The voltage change rate of diesel generator sets is about 20 to 40%. General industrial and household loads require that the voltage remains basically unchanged. For this reason, as the load current increases, the excitation current must be adjusted accordingly. Although the change trend of the adjustment characteristic is exactly opposite to that of the external characteristic, for inductive and purely resistive loads, it rises, while under capacitive loads, it generally falls.
(1) Preparation before starting the diesel generator set:
1. Check the lubricating oil level, coolant level, and fuel quantity;
2. Check the pipelines and joints of the diesel engine's oil supply, lubrication, cooling and other systems for oil and water leakage;
3. Check whether the electrical circuits have leakage hazards such as broken skin, whether the ground wire electrical circuits are loose, and whether the connection between the unit and the foundation is firm;
4. If the ambient temperature is below zero, a certain proportion of antifreeze must be added to the radiator;
5. When the diesel generator set is started for the first time or started again after being shut down for a long time, the air in the fuel system should be drained by hand pump first.
(2) Start:
1. After closing the safety in the control box, press the start button and press the button for 3 to 5 seconds. If the start is unsuccessful, wait for about 20 seconds to start again. If the startup fails several times, the starting operation should be stopped, and the fault factors such as battery voltage or oil circuit should be eliminated before starting again;
2. Observe the oil pressure when starting. If there is no display or the oil pressure is very low, stop the vehicle immediately for inspection.
(3) Run:
1. After the unit is started, check various parameters of the control box module; oil pressure, water temperature, voltage, frequency, etc.;
2. Under normal circumstances, the speed of the unit reaches the rated speed directly after starting; for units with idle speed requirements, the idle time is generally 3~5 minutes. The idle time should not be too long, otherwise the relevant components of the generator may be burned out;
3. Check the unit's oil lines, water lines and electrical appliances for leaks;
4. Check the tightening of each connection of the unit to see if there is any looseness or severe vibration;
5. Observe whether the various protection and monitoring devices of the unit are normal;
6. When the rotor reaches the rated speed and all parameters of no-load operation are stable, close the power supply;
7. Check and confirm whether the parameters of the control panel are within the allowed range, and check the vibration of the unit again to see if there are any leaks or other faults;
8. Overloading is strictly prohibited when the unit is running.
(4) Normal shutdown:
The gate must be opened before shutting down. Generally, it needs to run for 3~5 minutes to shut down after unloading.
(5) Emergency shutdown:
1. When an abnormality occurs in the operation of the diesel generator set, it must be stopped immediately;
2. In case of emergency stop, press the emergency stop button or quickly push the fuel injection pump stop control handle to the parking position.
(6) Maintenance matters:
1. The diesel engine filter element replacement time is 300H; the air filter element replacement time is every 400H; the oil filter element replacement time is 50H for the first time and 250H thereafter.
2. The first oil change time is 50H, and the normal oil change time thereafter is every 250H.
