Diesel Generator Tech

Why a generator fails to produce electricity? 1. The residual magnetism of the generator core is disappeared or too weak. The residual magnetism can be lost naturally when the genset is placed too long or it can also happen from running a generator with no load for too long. However, for the new genset , the residual magnetism can be lost due to a long distance transportation vibration. Thus, it will cause the remanence voltage of generator is disappeared or less than normal remanence voltage value, namely, the remanence line voltage is less than 10V, the remanence phase voltage is less than 6V. Because the stator of synchronous generator, rotor, as well as AC exciter stator, and rotor core are usually folded by adopting 1~1.5mm thick silicon steel sheet. After excitation vibration, the residual magnetism is easy to disappear or weaken. When the residual magnetism is lost, the generator will produce no power at start-up. 2. Excitation circuit wiring error The polar...