SOP for Diesel Generator | DG Operating System

To ensure the safe and efficient operation of a diesel generator (DG), it is important to establish and follow Standard Operating Procedures (SOPs). Which should cover key aspects like startup, shutdown, maintenance and troubleshooting.


Checkpoints before Check engine oil Check radiator water 

Check the diesel oil level in the fuel tank.

Check belt tension of the drive.

Check battery condition.

It is essential to wear earmuffs for the operators & helpers.

Never work barefooted, always wear safety shoes while working.

SOP for Diesel Generator


Insert the ignition key in the ignition switch.

Turn the key to the right & keep it in that position till the engine starts.

Release the key.

Switch on the MCB in the DG room and the changeover in the main panel room.

Check the color of smoke from a chimney. It should not be very dark.

Check out all possible leakage & attend to it.

Maintain a logbook for the operation of the DG set. (F-S020-14)DG operation and maintenance

Stopping the DG

Cut off the changeover in the panel room.

Switch off the MCB in the DG room.

Run the engine idle for 3 minutes & then switch off the ignition key.

Important Note:

Minimum oil pressure should be 5.0 kg/cm2.

The maximum current to be drawn is 90 Amps.

Water Temperature should be always in the green band on Temperature Gauge.

Voltage should be 410 ± 20 Volts.

The frequency should be 50 ± 3 Hz.

Do not remove any guards from the moving parts while the DG is running.

Do not wear loose clothes.

Keep adequate distance from moving parts.

Whenever AC’s are taken up by service engineer, ensure that during charging of Freon

Gas, there should not be any leakage in all tubing and fittings

Use applicable PPE’s while working in respective areas, in addition, wear earmuffs while working in the workshop.

Do not wear loose clothes and keep an adequate distance from moving parts


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