A generator acceptance testing procedure is the witnessed, documented sequence that proves a generating set meets the agreed specification twice: once at the manufacturer’s works
Generator performance class G1 G2 G3 G4 is the ISO 8528-5 system that grades how tightly a diesel generator set holds its voltage and frequency,
A generator loses roughly 1% of its output for every 100 m above 1,000 m and about 1% for every 10°C above 25°C, but that is only the
Generator frequency drops under load are a symptom, not a disease. A brief dip when a large load steps on is normal governor behavior; frequency
Generator cable overheating is not normal wear, and it’s usually not a generator fault either. The cable is telling you one of three things: it’s
Diesel generator black smoke under load means the engine is burning more fuel than the air entering it can burn cleanly. A puff that clears
Diesel generator low power factor is a load condition, not a machine fault: the motors and equipment on the site draw reactive power, so the
A diesel generator fails a load bank test for one of four reasons. The engine cannot deliver its rated power, the alternator cannot hold voltage
A generator room overheats for one of two reasons. Either the room can’t remove the heat the set produces, which is a ventilation problem, or
A diesel generator trips when a motor starts for one of three reasons. The motor’s starting current genuinely exceeds what the set can supply, which
When a motor starts, a diesel generator’s voltage drops 15-30% for a few seconds, and the deepest part of the dip lasts under two seconds.
A safe generator wet stacking load percentage is 50-80% of rated load. Never run a diesel generator below 30% of its rated load for extended
