Analysis of Cummins diesel generator set working with instability

1. The actual output power of the generator during operation shall be subject to the power meter or the ammeter?
Answer: The ammeter prevails, and the power meter is for reference only. Current = power ×1.8

2. The frequency and voltage of a generator set are unstable. The problem lies in diesel engine or generator?
Answer: Diesel engine.

3. The frequency of a generator set is stable and the voltage is unstable. The problem lies in diesel engine or generator?
Answer: It’s the generator.

4. The voltage and frequency of a generator set with load are stable, but the current is unstable. What is the problem?
A: The problem is that the customer’s load is unstable.

5. The frequency of a generator set is unstable. What is the main problem?
Answer: The main problem is that the speed of the generator is not stable, that is, the user’s load is not stable.

6, generator loss of magnetism is how to deal with?
Answer: The generator is not used for a long time, resulting in the loss of the residual magnetic field contained in the iron core before leaving the factory, the excitation coil can not establish the due magnetic field, then the generator runs normally but can not produce electricity. This kind of phenomenon new machine, or long – term use of the unit is more, the treatment method has

(1) Press the excitation button if there is an excitation button;

(2) If there is no excitation button, magnetize it with battery;

(3) With a light bulb load, overspeed for a few seconds.

7. After a period of time, the generator set is found to be normal but the power is decreased. What is the main reason?
Answer: (1) the air filter is too dirty, the air is not enough, then we must clean or replace the air filter;
(2) The fuel filter device is too dirty, the injection amount is not enough, it must be cleaned or replaced;
(3) the ignition time is not correct, must be adjusted.

8. In the use of diesel generator sets, what are the most important and must be paid attention to?
Answer: (1) The water in the tank must be sufficient and kept in the allowable temperature range;
(2) lubricating oil must be in place, but not excessive, and keep working within the allowable pressure range;
(3) The frequency is stable at about 50HZ and the voltage is stable at about 400V;
(4) The three-phase current is within the rated range.

9. Which parts and components do diesel generator sets need to be cleaned or replaced regularly?
Answer: diesel filter, air filter and oil filter (individual units and water filter).