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If why are there transformers that step up the voltage exiting power plants?
Wiki User
∙ 10y ago
Transmission lines have resistance. Higher voltage can "push" more current through them, thus delivering more power to the consumer.
Another AnswerThe power supplied (i.e. the rate at which energy is supplied) by an electricity transmission line is determined by the load NOT, as insinuated by the original answer, by the supply.
For a given load, the greater the supply voltage, the LOWER the resulting load current. So Transformers are used at power stations to increase the transmission voltage in order to MINIMISE the current (not to 'push more current through'!).
Electricity transmission is only possible because of high voltages causing a reduction in the load current, because, otherwise, the resulting voltage drop in the line would be far too great to supply distant loads.
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Wiki User
∙ 10y ago
Wiki User
∙ 14y agoThe higher voltage makes the transfer of power more efficient over long distances. The transformer near your house lowers the voltage to a usable level. If it weren't so tricky and dangerous to work with in a household setting, the higher voltage would still be more efficient even there.
Wiki User
∙ 14y agoElectricity is first generated at the Generation Station (GS) at approximately 13.8 KV in three phases (depending on the type of generator), KV being thousand volts. Then it is delivered to a Transmission Station (TS) (usually located near to the generation station) where this voltage is raised using a transformer to levels ranging from 115 KV to 800 KV and up. The voltage level depends on the distance being transported. Higher voltage levels are used for longer distances because there are less losses. Then after being transported long distances it enters a Distribution Station (DS) where the voltage is now lowered to 7.2 KV - 30 KV generally. DS's are usually located not too far from your house since lower voltages are not used to transport power very far. Then usually at the end of you drive way there will be a single phase transformer connected to one of the three phases that will further lower the 7.2 KV down to 120/240 V that is used in you house. This is just a VERY brief overview of how electricity gets to your house. In reality it is much more complicated but this should give you a general understanding.
Wiki User
∙ 13y agoElectric power plants raise the voltage that leaves them in order to decrease the required current for an equivalent amount of power. This reduces the required size of the conductors in the transmission and distribution wires. At the service transformer in the street or in the vault that higher voltage is stepped back down to the levels required for your home.
Wiki User
∙ 12y agoBecause the loss of energy in the transmission cables ... energy that the utility
company generates or buys but loses before they can sell it ... is greater at low
voltage/high current, and less at high voltage/low current.
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Why you use transformers to transfer power?
Transformers do not exactly transfer power, they either step up voltage or step down the voltage from one source to another to make it a useable voltage.
Why are transformers used to increase the voltage before transmission?
Using a higher voltage reduces power losses during transmission.
What are at least 2 types of electrical transformers in science?
A variety of electrical transformers are produced for a variety of purposes. All of the types use the same principle discovered by Michael Faraday, and employ many of the same parts. The various types include. Audio transformers, Instrument transformers, Pulse transformers, Power transformers, RF transformers. .
Which type of electrical power-related tranformer steps up the voltage to several hundred thousand volts in order to reduce energy losses?
Step-up transformers of the type you describe are three-phase transformers which, in the transmission system, are classified as 'power transformers'.
What allows simple transformers to step up or down?
The voltage ratio in transformers used in power supply is set by the ratio of the number of turns on the primary and secondary windings.
What are the advantages of power transformers over voltage transformers?
Power transformers can be used for power transformation. Voltage transformers are not suitable for high power applications.
Why you use transformers to transfer power?
Transformers do not exactly transfer power, they either step up voltage or step down the voltage from one source to another to make it a useable voltage.
What is transmission of power?
it is basically the transportation of electrical power from the power generation plant (eskom) via step up voltage transformers to the substation (step down transformers. to the distribution of the consumers.
Why are transformers necessary?
Transformers are necessary to stepup or stepdown voltage levels so that transmission of power is convenient. without stepup/stepdown voltage level according to our requirement losses will be very high and transmission and usage of power is not feasible.
Why are transformers used to increase the voltage before transmission?
Using a higher voltage reduces power losses during transmission.
What are at least 2 types of electrical transformers in science?
A variety of electrical transformers are produced for a variety of purposes. All of the types use the same principle discovered by Michael Faraday, and employ many of the same parts. The various types include. Audio transformers, Instrument transformers, Pulse transformers, Power transformers, RF transformers. .
What are the applications of autotransformer?
Power transformers may be step-up or step-down. Distribution transformers are step-down. Isolation transformers are 1:1 ration transformers. Matching transformers are used in electronic circuits for impedence matching purposes. Instrument transformers are used to measure high-voltage voltages and currents or to operate protective systems.
What is a transformer and its functions?
Voltage transformer or potential Transformers are used in conjunction with Current transformers for metering and protection purpose in HT and LT power system.
Certain electric devices such as cordless telephones have small transformers that plug into walls.what do the transformers do?
Transformers are relatively simple devices which change both the current and the voltage of an electric source without affecting the total amount of power being given. Power, as the product of current and voltage, is mostly conserved as transformers are used, but the current and voltage changes. If the device needs just half the voltage of what is coming out of your wall (240v in Australia), then it will 'step down' this voltage by half, but will have to 'step up' the current, so your voltage will halve, your current will double, but the total amount of power will remain the same. Essentially the transformer exists to give your device the required input of electricity so your device is not fried!
Does centre tap transformer convert ac voltage to ac voltage?
Yes. Transformers convert power by stepping up or down voltage. It doesn't matter what tap configuration they have.
Why are transformer used with power tools?
Transformers are used with tools that operate on less than 'mains' voltage.
How a transformer is so important?
Transformers transform low vvoltages to hivh and vice versa. This is important in transmitting electrical power form the high voltage power plant to the low voltage home voltage. Using high voltage transmission reduces transmission power losses, I2R.
