How does a power supply work?

Most notably, it is produced in three phases. It has transformers that step transmission voltages (in the tens or hundreds of thousands of volts range) down to distribution voltages (typically less than 10,000 volts). It has a "bus" that can split the distribution power off in multiple directions.

Why is electricity transmitted at higher voltages?

Electric power is transmitted at higher voltages to limit the power losses that can occur in long distance transmission lines. Power can be transmitted across states, from one side of the country to the other, or across different countries.

What voltage levels are sent directly to the customers?

The voltage levels sent directly to the smaller customers are generally single-phase AC and at 240VAC. Larger customers may require 480VAC or higher at 3-phase power. These smaller voltage levels are delivered to the end users by either pole mounted or pad mounted distribution transformers usually located outside the facility.

What happens if a 120 volt power line goes directly to ground?

When a 120-volt power line connects directly to ground, its goal in life is to pump as much electricity as possible through the connection. Either the device or the wire in the wall will burst into flames in such a situation. (The wire in the wall will get hot like the element in an electric oven gets hot, which is to say very hot!).

How are power stations interconnected?

The power stations are also interconnected by an interconnector, which is carrying current I i. The transfer of power is taking place as shown by direction of arrows (Fig. 13.16).

What is the difference between power and voltage?

Power is current divided by voltage. Power is current times voltage. Power is voltage divided by current. Power is voltage. Power is current times voltage. When the filament breaks in one lamp in a series circuit, other lamps in the circuit normally _________.