Q:Electrical Engeenearing

A diesel power plant is a stationary installation incorporating one or more diesel generator sets with controls and switchgear. Diesel plants are usually used as emergency backup systems for military installations, hospitals, and other vital installations that depend on reliable electric power. There are also diesel power plants that are the only power supply for remotely located installations and communities; for example, remote radar stations and island resort towns. In a diesel plant, there are one or more diesel generator sets, consisting of a diesel engine and a suitable generator. A typical arrangement would involve three generators of which any two can handle the peak load while the third can be held as a standby unit or dismantled for major maintenance at intervals. There will be a switchyard that contains the electrical contactors and safety devices for connecting the generators to the grid as needed, and there will be control panels for the individual generators, as well as synchronizing gear to keep the generators in phase. In many installations these controls are computerized and can be operated and monitored at a distance over the internet or other communications arrangement. Also, there will be arrangements for handling the fuel required by the engines. Often there is a large tank and separate day tanks for each engine. This type of arrangement helps ensure that the entire supply is not lost in case the fuel plumbing or day tank for one generator set springs a leak.

Q:Hello, what I'm really trying to understand is how do large generators that power prisons, hospitals and various government buildings work? I have a basic understanding of regular house generators and their working process. What I want to know is how such a generator can acquire power in a case of a complete electric blackout, is there a back up supply line? another power source? Surely to supply a large building such as a prison or a hospital one would need a large reserve of power. So the question is where does that power come from? Or are they completely autonomous? Also are these generators commonly used nowadays and what is the difference between them and the reserve power system if any. I would greatly appreciate any answers that could explain the above. Thanks.

You are asking about backup generators? They have a gasoline or diesel engine driving the generator.

Q:I have a generator in the building I am working on. It appears quite dated, but its stats are as follows: it’s a 415 Volt 3 Phase Diesel Generator.On the plate of the generator:415V3 Phase640KVA520KWPower Factor 0.8902 AmpsSo my question is:We are testing the generator to its full load, now my load is at power factor 1. Would I be correct in assuming that because my load is power factor 1 that the full load of my generator is 640kW not 520kW.Or is it that my actual power loading is rated at 520kW, but that load is allowed to be inductive or capacitive to 0.8.Because it says 900 amps on the plate I am therefore under the assumption that regardless of my load characteristics, as long as I do not exceed 900 amps there should be no problem. Or is it a case that my load can only be 520kW and the highest I can allow the phase to go out is up to 640kVA.Hope that makes sense, ill edit if not. Thanks for reading.

While your generator will handle the amperes as either KVA or KW, unfortunately, the KW rating is is the rating of your driver. You are driver limited, not generator limited.

Q:Why not samoto diesel generator power

the contact between the exciter brush and commutator is bad or the brush holder pressure is not enough.

Q:Example 1:A GP38-2 has a 2000 HP prime mover diesel engine.What are the horsepower ratings of the electric motors geared to the axle? [4 electric motors; 1 on each axle how much HP?]Example 2:An SD38-2 has a 2000 HP prime mover diesel engine.What are the horsepower ratings of the electric motors geared to the axle? [6 electric motors; 1 on each axle how much HP?]I know the tractive effort of the SD unit would be higher, but with 2 more motors on the axles, does it have more horsepower also?

you must look at the power distribution between 4 and 6 axles as a fraction. you must also realize that at WOT (all 2000 ponies [38-series]) for either an SD or GP, the altenator produces the SAME power output (600amps if i remember correctly?). you are dividing the power available by either 4 or 6. so, you can see here that the GP trac mtrs have more power avail to them. thus why an SD will lug down at low speed longer. takes a bit longer to burn those out because they dont have the power avail to them as a GP. the trac mtrs on GP and SD are the same per class. for interchangability and mass production. so SD trac motors arent smaller. SD's primarily came about as a way to spread the weight out. giving the SD a lighter axle loading than its counterpart GP. for railroads who wanted the high hp, but had light rail. so most everything on a GP38, and SD38 are the same parts. fuel tank, trucks, and frame being the major differences. in essence, both SD and GP 38 series pull the same, they both have the same power output to the trac motors. if either sd or gp trac mtr takes more than it can handle, well, do you smell smoke? you must understand the 'load' is a fixed load. meaning the altenator can only produce so much. basic example: take a 9volt battery. hook 4 xmas bulbs to it. note how well they lite up. now hook 2 more to the chain for a total of 6. notice they all still lite up, but not as bright? thats exactly how it works with traction motors. same power plant in both examples, just a different fraction of power per unit.

Q:I just purchased a miller big blue 400D diesel dc welder generator . I will be using 7018 rods. There are two controls on this unit, amps and volts, for best welding results, what is the best setting? I understand that metal thickness will change this this, but I' ll be starting on 1/4 plate. Any help will be appreciated.

When using a welder,use amperage setting .You need to set the machine to the size of rod that you will be using.

Q:Diesel generator selection criteria?

The performance and quality of the diesel generator set shall be in accordance with the relevant standards

Q:Electricity for all the computers, controls, and sensors and everything. Is electricity for these devices supplied by the nuclear reactor itself, or is it from an outside source? I've heard something about an emergency diesel generator but that's probably something else.

The power required to run house loads does come from the generator. If the generator trips off line because of a protective action or because the reactor itself has shut down, then the energy comes from the grid. If the grid has failed (perhaps causing the generator to trip) then power is still possible from a second offsite source. If both offsite sources fail for some reason, then the emergency diesel generators can power the required minimal loads required to cool the decay heat from the reactor.

Q:Details of the equipment and plant capacity are as under:Power generation plant having 02 gas generators and 01 diesel generator ( general maintenance outsourced)HVAC plant (general maintenance outsourced)Fire tube boilers one operational and one stand-by (maintenance by plant personnel)Automatic Lubricants Blending system (maintained by plant personnel)Blow molding machines (maintained by plant personnel)Injection molding machines (maintained by plant personnel)Screw Air compressors - 04 Nos (maintained by plant personnel)Fire Fighting Network including fire hydrants and monitors (maintained by plant personnel)General maintenance of 02 PE buildings and 01 RCC Office BlockAutomatic Filling machines (for small cans) (operated and maintained by plant personnel)Gear Pumps and motorsLubricants oil tank in tank farm areaMotor vehicles including 03 tank lorriesOverall maintenance of plant that is not included in above

If approached and done wisely, the screwing procedure (tightly or otherwise) might want to no longer require extra lubricant! If extra lubricant is needed some step replaced into both skipped or done at a below sufficient factor .