1. Select based on the power rating of the electrical equipment. If the power rating of the electrical equipment is 500KW, opting for a 500KW generator is not advisable, as an additional starting current is required during the equipment's startup. When starting up, electrical equipment must overcome inertia to perform work. This usually results in a starting current that is 2-7 times the actual current. The multiplier for the starting current varies for different types of electrical equipment. A 300KW generator produces a current of 600A, but a 300KW motor requires over a thousand amps, so it is evident that one should choose a generator with a slightly higher power rating.
2. Clearly define the performance of the generator rental equipment. After determining the generator's power, it's essential to specify its performance as well. The quality of the diesel engine determines the level of the generator's performance. Diesel engines, with their strong power, ease of maintenance, and low failure rate, have become the primary power source for generators. When selecting generator rental equipment, opting for imported diesel engines, though more expensive, offers lower fuel consumption and greater stability, effectively ensuring work efficiency.
3. Cumulative operating hours of the generators. Unlike other equipment, some generators serve as backup power sources and may not be operated for a long time. Others are used as primary power sources, operating continuously for 24 hours. The service life of diesel generators is generally longer, often up to 5 years. However, new machines have advantages over older ones in terms of failure rate, fuel consumption, noise, exhaust emissions, and fatigue resistance. Therefore, it is advisable to choose machines with fewer cumulative operating hours.