Machine tool equipment electrical troubleshooting,repair and matters needing attention

When find out the fault point electrical equipment,will begin to repair,commissioning,records,etc.,and then consign is used,but must pay attention to the following items:1.Find out the fault point and repair failure,can't find the fault points should be paid attention to as a search for the end of the fault must be further find out the root cause of the failure analysis.2.After find out the fault point,must according to different fault condition and the location corresponding to the correct repair method.3.In the repair work of fault point,under normal circumstances should electrical motor try to be recovered.4.Electrical fault repair finished,need electricity commissioning,cooperate with the operator,to avoid new failures.5.Every time after troubleshooting,should be timely sum up experience,and completes the maintenance records.

Records include: industrial machinery model,name,number,generator generator set the date of the failure,failure phenomena,parts,damage of electric appliance,the cause of the problem,after the repair measures and repair operation,etc.Record purpose: as a file as a reference for future maintenance,and through the analysis of all previous failures,take the corresponding effective measures to prevent similar accidents from happening again or improvements for the design of the electric equipment itself,etc.There is a bridge to communicate at a factory crane (model: PQR6-100 s capacity of 5 t),in operation,the crane upgrade machine (model: YZR225M an 8,2 kW) abnormal whistlers.Judgment is a gasoline generator mechanical failure at first,then check the gear bearing and gear shaft,result in good condition,will load disconnect,the motor idling,screaming.


Judgment is to slow down the helical shaft bending in the cabinet,check the deviation within the rules.In desperation,the collapse of the motor,the motor is in good condition,core without friction marks,check the collector ring and brush.Resistance box (resistance box for wound rotor concatenated variable resistance) are in good condition.Disconnect the wound rotor of variable resistance,electric test,squeaking wholesalemotor.blogspot.com noise elimination.Prove that the motor is on the rise,the variable resistance of the rotor circuit concatenated resection,relay is measured with table,found that dc delay relay (T3-11/1-110 - v) normally closed contacts ILSJ (circuit as shown in figure 1) death.If it can't disconnect in time,as the grab rose control variable resistance of ac contactor coil 1 JSC,3 JSC,SJSC suction,the main contactor 1 JSC,2 JSC,JSC all closed,wound rotor concatenated variable resistance of all the work.Replace the dc timing relay,fault be ruled out.