How much do you know about power transformers?

The main role of the power transformer is to transmit electrical power. The power distribution mode of the transformer is 10KV high-voltage power grid adopts three-phase three-wire in the way of never-grounded system operation. Most of the transformer power supply users choose to use the Yyn0 tie-line neutral point directly earthed however system operation, power transformers can achieve three-phase four-wire or five-wire power supply, such as TN-S system.

Power transformers are also a kind of static electrical equipment, which is used to convert the voltage (current) of a certain value of an AC power transformer into another voltage or voltage (current) of the same or different value. When the primary winding is connected to alternating current, alternating magnetic fluxes are generated. The alternating magnetic flux passes through the iron core and induces alternating current electromotive force in the secondary winding. The magnitude of the secondary induced electromotive force is related to the number of turns of a secondary winding, that is, the voltage magnitude is proportional to the number of turns.

The main function of a power transformer is to transmit electrical energy. Therefore, rated capacity is its main parameter. The rated capacity is a conventional value of the performance power, which is characterized by the size of the transmitted power, expressed in kVA or MVA. When a rated voltage is applied to the transformer, the rated current that does not exceed the temperature rise limit under the specified conditions is determined. Now more energy-efficient power transformers are amorphous alloy core distribution transformers, the biggest advantage is that the no-load loss value is extremely low. Ultimately, whether or not the no-load loss value is ensured is a central issue to be considered throughout the design process. When the product structure is arranged, in addition to taking into account that the amorphous alloy core itself is not affected by the external [1] force, the characteristic parameters of the amorphous alloy must be accurately and reasonably selected at the same time.