Preferred system earthing for the motors fed from medium voltage bus

[krisys]

We are planning to convert the 3.3kV system from solidly earthed neutral to low resistance earthed system. This 3.3kV bus is mainly feeding the 3.3kV motors and few 3.3kV/433V transformers. As I understand, this would reduce the earth fault current in the faulty motor windings thus reducing the extent of damage to the motor. Anybody has a good technical article or publication to throw some more light on this. I would appreciate if you could share it.

 

[7anoter4]

See[for instance]:

http://sites.ieee.org/baton-rouge/files/2012/05/presentationMay2012.pptx