75kVA Three Phase Power Transformer With 380V Output

A power transformer is a device operating with high voltages in power system, primarily to adjust voltage levels between generators and distribution circuits. It consists of two or more windings linked magnetically via a core. Current variations in one winding induce changes in magnetic flux in the core, thereby generating voltage in other windings. The voltage ratio between primary and secondary windings depends on their turn ratios.

Power Transformers Used
Power transformers are used for several reasons in the electrical power system. Some of them are:

• To reduce power loss in transmission lines: Electrical power is generated at low voltage levels, which results in high current and high line losses due to ohmic heating. By using a step-up transformer at the generating station, the voltage level can be increased, and the current can be reduced, which reduces the line losses and improves the power factor. Similarly, at the receiving end, a step-down transformer can be used to lower the voltage level to a suitable value for distribution and consumption.
• Galvanic Isolation Provided: Power transformers ensure electrical isolation between circuits with different potentials or frequencies. This protection prevents short circuits, ground faults, and equipment damage due to electrical interference.
• Impedance Matching: By adjusting voltage and current levels, power transformers match the load impedance with the source impedance, enhancing power transfer and circuit efficiency.
• Voltage Level Adjustment: Power transformers supply various voltage levels suited for diverse applications—lighting, heating, and communication. For instance, a three-phase transformer can deliver both three-phase power for industry and single-phase for home use.