Phenomena: a. The excitation current increases and the excitation voltage decreases. b. The stator current increases, the voltage decreases, and synchronization may be lost. c. The rate of force increases or advances. d. The vibration of the generator increases and there is smoke or a burning smell inside the generator. e. The carbon brush can catch fire violently.
Treatment: a. Reduce active load. b. If the two-point grounding protection action of the rotor causes the generator switch to trip, check whether the excitation switch has tripped. Otherwise, open it manually. c. If there is a short circuit between the layers of the rotor, the vibration increases or the excitation current increases sharply, and the two-point grounding protection of the rotor does not work, the load should be reduced immediately and the machine must be stopped. .
Applicant environmention
A ground fault at any point in the generator excitation circuit is one of the common forms of fault. An earth fault at any point in the excitation circuit does not cause any damage. the generator, but a second one occurs one after the other. Point grounding, that is, when the rotor is grounded at two points, a considerable fault current passes through the fault point and burns the rotor body, and increases the winding current field and can cause burns due to overheating; because part of the winding is short-circuited, the air gap flux. Loss of balance can cause vibrations and even magnetize the shaft and turbine. The consequences of a two-point earth fault are serious, therefore protection of the rotor mass. must be installed.
It depends on how you use it, because every time you run the generator or stop the generatorr, you must first turn off the power supply (i.e. the knife, and some have leaks (protectors). First make sure the generator is producing electricity or it has completely stopped. Wait for the generator to generate electricity, then press the power switch. Since some generators have been in use for a long time, it will be easy to fail to do this (as mentioned above. above, "Loss of magnetism") Then use a 12V battery to magnetize the generator Simply touch the positive and negative poles of the rotor slip ring (note here that if you touch them, there will be large sparks, which will result in big sparks). proves that the positive and negative poles are reversed Replace the positive and negative poles and touch them again If there is only a small spark, it proves that the magnetization is successful)!
< p>Generally speaking, the alternator is adjusted and used normally and does not short-c.not irfired or if overloaded it will not break. You can check the coil for signs of burning, send it to the maintenance office for repair. . If there is no sign of burning, it means it has lost magnetism. If the magnetization does not work, it means that the transistor in the generator case is broken. . Otherwise, send it to a professional to measure it for you! (It is also generally said that the generator always vibrates a little when running. (Unless your shockproof performance is good!) Check if any wires are broken. If not, send it to a professional to measure it for you so please connect them!