PLATE-WEAR 5020486 - Caterpillar

normal operation, monitor the power factor and monitor generator loading.When a generator is installed or when a generator is reconnected, ensure that the total current in any one phase does not exceed the nameplate rating. Each phase should carry the same load, which allows the generator to work at the rated capacity. If one-phase current exceeds the nameplate amperage, an electrical imbalance will occur. An electrical imbalance can result in an electrical overload and an electrical imbalance can result in overheating.The power factor can be referred to as the efficiency of the load, which can be expressed as the ratio of kVA to actual kW. The power factor can be calculated by dividing kW by kVA. Power factor is expressed as a decimal. Power factor is used to mean the portion of current that is supplied to a system that is doing useful work. The portion of the current that is not doing useful work is absorbed in maintaining the magnetic field in motors. This current (reactive load) can be maintained without engine power.Generator sets normally have a low idle setting that is higher than industrial engines. Low idle will be approximately 66 percent of the full speed that is achieved by 60 Hz units. This would be equal to 80 percent of the full speed that is achieved by 50 Hz units.Note: Operating the generator set at low idle speed for an extended time will cause some voltage regulators to shut off. The generator set must be shutdown completely and the generator set must be restarted. Restarting the generator set will allow the voltage regulator to produce an output again.