AC alternator is an important part in diesel generator, if it has faults, whole diesel generator can not work. Some customers asked question about this last time, so Starlight Power will answer details about the common faults of AC alternator, hope this article is helpful to everyone. A.There is abnormal voltage between alternator neutral line and ground. 1.Under normal condition, due to the influence of high-order harmonics or manufacturing process, the air gap under each magnetic pole is uneven and the magnetic potential is unequal. If the voltage is between one and several volts, there will be no danger and it is not necessary to deal with it. 2.The alternator winding has short circuit or poor insulation to the ground, which leads to the deterioration of electrical equipment and alternator performance and easy to heat up. Therefore, timely maintenance should be carried out to avoid the expansion of the accident. 3.There is no voltage between neutral line and ground unde...