Natural gas generator sets, with high noise and black smoke, can only be used on agricultural machinery. With the development of technology, well-designed natural gas generator sets have a much more pleasant sound. Due to their different structural characteristics from gasoline engines, they can be used to determine where the problem lies through some distinctive sounds. 1、 No voltage output after starting

 

1. Check if the circuit is connected incorrectly, especially the excitation and power lines. If not, magnetize/replace AVR, measure if the phase voltage is greater than 5VAC. If not, if the generator loses excitation or the residual magnetism is too low, magnetize it

 

2. A natural gas generator set experiences abnormal noise once every two revolutions, usually due to faulty parts related to the camshaft, such as damaged valves, push rods, valve springs, and timing gears.

 

2、 High voltage

 

1. Is the voltage adjustable

 

Checking whether the input voltage of the detection is normal is usually caused by the wrong connection of the detection wire, and if not, the AVR fails..

 

2. Check speed

 

If the speed is normal, AVR failure, excitation short circuit, diode fault, main rotor open circuit, and the speed is too low, adjust the speed to normal.

 

3. The natural gas generator set emits irregular intermittent sounds, usually due to malfunctions in engine accessories such as the generator, starter, air compressor, water pump, etc., which are not securely installed or cause internal scratches and sounds.

3、 Voltage too high

 

1. Is the voltage adjustable.

 

300KW375KVA natural gas generator 350KW438KVA natural gas generator

 

Check the detection input circuit of AVR, AVR failure

 

4、 Voltage instability

 

1. Adjusting the stability potentiometer

 

Check if the rotational speed is also unstable/check if the rotational speed is too low or AVR fails

 

5、 Large voltage oscillation

 

1. Check if various protections are working

 

Adjust the corresponding protection potentiometer, overexcitation voltage protection, and overexcitation current protection

 

2. A natural gas generator set emits sound continuously and regularly, usually due to faulty rotating components. If there is a continuous knocking sound, it often occurs in the timing gear, flywheel, and other parts.

 

3. A natural gas generator set makes a strange noise once it rotates, usually due to faults in parts related to the crankshaft, such as pistons, piston pins, piston rings, and connecting rod bearings.