For diesel generators are not necessary equipment for factory producing，so lots of factories have no idea about the advantages and disadvantages of them. On a occasion,if you buy a bad quality generator which not only can not generate electricity and even bring potential safety hazards.
How to identify a good quality generator？Senior experts of the diesel generator set from supermaly give you some tips:
The general diesel generator set is mainly composed of four parts: diesel engine, generator, control system, and accessories.
The diesel engine is the power output part of the entire unit, accounting for 70% of the cost of diesel generators.Some bad manufacturers most like to play tricks at the diesel engine part.
Counterfeit diesel engine
At present, almost all well-known diesel engines in the market have imitation manufacturers. Some manufacturers use these imitation machines with the same appearance to pretend to be famous brands. They use fake name plates,but punch a real serial numbers of well-known diesel engines , print fake factory information and other means to set the brand. . It is difficult for non-professionals to distinguish the counterfeit diesel engine
Existing of refurbished old machines in all well-known brand, which is very hard to distinguish for non-professionals
However, there are some flaws in the refurbished machine, such as the paint of machine appearance, which is very hard to do the same look painting with the original factory especially dead corner..
Similar name to well-known brand engine,try to fool you
Diesel engine who has the Similar name to well-known brand engine,expect people can not distinguish them
Some generator manufacturers use similar name to well-known brand company as their name,such as XX cummins generator set company just putting another word before cummins but relate nothing to real cummins engine, just play the trick on the name. But to buyer claiming their generator set as cummins generator set
Use small power engine
Deliberately make a confusion about the relationship between KVA and KW. Use KVA as KW to exaggerate the power and sell it to customers.n fact, KVA is commonly used abroad, and KW is the effective power commonly used in China.The relationship between them is 1KW = 1.25KVA. Imported units generally use KVA to indicate power units, while domestic electrical equipment is generally expressed in KW, so when calculating power, KVA should be converted into KW by 20%.
Not to mention the relationship between common (rated) power and standby power, only one "power", the standby power is sold as common power to customers. In fact, standby power = 1.1x common (rated) power. Moreover, the standby power can only be used for 1 hour in 12 hours of continuous
(2) The generator
The role of the generator is to convert the power of the diesel engine into electrical energy, which is directly related to the quality and stability of the output power
The stator coil originally used all copper wire, but with the improvement of wire manufacturing technology, copper clad aluminum core wire appeared. Different from copper-plated aluminum wire, copper-clad aluminum core wire is a copper-clad aluminum when a special mold is used to form the wire. The use of copper-clad aluminum core wire for the stator coil of the generator is not much different in performance, but the service life is much shorter than that of the full copper wire stator coil.
Generator excitation methods are divided into phase compound excitation type and brushless self excitation type. Brushless self-excitation type has become the mainstream with the advantages of stable excitation and simple maintenance, but some manufacturers still configure phase-excitation type generators in generator sets below 300KW for cost reasons. ,
(3)The control system
Ordinary standard type units need to be manually connect to the load, and it usually takes 10 to 30 minutes from power failure to the start of power transmission from the diesel generator set.
The automatic control of diesel generator set is divided into semi-automatic and fully automatic unattended type. Semi-automatically starts the generator set automatically when the power is cut off, and automatically stops when public electricity is on, which saves the time for starting and stopping, but still requires manual switch. The automatic unattended control screen is equipped with an ATS dual power switch to directly detect the mains signal and switch automatically. At the same time, it controls the automatic start and stop of the generator set, and realizes fully automatic unattended operation, with a switching time of 3-7 seconds which is also adjustable .
Hospitals, military troop, fire control and other places that electricity need to be delivered in time must be equipped with fully automatic control screens.
The standard accessory parts of the regular diesel generator set consist of battery, battery wire, muffler, shock absorber, air filter, diesel filter, oil filter, bellows, connecting flange, oil pipe. Some manufacturers may also use bad accessories in theseparts
Shandong supermaly generating equipment co.,ltd as a OEM plants of cummins, Perkins, Deutz, Doosan, MAN, MTU, Weichai, Shangchai, Yuchai generator sets and other major brand.
Cummins generators produced by us with high reliability ,easy maintenance, long running time and long working time are being imported most countries in the world and are favored by customers. Say goodbye to refurbished machines or second-hand machines .Shandong supermaly generating equipment co.,ltd can be trusted.