Inspection and Operation of Starlight AC Generator

Inspection of Starlight AC synchronous generator

a. Though the generator, AVR and auxiliary devices are solid and well insulated, if the generator was stored for longtime it might be moistened, and should be inspected carefully before operation.

b. Measure the insulating resistance, of winding against the ground by ohmmeter, if the value is less than 2 in cold condition, the generator should be dried. Caution: At measuring, the electronic elements and capacitor should be shorted, and the AVR. should be disconnected to avoid damaged.

c. Make sure all connecting joints are tight and contact good.

d. Be sure the frame is properly grounded, and ground wire should be same as the size of lead-wires。

e. Make familiar with the rated data of nameplate before operation.

2. Voltage adjustment

In general, the generator was carefully inspected and tested in operation before it left the factory, and the normal voltage has been corrected, so it is not necessary to adjust. If necessary, the setting potentiometer of voltage may be adjusted again. If the external potentiometer is used for remote control , it also can be adjusted to set the voltage.

3. AVR. Wiring

The wiring diagram of Sx440 and APR125-5 are shown as Fig .1 Fig .2. The end 3 and 4 of AVR are also connected to the 190V-240V, but there is a plug wire that should be put in the "50Hz" or "60Hz" position.

Operation

After inspection and adjustment have been made, and no trouble is found , the generator can run normally and generate the electricity. In order to keep generator run well, please remember following notices;

a. The generator output must be disconnected from the load , then start the prime mover.

b. Check the speed and adjust to the rated RPM, the voltage of generator w… get to normal value, then close the main circuit breaker to the load. The genset speed may be changed under load , and frequency may be tower than the normal frequency , check and adjust the speed as necessary.

c. Before shut down the genset, remove load and turn off the main circuit breaker. This is especially important, or the loss of residue magnetism can result.

d. If starting up the generator for first time or the generator stored for longtime, generator may be loss of the residue magnetism, and voltage can not built up,should charge to F+ and F- with DC 12V voltage , the "+" touch to F, and the" -" touch to F- for 15-20 seconds. Caution: the generator must be stud still during charging the magnetism, or AVR may be damaged.

e. Three phase AC generator should be operated at balanced load. Should pay more attention to the load and the balance of current to prevent the generator loaded on the single phase or serious unbalancing condition, or the AVR. and generator can be damaged.

The following image shows Starlight generator manufacturing workshop.