Control transformers are essential components in industrial and commercial electrical systems, providing stable secondary voltage to operate control circuits. These transformers are designed to step down higher primary voltages to lower secondary voltages suitable for control circuits, ensuring reliable operation of equipment. They offer several key functions, including voltage conversion, electrical isolation between primary and secondary windings, stable output voltage, and handling of low power requirements typical of control circuits.

Control transformers are available in various configurations, such as single-phase and three-phase models, with different power ratings and voltage levels to suit specific applications. They are commonly used in control panels, motor control centers, HVAC systems, robotics, and automation processes. These transformers are engineered with precision, often featuring multiple taps on both the primary and secondary sides for fine adjustments in voltage output. They also provide electrical isolation, which is crucial for safety and performance, shielding control devices from external disturbances and protecting personnel from potential electrical hazards.

When selecting a control transformer, it is important to consider factors such as the required secondary voltage, total power requirements of the control circuit, inrush current of connected devices, ambient temperature, and potential future expansion needs. Proper installation, regular maintenance, and adherence to safety guidelines are also essential to ensure the longevity and reliability of control transformers.