Discussion on the technical experience of removing the electrical fault of tower crane
(1) determine the location of electrical fault by inquiry division method
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That is to say, by asking the field operators to understand the operation of the main control system, lifting system, rotation system, luffing system, crane traveling system and other parts, to distinguish the primary and secondary, to eliminate some doubts, and to find out the system with possible faults.
(2) clear obvious electrical faults by observation, spring pressure and knocking
The methods are as follows: open the electric cabinet, first check whether the electric appliance has obvious signs of damage, scorch and loose connecting wire; then check the sensitivity of armature of contactor, wheel cleaning on various travel limit switches, start brake button, etc. If it is confirmed that everything is normal, a rubber hammer can be used to knock the working components, especially the moving components, when the tower crane is powered on. If the circuit fault disappears suddenly, it means that there is poor contact near the knocking component or the knocked component itself, which should be eliminated immediately.
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(3) use short circuit method and component replacement method to quickly remove electrical faults
That is, according to the electrical schematic diagram, the suspicious circuit parts are short circuited in turn to verify whether other components of the system are normal. If other parts are normal, the fault exists in the components of the short circuit part. At this time, the same components of other systems in the main control cabinet can be removed and replaced. If the fault is removed, the replaced components are damaged.
L46A1 Mast Section：
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