What is the cause of overheating of the generator set?

Diesel generator manufacturers to explain the cause of overheating and handling measures:

Three-phase load current 1, Chongqing diesel generator is not balanced, one phase winding overload overheating; if the three-phase current difference exceed 10% of the rated current, which belongs to the severe phase current imbalance, three-phase current imbalance will produce negative sequence magnetic field, thereby increasing the loss caused by the pole windings and ferrule components have a fever. Three phase load should be adjusted so as to keep the phase current as balanced as possible.

Chongqing diesel generator factory

2, Chongqing diesel generator without technology according to the premise of the rule operation, such as the stator voltage is too high, the iron loss increases; the load current is too large, the stator winding copper loss increases; the frequency is too low, so that the cooling fan speed is slow, the impact of generator heat; the power factor is too low, the rotor excitation current increases, the formation of the rotor have a fever. Check that the monitoring instrument instructions are normal. If not normal, to stop the necessary conditioning and disposal, so that the generator in accordance with the technical rules of the premise of operation.

3, the air duct was dust, infarction, poor ventilation, the formation of generators difficult to heat. Should the wind Su road dust, grease, make air smoothly.

4, the inlet air temperature is too high or the inlet temperature is too high, the cooler has infarction phenomenon. The air inlet or inlet temperature should be lowered to eliminate the obstruction in the cooler. The problem did not break before, should be limited to the generator load to reduce the temperature of the generator.

5, bearing wear. If the wear is not severe, the bearing sector is overheated; if the wear is severe, the stator and rotor may be rubbed against the stator and rotor to avoid overheating. Check whether the bearings are noisy or not. If the stator and rotor are found to be friction, they should stop, stop, test or change the bearings.

6, bearings plus smooth grease too much or too little, should be added to the rule of smooth grease, usually for the bearing room 1/2~1/3 (low speed upper limit, high speed lower limit), and not to exceed 70% of the bearing room is appropriate.

7, the stator core insulation damage, causing inter chip short-circuit, the formation of the iron core of the eddy current loss increased fever, severe stator winding damage. Stop inspection shall be stopped immediately.

8, the stator winding parallel wire broken, so that other wires of the current increases and fever. Stop inspection shall be stopped immediately.