Transmission Line with Inbuilt Variable Voltage Source is designed to study the performance of lines and the line parameters are calculated by considering the 100-Km length, single circuit, 3-Ph., transposed conductors, and 220 kV line voltages. The Transmission Line is designed with inbuilt variable voltage source operated on 230 V AC supply. The Transmission Line comes with digital voltmeter and ammeter for voltage and current measurement. Transmission Line with Inbuilt Variable Voltage Source is available with industrial grade power coated MS panel.