The table below demonstrates the differences in the load capacity for gensets based on the type of engine starter. Soft Start- Controls motor’s voltage supply during start – up phase.Direct On Line (D.O.L)- High Startup current (A).
Star Delta (S.D) - Smooth start up, medium – to – high current. The three most common engine starters used in diesel gensets are: The key components of any genset to consider when sizing for high initial startup loads are: The startup load of any genset can be two or three times higher than the ongoing load. Understanding the difference between initial startup load and ongoing load requirements Have an electrician balance the load across all phases for single phase loads. Warm up the generator before applying the load – Approximately 5 – 10 minutes is a sufficient warm up time. Size the generator for your equipment to run between 60 – 80% load capacity of the diesel generator. General Rule of Thumb when sizing a diesel generator If the generator is too large for the load, then it will cause the engine to glaze over, and carbon build up. If the generator is too small for the load, then it will cause voltage fluctuations and permanent damage to the equipment. It’s critical to correctly size your genset. It can be difficult to determine what size genset you need for certain pieces of equipment, and we have heard of many customer experiences where they have purchased a genset only to find out later that they haven’t taken into consideration the high initial startup load and low ongoing load compared to the startup load. Many people think that they can purchase a generator based on the calculation just by adding the kVA, KW or ampere, but this is not the case. 
Things become tricky when you need to size a diesel genset for pieces of equipment that require high initial startup loads – a common requirement of equipment that produce high amounts of pressure like water pumps. However, this is a common misconception for calculating the load requirements for all pieces of equipment. It’s easy to calculate the power output required for general household appliances with a simple addition of kVA, ampere or KW. Sizing a diesel generator for the job can be a difficult task and isn’t just dependent upon the job at hand.
0 kommentar(er)
