What are the pitfalls of buying diesel generator set?
2021-06-17
Eight pitfalls users should pay attention to when purchasing diesel generator set
1. Confuse the relationship between KVA and kW. Take KVA as kW, exaggerate power and sell it to customers. In fact, KVA is apparent power and kW is effective power. The relationship between them is ikva = 0.8kw. The power unit of imported units is generally expressed in KVA, while that of domestic electrical equipment is generally expressed in kW. Therefore, when calculating the power, the KVA should be converted into kW.
2. Don't talk about the relationship between long line (rated) power and backup power, just say a "power", and sell the backup power to customers as long line power. In fact, reserve power = 1.1 x long row power. Moreover, the backup power can only be used for one hour in 12 hour continuous operation.
3. In order to reduce the cost, the power of diesel engine is equal to that of generator. In fact, the industry generally stipulates that the power of diesel engine is greater than or equal to 10% of the power of generator because of mechanical loss. What's worse, there are those who mistakenly report the horsepower of the diesel engine to the users as kilowatts, and use the diesel engine less than the power of the generator to configure the unit, commonly known as "small horse pulling big car", so that the service life of the unit is reduced, the maintenance is frequent, and the usage fee is high.
4. The second mobile phone refurbished engine is sold to customers as a brand new engine, and some renovated diesel engines are equipped with brand new generators and control cabinets, so that ordinary non professional users can not tell whether it is a new engine or an old one.
5. Only diesel engine or generator brand, not origin, not unit brand. Such as Cummins, Volvo and Stanford. In fact, any diesel generator set can not be completed by one enterprise independently. Customers should fully understand the manufacturer and brand of diesel engine, generator and control cabinet of the unit, so as to comprehensively evaluate the grade of the unit.
6. The unit without protection function (commonly known as four protection) is sold to customers as the unit with complete protection function. What's more, we will sell the units with incomplete instruments and without air switch to customers. In fact, it is generally stipulated in the industry that units above 10kW must be equipped with full instruments (commonly known as five meters) and air switches; Large units and automatic units must have self-protection function.
7. Don't talk about the brand grade, control system configuration and after-sales service of diesel engine and generator, just talk about the price and delivery time. Some also use non power station special oil engines, such as marine diesel engines and vehicle diesel engines for generating sets. The quality (voltage and frequency) of electricity, the terminal product of the unit, cannot be guaranteed. Too low price units generally have problems, commonly known as: only buy wrong, not sell wrong!
8. Don't talk about the random accessories, such as muffler, oil tank, oil pipe, battery of what grade, battery of what capacity, several batteries and so on. In fact, these attachments are very important and must be specified in the contract. What's more, they don't even have a water tank fan, so customers can make their own open pools.
The diesel generator set is an important standby power supply equipment, so we need to be more careful when purchasing and use it easily.
1. Confuse the relationship between KVA and kW. Take KVA as kW, exaggerate power and sell it to customers. In fact, KVA is apparent power and kW is effective power. The relationship between them is ikva = 0.8kw. The power unit of imported units is generally expressed in KVA, while that of domestic electrical equipment is generally expressed in kW. Therefore, when calculating the power, the KVA should be converted into kW.
2. Don't talk about the relationship between long line (rated) power and backup power, just say a "power", and sell the backup power to customers as long line power. In fact, reserve power = 1.1 x long row power. Moreover, the backup power can only be used for one hour in 12 hour continuous operation.
3. In order to reduce the cost, the power of diesel engine is equal to that of generator. In fact, the industry generally stipulates that the power of diesel engine is greater than or equal to 10% of the power of generator because of mechanical loss. What's worse, there are those who mistakenly report the horsepower of the diesel engine to the users as kilowatts, and use the diesel engine less than the power of the generator to configure the unit, commonly known as "small horse pulling big car", so that the service life of the unit is reduced, the maintenance is frequent, and the usage fee is high.
4. The second mobile phone refurbished engine is sold to customers as a brand new engine, and some renovated diesel engines are equipped with brand new generators and control cabinets, so that ordinary non professional users can not tell whether it is a new engine or an old one.
5. Only diesel engine or generator brand, not origin, not unit brand. Such as Cummins, Volvo and Stanford. In fact, any diesel generator set can not be completed by one enterprise independently. Customers should fully understand the manufacturer and brand of diesel engine, generator and control cabinet of the unit, so as to comprehensively evaluate the grade of the unit.
6. The unit without protection function (commonly known as four protection) is sold to customers as the unit with complete protection function. What's more, we will sell the units with incomplete instruments and without air switch to customers. In fact, it is generally stipulated in the industry that units above 10kW must be equipped with full instruments (commonly known as five meters) and air switches; Large units and automatic units must have self-protection function.
7. Don't talk about the brand grade, control system configuration and after-sales service of diesel engine and generator, just talk about the price and delivery time. Some also use non power station special oil engines, such as marine diesel engines and vehicle diesel engines for generating sets. The quality (voltage and frequency) of electricity, the terminal product of the unit, cannot be guaranteed. Too low price units generally have problems, commonly known as: only buy wrong, not sell wrong!
8. Don't talk about the random accessories, such as muffler, oil tank, oil pipe, battery of what grade, battery of what capacity, several batteries and so on. In fact, these attachments are very important and must be specified in the contract. What's more, they don't even have a water tank fan, so customers can make their own open pools.
The diesel generator set is an important standby power supply equipment, so we need to be more careful when purchasing and use it easily.