why do we need step up transformers

\"\"

Power stations are built in order to generate electricity. The diagram shows the main steps involved. The energy needed to boil the water comes from fossil fuels or nuclear fuels. Renewable energy resources such as wind and wave power may drive the generators directly. A transformer is an electrical device that changes the voltage of an alternating current (ac) supply, such as the mains electrical supply. A transformer changes a high-voltage supply into a low-voltage one, or vice versa. A transformer that increases the voltage is called a step-up transformer. A transformer that decreases the voltage is called a step-down transformer. Electricity is transferred from power stations to consumers through the wires and cables of the National Grid.

\"\"

When a current flows through a wire some energy is lost as heat. The higher the current, the more heat is lost. To reduce these losses,
the National Grid transmits electricity at a low current. This needs a high voltage. Power stations produce electricity at 25,000V. Electricity is sent through the National Grid cables at 400,000V, 275,000V and 132,000V. Step-up transformers are used at power stations to produce the very high voltages needed to transmit electricity through the National Grid power lines. These high voltages are too dangerous to use in the home, so step-down transformers are used locally to reduce the voltage to safe levels.

The voltage of household electricity is about 230V. A transformer is an electrical device that changes the voltage of an AC supply. A transformer changes a high-voltage supply into a low-voltage one, or vice versa. A transformer that increases the voltage is called a step-up transformer A transformer that decreases the voltage is called a step-down transformer Step-down transformers are used in mains adapters and rechargers for mobile phones and CD players. When a current flows through a wire, some energy is lost as heat. The higher the current, the more heat is lost. The National Grid transmits electricity at a low current to reduce these losses. This requires a high voltage. Power stations produce electricity at 25,000V. Electricity is sent through the National Grid cables at 400,000V, 275,000V and 132,000V. Step-up transformers at power stations produce the very high voltages needed to transmit electricity through the National Grid power lines.

This is because high voltages improve efficiency by reducing heat loss in the power lines. But high voltages are too dangerous for use in the home, so step-down transformers are used locally to reduce the voltage to safe levels. Power lines and substations are potentially dangerous as an electric shock can kill someone who gets too close to such a high voltage supply. Now try a – foundation. read on if you\’re taking the higher paper.

Show More

Related Articles

Leave a Reply

Your email address will not be published. Required fields are marked *

Back to top button
Close