Buying a Generator – Considerations

FEATURES & BENEFITS TO LOOK FOR

Engine block. For long life and quiet operation we recommend four cycle, liquid cooled, industrial duty diesel engines.

Air or liquid cooling. Air-cooled engines require a tremendous amount of air and may require ducting and they are somewhat noisier. Liquid cooling offers quieter operation, more even temperature control and therefore longer engine life. Modern air cooled engines are suitable for many applications, especially short run,

Portable Or Standby Uses

Intake Air. All quality generators have intake air filters with replaceable filter elements. Today even small portables have replaceable air cleaners.
Mufflers. Most generator come equipped with an industrial grade muffler. One good investment is a residential or critical muffler that is much quieter and lasts longer. All enclosed generators should be equipped with at least a residential and preferably a critical muffler.
Lubrication. The lubrication system should have a full flow, spin-on oil filter. Larger generators should have a filter bypass. Most generators today have low oil alarms and shutdowns, make sure the generator you select has this valuable feature, its simply a must have protection
Major brand of engine. We do not know why people would even consider an inferior "scrap metal" unit or "off brand" engine, you will not be able to obtain the necessary parts, service and support. Many engines come with a box of spare parts including pistons, rings and bearings because your going to need them all. Save yourself some grief and buy a major brand of engine. If you buy a junk engine, we wont service it and most other reputable dealers won't either
Electrical system and circuit breakers. Standard 12 volt system should include at least the following: 1) Quality starter motor and battery. Larger generators should include a charging alternator with a solid state voltage regulator. 2) Larger diesel units should come with a pre-heat switch and all generators should have a start/stop switch. 3) Al generators should have a safety shutdown system to protect the engine in case of oil pressure loss, generator over-speed or over-crank and high water (or operating) temperature. 4) System circuit breaker to protect the generator. On small systems and portables there should be a circuit breaker on each circuit.

GENERATOR END

(The part that makes the generator "generate" electricity.)

AC generator should have a 4-pole revolving field. An automatic voltage regulator will provide “clean” power. Normal utility power is +/- 6% voltage regulation; most generators are even better ranging from +/- 5% or .25 % and even better. Most modern generators offer AVR – Automatic Voltage Regulation or some other proprietary brand of voltage regulation and can be safely used with modern electronics and computers.
Lifetime lubricated bearing. Cheap generators are not supplied with these bearings. They often require complete disassembly every two or three years for bearing replacement. Most modern power alternators, or generator ends, are provided with industrial quality lifetime lubricated bearings.

ENGINE ACCESSORIES AND CONTROLS

Upon determining the generator size you will need, make a list of optional and installation equipment you require. For noise abatement, we recommend a residential (not industrial grade) muffler. A good primary fuel filter/water separator is a must to protect your engine's fuel system. Stand-by sets may require a block heater to keep the coolant/water mix at an adequate temperature for easier starting and less smoking on startup.

WHAT SIZE SET WILL I NEED?

Sizing is the most important step; nothing is more critical in your choice of a generator. A set that is too small won't last, will smoke and can do damage to your electrical equipment. If it is too large, the engine will carbon up, wet stack or “slobber” and this means excess fuel consumption and early failure. We recommend that a generator set never run continuously with less than 40% load - 50% to 75% is optimum.
Additional factors, which may affect efficient operation of your generator, are high altitude and high air temperature. These conditions will lower generator output. You must take into account your elevation, normal and extremes of temperature and other factors. Ask your sales engineer for de-rating information. Allow three (3) percent loss in efficiency for each 1000 feet above sea level minimum. Check the manufactures specifications and use the de-rating factor they specify. Nothing is worse than buying a generator that is too small.

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Diesel Generator,Diesel Generator Set manufacturer and suppliers - Power World Machinery Equipment Co.,Ltd was founded in1998. It's a department specialized in diesel generators export business.