Q:can DG's be used as a backup for single phase and three phase ac?

Yes but they need to match the power source they are replacing.

Q:I am buying a portable generator in order to power up to six, 500 watt halogen work lights to light up my horse arena at night. what are some things I should consider in terms of features that are needed in this application. Also, I don't want alot of bells and whistles, I need to keep as low cost as possible but still safe and quiet.

Living on the coast and surviving hurricane Ike I did learn a thing or two about generators. The cheap ones are just that. Cheap. If you want one that will last a while go with a name you recognize like Coleman or Honda. (both great, but Honda is the king) And only buy one with just the power that you need. For some reason, a big generator- say 6000 watts will go through twice as much gas as two 3000 watt generators! No idea why. Look it up if ya want. Totally true. So you are talking about 3000 watts that you need. If all you are using is lights you wont need to worry about start-up surge. You know how they say it's a 3000 watt gen with like 3250 peak? That is because if you are running a motor like a fridge or air conditioner they will need extra oomph to get the ball rolling. Those appliances will surge higher than the amount of watts they need just to run, then they come back down. Lights don't so much do this. I know, it's confusing. Just get a good 3000 watter or just a little more in case they exaggerate a bit about the output. It happens. But probably not with a good one. P.S. I have studied long and hard to find the best way to reduce the noise. If the volume is a concern, the most effective and cheapest thing you can do is to just dig a hole 2ft deep and put the generator in it. Or in your case you could put hay bales around it, or both. OH! And you can get one that requires a gas /oil mix which is a pain in the butt, but they don't require adding oil. If you go with a gas one you must watch your oil level or risk burning up the engine. I went with gas/oil mix because if I'm using a generator I am in a crisis and might forget to check the oil.

Q:hi,Thanks for your help in advance,Need more information on recent trends in applications of DC shunt generator. Kindly help.thank you

Well you already said it was a DC generator. By nature all generators generate their output voltage in cycles as they rotate, or even as they go back and forth for a linear generator. Therefore they generate AC, but the commutator converts this to DC. The commutator is a rotary switch that reverses the connection at the correct part of the rotation so that the current always flows one direction. That is DC, direct current instead of AC, alternating current. Sometimes AC generators may be called an Alternator. A shunt generator simply means it is self excited, that is the field magnet is connected across the generator's output, rather than having a separate DC generator for the field.

Q:i want to buy a generator for our company i want to know how to calculate current for 1000kva capacity generator. and also want to know control and protection are required for the same generator please explain.

OK - You have elaborated - At that voltage you will have about 2400 Amperes. I P/E You have a generator putting out about 1 million watts. Divide that by the voltage and you get the usable amperes at rated voltage. Drop that to 380 3 phase Y would transformer. With loss through this you will have about 2352 amps. But the voltage has dropped from 415 to 380 so the amperes will go up. You will have about 2500 amps available at the output side of the transformer. Remember this is TOTAL amperes across all 3 legs of the windings. Remember that The Power is ALWAYS equal to the VOltage X the Amperage. If one goes up the other goes down. That will NOT change. Transformers are 98% efficient so you must calculate the initial loss through the primary transformet before you calculate the oiwer available for your main buss. If you have 1000 KVA before the transformer you will have 980 KVA at the out side. At 380 V, 3 phase you will have 2578 Amps. 980,000VA/380V 2578.94A OK So far? For safety you have to derate the system by 20% to prevent overload and burnout of the Generator or transformer. you have 2000 amps at 380 volts. That is on your main buss in the master control panel. You have a master breaker there feeling smaller buss lines. On each of these is one breaker per machine OR you can take sub feeder lines to sub panels throughout the factory. From these sub panels you can distribute 3 phase for motors and secondary panels for 110 or 200 single phase for lighting and hand tools. This is so complex and I want to tell you so much. How about I go there and do it.

Q:I want to be able to plug my APC Smart-UPS RT 8000VA 208V into a diesel generator when our power will be down for an extended period of time. The max OUTPUT of the APC unit is 6400w. Does that mean I need at least a 6400w Generator?

If the unit is rated 8000 VA, and the output is 6400 W. that hints that the through-put efficiency is about 80%. You need a generator that will supply at least 125% of the load you apply to the UPS.

Q:A diesel-powered generator with a cost of $145,000 and estimated residual value of $7,000 is expected to have a useful operating life of 75,000 hours. During July, the generator was operated 150 hours. Determine the depreciation for the month.

145,000 - 7000 132,000 / 75000 1.76 per hour July 150 hours x 1.76 per hour rate $264 Keep in mind I rounded the $1.76 but if you follow this procedure it will get you where you want to be. I hope this helps and wish you all the best. good luck

Q:I recently purchased a book on how to make a hydrogen generator that mentions either gas or diesel. However common sense tells me that a diesel engine requires some sort of lubrication such as cooking oil etc. I have tried to send a email but cannot get an answer. Does anyone out there know if hydrogen will work in a diesel engine without burning the valves out quickly.

The engine could could be thoroughly redesigned. Diesel engines paintings as a results of fact whilst compressed, gasses warmth up. whilst they warmth up sufficient they explode. With the engines of today, the hydrogen could explode way too early and not produce any smart skill. Hydrogen could be run through a gas engine although- much less exchange ought to be achieved. BTW, the place will this hydrogen be coming from? maximum hydrogen today comes from organic gasoline, which could be utilized in diesel engines.

Q:I have noticed that our kilowatthour meter reads backwards when I use some electrical appliances, please explain why. plgperera.

are you sure u dont have a diesel generator that sells el. energy back to the grid? jk Is this first time you look at the meter? If so take a look again, should be ok.

Q:How many gallons of diesel would br required to run this generator for 24 hours??

assuming the generator is frictionless and converts all the energy of the burning fuel into electricity, you could find the answer by converting the fuel and amps into juels. I think.

Q:What is the difference between a diesel generator and a super silent generator?

it is the introduction of foreign advanced technology of low noise power generating units and new products development,