Principle of Electromagnetic Induction
A box-type transformer operates by utilizing high-voltage and low-voltage windings wound around a common iron core. When the high-voltage side is connected to a power source, the alternating current flowing through the high-voltage winding generates an alternating magnetic flux. This flux induces a voltage in the low-voltage winding within the core, thereby achieving the step-down or step-up of voltage. The transformer's rated turns ratio determines the proportional relationship between the voltages on the high- and low-voltage sides.
Power Transmission and Load Supply
Through the output terminals on the low-voltage side, the box-type transformer transmits electrical energy to the load, supplying power to users or equipment. Its internal structure typically integrates fuses, circuit breakers, and ground fault protection devices; in the event of an abnormal load condition or a line fault, these components automatically interrupt the power supply, thereby ensuring the safety of both the system and the equipment.
Heat Dissipation and Stable Operation
Since transformers generate copper losses and iron losses during operation, the enclosure is designed with either a natural air-cooling or a forced air-cooling system. By utilizing heat sinks or air ducts to mitigate temperature rise, the system ensures that the windings and insulation materials operate within safe temperature limits over the long term, thereby guaranteeing the stability and reliability of the power system.
