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That is the maximum efficiency occurs when the copper losses are equal to the core losses of the transformer.

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13y ago

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Why are distribution transformers frequently designed to develop maximum efficiency at loads that are somewhat lower than rated value?

It is always desirable to run any equipment or device at maximum efficiency for that matter, not only the power transformer. Power transformer maximum efficiency occurs when copper loss is equal to iron loss. (or no load loss equals to load loss). This does not necessariliy mean that maximum efficiency occurs at maximum or full load. Generally the maximum efficiency occurs at relatively less than full load of the transformer.


Why the efficiency of a power transformer increases with a decrease in Load at constant PF?

Maximum efficiency of a power transformer occurs when copper loss equals to iron losses. Decrease in current does not result in increase in efficiency unless the copper loss was more than iron loss and the decreased current made the copper loss is reduced and became equal to iron loss at some point.


What is mean core saturation?

Core saturation occurs in electrical transformers when the magnetic flux in the core reaches its maximum limit, resulting in a decrease in efficiency and potential overheating. It can be caused by excessive current or voltage in the transformer, leading to distortion in the output waveform and potential damage to the transformer.


What is the transformation that occurs in a transformer?

Chemical to heat


What is rated voltage in transformer?

A: A transformer will transform the AC input to a low or hi output as required by a ratio of input to output. The power will be expressed a KVA or kilo volts to ampere ratio. It also will have a rating of maximum voltage for the simple reason of winding to winding insulation and primary to secondary isolation because if breakdown occurs the transformer will burn out promptly.


Why percentage differential protection is preferred over differential protectionfor internal faults?

if we are seeking for internal protection of transformer only, then if any external fault occurs then it will show the fault though it should not. what a percentage differential protection will do means, it will include a restraining coil which is excited by the current in the transformer itself. Also the percentage differential relay ha taps. So it is easy to avoid the external fault. for reference check 'theory and applications of transformer differential protection' by GEORGE W.McKENNA, AIEE transactions 1950,volume 69


What is meant by perfect combustion?

Perfect combustion occurs when a fuel is burned completely in the presence of sufficient oxygen, resulting in the production of carbon dioxide and water as the only byproducts. This ideal process is characterized by maximum heat release and high efficiency.


What is off nominal tap ratio off transformer?

It occurs when Vbase rotio of both side of the Transformer is not the same as the Rated Voltge rotio.


How do you increase the effciency of a transformer?

You can manufacture the transformer using larger guage wire to reduce resistance.AnswerTransformers are already designed to have very high efficiencies. There would be very little you could do that the designer hasn't already done. But it would involve changing the core material (to reduce hysteresis losses), changing the design of the core (to reduce eddy current losses and leakage reactance), and using conductors with lower resistance (to reduce the copper losses). -----------You have pointed out additional ways to improve efficiency. I don't really know which may reduce losses the most, but I2R losses have to be a significant contribution. Note that the question was "How do you (the mfg) increas the efficiency of a transformer NOT whether or not they are already doing it. The simple answer is that you increase the efficiency by modifying anything that reduces energy losses. I still believe the wire size would be a large contibutor in a steady state condition. --glennyD---To accommodate conductors with a larger cross-sectional area (guage), the core would have to be larger (increased mass) causing increased core losses. Maximum efficiency occurs when core losses and copper losses are the same.


How does Kinetic and Potential energy relate to Pendulums in different ways?

Maximum kinetic energy occurs at the bottom of the swing. Maximum potential energy occurs at the top of the swing.


Where does Maximum formation of RNA occurs?

Maximum formation of RNA occurs in the nucleus of eukaryotic cells, where transcription takes place. RNA is produced from DNA templates by the enzyme RNA polymerase, and the nucleus provides a controlled environment for this process to occur efficiently.


Efficiency occurs in the PCI-Express by sending transmission in forms of what?

Packets