Why not samoto diesel generator power
the contact between the exciter brush and commutator is bad or the brush holder pressure is not enough.
damage to the circuit or circuit breaker, short circuit or grounding
the magnetic pole of the generator loses its magnetism.
Diesel generator shutdown often lose remanence is used due to the exciter pole material close to steel, remanence, after stopping in the excitation winding is not current magnetic field disappeared
