The main function of a step-up transformer is to change voltage, not to increase power or energy. It adapts to the needs of different power systems by changing the voltage, thus enabling the transmission and utilization of electrical energy.
Ideally, the input power of a transformer is equal to the output power, i.e. power is conserved in a transformer. Therefore, a step-up transformer does not increase the power. At the same time, energy is also conserved, and the transformer only changes the form of electrical energy, rather than increasing it.
Of course, in practice, the input power of a transformer will be slightly higher than the output power due to the presence of resistance, inductance and other losses. But this does not mean that the transformer has increased power or energy, but only that some of the energy in the conversion process in the form of heat energy loss.
Therefore, a step-up transformer does not have the function of increasing power or energy. When selecting and using a step-up transformer, emphasis should be placed on the efficiency and stability of its voltage conversion to ensure the safe and efficient operation of the power system.
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