Why is the Perkins diesel generator not producing electricity

When you use the generator, you are most afraid that the generator will not generate electricity. Especially when the generator power is needed to maintain important work, such as when the hospital needs the generator to transmit electricity, then the generator does not generate electricity. What are the reasons for this?

What's the reason the generator isn't producing

1, the remanence of the generator core disappears or is too weak

When the newly installed unit is subjected to the long-distance transport vibration or the generator is placed for too long, the remanence of the generator core disappears or the remanence sensation is weak, resulting in the generator remanence voltage disappearing or less than the normal remanence voltage value, that is, the remanence voltage is less than 10V and the remanence phase voltage is less than 6V. Due to the synchronous generator stator, rotor and AC exciter stator, rotor core is usually made of 1 ~ 1.5mm thick silicon steel sheet punching into excitation after vibration, remanence is easy to disappear or weaken, directly leading to the normal operation can not produce current resulting in no power generation.

2, excitation circuit wiring error

During the maintenance of the generator set, the polarity of the excitation winding is accidentally reversed. After power-on, the magnetic field generated by the current of the excitation winding cancels out in the opposite direction of the remanence, resulting in the disappearance of remanence.

In addition, during the maintenance, when measuring the DC resistance of the excitation winding or testing the DC current of the automatic voltage regulator AVR on the excitation winding, the polarity is not paid attention to, which will also cause the disappearance of the remanence of the iron core. This kind of situation is caused by the error of operation when the output factory, you can directly contact the manufacturer for maintenance.

3. The excitation circuit is blocked

Generator excitation loop electrical contact is bad or each electrical component connector loose, lead break, resulting in circuit interruption, generator excitation winding no excitation current.

Generator non-generating maintenance method

When the remanence of the generator core disappears, it should be magnetized. The magnetization method is as follows: for self-excited generators, external accumulator or dry battery is usually used, and the positive and negative wires of the generator are connected to the leading end of the excitation winding for a short time. However, the polarity of the DC power supply and the excitation winding must be recognized, that is, the positive pole of the DC power supply is connected to the positive pole of the excitation winding, and the negative pole of the DC power supply is connected to the negative pole of the excitation winding. If the diesel generator control panel has a magnetizing circuit, the toggle switch should be turned to the "magnetizing" position, you can magnetize the AC exciter.

Jiangsu Meao Power Technology Co., Ltd. is an important manufacturer of diesel generators. The company mainly manufactures and sells diesel generator sets with power of 3-3000kW, mobile power station of 24-600kW, Marine emergency diesel generator set of 24-800kW, gas generator set, heavy oil generator set and all kinds of imported series, special series (trailer, static speaker, mobile lighthouse, container, etc.) diesel generator At the same time, we are engaged in generator set maintenance and after-sale service of generator set accessories.