Reasons for the low voltage of standby power supply for diesel generators and its treatment

Reasons for the low voltage of standby power supply for diesel generators and its treatment

Today's diesel generator manufacturers come to take everyone to know what the process of preheating and starting diesel generator sets is like.

First, warm up:

Before the unit is equipped with a preheater, the personnel can determine whether the diesel generator sets are to be warmed up according to the ambient temperature, and the control panel with the preheating button can control the engine startup heating to work in order to achieve the purpose of preheating.

Second, power up:

Turn the control panel key switch from OFF to ON. Observe that the instrument indicator light on the panel is on, indicating that the control panel is powered on. At the same time, the fuel of the diesel generator set is on. The controller with electronic speed controller or EFI unit is Also in working condition.

Third, start:

Some unit control screens have idle/full speed transfer switches. Users can choose whether to start idle or full speed one-time start according to actual needs. Usually idle running time should not exceed 5 minutes, the unit should not run for a long time at idle speed, press the start button, the duration of the rated time does not exceed 30 seconds, the engine starts to start under the start of the motor, once successfully started, you can release Start button, the unit goes into operation.

IV. Recommendation: In order to extend the service life of the starting battery and starting motor, it is advisable to control the starting time of the unit at 5-10 seconds. If the startup is unsuccessful, you can pause for a second time to start the program.

The reasons for the low standby power supply voltage analyzed by the generator manufacturer and its treatment methods:

1, the prime mover speed is too low. Treatment: Adjust prime mover speed to rated value.

2, the excitation loop resistance is too large. Treatment: Reduce the resistance of the magnetic field varistor to increase the magnetizing current. For semiconductor excitation generators, check whether the additional winding joints are broken or connected incorrectly.

3, the excitation brush is not in the neutral position, processing: or spring pressure is too small. Adjust the brush to the correct position, replace the brush, and adjust the spring pressure.

4. Some rectifier diodes are broken down. Remedy: Check and replace the breakdown diode.

5. There is a short circuit or ground fault in the stator winding or field winding. Processing: Check the fault and remove it.

6, brush contact surface is too small, lack of pressure, poor contact. Treatment: If the surface of the commutator is not light, use an emery cloth to grind the commutator surface or adjust the spring pressure at low speeds.

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