In Jiangxi No.1 boiler plant, the vertical long shaft used did not come, and the motor power was i5kw. When the fault is system startup, sometimes it can be started, sometimes it can not be started.
Solution process: the pump on site is flexible in turning, the motor wiring is correct and the voltage is normal, but the water delivered by the pump contains a lot of sediment, which makes the friction between the sealing rings more serious. Later, I found an electrician to understand that the protection current on the switch cabinet of the steel plant was adjusted to a small value. In addition, due to the sediment, the starting current was large, which caused that the pump could be started sometimes and could not be started sometimes. It is suggested that the protection current be properly increased within the safe range, so that the pump can be started easily. Slurry pump