Motor burn out phase characteristics

Lack of electricity,a phase star connection will burn off two phase coil.Delta,meet will burn a coil.Lack of two phase electric,star connection will burn a coil.Delta,will burn off the two coils 1.The interphase short circuit.If found in three phase generator short circuit fault phenomena,fusing many wire,the nearby have a lot of molten copper scrap,and the other or the other end of coil group were no sear, Can be concluded that the winding burn was caused by phase fault.2.Lack of phase operation.Burn out motor winding due to lack of phase operation,and the damage characteristics of general is obvious.Open the cover of a motor,if you see the winding end a third or two-thirds of extremely Group of burn black or dark brown.wholesalemotor.blogspot.com And the rest of the two phase or a phase winding is in good condition,can be concluded that the winding burn was caused by lack of phase operation.3.The turn-to-turn short circuit.Because of turn-to-turn short circuit and burn out motor winding,the obvious features of the damage,if the end coil can clearly motor fan see that there are a few turns or burned in a volume group,a very very Electromagnetic wire was burned into bare copper wire,and the short circuit part outside of nature or other two phase coil is intact or burned a little,can be concluded that is turn asked short-circuit winding burn.