The purchase of generator is first to see what brand, manufacturing process, test machine to see steady voltage instability, voltage fast, frequency stability, vibration small, size and color of engine exhaust gas, exhaust gas and big, there is no other noise.
In addition, the purchase also should pay attention to the following eight traps:
The relationship between 1, KVA and KW of confusion. KVA as KW exaggerated power, sold to customers. In fact KVA is apparent power, KW is the effective power, the relationship between them is IKVA=0.8KW. Imported units generally use KVA to indicate power units, and domestic electricity equipment generally use KW, so accounting power should be KVA hit 20 percent off converted to KW.
2, not long (rated) power and standby power, said only a "power", the reserve power as a long power sold to customers. In fact, long standby power =1.1x power. Moreover, the backup power can only be used in 12 hours continuous operation for 1 hours.
Power allocation into 3, diesel power generator and the same, in order to reduce costs. In fact, the general provisions of the power of the diesel generator power more than 10%, because of the mechanical loss. Even worse, there's the diesel engine horsepower as kW false alarm to the user, the diesel engine and the generator power to use less than the configuration unit, commonly known as: small horse cart, and the unit life reduced, frequent maintenance, the use of high fees.
4, two mobile phone refurbished machines as a new machine sold to customers, there will be a diesel engine with refurbished new generator and control cabinet, the general non professional users can not tell whether new or old machine machine.
, 5 only to the diesel engine or generator brand, do not report the origin, not reporting unit brand. In fact, any diesel generator can not be completed by an independent enterprise. Customers should fully understand the diesel engine, generator, control cabinet manufacturers and brands, in order to comprehensively assess the grade of the unit.
6, with no protection function (commonly known as the four protection unit) as the protection of functional units sold to customers. What is more, the instrument incomplete, without air switch unit to sell to customers. In fact, the industry generally requires more than 10KW of the unit must be full meter (commonly known as the five table) and air switches; large units and automation units must be equipped with a protection function from four.
7, on diesel engine and generator brand quality, control system configuration, not to talk about customer service service, just talk about the price and delivery time. Some will also be non power station dedicated oil machine, such as: marine diesel engines, diesel engines used for generating sets. The quality of the terminal products - electrical quality (voltage and frequency) cannot be guaranteed. Too low price units generally have problems, commonly known as: only to buy the wrong did not sell wrong!
8, don't talk about random accessories, such as with a silencer, oil tank, oil pipe, with what level of battery, large capacity battery, battery etc.. In fact, these attachments are very important and must be stated in the contract. What is more even the water tank fan are not brought, so that customers from open pool.