Maintenance is quite important for reducing and avoiding failure when motors are running, Thereinto, the most important link is patrol inspection and clearing the roots caused by any abnormal phenomenon. That is absolutely necessary to analyse the accident and adopt countermeasure for reducing accidents and raising efficiency when repairing resting table. Althouth the maintenance is very important, there are still many emergencies, such as short-circuit, overloading and lossing of phase. In those situations, it is necessary to adopt some safeguards against damage when motors running.

1.     Keep the motors clean. Prevent the entry of bead, greasy dirt and dust into motors inside, and dust out at fixed term.

2.     Notice that overload current does not exceed rated value.

3.     Notice to inspect for bearing heating and leakage of oil, especially apply lubricant according to the rules.

4.     Temperature rise does not exceed rated value.