Electric Generator II

Electric Generators for prime power for construction sites or off grid homes. Know more about electric generator basic principles, information & electricity.

 Our Electric Generators can provide prime power for construction sites or off grid homes.  The legendary John Deere Diesel Engine is used in the SDMO product from 40-275kW   For most cases you can proceed as if a small power station was connected directly to your house.

Diesel Generator: We have seen that electrical current causes a heating effect, and if the current is large, or the electrical resistance high, this effect can be enough to cause damage or a fire. Fire, as a result of overheating, is one of the main risks from sloppy electrical work. However, the tendency of a high current to cause a wire to melt and break is put to good use in the design of the fuse.

A fuse is a simple device that will limit the current flowing in an electrical circuit. In practice a fuse normally consists of a piece of wire of exactly the right length and thickness to overheat and break when the current gets to a particular level. If an excessive current occurs, we hope the fuse will `blow' rather than some other part of the circuit overheating. This is called over-current protection.

For now, the important thing to remember is that the fuse must be able to withstand a higher current than the appliances to which it is connected (otherwise it would blow unnecessarily), but a lower current than the cables which connect them. This ensures that in the event of a fault, the fuse will blow before the cable is damaged.

While fuses are still widely used, miniature circuit breakers (MCBs) are now increasingly replacing them. On the whole it is moderate overheating that is the problem in electrical wiring, not huge current overloads. If you get a short-circuit between live and neutral in a power outlet, for example, the current that will flow will be immense. Without a fuse it could easily rise to thousands of amps.

Now, although this would be inconvenient, oddly enough it probably wouldn't be all that dangerous, because the cable will simply melt right through in a fraction of a second and break the circuit. There would be an enormous bang and a puff of smoke and that would be the end of the problem. It will be the beginning of your hard work, of course, as you struggle to find which floorboard the burned-out cable is under, but that's a different matter.

Electric Generator Store: In a domestic mains system, the `power source' is essentially the wires that bring the electrical supply into the house (and all the power stations, etc., that they're connected to). Since we don't have any control over that, we can usefully think of it as a 230 volt power source without worrying to much about it.

This circuit will power the appliance (whatever it is) and, because there is not even a switch, it will continue to power it forever, or until the power runs out. Because we are dealing with alternating currents, the flow of current around the circuit is constantly changing direction (but this does not cause any problem, as discussed above).