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Voltage is stepped up during transmission to reduce the power loss during transmission due to resistance. Power is a product of Voltage*Current, and losses due to resistance are directly proportional to the square of the current. Now when we increase the voltage , keeping the power constant, the subsequent current reduces.. thus in turn reducing the transmission losses.
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∙ 12y ago
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Why don't you step up voltage up to 900 Volt for transmission?
Voltages are nearly always stepped up for transmission, sometimes to 400,000 volts or more.
Is tranformer used to increase or decrease AC voltage?
The function of any transformer is to change one AC voltage value to another AC voltage value. A step down transformer will transform a higher AC voltage to a lower AC voltage. A step up transformer will transform a lower AC voltage to a higher AC voltage. The transmission of electrical power uses both of these types of transformers. From the generation station the voltage is stepped up to a very high transmission voltage and at the end of the transmission line it is stepped down to a voltage that consumers can utilize.
What is the function of step-down transformers?
The function of any transformer is to change one AC voltage value to another AC voltage value. A step down transformer will transform a higher AC voltage to a lower AC voltage. A step up transformer will transform a lower AC voltage to a higher AC voltage. The transmission of electrical power uses both of these types of Transformers. From the generation station the voltage is stepped up to a very high transmission voltage and at the end of the transmission line it is stepped down to a voltage that consumers can utilize.
Where would you use a step up transformer?
Wherever you need to step up (increase) an a.c. voltage. For example, the voltage generated by an alternator in a power station is far too low for transmission, so the alternator's voltage (of up to about 25 kV) would be stepped up to the 400 kV or so necessary for transmission.
Why you use ac for transmission?
AC is used for transmission because AC can be stepped up in voltage with a transformer, and then stepped back down at the destination. Since power is voltage times current, a higher voltage requires a smaller current to achieve the same power. Since the current carrying capacity of wires is based on wire size, a smaller wire size can be used to transmit the lower current.
Your usage 415v why getting 33kv?
If you want 415 volts, and you are getting 33,000 volts something is horribly wrong. Voltage is stepped up / stepped down for transmission to "load centers" (you) because of the "I^2 R" losses. Power = current squared times the resistance. The resistance of the conductor that is carrying your power is finite and cannot be made to be zero (unless you're using superconductors), so to minimize power loss incurred by transmission to you, the current must be decreased. This is accomplished by stepping the voltage up to a higher value (since power = voltage / current, the same power at a higher voltage can be delivered with a smaller current, thus less transmission loss). Voltage and current are stepped up/down using transformers. I hope this covers your question.
Where in the is the step transformer in the national grid?
Step up transformers are used to boost the voltage up for long distance transmission. At the other end, step down transformer are used to bring the voltage back to a working voltage for distribution to homes and industries
Why do transmission lines use alternating current?
Transmission lines use alternating current in order to support stepping-up and stepping-down of the voltage with transformers. Voltage is stepped-up at the power station, sent over the transmission lines, and stepped-down at the receiver. (This is a simplified explanation.) By stepping-up, you reduce the current carrying requirement of the lines, and they can thus be smaller.You could not do this with direct current as transformers only work for alternating current.
How does electricity get from the power stations to the consumers?
Usually through cables. The power produced by the generator (typically 24KV) is stepped up to the transmission voltage (typically 138KV) using transformers. At various substations, transformers, again, step the transmission voltage down to distribution voltage (typically 13.2KV). There is another step down at the service pole, where a transformer converts the distribution voltage to service voltage (typically 120/240V or 480V three phase).
Electricity in power stations is generated at 25 000 volts why is it transmitted across the National Grid system at 132 000 volts?
Voltage is stepped up to higher voltages for transmission in a power transmission system in order to reduce the current required to deliver a certain power and, as a result, to reduce the size of the conductors required. Remember that power is current times voltage, so increasing the voltage allows a reduction in current for the same amount of power. Also, remember that the size of the conductor is proportional to the amount of current alone. At the receiving substation, the transmission level voltage is stepped down to a distribution level voltage, typically in the range of 11 to 13KV. It is then stepped down to service level voltages at the local distribution transformer serving a business or a group of residences.
Why do you step up and then step down electricity from a power station?
With transformers. To answer "Why": It is more efficient to use high voltage over long distances, so the voltage is normally stepped up to standardized potentials for the journey. When it gets to your home it is stepped down to the proper potential for standardized household appliances.
What does a step up transformer increase?
Power is normally transmitted at high voltage through step up/step down transformers to minimize the power losses in the transmission lines (this is one reason anyway). Since power loss is equivalent to the resistance of the conductor times the current squared, stepping up the voltage by a factor of two cuts the transmission losses by a factor of (2^2 = ) 4.
