Use and need of Neutral in 3 phase induction motor with neutral, connected with VFD are explained in the video tutorial. 3 phase AC induction motor or traction motor need neutral for fault monitoring purpose in big size system. This reduces the time required to find the fault and also some advance information of fault in some cases in 3 phase motor with neutral. If 3 phase motor has no neutral then fault monitoring is more difficult. Does a motor need neutral? Why neutral required in 3 phase ac motor? explained. If 3 phase motor connected with 3 phase AC supply from VFD has no neutral then fault monitoring is more difficult. Educational video tutorial on electricity & electrical engineering 304 by G K Agrawal (Gopal Krishna Agrawal). Youtube video.
The lecture is given by a person with industrial experience and useful for electrical, electronic communication and power electronics engineering students, project work and also Physics students.