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Q: Why we use step down transformer in rectifier?
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How is 11kv convert to 230v?

The higher voltage it transformed to a lower voltage by the use of a step down transformer.


Can the two end of a center tap transformer be use with out a rectifier?

The twoends of a center tap transformer cannot be used without a rectifier.


What happens to the transformer ratings when you use a three phase step down as a step up transformer?

Nothing. The same rating is applicable.


What will happen to frequency of current when voltage is changed using a step up or step down transformer?

Frequency does not change when you use a step-up or step-down transformer. Only current and voltage is changed.


How do you convert 120 VAC to 120 VDC?

Of course you can! A transformer can change the voltage from 120 to 36. A rectifier can turn AC into DC. If you need constant voltage, capacitors to regulate flow can be added.


What is the use of step up and step down transformer?

step up transformer is to icrease the voltage but keeping the frequency same. step down is use to get less voltage than input given but of same frequency. Generally step down is use,we reqiure it in oor house(in mobile charger etc.).It is also use in rectifires.


Why transformer use in mid point cycloconverter?

For decrease the rectifier number


What type of transformer used in bed lamps?

If the bed lamps use a low voltage bulb then the type of transformer will be a step down transformer.


Which conditions are used in step up transformer?

Transformers, step up or step down, use mutual induction in their operation.


Can you use a step down transformer as a step up transformer by reversing the secondary voltage as a primary voltage?

Yes a Tesla coil or ignition coil is an example.


Does a basic transfomer in its normal operation use step up voltage step down voltage step up current or all?

A transformer has a primary and a secondary side. There is a ratio of windings from one side to the other that dictates whether it is a step up or step down transformer. The transformer is usually marked as to the input and output specifications. The current is directly proportional to voltage. If you had a transformer that was a step up from primary to secondary, it would be step down from secondary to primary.


How can you use step down transformer of 240 v ac to 24 v dc as step up transformer?

A step down transformer has a higher voltage (in this case 240v) primary and a lower voltage (in this case 24v) secondary. A step up transformer has a lower voltage primary and higher voltage secondary. In reality the transformer doesn't care which is which, so if you wire the 24v side as the primary and the 240v side as the secondary, you have a step up transformer. You might want to stick a fan on it to be sure it doesn't overheat, but that's all you need do.AnswerFrom your question, it sounds as though you are describing a power supply, rather than a transformer, as you specify the output is 24-V d.c. (direct current). Unfortunately, you cannot apply 24-V d.c. to the output side of a power supply, in order to obtain a 240-V a.c. output at the input side! This is because a power supply consists of a transformer to step down the a.c. voltage, and a rectifier (and, possibly, a smoothing filter) to produce a d.c. output. Applying d.c. to the input of a rectifier will not produce the a.c. necessary to run your transformer in the opposite direction!