Explain about Dubai drinking water system? Explain about Dubai Burj tallest building Electrical,Water. What type of tranformer generaly at soft wares like capacity kva kva etc iam confused it CT or PT OR distribution tranformer. Is This Answer Correct? Where as the High voltage transfer more power with same loss in the line when compared with a Low voltage line Is This Answer Correct? More Electrical Engineering Interview Questions.
What are insulation classes? This tradeoff would not be the same today with the high cost of energy, but once something becomes standard there is no way to change it. VVV Advanced Member level 5. Initially many countries had V, since it was considered safer for humans.
In the US, there were so many V appliances in use, that it was deemed an unreasonable waste to switch to V and render them useless. This is more of political issue than pure engineering or economic problem. We went through an interim solution, i.
Suppose wires A, B, and C are coming in to your house, and wire B is grounded. If you use A-C, you get V which is good for new appliances. Now, the entire country is V. It took more than 10 years. Activity points 5, Unless you are talking about designing transformers? The deciding factors are current v cable thickness. I tried to gather info. Lets start from Edison who invented Electricity. According to some sources Edison's original lightbulb was designed to work with around V DC.
More voltage means more insulation required. More current means more heating generated. You have to choose one of them. And hence the equipment cost reduces. Of course this is the single phase voltage, while the real power is delivered at 3-phase. Keeping in mind the higher the voltage the better, the limit was the VIR vulcanised india rubber insulation used on cables at the time.
Overhead transmission lines carry very high voltage to reduce heating loss in transmission. As I said earlier more voltage means less current and less current means less heat generated, and less heat means less loss of energy.
The Hz doesn't make any difference. At volts you need to draw twice the current for the same power. Wiring heats up with current so you have more heat with the lower voltage. This could lead to more fires. I think because of more current more no. But the increased voltage will push more current through your body if you accidently contact live wires.
This has a greater potential of causing a death. Can any one tell me which is easier? Hence the Total impedance of the circuit also reduces. Increase Voltage V, decrease the current flow of electron or charges flowing through the circuit. If your circuit carries the larger quantity of current, you should increase the size of the conductor.
If you supply a high voltage, the total current reduces and you do not want to go for larger size conductor. Copper and aluminum are mainly used in the electrical system to carry current to the other circuit. Example: Take a steam power plant which is running with coal and the coal to the steam ratio of the boiler is 4. But the Steam to power ratio is 2. The coal cost is Rs. To avoid this, we have to reduce the auxiliary consumption. Auxiliary consumption can be reduced by reducing losses of the plant.
When we increase the frequency of the generation, simultaneously, the output voltage also increases. Hence the insulation strength to increase the increasing voltage. Corona Losses also decrease when the frequency of the system decreases. So that 50 Hz power system have less corona losses.
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