800 VA control transformer

A control transformer is an electrical device used to control the magnitude of AC voltage. It consists of a primary winding and a secondary winding, with the primary winding connected to the power source and the secondary winding connected to the load. By changing the wiring configuration of the secondary winding, the output voltage can be adjusted. The operating principle of a control transformer is based on magnetic coupling. When the current in the primary winding changes, it generates a magnetic field in the secondary winding, which induces a change in the electromotive force in the secondary winding, thereby producing different voltages on the load.
Control transformers typically use a variable secondary winding, which consists of multiple winding branches. By selecting different winding branches, the output voltage can be varied. Additionally, control transformers can also utilize electronic components such as SCR (silicon-controlled rectifier) for regulation. Control transformers are primarily suitable for AC circuits of 50Hz (or 60Hz) and voltages of 1000V or below, capable of continuous long-term operation under rated load. They are commonly used in machine tools and mechanical equipment as power sources for control lighting and indicator lights.