Purchasing a diesel generator set is a science, and you must first be familiar with the eight common traps in purchasing.

1. Eight common traps in procurement:

1. Confusing the relationship between KVA and KW. Treat KVA as KW to exaggerate the power and sell it to customers. In fact, KVA is the apparent power and KW is the effective power. The relationship between them is IKVA=0.8KW. Imported units generally use KVA to express the power unit, while domestic electrical equipment is generally expressed in KW, so when calculating power, KVA should be converted into KW at a 20% discount.

2. We do not talk about the relationship between long-line (rated) power and backup power. We only talk about "power" and sell the backup power to customers as long-line power. In fact, reserve power = 1.1x long row power. Moreover, the backup power can only be used for 1 hour out of 12 hours of continuous operation.

3. The power of the diesel engine and the power of the generator are configured to be the same in order to reduce costs. In fact, the industry generally stipulates that diesel engine power ≥ 10% of generator power because of mechanical losses. Even worse, some misreport the diesel engine horsepower to the user as kilowatts, and configure the unit with a diesel engine smaller than the power of the generator, commonly known as: a small horse-drawn cart. As a result, the life of the unit is reduced, maintenance is frequent, and the usage cost is high. Too high.

4. Second-hand refurbished mobile phones are sold to customers as brand-new machines, and some refurbished diesel engines are equipped with brand-new generators and control cabinets, making it difficult for ordinary non-professional users to tell what is. New machine or old machine.

5. Only report the brand of the diesel engine or generator, not the place of origin, nor the brand of the unit. Such as Cummins of the United States, Volvo of Sweden, and Stanford of the United Kingdom. In fact, no diesel generator set can be completed independently by one company. Customers should fully understand the manufacturer and brand of the unit's diesel engine, generator, and control cabinet in order to comprehensively evaluate the grade of the unit.

6. Sell the units without protection functions (commonly known as four protections) to customers as units with complete protection functions. What's more, units with incomplete instruments and no air switch are sold to customers. In fact, the industry generally stipulates that units above 10KW must be equipped with full instruments (commonly known as five meters) and air switches; large units and automated units must be equipped with self-protection functions.

7. Don’t talk about the brand, grade, control system configuration of the diesel engine and generator, or after-sales service. Just talk about price and delivery time. Some also use non-power station-specific oil engines, such as marine diesel engines and vehicle diesel engines, in generator sets. As a result, the quality of electricity (voltage and frequency), the end product of the unit, cannot be guaranteed. Units that are priced too low generally have problems. Commonly known as: you only bought the wrong unit, not the wrong one!

8. Not to mention the random accessories, such as whether it has a muffler, a fuel tank, a fuel pipe, what grade of battery, what capacity battery, how many batteries, etc. In fact, these attachments are so important that they must be stated in the contract. What's more, they don't even come with a water tank fan, allowing customers to create their own open pools.

2. Purchase of units

1. When purchasing a diesel generator set, the comprehensive performance and economic indicators of the diesel generator set, the supplier’s professionalism, geographical location and actual conditions should be fully considered. Professionalism, whether the supplier has after-sales service means, such as repair vehicles, special machinery, etc.

2. Then consider whether the power of the selected unit matches the power of the electrical load. Generally, it is better to select the power of the unit based on: unit rated power x0.8 = power of electrical equipment. If there are large and medium-sized motors, 2-5 times the starting current needs to be considered. If the unit is mainly used to charge the UPS, a professional consultation must be conducted based on the actual situation of the UPS before determining the rated power of the generator.

The generator market is a mixed bag, and irregular family workshops are rampant. Therefore, when purchasing a generator set, you must consult a professional OEM manufacturer, including product configuration and price, after-sales service items, etc. Refurbished or second-hand generators are not allowed. .