What is the function of an oil ignition transformer in burner systems?

An oil ignition transformer in a burner converts incoming line voltage into a very high secondary voltage used to create a stable spark across ignition electrodes. That spark ignites the atomized fuel oil spray in the combustion chamber. The transformer is designed to deliver high voltage pulses or continuous AC at low current, with insulation and duty rating suitable for burner cycling. Reliable ignition reduces misfires, soot formation, and lockouts, improving safety and combustion efficiency in oil furnaces and boilers.